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| Number | Title | Issue Date |
| 6451276 | Recovery of elemental phosphorus from phosphorus sludge Disclosed is a method of recovering elemental phosphorus from a sludge that contains water, dirt, and elemental phosphorus. In the first step, the sludge is melted. A mixture is formed of the melted sludge and about 0.5 to about 5 wt % of an oxidizing age... | 09/17/2002 |
| 6313337 | Method of making benzoyl halides and nitriles A method of making a benzoyl halide is disclosed. Into a reactor is placed a reaction mixture of a benzotrihalide and a benzaldehyde having the respective general formulas ##STR1## where each A is independently selected from halogen, CF3, R, or... | 11/06/2001 |
| 6303812 | Isolation of products from selective dehalogenation of haloaromatics Disclosed is a method of isolating the aromatic product formed when a substrate having the general formula ##STR1## is dehalogenated, forming a product mixture of copper salts and aromatic product, where X is the halogen removed from the substrate to form... | 10/16/2001 |
| 6300427 | Inhibiting scale in vinyl monomer polymerization Disclosed is a method of inhibiting the formation of scale on reactor surfaces in contact with a polymerizing vinyl monomer comprising contacting said monomer with a terpolymer which comprises the condensation reaction product of (A) an aromatic compound ... | 10/09/2001 |
| 6284934 | Reducing meta content of isomeric mixtures of halo substituted alkylbenzenes Disclosed is a method of separating the meta isomer of a haloalkylbenzene having the general formula ##STR1## from a mixture with at least one other isomer, where X is Cl or Br and R is alkyl from C2 to C12 or cycloalkyl from C3... | 09/04/2001 |
| 6276825 | Transportation of soluble solids Disclosed is an agitator assembly which comprises an agitator and means for mounting the agitator assembly on top of a tank. The agitator comprises a shaft, a propeller fixed to one end of the shaft, and means for rotating the shaft to provide an axial di... | 08/21/2001 |
| 6258910 | Polymerizing vinyl chloride in carbon dioxide Disclosed is a method of polymerizing vinyl chloride or vinylidene chloride monomer. A mixture is prepared of (1) a monomer selected from the group consisting of vinyl chloride, vinylidene chloride, and mixtures thereof with up to about 20 wt % of a comon... | 07/10/2001 |
| 6225514 | Ring halogenation of aromatic compounds Disclosed is a method of halogenating the ring of an aromatic compound. The aromatic compound is contacted with a halogenating agent in the presence of a heterogeneous catalyst. The catalyst is the calcination reaction product of: (A) 51 to 99 wt % of a s... | 05/01/2001 |
| 6222079 | Method of increasing certain isomeric ratios in chlorinating substituted benzenes Disclosed is a method of increasing the percentage of certain isomers made when di or tri-substituted benzenes are chlorinated in the presence of a Friedel-Crafts catalyst. The use of about 0.001 to about 1 wt % a cocatalyst during chlorination alters the... | 04/24/2001 |
| 6222078 | Method of making -chloro-,-difluoro aromatic compounds Disclosed is a method of making an -chloro-,-difluoro aromatic compound. An ,,-trichloro aromatic compound having the general formula ##STR1## where Y is C or N, R is halogen, R', amino, NHR', NR'2, OR'... | 04/24/2001 |
| 6218486 | Method of polymerizing vinyl chloride monomer using an organocobalt (III) catalyst Disclosed is a method of polymerizing vinyl chloride monomer using a catalyst having the general formula ##STR1## where L is a ligand covalently bonded to the cobalt atom, each D is independently selected from donor ligands, R is hydrogen, hydrocarbon fro... | 04/17/2001 |
| 6207177 | Monosodium cyanuric acid slurry Disclosed is a stable gel-like slurry having a pH of about 6.5 to about 8.5 which is a mixture of water and about 20 to about 50 wt % sodium cyanurate. Also disclosed is a method of making a water-monosodium cyanurate hydrate gel-like slurry. A slurry is ... | 03/27/2001 |
| 6201152 | Method of making 3,5-dichloro-p-toluoyl chloride Disclosed is a method of making 3,5-dichloro-p-toluoyl chloride. A mixture is prepared of methyl-3,5-dichloro-4-methylbenzoate, about 1 to about 1.4 equivalents of an ,,-trichloromethylbenzene, and about 0.01 to about 0.2 equivalents ... | 03/13/2001 |
| 6174415 | Chlorinating side chains of aromatic compounds Disclosed is a method of chlorinating the side chains of an aromatic compound having the general formula ##STR1## where each R is independently selected from R' or OR', each R' is independently selected from alkyl from C1 to C6, and ... | 01/16/2001 |
| 6171569 | Method of eliminating malodors from gases Disclosed is a method of eliminating the odor from a malodorous gas, where the odor is due to the presence of a C10 to C18 fatty acid in the gas. An aqueous solution containing at least a stoichiometric amount of a base that reacts w... | 01/09/2001 |
| 6165426 | Method of purifying liquid products by removing soluble antimony compounds therefrom Disclosed is a method of removing a soluble antimony compound from a liquid in which it is dissolved. The liquid is contacted with a hydrated compound, particularly a hydrated compound that forms carbonate ions, bicarbonate ions, or both in the liquid, su... | 12/26/2000 |
| 6166272 | Molybdenum trioxide catalyzed fluorination reactions Disclosed is a method of fluorinating a substrate having the general formula ##STR1## where each R is independently selected from halogen, alkyl from C1 to C12, aryl from C6 to C12, alkoxide from C1 | 12/26/2000 |
| 6162952 | Production of mercaptans using heterogeneous acidic catalysts Disclosed is a method of making a mercaptan by reacting hydrogen sulfide with an olefin in the presence of a heterogeneous acidic catalyst. The catalyst can be made by calcining a mixture of a hydroxide, such as Zr(OH)4 or Ti(OH)4, w... | 12/19/2000 |
| 6156945 | Method of making high purity 2,4- and 3,4-dichlorotoluene Disclosed is a method of making high purity 2,4- and 3,4-dichlorotoluene from parachlorotoluene that contains some metachlorotoluene. About 0.0001 to about 5 wt % of a Friedel-Crafts catalyst and about 0.5 to about 10 equivalents of a brominating agent ar... | 12/05/2000 |
| 6156820 | Polyamideimidesiloxane hot melt adhesive Disclosed is a solution of a hot melt adhesive which comprises an organic solvent and a fully imidized polyamideimidesiloxane. The polyamideimidesiloxane is the reaction product of dianhydride monomer with diamine monomer. About 0.5 to about 30 mole % of ... | 12/05/2000 |
| 6156185 | Reactivation of deactivated anodes Disclosed is a method of reactivating a deactivated anode that has a coating of a noble metal or noble metal oxide on a substrate. A coating of a noble metal is deposited on the anode electrolessly. The noble metal in the deposited coating can be platinum... | 12/05/2000 |
| 6153810 | Highly selective process for making o-arylbenzonitriles Disclosed is a method of making an o-arylbenzonitrile by reacting o-chlorobenzonitrile with a substituted phenylzinc halide. The reaction is performed in the presence of a nickel catalyst, an ethereal solvent, and N-methylpyrrolidinone as a cosolvent.... | 11/28/2000 |
| 6124512 | Ring halogenation of aromatic compounds Disclosed is a method of halogenating the ring of an aromatic compound. The aromatic compound is contacted with a halogenating agent in the presence of a heterogeneous catalyst. The catalyst is the calcination reaction product of: (A) 51 to 99 wt % of a s... | 09/26/2000 |
| 6117278 | Method of making -chloroxylenes Disclosed is a method for making high purity -chloroxylenes. A composition is formed of about 15 to about 80 wt % of a xylene and about 20 to about 85 wt % of a solvent. The solvent can be toluene, ring halogenated toluene, benzotrichloride, ring h... | 09/12/2000 |
| 5985226 | Method of recovering chlorine from a gas mixture Disclosed is a process for separating chlorine gas from a mixture of gases. The mixture of gases is cooled to a temperature less than 0° C. and is contacted with ice, which results in the formation of chlorine hydrate on the ice. The ice is separated fro... | 11/16/1999 |
| 5935372 | Adhesive sealant for bonding metal parts to ceramics Disclosed is a blend capable of forming a semi-interpenetrating network when cured of (A) a solution of about 30 to about 50 wt % solids in an organic solvent of a fully imidized polyimidesiloxane and (B) about 5 to about 30 pbw per 100 pbw of the polyimi... | 08/10/1999 |
| 5922167 | Bending integrated circuit chips Disclosed is a method of bonding integrated circuit chips to lead frames where the leads are later soldered. A solution of an adhesive polyimide is used. The polyimide is the reaction product of an aromatic dianhydride and a mixture of an aromatic diamine... | 07/13/1999 |
| 5879540 | Process for reducing corrosion in a system for separating aromatic hydrocarbons from a mixture with aliphatic hydrocarbons Disclosed is a process for reducing corrosion in a system in which aromatic hydrocarbons are separated from a mixture with aliphatic hydrocarbons. The aromatic hydrocarbons are extracted from the mixture using an extracting solvent. The aromatic hydrocarb... | 03/09/1999 |
| 5874606 | Process for making o-arylbenzonitriles Disclosed is a method of making an o-arylbenzonitrile. A mixture is prepared of o-chlorobenzonitrile and about 1.0 to about 2.0 equivalents per equivalent of o-chlorobenzonitrile of a substituted phenylmagnesium halide in about 5 to about 30 mL per gram o... | 02/23/1999 |
| 5874630 | Synthesis of mercaptans from alcohols Disclosed is a method of making a mercaptan by reacting an aliphatic alcohol with hydrogen sulfide in a continuous gaseous phase reaction. The reaction is performed in the presence of a catalyst which comprises a catalytically active carrier that contains... | 02/23/1999 |
| 5869161 | Tape comprising solvent-containing non-tacky, free-standing, fully imidized polyimide film Disclosed is a tape which comprises a non-tacky, free-standing, 90 to 100% imidized polyimide film containing 0.1 to 30 wt % of a solvent having a releasable film adhering to at least one side. The film is used to form coatings on substrate or as an adhes... | 02/09/1999 |
| 5856425 | Dispensable resin paste Disclosed is a resin paste made from a maleimide having at least two maleimide groups and a liquid diamine. The paste can optionally contain fillers, thickeners, defoamers, coupling agents, and solid epoxies. The resin paste has a long pot life and a shor... | 01/05/1999 |
| 5816326 | Uphole disposal tool for water producing gas wells Disclosed is an apparatus for recovering gas from an underground source of gas and water and for disposing of water from the source into a porous stratum above the source. A casing having perforations at the level of the porous stratum extends from the su... | 10/06/1998 |
