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| Number | Title | Issue Date |
| 8141633 | Detecting fluids in a wellbore In one general implementation, a method for identifying fluids in a wellbore includes generating light in a visible spectrum from a light source in a production wellbore; generating light in an ultraviolet spectrum from the light source in the production wellbore; r... | 03/27/2012 |
| 8115038 | Methods of making chlorinated hydrocarbons Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for ... | 02/14/2012 |
| 6685904 | Process for making phosphorus halides and oxyhalides Disclosed is a process for producing phosphorous trichloride, phosphorous pentachloride, or phosphorous tribromide by reacting phosphine gas with chlorine gas or bromine gas, in a mixture with hydrogen gas. The phosphine is dried and the reaction is perfo... | 02/03/2004 |
| 6608115 | Polyvinyl chloride resins and method of preparation and use in the production of whitened polyvinyl chloride foam Polyvinyl chloride resin compositions and methods of preparation and use thereof for increasing the degree of whiteness in finished polyvinyl chloride foam. The resin compositions contain sulfur compounds selected from sulfonic acid derivatives, sulfinic ... | 08/19/2003 |
| 6605649 | Method of production of whitened polyvinyl chloride foam Polyvinyl chloride resin compositions and methods of preparation and use thereof for increasing the degree of whiteness in finished polyvinyl chloride foam. The resin compositions contain sulfur compounds selected from sulfonic acid derivatives, sulfinic ... | 08/12/2003 |
| 6506854 | Inhibiting scale in vinyl monomer polymerization Disclosed is a solution that comprises (A) a solvent; (B) about 0.001 to about 20 wt % of a terpolymer that comprises the condensation reaction product of (1) an aromatic compound that contains a benzene or naphthalene ring substituted with the group OR or SR,... | 01/14/2003 |
| 6500873 | Polyvinyl chloride resins and method of preparation and use in the production of whitened polyvinyl chloride foam Polyvinyl chloride resin compositions and methods of preparation and use thereof for increasing the degree of whiteness in finished polyvinyl chloride foam. The resin compositions contain sulfur compounds selected from sulfonic acid derivatives, sulfinic ... | 12/31/2002 |
| 6462153 | Method of polymerizing vinyl chloride monomer Disclosed is a catalyst composition and a method of polymerizing vinyl chloride using it. The catalyst composition is a mixture of a vanadyl (V) catalyst having the formula ##STR1## and about 0.5 to about 15 moles of an alkyl aluminum cocatalyst having th... | 10/08/2002 |
| 6451904 | Preparing sterile articles from polymers containing a stabilizer based on a poly (oxyalkylene) Novel polymer stabilizers are disclosed. The novel stabilizers have the general formula (R)q Sn-(MR"-OCH2 -R'CH]m -OT)4-q, P-[(OCH2 -R'CH)m OT]3' ##STR1## wherein M is O or S and... | 09/17/2002 |
| 6447157 | 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... | 09/10/2002 |
| 6414076 | Method of predetermining the gloss of PVC compounds A method of making an article from polyvinyl chloride compound that has a predetermined amount of gloss is disclosed. Samples of the resin are prepared that have different molecular weight distributions. Articles are made from the samples and the gloss of... | 07/02/2002 |
| 6375735 | Precipitated silicas, silica gels with and free of deposited carbon from caustic biomass ash solutions and processes Disclosed are amorphous precipitated silicas, silica gels, and amorphous carbons derived from biomass and methods of producing them with and without adhered or deposited amorphous carbons produced by acidifying a caustic silicate solution produced by caus... | 04/23/2002 |
| 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 |
| 6218496 | Polyimidesiloxane adhesive Disclosed is a polyimidesiloxane adhesive made by reacting in a solution of an organic solvent a dianhydride selected from the group consisting of biphenyl dianhydride and oxydiphthalic anhydride with an approximately stoichiometric amount of a diamine. T... | 04/17/2001 |
| 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 |
| 6211399 | Pressurized chlorination and bromination of aromatic compounds Disclosed is a method of adding 1 to 4 chlorine or bromine atoms to an aromatic ring of compound that has at least one electron-withdrawing groups on that ring. The aromatic compound is reacted with a chlorinating agent or a brominating agent in the prese... | 04/03/2001 |
| 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 |
| 6201161 | Method of reducing benzaldehyde or benzotrihalide content in a mixture Disclosed is a method of removing about 0.05 to about 20 mole % of a benzaldehyde or benzotrihalide from a mixture with a liquid compound that boils within about -10 to about &#b1;5° C. of the boiling point of the benzaldehyde or benzotrihalide. To the m... | 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 6130361 | Reducing meta content of isomeric mixtures of halo substituted toluenes Disclosed is a method of separating the meta isomer of a halotoluene having the general formula ##STR1## from a mixture with at least one other isomer, where X is Cl or Br. About 0.0001 to about 5 wt % of a Friedel-Crafts catalyst is added to the ... | 10/10/2000 |
| 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 |
| 6118028 | Method of making trifluoromethoxybenzenes Disclosed is a process for making an ,,-trifluoromethoxybenzene by reacting an ,,-trichloromethoxybenzene or an ,,-tribromomethoxybenzene with gaseous hydrogen fluoride in the presence of... | 09/12/2000 |
| 6118018 | Chlorination and bromination of aromatic compounds at atmospheric pressure Disclosed is a method of adding 1 to 4 chlorine or bromine atoms to an aromatic ring of compound that has at least one electron-withdrawing groups on that ring. The aromatic compound is reacted with a chlorinating agent or a brominating agent in the prese... | 09/12/2000 |
| 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 |
