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| Number | Title | Issue Date |
| 5286884 | Thermosyphonic reaction of propylene with tertiary butyl hydroperoxide and reactor A method and apparatus for continuously catalytically exothermally reacting propylene with tertiary butyl hydroperoxide in a reaction mixture stream comprising a tertiary butyl alcohol solution of catalyst, reacting propylene, reacting tertiary butyl hydr... | 02/15/1994 |
| 5243083 | Thermosyphonic reaction of oxygen with isobutane and reactor A method and apparatus for continuously conducting an exothermic chemical reaction between a reactant feedstock such as isobutane and a chemical reactant such as oxygen wherein a circulating stream of the reaction mixture continuously flows up an upstandi... | 09/07/1993 |
| 5243091 | Method for the manufacture and recovery of methyl tertiary butyl ether A method for the preparation of methyl tertiary butyl ether is provided wherein a mixture of methanol and substantially peroxides-free tertiary butyl alcohol are catalytically reacted to form a reaction product that is separated into a first lighter disti... | 09/07/1993 |
| 5243100 | Preparation of tertiary butyl alcohol using promoted cycloalkenyl iron catalyst A method for preparing tertiary butyl alcohol wherein a solution of a tertiary butyl hydroperoxide feedstock comprising a solution of tertiary butyl hydroperoxide in tertiary butyl alcohol is charged to a hydroperoxide decomposition reaction zone containi... | 09/07/1993 |
| 5243101 | Removal of peroxide contaminants from tertiary butyl alcohol Motor-fuel tertiary butyl alcohol contaminated with residual amounts of tertiary butyl hydroperoxide, ditertiary butyl peroxide and allyl tertiary butyl peroxide (which is prepared, for example, by reacting propylene with tertiary butyl hydroperoxide to f... | 09/07/1993 |
| 5239048 | Aromatic polyoxyalkylene amidoamines Block polyamido polyamine condensation products of an aromatic polycarboxylic acid component with a polyoxyalkylene polyamine component prepared by reacting the polycarboxylic acid component with an amount of the polyoxyalkylene polyamine component suffic... | 08/24/1993 |
| 5232559 | Separation of molybdenum An organic solution of a soluble molybdenum compound is ammonated with ammonia, ammonium hydroxide and/or an ammonium salt in order to significantly reduce the electrical resistance of the solution and a direct electric current is passed therethrough in o... | 08/03/1993 |
| 5206424 | Decomposition of tertiary butyl hydroperoxide using cycloalkenyl iron catalyst A method for preparing tertiary butyl alcohol wherein a solution of a tertiary butyl hydroperoxide in tertiary butyl alcohol is charged to a hydroperoxide decomposition reaction zone containing a catalytically effective amount of a soluble iron hydroperox... | 04/27/1993 |
| 5191143 | Preparation of isobutylene A method for the preparation of isobutylene substantially free from tertiary butyl formate and peroxides from a tertiary butyl alcohol feedstock contaminated with tertiary butyl formate and peroxides wherein the feedstock is continuously brought into cont... | 03/02/1993 |
| 5189221 | Amine separation process A mixture of C1 -C4 mono-, di- and trialkylamines is separated by adding at least about an equimolar amount, based on the amine mixture, of a formyldialkanolamine selected from the group consisting of formyldiethanolamine, formyl ami... | 02/23/1993 |
| 5185480 | Catalytic removal of peroxide contaminants from a methanol-tertiary butyl alcohol recycle stream Methanol contaminated with residual amounts of peroxide contaminants such as tertiary butyl hydroperoxide, ditertiary butyl peroxide, allyl tertiary butyl peroxide, etc., can be effectively catalytically treated with a catalyst consisting essentially of t... | 02/09/1993 |
| 5160587 | Extractive distillation of propylene oxide An extractive distillation agent consisting essentially of dipropylene glycol is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water, acetone and methanol to obtain an overhead distillate fraction ... | 11/03/1992 |
| 5157163 | Purification of methyl tertiary-butyl ether A method for the separation of methanol from MTBE contained in a reaction mixture comprising water, methanol, TBA and MTBE which comprises distilling the reaction mixture in the presence of added water in order to provide a distillate fraction containing ... | 10/20/1992 |
| 5154804 | Removal of water, acetone and methanol from propylene oxide by extractive distillation An extractive distillation agent consisting essentially of a monohydroxy alkoxyalkanol containing 5 to 8 carbon atoms is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water to obtain an overhead di... | 10/13/1992 |
| 5154803 | Purification of contaminated propylene oxide by extractive distillation An extractive distillation agent consisting essentially of 2-methyl-2,4-pentanediol is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water, acetone and methanol to obtain an overhead distillate fra... | 10/13/1992 |
| 5153287 | Preparation of hydroxylated low molecular weight polymodal butadiene polymers Hydroxy-containing, propylene carbonate insoluble butadiene polymers having an average molecular weight of about 400 to about 25,000 and containing an average of about 2 hydroxyl groups per molecule are prepared by polymerizing butadiene in a homogeneous ... | 10/06/1992 |
| 5151530 | Treatment of tertiary butyl hydroperoxide distillation fraction to remove acidic contaminants The distillation product fraction obtained from an isobutane oxidation reaction product after the removal of unreacted isobutane will contain tertiary butyl hydroperoxide, tertiary butyl alcohol and carboxylic acid contaminants such as formic acid, acetic... | 09/29/1992 |
| 5145563 | Dehydration of propylene oxide by extracting distillation An extractive distillation agent consisting essentially of glycerol-1,3-di-t-butylether is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water to obtain an overhead distillate fraction consisting o... | 09/08/1992 |
| 5145561 | Removal of water and methanol from propylene oxide by extractive distillation An extractive distillation agent consisting essentially of ethylene carbonate, propylene carbonate or a mixture thereof is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water to obtain an overhead ... | 09/08/1992 |
| 5139622 | Purification of propylene oxide by extractive distillation An extractive distillation agent consisting essentially of triethylene glycol is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water, acetone and methanol to obtain an overhead distillate fraction ... | 08/18/1992 |
| 5140097 | Thermoplastic thermosettable polyamide from poly(oxytetramethylene) diamine and poly(oxytetramethylene) oligomer polyamine Polyamide reaction products comprising: a dicarboxylic acid and a diamine component comprising a mixture of poly(oxytetramethylene) diamines and oligomers of said poly(oxytetramethylene) diamines, said mixture containing from about 85 to about 99.5 wt. % of sa... | 08/18/1992 |
| 5138097 | Amine terminated polyamides Liquid amine terminated polyamide addition products having an average molecular weight of about 3,000 to about 10,000 are prepared by the non-catalytic reaction of a dicarboxylic acid having a molecular weight within the range of about 130 to about 700 wi... | 08/11/1992 |
| 5136035 | Catalytic synthesis of alkyl morpholinones 4-Alkyl-2-morpholinones are prepared by bringing an N-alkyldiethanolamine into contact with a zinc oxide promoted copper catalyst in the presence of hydrogen under reaction conditions including a temperature within the range of about 240° to about 400° ... | 08/04/1992 |
| 5130382 | Hydroxy terminated polyoxypropylene polyamides Hydroxy terminated polyamides are prepared having the formula: ##STR1## wherein R represents a defined hydrocarbon group, R' and R" represents defined oxypropylene groups, and R'" represents a defined oxyethylene group, the hydroxy terminated polyamide ha... | 07/14/1992 |
| 5128492 | Precipitation of molybdenum An epoxidation reaction product formed by the molybdenum catalyzed reaction of propylene with tertiary butyl hydroperoxide to provide propylene oxide and tertiary butyl alcohol is separated by distillation into a propylene fraction, a propylene oxide frac... | 07/07/1992 |
| 5128441 | Block polyamido condensation products A block polyamido primary amine condensation product prepared by reacting a defined polyoxyalkylene polyamine having terminal primary amine groups with an amount of a defined dicarboxylic acid or an anhydride or a C1 to C4 alkyl este... | 07/07/1992 |
| 5127997 | Purification of propylene oxide by liquid extraction Purified propylene oxide is recovered from an impure propylene oxide feedstock contaminated with more than 50 ppm of six carbon atom hydrocarbon impurities by a solvent extraction process wherein: an impure propylene oxide feedstock is charged to a liquid/liqu... | 07/07/1992 |
| 5120879 | Reaction of hypochlorites with polyoxypropylene glycols Polyoxypropylene diketones are prepared by initially adding predetermined amounts of a mono- or dicarboxylic acid having a pK1%, a polyoxypropylene glycol and, optionally, water, to a reaction zone and thereafter... | 06/09/1992 |
| 5116465 | Removal of water, methanol and acetone from propylene oxide by extractive distillation An extractive distillation agent consisting essentially of 2-hydroxyethyl 2-hydroxyethylcarbamate, and is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water to obtain an overhead distillate fracti... | 05/26/1992 |
| 5116467 | Water and acetone removal from propylene oxide by extractive distillation An extractive distillation agent consisting essentially of sulfolane is fed to an extractive distillation column used for the distillation of propylene oxide contaminated with water to obtain an overhead distillate fraction consisting of essentially anhyd... | 05/26/1992 |
| 5106458 | Method for the purification of propylene oxide Methyl formate is removed from impure propylene oxide by contacting the impure propylene oxide in a treating zone with a basic ion exchange resin for a period of time sufficient to convert the methyl formate to formic acid and methanol, and by withdrawing... | 04/21/1992 |
| 5107067 | Catalytic reaction of propyelne with tertiary butyl hydroperoxide Complexes made by reacting an ammonium-containing molybdenum compound with an alkylene glycol in the presence of water at an elevated temperature are described. Mild stripping of the water subsequent to complex formation is preferred. If some of the water... | 04/21/1992 |
| 5103062 | Modified normally liquid, water-soluble polyoxyalkylene polyamines In accordance with the process of the present invention normally liquid, water-soluble poly(oxyethylene/oxypropylene) polyamine products are prepared using an initiator, which may contain oxyethylene groups. In a series of alkoxylation reaction steps the ... | 04/07/1992 |
| 5101060 | Paired Mannich condensates of alkyl phenols Normally liquid final Mannich condensates prepared by reacting a para C1 -C15 alkyl phenol with formaldehyde and a first polyoxyalkylene diamine to form an intermediate Mannich condensate that is reacted with formaldehyde and a secon... | 03/31/1992 |
| 5099073 | Catalytic process for the production of diketone derivatives of polyoxypropylene glycols A process for the conversion of a polyoxypropylene glycol to the corresponding diketone derivative by dehydrogenation in the presence of an unsupported nickel, copper, chromia catalyst or a Raney nickel catalyst.... | 03/24/1992 |
| 5098986 | Paired alkyl phenol Mannich condensates Normally liquid polyfunctional final Mannich condensates that are useful as curing agents for epoxy resins are prepared by reacting a para C1 -C15 alkyl phenol with formaldehyde and a first polyoxyalkylene diamine to form an intermed... | 03/24/1992 |
| 5095116 | Block amido-amine condensation products A block amido-amine condensation product having the formula: ##STR1## wherein R' represents hydrogen or methyl, and R" represents an organic group selected from the group consisting of polyoxyethylene groups, polyoxypropylene groups, polyoxyethylene/... | 03/10/1992 |
| 5093509 | Removal of trace quantities of molybdenum An epoxidation reaction product formed by the molybdenum catalyzed reaction of propylene with tertiary butyl hydroperoxide to provide propylene oxide and tertiary butyl alcohol is separated by distillation into a propylene fraction, a propylene oxide frac... | 03/03/1992 |
| 5093506 | Removal of acidic contaminants from tertiary butyl hydroperoxide The distillation product fraction obtained from an isobutane oxidation reaction product after the removal of unreacted isobutane will contain tertiary butyl hydroperoxide, tertiary butyl alcohol and carboxylic acid contaminants such as formic acid, acetic... | 03/03/1992 |
| 5093382 | Preparation of foams using polyfunctional organic acids Foamed reaction products of organic polyisocyanates containing an average of at least 2 isocyanate groups per molecule with equivalent weights of carbon dioxide-generating, carboxyl group terminated addition reaction products of a polyoxyalkylene polyamin... | 03/03/1992 |
