US Pat. No. 9,051,282

METHODS FOR TRIAZOLE SYNTHESIS

CHEMTREAT, INC., Glen Al...

1. A method for synthesizing a 1,2,3-triazole compound in an aqueous solution comprising:
forming an aqueous solution of a diamine and a nitrite salt;
introducing carbon dioxide into the aqueous solution to form carbonic acid;
reacting a portion of the carbonic acid with the nitrite salt to produce nitrous acid and a bicarbonate; and
reacting the diamine with a portion of the nitrous acid for a reaction period at a reaction pressure and a reaction temperature
sufficient to produce the 1,2,3-triazole compound.

US Pat. No. 9,221,701

METHODS FOR REDUCING SCALE FORMATION ON AND REMOVING DEPOSITS FROM HEAT TRANSFER SURFACES

CHEMTREAT, INC., Glen Al...

1. A method of operating a falling film evaporator comprising:
introducing a water feed stream into the falling film evaporator, wherein the water feed stream contains (i) silicon, and
(ii) greater than 200 ppm of a component selected from the group consisting of magnesium, calcium, and a combination thereof,
as measured in ppm of calcium carbonate equivalent;

evaporating a portion of the hard-water feed stream to produce a falling film evaporator concentrate; and
adjusting a pHcold value of the falling film evaporator concentrate to a value in the range of 10.8 to 12.

US Pat. No. 9,328,276

METHOD AND APPARATUS FOR IMPROVING HEAT TRANSFER IN INDUSTRIAL WATER SYSTEMS WITH FERROFLUIDS

CHEMTREAT, INC., Glen Al...

1. A method of managing equipment temperature comprising:
preparing a ferrofluid;
combining the ferrofluid with a water-based working fluid to produce an enhanced working fluid containing a mixture of the
ferrofluid and the working fluid, wherein a heat capacity of the enhanced working fluid is greater than a heat capacity of
the working fluid;

circulating the enhanced working fluid containing the mixture through the equipment; and
controlling heat transfer between the equipment and the enhanced working fluid in response to a sensed parameter relating
to temperature by adjusting one or more of:

(i) an enhanced working fluid flow rate through the equipment, and
(ii) a concentration of ferrofluid in the circulating enhanced working fluid.
US Pat. No. 9,227,156

METHOD AND APPARATUS FOR REACTIVE GAS REMEDIATION

CHEMTREAT, INC., Glen Al...

1. A method for reducing acidic gas contamination, the method comprising:
directing a feed gas stream containing a pretreatment concentration of an acidic gas compound onto carrier particles, the
carrier particles having a surface supporting a treatment compound; and

reacting a portion of the acidic gas compound with the treatment compound under conditions whereby the portion of the acidic
gas compound is consumed to produce a treated gas stream,

wherein the acidic gas compound is selected from the group consisting of hydrogen cyanide, hydrogen sulfide, hydrochloric
acid, hydrogen fluoride, hydrogen iodide, hydrogen bromide, nitric acid vapor, chlorine, carbon disulfide, mercaptans and
mixtures thereof.

US Pat. No. 9,290,849

CORROSION CONTROL METHODS

CHEMTREAT, INC., Glen Al...

1. A method of suppressing corrosion of a corrodible metal surface that contacts a water stream in a water system, the method
comprising:
(a) introducing into the water stream a shot dose of a treatment composition comprising a corrosion inhibitor in amounts sufficient
to provide a stable film of Tin(IV) on the metal surface, the shot dose being introduced into the water stream over a first
time period and the water stream having a first concentration of corrosion inhibitor during the first time period;

(b) then reducing the amount of treatment composition that is introduced into the water stream;
(c) after the first time period, maintaining a second concentration of corrosion inhibitor in the water stream over a second
time period, the second concentration being less than 25% of the concentration of corrosion inhibitor during the first time
period; and

(d) then increasing the amount of treatment composition that is introduced into the water stream during a third time period
at a third concentration that is higher than the second concentration and is in the range of 20 to 100% of the first concentration,
the third concentration being sufficient to maintain or re-stabilize portions of the stable film of Tin(IV) on the metal surface.

US Pat. No. 9,200,339

DIRECT REDUCTION OF IRON (DRI) PELLET TREATMENTS

CHEMTREAT, INC., Glen Al...

1. A method of treating direct reduced iron (DRI) pellets, comprising applying a foam to the DRI pellets,
wherein the foam has an expansion ratio of about 20-40and a bubble size of about 200 microns or less, and
wherein the foam includes a foaming agent selected from the group consisting of sodium, potassium, and ammonium salts of alkyl
aryl sulfates and sulfonates.

US Pat. No. 9,567,216

REDUCING AGENTS FOR PRODUCING CHLORINE DIOXIDE

CHEMTREAT, INC., Glen Al...

1. A method of producing chlorine dioxide, the method comprising:
providing an acid solution, a chlorate salt and an organic water treatment additive that can form a phosphine compound, the
phosphine compound being effective to reduce the chlorate salt;

then mixing the chlorate salt and the organic water treatment additive with the acid solution at a ratio of 1-20 grams combined
chlorate salt and organic water treatment additive per 100 ml of the acid solution, and the chlorate salt and the organic
water treatment additive being respectively present in the mixture at a ratio in the range of 1:1 to 4:1 by molar basis; and

reacting the mixture at a temperature greater than 35° C. so that the phosphine compound reduces the chlorate salt and thereby
produces chlorine dioxide at a concentration in the range of 1 to 20,000 ppm.

US Pat. No. 9,499,662

FOAM CONTROL COMPOSITIONS

CHEMTREAT, INC., Glen Al...

1. A foam control composition comprising:
a polyoxyethylene-polyoxypropylene non-ionic fatty amine derived from a fatty acid, wherein the polyoxyethylene-polyoxypropylene
non-ionic fatty amine derived from a fatty acid includes polyoxyethylene and polyoxypropylene units; and

a quaternary ammonium surfactant,
wherein a weight ratio of the polyoxyethylene-polyoxypropylene non-ionic fatty amine derived from a fatty acid to the quaternary
ammonium surfactant is from 2:1 to 30:1, and

wherein the polyoxyethylene-polyoxypropylene non-ionic fatty amine derived from a fatty acid is present in the foam control
composition in an amount of 10 wt % to 50 wt %.

US Pat. No. 9,382,629

PREVENTING EQUIPMENT FOULING VIA CORROSION REDUCTION

CHEMTREAT, INC., Glen Al...

1. A method of preventing hydrocarbon fouling of a metallic component used in an oil recovery system, the method comprising:
passivating the metallic component for use in the oil recovery system, and
contacting the surface of the metallic component with a hydrocarbon-containing process water stream of the oil recovery system,
wherein the hydrocarbon-containing process water stream is a water portion that is separated from an oil portion in an oil/water
mixture that is obtained from an oil-recovery operation.

US Pat. No. 9,115,432

METHODS AND COMPOSITIONS FOR INHIBITING METAL CORROSION IN HEATED AQUEOUS SOLUTIONS

CHEMTREAT, INC., Glen Al...

1. A method of suppressing metal corrosion in an open water system, the method comprising:
preparing a stannous concentrate including a tin compound and a reducing agent, wherein the reducing agent is present in an
amount sufficient to maintain a reducing environment for the tin compound in the stannous concentrate;

modifying an aqueous working solution through addition of the stannous concentrate to sufficient to achieve a target concentration
range of tin in a modified working solution;

applying the modified working solution to metal surfaces at a working temperature in excess of 35° C. in the open water system.

US Pat. No. 9,889,452

METHODS FOR FACILITATING MINERAL EXTRACTION

CHEMTREAT, INC., Glen Al...

1. A method for separating at least one target material from a raw material, the method comprising:
mixing the raw material, which includes the target material, with water to form a slurry;
adding at least one collector compound to the slurry that associates with a surface of the target material and modifies the
hydrophobicity of the surface;

adding a facilitator compound to the slurry, the facilitator compound being effective to enhance the modification of the hydrophobicity
of the target material surface by the collector compound; and

forming a froth including a concentrate of the target material.

US Pat. No. 9,498,749

METHOD TO NEUTRALIZE HYDROGEN CHLORIDE IN SUPERHEATED GEOTHERMAL STEAM WITHOUT DESTROYING SUPERHEAT

CHEMTREAT, INC., Glen Al...

1. A method of neutralizing at least part of the acidic impurities present in a superheated steam by contacting the superheated
steam with one or more aqueous liquids, wherein:
at least one of said aqueous liquids comprises an alkaline compound of potassium,
the superheated steam comes from a geothermal source and contains the acidic impurity hydrogen chloride,
the superheated steam is characterized by a temperature and a degree of superheat that is greater than a degree of superheat
of steam at equilibrium with a saturated solution of sodium carbonate at said temperature,

a volume and composition of said aqueous liquids are predetermined such that:
the superheated steam remains superheated after said contacting step, all of the hydrogen chloride is neutralized, and
said contacting step does not produce solid deposits of potassium chloride, and
if the superheated steam is characterized by a temperature and a degree of superheat that would otherwise produce solid deposits
of potassium chloride, then at least one of the following conditions is met:

at least one of said aqueous liquids further comprises a potassium salt capable of supporting at least as much superheat as
potassium chloride,

at least one of said aqueous liquids further comprises a salt inhibitor, and
the aggregate amount of water in said aqueous liquids is selected to decrease the degree of superheat of the superheated steam
by an amount sufficient to prevent solid deposits of potassium chloride from forming.

US Pat. No. 9,976,090

METHODS FOR REDUCING SURFACE FOULING IN FUEL PRODUCTION SYSTEMS

CHEMTREAT, INC, Glen All...

1. A method of preventing or reducing fouling of equipment having a metal surface that contacts a reaction byproduct gas stream in a fuel production system, the method comprising:atomizing a fouling inhibitor composition and combining the atomized fouling inhibitor composition with the byproduct gas stream, the fouling inhibitor composition containing 20% to 100% by weight of a bicyclic organic compound with an aromatic ring and a heterocyclic ring; and
causing the fouling inhibitor treatment composition to contact the metal surface by flowing the byproduct gas stream including the fouling inhibitor composition over the metal surface for a treatment period that is sufficient to reduce a hydrocarbon fouling deposit on at least a portion of the metal surface,
wherein the bicyclic organic compound is present in the byproduct gas stream at a concentration in the range of 0.05 to 100 pints per million cubic feet (0.836 to 1,670 ml/million liters) of gas during the treatment period.

US Pat. No. 10,024,751

FLUID SYSTEM EVALUATION WITH MULTIPLE CHEMICAL TRACERS

CHEMTREAT, INC, Glen All...

1. A method for evaluating a fluid system in which fluid flows through the system, the method comprising:(a) introducing a plurality of chemical tracers into the fluid, including at least one reactive tracer that is reactive in the fluid to at least one of the fluid temperature and fluid pH, each of the plurality of chemical tracers providing a measurable signal, and the measurable signal of the at least one reactive tracer changing intensity as the reactive tracer reacts in the fluid;
(b) measuring the signals of each of the plurality of chemical tracers in the fluid system;
(c) determining an indicator of a fluid system operating response based on a relationship between the measured signal of the reactive chemical tracer and the measured signal of another chemical tracer of the plurality of chemical tracers;
(d) comparing the indicator of the fluid system operating response in step (c) with an indicator of an expected response of the fluid system; and
(e) using the comparison in step (d) to (i) evaluate an operating property of the fluid system; and/or (ii) determine whether an event has occurred in the fluid system.

US Pat. No. 9,977,004

SYSTEMS AND METHODS FOR CONTROLLING CATIONIC WATER TREATMENT ADDITIVES

CHEMTREAT, INC., Glen Al...

1. A method for controlling an amount of an anionic surfactant added to water in an industrial water system that includes a cationic organic water treatment additive, the method comprising:adding to the water (i) a first fluorescent dye configured to interact with the cationic additive thereby reducing a fluorescence intensity signal of the first fluorescent dye, and (ii) a second fluorescent dye that is substantially inert to the cationic additive, the first fluorescent dye and the second fluorescent dye being applied to the water in a predetermined concentration ratio;
adding to the water an anionic surfactant that binds with the cationic additive thereby blocking the interaction of the first fluorescent dye with the cationic additive, which increases the fluorescence intensity signal of the first fluorescent dye;
measuring a fluorescence intensity of each of the first fluorescent dye and the second fluorescent dye to establish a fluorescence intensity signal ratio;
comparing the fluorescence intensity signal ratio to a predetermined fluorescence intensity signal ratio; and
controlling an amount of the anionic surfactant added to the water based on the comparison of the fluorescence intensity signal ratio to the predetermined fluorescence intensity signal ratio.

US Pat. No. 10,005,665

METHODS AND SYSTEMS FOR PRODUCING HIGH PURITY GASEOUS CHLORINE DIOXIDE

CHEMTREAT, INC., Glen Al...

1. A method of producing gaseous chlorine dioxide, the method comprising:contacting a dry chlorite reactant with an ozone-containing gas; and
reacting the ozone in the ozone-containing gas with the dry chlorite reactant at a gas-solid interface between the ozone-containing gas and the dry chlorite reactant to produce the gaseous chlorine dioxide.
US Pat. No. 9,890,066

COMPOSITION AND SYSTEM FOR TREATING PAINT SPRAY BOOTH WATER

CHEMTREAT, INC., Glen Al...

1. A detackifying composition consisting essentially of:
an acidic aqueous solution of a cationic starch; and
a water soluble, inorganic metal salt selected from the group consisting of iron halogen salts, alum, aluminum chloride, and
ferric sulfate.

US Pat. No. 9,890,061

COMPOSITIONS AND METHODS FOR SELECTIVE ANION REMOVAL

CHEMTREAT, INC., Glen Al...

1. A method for removing one or more target anionic entities from a fluid, comprising:
performing a treatment operation comprising:
forming a treated fluid by contacting a fluid comprising a target anionic entity with a porous substrate including a cationic
rare earth that is precipitated directly on one or more surfaces of the porous substrate so that the precipitated cationic
rare earth is

(i) fixed or trapped inside a porous structure of the porous substrate in an immobilized state and/or
(ii) fixed on an outer surface of the porous substrate in an immobilized state,
the contacting being sufficient to remove at least a portion of the target anionic entity from the fluid comprising the target
anionic entity because the target anionic entity associates with the precipitated cationic rare earth; and

then forming a regenerated porous substrate comprising the precipitated cationic rare earth by regenerating a capacity of
the porous substrate for removing the target anionic entity by treating the porous substrate with a base; wherein

less than about 0.5% mass loss of the precipitated cationic rare earth occurs during the treatment operation, the mass loss
being relative to an initial mass of the precipitated rare earth in or on the one or more surfaces of the porous substrate
prior to the porous substrate being contacted with the fluid comprising the target anionic entity, where all remaining precipitated
cationic rare earth remains in an immobilized state inside the porous structure of the porous substrate and/or remains in
an immobilized state fixed on the outer surface of the porous substrate.

US Pat. No. 10,174,429

CORROSION CONTROL FOR WATER SYSTEMS USING TIN CORROSION INHIBITOR WITH A HYDROXYCARBOXYLIC ACID

CHEMTREAT, INC, Glen All...

1. A method of suppressing corrosion of a corrodible metal surface that contacts a water stream in a water system, the method comprising:introducing into the water stream a treatment composition including a Tin(II) corrosion inhibitor and a hydroxycarboxylic acid promoter, the hydroxycarboxylic acid promoter having a carboxylic acid group and a hydroxyl group that is bonded to a carbon atom that is adjacent to the carboxylic acid group,
wherein the treatment composition is introduced so that a concentration of tin in the water stream is in the range of 0.1 to 1.25 ppm, and
the treatment composition is introduced so that a concentration of the promoter in the water stream is in the range of 7.5 ppm to 20 ppm.

US Pat. No. 10,694,592

METHODS OF PROTECTING FURNACE ELECTRODES WITH COOLING LIQUID THAT CONTAINS AN ADDITIVE

CHEMTREAT, INC., Glen Al...

1. A method for protecting a furnace electrode comprising:(i) mixing an antioxidant additive with electrode cooling water to form a chemically modified cooling liquid that includes at least 99 wt. % water, the antioxidant additive having a solubility in water of at least 1,000 mg/L;
(ii) while the furnace electrode is in service melting raw materials and a portion of the electrode is positioned inside a furnace and another portion of the electrode is positioned above the furnace, spraying at least a surface of the furnace electrode that is positioned above the furnace with the chemically modified cooling liquid at a flow rate of 0.25 m3/h to 10 m3/h, and
(iii) while the electrode is being sprayed with the chemically modified cooling liquid, forming a protective barrier on the furnace electrode, the protective barrier comprising the antioxidant additive that is applied on the surface of the furnace electrode as the chemically modified cooling liquid flows down the electrode and water evaporates from the chemically modified cooling liquid,
wherein the protective barrier is formed as a two-phase coating that includes (i) a first coating that comprises the antioxidant additive which has been applied on the furnace electrode from the chemically modified cooling liquid, the first coating being located on an upper portion of an exterior surface of the electrode that is above the furnace; and (ii) a second coating comprising the antioxidant additive in a molten state, the second coating being located on a lower portion of the exterior surface of the electrode that is inside the furnace.

US Pat. No. 10,471,165

STERILIZATION OR DISINFECTION OF WORKPIECES, INCLUDING MEDICAL AND DENTAL INSTRUMENTS

CHEMTREAT, INC., Glen Al...

1. A device for sterilizing or disinfecting a workpiece, the device comprising:a chamber defining an interior treatment space, the chamber being configured to be able to receive the workpiece when the chamber is opened and to be sealed when the chamber is closed;
a chlorine dioxide gas source that is configured to supply chlorine dioxide gas to the chamber when the chamber is closed, the chlorine dioxide gas source being further configured to generate the chlorine dioxide gas by contacting a dry chlorite reactant media with an ozone-containing gas,
wherein the device is configured to fill the interior treatment space with the chlorine dioxide gas when the chamber is closed at least until the chlorine dioxide concentration in the internal treatment space reaches a predetermined threshold concentration.

US Pat. No. 10,407,778

CORROSION INHIBITION FOR AQUEOUS SYSTEMS USING A HALOGENATED TRIAZOLE

CHEMTREAT, INC, Glen All...

1. A method of measuring a concentration of an ex-situ halogenated triazole compound in water of a water system, the method comprising:inducing the halogenated triazole compound to fluoresce;
measuring an intensity of fluorescence emitted from the water at a pH in a range of from 5 to 12; and
determining the concentration of the halogenated triazole compound in the water based on the measured intensity,
wherein the halogenated triazole comprises a triazole selected from the group consisting of benzotriazole, tolyltriazole, mercaptobenzothiazole, butylbenzotriazole, and salts thereof.
US Pat. No. 10,640,673

METHODS FOR MAINTAINING UNPAVED ROADS

CHEMTREAT, INC., Glen Al...

1. A method for maintaining an unpaved road, the method comprising:combining
(i) at least one of (A) an aqueous emulsion of an acrylamide polymer having 10 to 40 wt % of the acrylamide polymer and (B) an aqueous solution of the acrylamide polymer, with
(ii) water to form an aqueous composition comprising from 5 to 250 ppm of the acrylamide polymer; and
periodically applying the aqueous composition to a section of the unpaved road,
wherein the acrylamide polymer is a cationic or anionic acrylamide polymer having a molecular weight of from 2,000,000 g/mol to 10,000,000 g/mol.

US Pat. No. 10,214,459

CORROSION CONTROL METHODS FOR CORROSION-AGRESSIVE SOLUTIONS

CHEMTREAT, INC., Glen Al...

1. A method of preventing corrosion by a liquid solution of ammonium nitrate or urea ammonium nitrate, the method comprising:combining a stannous corrosion inhibitor composition with the liquid solution to provide a treated solution; and
contacting the treated solution with a metal surface of a container or conduit, wherein the treated solution has a pH of 6.0 or lower.

US Pat. No. 10,221,489

COMPOSITIONS AND METHODS FOR INHIBITING CORROSION IN HYDROSTATIC SYSTEMS

CHEMTREAT, INC, Glen All...

1. A method of inhibiting corrosion of a corrodible metal surface that contacts water and/or steam in a hydrostatic system, the method comprising:treating the hydrostatic system with a treatment composition including a liquid-phase corrosion inhibitor that includes a stannous compound,
wherein the treatment composition is provided in a sufficient amount and for a sufficient time to form a stable protective film on at least a portion of the corrodible metal surface, and
the corrodible metal surface is at least a portion of a surface of a metal container that is treated in the hydrostatic system.