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| Number | Title | Issue Date |
| 4968394 | Method of reducing excess nitric acid in aqueous hydroxylamine nitrate solutions A process for reducing excess nitric acid in an aqueous hydroxylamine nitrate solution. The process is conducted by reacting the aqueous hydroxylamine nitrate solution with a basic neutralizing agent such as nitric oxide, hydroxylamine vapor or a mixture ... | 11/06/1990 |
| 4885316 | Substituted 5-amidotetrazoles as blowing agents in the production of cellular thermoplastic or rubber materials In a process for the production of cellular products comprising thermoplastic or rubber materials the blowing agents employed have the formula: ##STR1## wherein A represents NHX, NRR' or OR X represents H or a lower alkyl group, R represents a lower ... | 12/05/1989 |
| 4871861 | Substituted 5-amidotetrazoles In a process for the production of cellular products comprising thermoplastic or rubber materials the blowing agents employed have the formula: ##STR1## wherein A represents NHX, NRR' or OR X represents H or a lower alkyl group, R represents a lower ... | 10/03/1989 |
| 4871422 | Etching solutions containing ammonium fluoride and anionic sulfate esters of alkylphenol polyglycidol ethers and method of etching Etching solutions used to etch, for example, silicon dioxide coated substrates in the manufacture of integrated circuits comprise an aqueous solution of ammonium fluoride and a wetting amount of an anionic sulfate ester of alkylphenol polyglycidol ether. ... | 10/03/1989 |
| 4863563 | Etching solutions containing ammonium fluoride and a nonionic alkyl amine glycidol adduct and method of etching Etching solutions used to etch, for example, silicon dioxide coated substrates in the manufacture of integrated circuits comprise an aqueous solution of ammonium fluoride and a wetting amount of a nonionic alkyl amine glycidol adduct. Preferred embodiment... | 09/05/1989 |
| 4851125 | Process for concentrating aqueous solutions of hydroxylammonium salts Concentrated solutions of inorganic hydroxylammonium salts can safely be produced in a process for concentrating a dilute solution of an inorganic hydroxylammonium salt by contact with a membrane having a sorption side and a desorption side. The process c... | 07/25/1989 |
| 4849073 | Direct electrochemical reduction of nitric acid to hydroxylamine nitrate A solution of hydroxylamine nitrate is electrolytically produced in an electrochemical cell having a cathode compartment, an anode compartment, and a separator between the cathode compartment and the anode compartment. The process comprises feeding a cath... | 07/18/1989 |
| 4842841 | Continuous process for producing granular calcium hypochlorite particles A continuous process for producing granular calcium hypochlorite particles comprises admixing lime and an aqueous liquid in a mixing zone to form a lime slurry. The lime slurry is fed into a crystallizing zone along with a calcium hypochlorite-containing ... | 06/27/1989 |
| 4830837 | Process for removing aluminum from concentrated alkali metal halide brines A process for purifying an alkali metal halide brine containing aluminum as an impurity which comprises adjusting the pH of the alkali metal halide brine to the range of from about 8.5 to about 9.5 and contacting the alkali metal halide brine with an ion ... | 05/16/1989 |
| 4810483 | Process for producing anhydrous alkali metal hydrosulfites A process for producing an anhydrous alkali metal hydrosulfite comprises contacting hydrate crystals of an alkali metal hydrosulfite with an alkaline aqueous solution of a dehydrating agent having a pH of at least about 7. The slurry formed is maintained ... | 03/07/1989 |
| 4804442 | Ultrapure hydrazine production Ultrapure or anhydrous hydrazine is produced in a process which comprises distilling aqueous solutions of hydrazine having at least 70 percent by weight of N2 H4 at pressures below about 20 millimeters. Aqueous solutions of hydrazine... | 02/14/1989 |
| 4793906 | Electrochemical process for producing hydrosulfite solutions A process for the electrochemical production of an alkali metal hydrosulfite by the reduction of an alkali metal bisulfite component of a circulated aqueous catholyte solution in an electrolytic membrane cell having a cathode compartment, a porous cathode... | 12/27/1988 |
| 4780398 | Bleaching composition and process for color photographic materials A bleaching composition for color photographic materials consists essentially of an aqueous solution containing a complex of ferric ion and an aminopolycarboxylic acid or salt thereof; a mercapto-substituted 5-membered heterocyclic nitrogen compound havin... | 10/25/1988 |
| 4780216 | Calcium hypochlorite sanitizing compositions A sanitizing composition consisting essentially of a mixture of a calcium hypochlorite compound and a peroxydisulfate compound having the formula: Mx S2 O8 where M is an alkali metal or alkaline earth metal, and x is 1 or ... | 10/25/1988 |
| 4774266 | N-substituted 5-phenyltetrazoles as high temperature blowing agents A process for the production of cellular products which comprises incorporating a blowing agent into rubber or a thermoplastic material uses as the blowing agent a tetrazole compound represented by the formula: ##STR1## in which R represents an alkyl... | 09/27/1988 |
| 4761244 | Etching solutions containing ammonium fluoride and an alkyl polyaccharide surfactant Etching solutions used to etch, for example, silicon dioxide coated substrates in the manufacture of integrated circuits comprise an aqueous solution of ammonium fluoride and a wetting amount of a nonionic alkyl polysaccharide having the formula: wherein ... | 08/02/1988 |
| 4761245 | Etching solutions containing ammonium fluoride and an alkylphenol polyglycidol ether surfactant Etching solutions used to etch, for example, silicon dioxide coated substrates in the manufacture of integrated circuits comprise an aqueous solution of ammonium fluoride and a wetting amount of a nonionic alkylphenol polyglycidol ether having the formula... | 08/02/1988 |
| 4747917 | Scale-free process for purifying concentrated alkali metal halide brines containing sulfate ions as an impurity A process for reducing sulfate ion concentrations in an alkali metal halide brine to be electrolyzed in an electrolytic cell comprises feeding the alkali metal halide brines to a reaction zone containing a slurry of gypsum crystals having a concentration ... | 05/31/1988 |
| 4744917 | Toxic chemical agent decontamination emulsions, their preparation and application A calcium hypochlorite-containing emulsion having an emulsifying agent which comprises an oil soluble ethylene oxide adduct of an alkylphenol having from about 4 to about 7 moles of ethylene oxide and an oil soluble alkyl aryl sulfonate in a chlorinated o... | 05/17/1988 |
| 4584139 | Hydrogenation of long chain olefinic oils with Raney catalyst An improved monolithic hydrogenation catalyst and processes for using same to hydrogenate animal and vegetable oils, said catalyst being comprised of a Raney metal alloy surface layer integral with and derived from a selected nickel alloy monolithic subst... | 04/22/1986 |
| 4574075 | Purification of alkali metal nitrates A process is disclosed for removing heavy metal contaminants from impure alkali metal nitrates containing them. The process comprises mixing the impure nitrates with sufficient water to form a concentrated aqueous solution of the impure nitrates, adjustin... | 03/04/1986 |
| 4568352 | Alkali metal nitrate purification A process is disclosed for removing contaminants from impure alkali metal nitrates containing them. The process comprises heating the impure alkali metal nitrates in solution form or molten form at a temperature and for a time sufficient to effect precipi... | 02/04/1986 |
| 4542218 | Method of halogenating isocyanuric acid An improved method for reacting a gas with a liquid medium and an improved reactor therefore is described. In this method, gas is fed to the liquid medium in an agitated reactor through a plurality of sparger means which are positioned in the horizontal c... | 09/17/1985 |
| 4521325 | Selected N,1-disubstituted hydrazinecarboxamides and their use as antioxidants Disclosed are selected N,1-disubstituted hydrazinecarboxamides having the formula ##STR1## wherein R1 is selected from the group consisting of alkyl containing from 1 to about 20 carbon atoms, aromatic containing from about 6 to about ... | 06/04/1985 |
| 4518457 | Raney alloy coated cathode for chlor-alkali cells An improved cathode with a conductive metal core and a Raney-type catalytic surface predominantly derived from an adherent Beta nickel (NiAl3) crystalline precursory outer portion of the metal core is disclosed. The precursory outer portion pre... | 05/21/1985 |
| 4517164 | Purification of alkali metal nitrates A process is disclosed for removing heavy metal contaminants from impure alkali metal nitrates containing them. The process comprises mixing the impure nitrates with sufficient water to form a concentrated aqueous solution of the impure nitrates, adjustin... | 05/14/1985 |
| 4513149 | Raney nickel alloy expanded mesh hydrogenation catalysts Hydrogenation processes utilizing improved Raney nickel alloy catalysts are disclosed. The catalyst comprises a monolithic mesh type structure of a nickel alloy having an integral Beta phase Raney Nix M1-x coating on its outer surfac... | 04/23/1985 |
| 4503251 | Raney nickel catalysis of aromatic amines Hydrogenation processes utilizing improved Raney nickel alloy catalysts are disclosed. The catalyst comprises a monolithic mesh type structure of a nickel alloy having an integral Beta phase Raney Nix M1-x coating on its outer surfac... | 03/05/1985 |
| 4498921 | Trichloroisocyanuric acid composition Water sanitizing compositions are disclosed which are comprised of a mixture of trichloroisocyanuric acid and an alkaline earth metal solubility promoting additive selected from the group consisting of the bicarbonate, carbonate, hydroxide, oxide and mixt... | 02/12/1985 |
| 4491564 | Reactor containing a methanation catalyst A methanation reactor utilizing an improved catalyst for the conversion of CO, CO2 and mixtures thereof to CH4 is disclosed. The catalyst comprises a monolithic mesh type structure of a nickel alloy having an integral Beta phase Rane... | 01/01/1985 |
| 4489503 | Process for drying wet particles of available halogen compounds A process for drying wet particles of an available halogen compound which comprises: a. forming a substantially vertical circulating bed of dried particles of said available halogen compound suspended in a heated gas in a circular annular zone, said zone ... | 12/25/1984 |
| 4482753 | Catalyst for use in the hydrogenolysis of methyl glycol formals The composition of and method for preparing a novel catalyst is disclosed for use in the hydrogenolysis of methyl glycol formals. The novel catalyst is prepared by impregnating a porous alumina substrate with a solution of compounds of nickel and rutheniu... | 11/13/1984 |
| 4472187 | Rapidly dissolving trichloroisocyanuric acid compositions Water sanitizing compositions are disclosed which are comprised of a mixture of trichloroisocyanuric acid and an alkaline earth metal solubility promoting additive selected from the group consisting of the bicarbonate, carbonate, hydroxide, oxide and mixt... | 09/18/1984 |
| 4466868 | Electrolytic cell with improved hydrogen evolution cathode An electrolytic cell having an improved hydrogen evolution cathode, said cathode being characterized by a conductive metal core and an integral Raney-type catalytic surface predominantly derived from an adherent ternary aluminide Beta structured intermeta... | 08/21/1984 |
| 4422900 | Spray drying apparatus for available chlorine-containing compounds Granular particles of an available chlorine-containing compound such as sodium dichloroisocyanurate are prepared by conveying a flowing stream of an aqueous slurry of the compound through a tubular chamber under pressure, injecting jets of an atomizing me... | 12/27/1983 |
| 4374985 | Hydrated alkali metal dichloroisocyanurate and its production Hydrated alkali metal dichloroisocyanurate particles are prepared in a process which comprises, in a first step, spraying droplets of an aqueous slurry of alkali metal dichloroisocyanurate into an evaporation zone fed with a moving stream of heated gas to... | 02/22/1983 |
| 4333913 | Method of purifying aqueous solutions of metal hydroxides A process is disclosed for purifying aqueous solutions of metal hydroxides. An aqueous solution of a metal hydroxide, such as sodium hydroxide, containing a complex of a heavy metal contaminant, such as mercury, is heated. An oxidizing agent, such as hydrogen ... | 06/08/1982 |
| 4302206 | Apparatus and process for analysis of gaseous nitrogen trichloride Apparatus and process for analyzing the nitrogen trichloride concentration in gases containing it utilizing an ultraviolet light source. Unabsorbed filtered light collected from the sample at a wavelength of about 218 nm is compared with a standard at a w... | 11/24/1981 |
| 4292159 | Cell having in situ reduction of electrode overvoltage A method and apparatus for in situ reduction of cathode overvoltage in electrolytic cells. The method involves introducing low overvoltage or noble metal ions into the catholyte solution and plating those ions on the cathode in situ. The apparatus include... | 09/29/1981 |
| 4289650 | Cathode for chlor-alkali cells An improved cathode with a conductive metal core and a Raney-type catalytic surface predominantly derived from an adherent ternary aluminide intermetallic crystalline precursory outer portion of the metal core is disclosed. The precursory outer portion pr... | 09/15/1981 |
