Abstract: A method of preventing corrosion and scale formation on metals exposed to industrial recirculating waters having a pH ranging between about 7.0 to about 9.5, which consists essentially of adding to said industrial recirculating waters an effective amount of a combination of a water-soluble zinc salt, a nitrogen-containing N-alkylated acrylamide zinc complexing polymer and an orthophosphate ion source, wherein:(a) the weight ratio of zinc to nitrogen-containing zinc complexing polymer ranges between 1:1 to about 1:20;(b) the nitrogen-containing N-alkylated acrylamide zinc complexing polymer has a weight average molecular weight ranging between 2,000 to 25,000 and is selected form the group consisting of water-soluble copolymers and terpolymers containing at least two mole percent of an N-alkylated acrylamide monomer, wherein the nitrogen substituted alkyl group contains from 3-12 carbon atoms and wherein the N-alkyl group may be linear or branched.

Abstract: In a process for removal of detackified oversprayed paint particles from paint spray booths of the type comprising a chamber, means for passing a wash stream capturing oversprayed paint particles across a liquid curtain and down through said chamber, a sump located at the bottom of said chamber and containing a circulating oil-in-water emulsion receiving said oversprayed paint particles from said wash stream, said oil-in-water emulsion comprised of:(a) 1-50 weight percent of an organic liquid having a boiling point of at least 150.degree. C.,(b) 0.1-30 weight percent, based on the organic liquid, of an oil-in-water emulsifier,(c) the balance, water, andsaid emulsion having a pH ranging between about 7.5-12.

Abstract: A process for substantially neutralizing the volatile acid gases and water present in the condensate of a distilling pertroleum product which comprises treating the distilling product prior to the condensation thereof with at least one amine having a boiling point below 95.degree. C.

Abstract: A method for producing a silica sol containing less than 200 ppm sodium having an average particle size of 2-110 nm, and a particle size distribution with a coefficient dispersion of 0.16-0.4. The silica sols are produced using a lower alkanolamine containing heal to which aliquots of silicic acid are added. The aliquots are added to maintain a substantially constant concentration of colloidal silica in the product. Subsequent to production, the sol may be concentrated by ultrafiltration.Preparation of low sodium silica sol utilizing a constant silica technique by heating the initial heel to 94.degree..+-.4.degree. C. and adding additional silica maintaining constant total silica. The stabilization is effected with an alkanolamine.

Abstract: Sulfate-reducing bacteria present in industrial waste waters can be controlled by using hydrogen peroxide in combination with non-oxidizing organic biocides known to be effective against sulfate-reducing bacteria.

Abstract: A paint spray booth detackifying composition which includes mixtures of styrene-acrylate polymer and a melamine-formaldehyde polymer and the method of using same.

Abstract: The invention is a synergistic biocide comprising a blend of 1,5-pentanedial and a mixture of N-alkyl dimethyl benzyl ammonium chloride and N-dialkyl methyl benzyl ammonium chloride.

Abstract: Separation of gypsum from phosphoric acid liquor produced during the production of phosphoric acid from finely ground phosphate rock. These aids are characterized as containing sulfonate and acrylamide.

Abstract: Water-soluble zinc:polymer complexes of nitrogen-containing polymers are useful in preventing corrosion in aqueous recirculating systems operating within the pH range of 7.0-9.5, when combined with orthophosphate ion sources.

Abstract: A method of enhancing the dewatering of paper during the papermaking process which includes adding a low molecular weight cationic coagulant and then colloidal silica and a high molecular weight flocculant.

Abstract: A method of introducing acrylamido methane sulfonic acid groups into acrylic acid or methacrylic acid polymers which comprises reacting the carboxylic acid groups in such polymers with from 2-100 mole % of an ammonia, formaldehyde and a water-soluble bisulfite mixture.

Abstract: A method of breaking gelled viscosities of oil-based gelled fracturing fluids used in low temperature formations having operating temperatures ranging between about 60.degree.-120.degree. F. which comprises treating said oil-based gelled fracturing fluids with an effective amount of a chemical breaker consisting essentially of an effective admixture of hydrated lime and sodium bicarbonate.

Abstract: The SO.sub.2 scrubbing efficiency of flue gas desulfurization scrubbers is improved when the scrubbing is conducted in the presence of a water-soluble nitrite salt.

Abstract: A method for dewatering a slurry of solid particles suspended in a liquid using a twin belt press dewatering system, comprising the following steps:feeding the slurry of solid particles into the dewatering system;feeding a cationic amine salt solution into the dewatering system at a point just prior to the mixing drum, the cationic amine salt being a latex copolymer of acrylamide and dimethylaminoethylmethacrylate sulfuric acid salt having a mole ratio in the range between about 30:70 to 70:30, preferably 53:47;mixing the cationic amine salt solution with the slurry of solid particles in the mixing drum; andfeeding the cationic amine salt solution/slurry mixture to the twin belt press, whereby the slurry of solid particles is dewatered. The cationic amine salt solution having a strength of less than 1% and a polymer concentration of about 35%.

Abstract: A paint spray booth detackifying composition which includes mixtures of; melamine-formaldehyde polymers and polyvinyl alcohol polymers; and mixtures of melamine-formaldahyde polymer, polyvinyl alcohol polymer and styrene-acrylate polymer.

Abstract: A process for thickening gold ore slurries or slimes for gold purification which comprises adding to such gold ore slimes an effective amount of flocculant comprising a terpolymer containing 5-35 mole % 2-AMPS, 5-45 mole % sodium acrylate and 50-90 mole % acrylamide, said terpolymer having an RSV of at least 20.

Abstract: A water-in-oil emulsion, the aqueous phase of which contains Amidase. An improved method of treating water-in-oil emulsions of acrylamide polymers with Amidase to reduce the acrylamide content thereof which comprises adding the Amidase in the form of a water-in-oil emulsion.

Abstract: Black liquor is rendered more pumpable by reducing its viscosity by adding to the black liquor at least a part per million of a wax based on the solids present in the black liquor.

Abstract: A water-in-oil suspension polymerization process of the type comprising a process for preparing a water-insoluble polymer capable of absorbing water, aqueous salt solutions and blood, which utilizes as the suspending agent a cellulose ester or ether protective colloid, the improvement which comprises using as the protective colloid an oil-soluble, water-insoluble, polymeric surfactant instead of the cellulose derivatives, in an amount sufficient to stabilize the emulsion, said polymeric surfactant having the formula: ##STR1## wherein x is a whole number greater than about 5, the mole ratio of a:b is from 3:1 to 1:3, provided the HLB number is maintained at less than about 14, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently selected from the group consisting of hydrogen, alkyl (C.sub.1-16), aryl (C.sub.6-12), alkaryl (C.sub.7-12), and R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are such that the surfactant is oil-soluble and water-insoluble.

Abstract: A high temperature, pressurized process is described to synthesize substituted carboxylated modified acrylamide polymers represented by the structure: ##STR1## wherein X is from the group --SO.sub.3 M, --PO.sub.3 M.sub.2, --COOR, --OR, ##STR2## and mixtures thereof.