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| Number | Title | Issue Date |
| 5670126 | Method for extracting antimony from elemental phosphorus A process for purifying elemental phosphorus, by dosing a multi-phase elemental phosphorus system, having an aqueous phase and an immiscible, elemental phosphorus phase containing antimony, with a conditioning agent selected from the group consisting of i... | 09/23/1997 |
| 5152902 | Polyaspartic acid as a calcium carbonate and a calcium phosphate inhibitor ଲ-Polyaspartic acid having a weight average molecular weight of 1000 to 5000 produced by hydrolysis of anhydropolyaspartic acid, exhibits a high degree of calcium carbonate and calcium phosphate inhibition.... | 10/06/1992 |
| 5116513 | Polyaspartic acid as a calcium sulfate and a barium sulfate inhibitor Polyaspartic acid as a calcium sulfate and barium sulfate inhibitor. Generally all forms of polyaspartic acid can be used. ଲ-polyaspartic acids are preferred.... | 05/26/1992 |
| 4869885 | Use of oil-soluble surfactants in flue gas desulfurization systems A method of improving the SO2 scrubbing efficiency of flue gas desulfurization scrubbers which comprises conducting the scrubbing operation in such scrubbers in the presence of an oil-soluble surfactant.... | 09/26/1989 |
| 4869846 | Fly ash utilization in flue gas desulfurization A carboxylic acid which has a pKa within the range of 2 to 7 and the ability to increase the effective alkalinity of fly ash for flue gas desulfurization. Carboxylic acid may be combined with adjuvants. Generally carboxylic acids with dispersan... | 09/26/1989 |
| 4868248 | Polyhydroxyamic acid polymers from polyacrylic acids Polyacrylic acid polymers are modified with hydroxylamine to convert a portion of the acrylic acid groups in the polymer to hydroxamic acid groups. The process requires utiization of a pH between 1-6 and a temperature ranging between 70°-150° C.... | 09/19/1989 |
| 4867757 | Lapping slurry compositions with improved lap rate A concentrated lapping composition having the following makeup: said lapping composition having its pH adjusted to greater than 8.5 in order to afford an improved lapping rate.... | 09/19/1989 |
| 4863615 | Cationic coagulants plus collidal silica for use in paint detackification Water soluble low molecular weight cationic polymeric coagulants in combination with colloidal silica are excellent paint detackification agents for treating paint spray booth waters which are contaminated with paint particles.... | 09/05/1989 |
| 4861492 | Method of dewatering sewage sludge particularly on recessed plate pressing equipment Method for dewatering sewage sludge with the aid of organic polymeric flocculating agents (polyelectrolytes) made preferably by emulsion polymerization. To obtain optimum dewatering results, a substantial amount of the aqueous phase of the sludge is remov... | 08/29/1989 |
| 4854947 | Paint detackification using oil-in-water emulsions from oily waste treatment plants A method of detackifying oversprayed paints chosen from the group consisting of high solids enamels, clear coats, two-phase urethane paints, and water or solvent borne base coats which comprises the contact of said oversprayed paint with an oil-in-water e... | 08/08/1989 |
| 4853140 | Lubricating fluids for slicing silicon ingots A lubricating composition for use in slicing or cutting silicon wafers. The composition includes a soap, a phosphorous containing compound, and an ethylene oxide-propylene oxide polymer. The phosphorous compound is a low temperature, extreme pressure lubr... | 08/01/1989 |
| 4851128 | Pulp mill waste color removal with carbon absorbents Carbon absorbents are used to remove color bodies from paper mill waste waters. A preferred embodiment of the process utilizes pretreatment of the paper mill waste waters with cationic flocculants.... | 07/25/1989 |
| 4846986 | Oil-in-water dry film prelube emulsion An oil-in-water emulsion useful as a metal working lubricant. The emulsion includes water, a oil-in-water emulsifier, a film plasticizer, and a boundry lubricant. A corrosion inhibitor may also be included.... | 07/11/1989 |
| 4845289 | Procedure for the removal or reduction of residual trimethylamine odor from its reaction products A process for the removal or reduction of residual trimethyl amine odor resulting from the quaternization of a halogen containing precursor with trimethyl amine. Odor reduction is achieved by reacting the residual trimethyl amine with at least an equivale... | 07/04/1989 |
| 4842716 | Ethylene furnace antifoulants An improved method for reducing fouling and corrosion of ethylene cracking furnaces petroleum feedstocks, the improvement comprising treating the petroleum feed stock with at least 10 ppm of a combination of a phosphorous antifoulant compound and a filmin... | 06/27/1989 |
| 4835332 | Use of triphenylphosphine as an ethylene furnace antifoulant Triphenylphosphine prevents fouling in ethylene furnaces.... | 05/30/1989 |
| 4828624 | Cement grinding aid compositions Cement clinkers are ground in an aqueous environment using as a grinding aid, a composition comprising:... | 05/09/1989 |
| 4827033 | naphthenic acid amides A naphthenic acid amide having the formula: ##STR1## where R is the hydrocarbon portion of a naphthenic acid, R1 is H or Me X is O or NH, and n is a number having the value of 1-10. The method of producing such amides is also disclosed.... | 05/02/1989 |
| 4820423 | Branched alkyl acrylamide types of polymer-zinc corrosion inhibitor 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 ... | 04/11/1989 |
| 4814092 | Centrifuge processing of spent emulsion from paint spray booths 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 su... | 03/21/1989 |
| 4806229 | Volatile amines for treating refinery overhead systems 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 boil... | 02/21/1989 |
| 4806665 | Preparation of silica sol 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 contai... | 02/21/1989 |
| 4802994 | Biocide treatment to control sulfate-reducing bacteria in industrial process waste waters 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.... | 02/07/1989 |
| 4802996 | Biocides for treating industrial waters, particularly flue gas desulfurization scrubber sludge Sulfate-reducing bacteria present in industrial waste waters can be controlled by using either the biocide glutaraldehyde or a blend of sodium dimethyldithiocarbamate and disodium ethylene bisdithiocarbamate.... | 02/07/1989 |
| 4800217 | Paint detackification A paint spray booth detackifying composition which includes mixtures of styrene-acrylate polymer and a melamine-formaldehyde polymer and the method of using same.... | 01/24/1989 |
| 4800235 | Synergistic biocide of 1,5-pentanedial and a mixture of N-alkyl dimethyl benzyl ammonium chloride and N-dialkyl methyl benzyl ammonium chloride 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.... | 01/24/1989 |
| 4800071 | Filtration aids for removal of calcium solids from aqueous phosphoric acid 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.... | 01/24/1989 |
| 4797224 | Branched alkyl acrylamide types of polymer-zinc corrosion inhibitor 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.... | 01/10/1989 |
| 4795574 | Low temperature breakers for gelled fracturing fluids A method of breaking gelled viscosities of oil-based gelled fracturing fluids used in low temperature formations having operating temperatures ranging between about 60°-120° F. which comprises treating said oil-based gelled fracturing fluids with an eff... | 01/03/1989 |
| 4795789 | Process for making acrylamido methane sulfonic acid polymers 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 bisu... | 01/03/1989 |
| 4795531 | Method for dewatering paper 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.... | 01/03/1989 |
| 4793982 | Use of nitrites to enhance SO2 removal in flue gas desulfurization wet scrubbers The SO2 scrubbing efficiency of flue gas desulfurization scrubbers is improved when the scrubbing is conducted in the presence of a water-soluble nitrite salt.... | 12/27/1988 |
| 4792406 | Method for dewatering a slurry using a twin belt press with cationic amine salts 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 de... | 12/20/1988 |
| 4792364 | Paint detackification 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.... | 12/20/1988 |
| 4786318 | Thickening of gold process slurries 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 %... | 11/22/1988 |
| 4786679 | Water-in-oil emulsions of amidase 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 wa... | 11/22/1988 |
| 4777231 | Process to produce water absorbent polymers 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 prote... | 10/11/1988 |
| 4776889 | Waxes as a black liquor viscosity modifier 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.... | 10/11/1988 |
| 4777219 | Carboxylate containing modified acrylamide polymers 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 --SO3 M, --PO3 M2, --COOR, ... | 10/11/1988 |
| 4771094 | Compositions for suspending solid particles in aqueous media A stable aqueous slurry of particles which comprises:... | 09/13/1988 |
