Abstract: A method for the control of pitch in an aqueous system used in pulp or paper making is disclosed which comprises adding to the system, or to the pulp making or paper making machinery, a water soluble polymer derived from (a) an epihalohydrin, a diepoxide or a precursor of an epihalohydrin or diepoxide, (b) an alkyl amine having a functionality with respect to an epihalohydrin of 2 and (c) an amine which has a functionality with respect to an epihalohydrin greater than 2 and which does not possess any carbonyl groups.

Abstract: A method is disclosed for inhibiting or preventing the formation of scale on surfaces in contact with an aqueous system comprising adding to the system an amount effective to inhibit scale formation of a sulfonated organophosphonate compound having the formula: ##STR1## wherein n is an integer from 3 to 10 X is OH or NH.sub.2 ; and water soluble salts thereof.

Abstract: A composition and process for preventing the deposition of scale and sludge in aqueous systems comprising adding to the system the combination of three or more additives selected from the group consisting of a) polyacrylic acid, copolymer of allylsulfonate and maleic anhydride and mixtures thereof, b) hydroxyethylidene diphosphonic acid, amino (trimethyl phosphonic acid), diethylenetriamine pentaacetic acid, and mixtures thereof, and c) copolymer of styrene sulfonate and maleic anhydride, copolymer of acrylic acid and acrylamide, poly(acrylic acid-co-hypophosphite) and mixtures thereof, and wherein the combination contains at least one additive selected from each of a), b) and c).

Abstract: A process for preventing or removing calcium and rust scale deposits from surfaces which are in contact with aqueous systems comprising adding to the aqueous system 3,5-bis(di-N,N-(carboxymethyl)aminomethyl)-4-hydroxybenzenesulfonic acid in an amount effective to remove the scale and rust deposits.

Abstract: A composition and method for inhibiting corrosion of ferrous metals in contact with an aqueous solution comprising adding to the system from 0.1 to 500 ppm of an aminohydroxysuccinic acid compound selected from group consisting of compounds of the generalized formulas: ##STR1## wherein R is H or C.sub.1 to C.sub.6 alkyl, optionally substituted with --OH, --CO.sub.2 H, --SO.sub.3 H or phenyl, C.sub.4 C.sub.7 cycloalkyl, or phenyl which is optionally substituted with --OH, or --CO.sub.2 H, and R' is H, C.sub.1 to C.sub.6 alkyl, optionally substituted with --OH or CO.sub.2 H; and ##STR2## wherein R' is as above, and Z is selected from the group consisting of i) --(CH.sub.2).sub.n -- wherein n is an integer from 2 to 10, ii) --(CH.sub.2).sub.2 --X--(CH.sub.2).sub.2 -- wherein X is --O--, --S--, --NR"--; wherein R" is selected from the group consisting of H, C.sub.1 to C.sub.6 alkyl, hydroxyalkyl, carboxyallkyl, acyl, --C(O)OR"' wherein R"' is C.sub.1 C.sub.

Abstract: A method of comprising iron in an aqueous system comprising adding to the system a copolymer of styrene sulfonic acid and methacrylic acid or its water soluble salt in an amount effective to disperse the iron contained therein.

Abstract: A composition and method of inhibiting corrosion in boiler-steam condensate systems comprising adding to the system N,N-dihydrocarbylhydroxylamine and N-hydrocarbylhydroxylamine in amounts effective to inhibit corrosion.

Abstract: The present invention is directed to a method of inhibiting corrosion in aqueous systems which employ amino acid chelants in concentrations which are corrosive to the metal surfaces in contact with the aqueous system. The method comprises adding to the system a corrosion inhibiting amount of 1-hydroxyethane-1,1-diphosphonic acid (HEDPA). The corrosion inhibiting amount is generally in the range of from 0.5% to 10% on the basis of the concentration of amino acid chelant in the system.

Abstract: This invention relates to a novel composition for breaking oil in water emulsions. More specifically, this invention relates to a cationic quaternary ammonium modified blend of a starch and a natural gum, which is effective at breaking oil in water emulsions.

Abstract: This invention relates to controlling corrosion in aqueous systems and more particularly to using certain calcium insensitive phosphonomethyl amine oxide compounds. The compounds of this invention are water soluble phosphonomethyl amine oxides having at least one oxidized tertiary amine group of the formula: ##STR1## and water soluble salts thereof and having a cloud point of at least about 25 ppm.

Abstract: A composition useful for treating aqueous systems comprising a naphthylamine polycarboxylic acid having the formula: ##STR1## wherein X is CO.sub.2 H or SO.sub.3 H, Y is H, C.sub.1 to C.sub.6 alkyl, CO.sub.2 H or SO.sub.3 H, R is H, C.sub.1 to C.sub.6 alkyl, CO.sub.2 R' or COR', R' is C.sub.1 to C.sub.6 alkyl, n is an integer from 1 to 20, and water soluble salts thereof.

Abstract: A method is disclosed for inhibiting corrosion of a ferrous based metal in contact with an aqueous system comprising incorporating into the aqueous system an effective amount of a substituted carboxymethoxysuccinic acid selected from the group consisting of compounds having the formula: ##STR1## wherein R is --(CHOH).sub.n CH.sub.2 OH, --(CHOH).sub.m CO.sub.2 H or --(CHOH).sub.r (CHOR')CO.sub.2 H and R' is CH(CO.sub.2 H)CH.sub.2 CO.sub.2 H; n is 1,2,3 or 4; m is 1,2,3, or 4; r is 1,2, or 3; and water soluble salts thereof.

Abstract: A method of inhibiting corrosion of a metal surface in an aqueous system having a pH of at least 6, comprising maintaining in the aqueous system, in an amount effective to inhibit corrosion, a water-soluble, organic-rare earth metal chelate which is derived from a rare earth metal having an atomic number from 57 to 71 and an organic chelant. The organic chelant provides not only water solubility but surprisingly enhanced corrosion inhibiting activity. The water-soluble, organic-rare earth chelates may be advantageously combined with other corrosion inhibitors such as zinc chelates, organophosphonates, phosphates, chromates, molybdates, and the like.

Abstract: This invention relates to a method of inhibiting scale formation in aqueous systems wherein allylphosphonate copolymers are added to the system in an amount effective to inhibit scale formation. The allylphosphonate copolymers of this invention exhibit characteristic properties for the treatment of aqueous systems, namely strong calcium complexation, excellent iron dispersion, inhibition of calcium carbonate scale and inhibition of calcium phosphate deposition.

Abstract: The present invention is directed to a combination of two types of biocidal materials that give rise to synergistic effects against microorganisms in aqueous systems such that the extent to which the microorganisms are killed exceeds that which one would expect from using the sum of the individual components of the composition. More specifically, this invention is directed to a combination comprising 2-(decylthio)ethaneamine and 1,2-dibromo-2,4-dicyanobutane in an amount effective to inhibit microbial growth. This combination has proven to be particularly effective in inhibiting the growth of Enterobacter aerogenes ATCC 13048 in aqueous systems.

Abstract: A method for treating an aqueous system is disclosed which comprises incorporating therein a water soluble organic sulphonate copolymer and an optionally N-substituted water soluble copolymer of acrylamide or methacrylamide and a copolymerizable monomer.

Abstract: An improved flatting agent comprising an inorganic hydrogel having a pore volume of at least 1.0 ml/g, an average particle size in the range 1 to 10 microns, and a particle size distribution such thatt when the flatting agent is dispersed in a coating, the fineness of grind is at least 4.75 on the Hegman scale. The inorganic hydrogel flatting agents of this invention are prepared by milling an inorganic hydrogel under controlled temperature conditions wherein a volatiles content of at least 40 weight percnet is maintained, to produce inorganic hydrogel particles characterized by a pore volume of at least 1.0 ml/g, an average particle size in the range of 1 to 10 microns, and a particle size distribution such that when the flatting agent is dispersed in a coating, the fineness of grind is at least 4.75 on the Hegman scale.

Abstract: This invention relates to controlling scale formation in aqueous systems and more particularly to using certain calcium insensitive phosphonomethyl amine oxide compounds having at least one oxidized tertiary amine group of the formula: ##STR1## and water soluble salts thereof.

Abstract: A method for the treatment of an aqueous system, typically hard water in a cooling system, is described which comprises adding thereto:(i) a phosphonocarboxylic acid which contains at least 3 acid groups which are carboxylic and phosphonic acid groups, such that at least one acid group is a carboxylic acid group and at least one acid group is a phosphonic acid group, at least the said 3 acid groups being attached to carbon atoms, or a water-soluble salt thereof,(ii) an amino phosphonic acid having the formula:H.sub.2 --PO.sub.3 (CH.sub.2).sub.n --N(R.sub.1)(R.sub.2)in which R.sub.1 and R.sub.2 independently represent hydrogen, alkyl, especially of 1 to 4 carbon atoms, --(CH.sub.2).sub.n PO.sub.3 H.sub.2, or --(CH.sub.2).sub.n COOH, and n is 1 or 2, or a water-soluble salt thereof, and(iii) an aminophosphonic acid oxide of the formula:H.sub.2 --PO.sub.2 (CH.sub.3).sub.n --N.fwdarw.O)(R.sub.1)(R.sub.2)in which R.sub.1, R.sub.2 and n are as defined above, or a water-soluble salt thereof.

Abstract: This invention relates to water-soluble allylphosphonate copolymers which are useful for treating aqueous systems. The allylphosphonate copolymers are characterized as having the formula: ##STR1## wherein the molar percentage of x in the copolymer is from 1 to 90 percent, the molar percentage of y in the copolymer is from 10 to 99 percent, and the total of x and y being 100 percent; and wherein each R.sup.1 is independently selected from the group consisting of hydrogen, lower alkyl groups having from 1 to about 4 carbon atoms and a salt forming cation, R.sup.2 and R.sup.3 are independently selected from the group consisting of hydrogen, halogen, COOH, CH.sub.2 COOH, lower alkyl groups having from 1 to about 4 carbon atoms, and phenyl, and A is selected from the group consisting of COOH, CH.sub.2 COOH, .phi.COOH, SO.sub.3 H, CH.sub.2 SO.sub.3 H, CH(CH.sub.3)SO.sub.3 H, CH.sub.2 OCH.sub.2 CH(OH)CH.sub.2 SO.sub.3 H, .phi.-SO.sub.3 H, ##STR2## wherein n=2 to 4, CONH.sub.2, CONHCHH.sub.3, CON(CH.sub.3).sub.