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| Number | Title | Issue Date |
| 5410077 | Controlled epoxidation of propylene In a regulated process wherein propylene is reacted with tertiary butyl hydroperoxide in solution in tertiary butyl alcohol to produce propylene oxide and tertiary butyl alcohol in a reactor system comprising a first isothermal segment comprising a plural... | 04/25/1995 |
| 5395982 | Continuous isobutylene-assisted aqueous extraction of methanol from methyl tertiary butyl ether An impure methyl tertiary butyl ether product contaminated with isobutylene, methanol and water is purified by continuous counter-current contact with water and isobutylene in a counter-current contact extraction tower to provide an overhead extract compr... | 03/07/1995 |
| 5364981 | On-step synthesis of methyl t-butyl ether from t-butanol using platinum/palladium modified ଲ-zeolite catalysts Disclosed is an improved process for preparing alkyl tertiary alkyl ethers, especially methyl t-butyl ether, in one step which comprises reacting tertiary butanol and methanol in the presence of a catalyst comprising ଲ-zeolite modified with one or m... | 11/15/1994 |
| 5364988 | Use of supported chromium catalyst in the preparation of tertiary butyl alcohol from tertiary butyl hydroperoxide A method for preparing tertiary butyl alcohol wherein a feedstock comprising a solvent solution of tertiary butyl hydroperoxide in tertiary butyl alcohol or a mixture of tertiary butyl alcohol with isobutane is charged to a hydroperoxide decomposition rea... | 11/15/1994 |
| 5359130 | Use of supported palladium/platinum catalysts in the preparation of tertiary butyl alcohol from tertiary butyl hydroperoxide A method for preparing tertiary butyl alcohol wherein a feedstock comprising a solvent solution of tertiary butyl hydroperoxide in tertiary butyl alcohol or a mixture of tertiary butyl alcohol with isobutane is charged to a hydroperoxide decomposition rea... | 10/25/1994 |
| 5354925 | Use of supported lead oxide catalyst in the preparation of tertiary butyl alcohol from tertiary butyl hydroperoxide A method for preparing tertiary butyl alcohol wherein a feedstock comprising a solvent solution of tertiary butyl hydroperoxide in tertiary butyl alcohol or a mixture of tertiary butyl alcohol with isobutane is charged to a hydroperoxide decomposition rea... | 10/11/1994 |
| 5354917 | Use of supported rhodium catalysts in the preparation of tertiary butyl alcohol from tertiary butyl hydroperoxide A method for preparing tertiary butyl alcohol wherein a feedstock comprising a solvent solution of tertiary butyl hydroperoxide in tertiary butyl alcohol or a mixture of tertiary butyl alcohol with isobutane is charged to a hydroperoxide decomposition rea... | 10/11/1994 |
| 5354431 | Plural stage drying and purification of propylene oxide Crude propylene oxide is purified by a distillation process wherein it is (a) extractively distilled in a first column using a C2 to C6 alkylene glycol extractive distillation agent to form a first overhead fraction comprising propyl... | 10/11/1994 |
| 5354430 | Staged purification of contaminated propylene oxide Contaminants are removed from impure propylene oxide by fractionating in a first column to remove overhead essentially all of the pentenes and pentanes and most of the oxygen-containing impurities to provide a partially purified first propylene oxide bott... | 10/11/1994 |
| 5352835 | Supported catalysts for amination Disclosed is a process for the amination of polyols to form primary amines which comprises reacting a polyoxyalkylene alcohol or polyol having a molecular weight of from about 230 to 5000 and ammonia in the presence of hydrogen over a catalyst consisting ... | 10/04/1994 |
| 5349110 | Synthesis of low molecular weight glycol ethers from oxiranes plus olefins Disclosed is a process for preparation of monoalkyl ethers by reacting low molecular weight olefins and the corresponding oxiranes, in the presence of a catalyst comprising an acidic heterogeneous or homogeneous catalyst, generally represented by the equa... | 09/20/1994 |
| 5348712 | Use of carbonates in metal ion extraction It has been discovered that relatively large cyclic and open chain carbonates are extremely efficient in the selective extraction of metal ions, such as gold, silver, platinum and mercury from aqueous solution without the need for a potentially hazardous,... | 09/20/1994 |
| 5349072 | Staged epoxidation of propylene with recycle In reacting tertiary butyl hydroperoxide in solution in tertiary butyl alcohol with propylene to produce propylene oxide and tertiary butyl alcohol in a reactor system comprising a first isothermal segment and a second adiabatic segment about 60 to 80 wt ... | 09/20/1994 |
| 5345009 | Conjoint production of ditertiary butyl peroxide and tertiary butyl alcohol from tertiary butyl hydroperoxide A method for conjointly preparing tertiary butyl alcohol and ditertiary butyl peroxide wherein a solution of a tertiary butyl hydroperoxide feedstock in tertiary butyl alcohol is charged to a hydroperoxide decomposition reaction zone containing a catalyti... | 09/06/1994 |
| 5344996 | Catalyst removal from alcohol alkoxylates using acid clays The removal of basic alkaline earth metal catalysts from alcohol alkoxylate product streams using acid days wetted with water is described. The catalyst level may be reduced to 1 ppm or less in many instances. Effective acid days include, but are not limi... | 09/06/1994 |
| 5344984 | Method for preparing "twin-tailed" polyoxyalkylene tertiary amines A method for preparing "twin-tailed" tertiary amines which have two moles of alkoxylated phenol bonded to each nitrogen function of a molecule of methylamine and represented by the formula: ##STR1## wherein x represents zero to about 30 which compris... | 09/06/1994 |
| 5342918 | Carboxyl-terminated polyetheramines Described are carboxyl-terminated polyetheramides of the formula: ##STR1## where R is a moiety from an alcohol or hydroxy compound having a valence of k; R' is independently hydrogen or lower alkyl from 1 to 4 carbon atoms; R" is independently a stra... | 08/30/1994 |
| 5340446 | Purification of propylene oxide by cosolvent extractive distillation An extractive distillation agent consisting essentially of a mixture of triethylene glycol with a lower boiling cosolvent selected from the group consisting of 2-methyl-2,4-pentanediol, tertiary butyl alcohol and ethylene glycol is fed to an extractive di... | 08/23/1994 |
| 5340889 | Liquification of bis-carbonates of bis-glycidyl ethers Liquid hydroxyurethane products having cyclocarbonate end groups are prepared by reacting a molar excess of a bis-carbonate of a bis-glycidyl ether of neopentyl glycol or 1,4-cyclohexanedimethanol with a polyoxyalkylenediamine such as a polyoxypropylenedi... | 08/23/1994 |
| 5338890 | One step synthesis of methyl t-butyl ether from t-butanol using alkylsulfonic acid-modified oxide catalysts Disclosed is a method wherein t-butanol is reacted with methanol in one step to provide methyl t-butyl ether at a temperature of about 20° C. to 250° C. and a pressure of about atmospheric to about 1000 psig employing a heterogenous catalyst comprising ... | 08/16/1994 |
| 5336315 | Soil stabilization process This invention is concerned with a soil stabilization process in which soil particles comprising the soil surfaces to be stabilized are contacted or treated with an aqueous solution of an alkali metal silicate, such as sodium silicate, and a carbonate rea... | 08/09/1994 |
| 5336790 | Molybdenum recovery A process for recovery of molybdenum from residual fractions derived from an epoxidation reaction of propylene with tertiary butyl hydroperoxide in liquid phase with tertiary butyl alcohol, in the presence of soluble molybdenum, which process comprises: F... | 08/09/1994 |
| 5324838 | Bicyclo[4.3.0]1,4,7-triazanon-4-ene-one useful in the extraction of precious metals Bicyclo[4.3.0]1,4,7-triazanony-6-ene-5-one may be made easily, in good yield and in one step by reacting diethyl oxalate with a diethylene triamine. The bicyclo[4.3.0]1,4,7-triazanon-6-ene-5-one material made by this process may be used to selectively sep... | 06/28/1994 |
| 5324812 | Water soluble polyamide from polyalkylene glycol diamines and polycarboxylic acids Water soluble polyamides may be produced by reacting two different dicarboxylic acids with at least one low molecular weight poly(alkylene glycol) diamine and at least one relatively high molecular weight polyoxyalkylene diamine. One dicarboxylic acid may... | 06/28/1994 |
| 5317076 | Polyurea elastomer with reduced moisture vapor transmission A polyurea elastomer which exhibits a reduced moisture transfer rate is disclosed. The elastomer includes an isocyanate, an amine terminated 1,2-polyoxybutylene diol and a chain extender. The isocyanate is preferably a quasiprepolymer of an isocyanate and... | 05/31/1994 |
| 5313006 | Cogeneration of isobutylene plus MTBE from crude t-butanol/methanol feedstocks Disclosed is an improvement in a method for cogeneration of isobutylene and MTBE by etherification of tBA/MeOH over an ion-exchange resin which allows for more complete conversion of the remaining tBA fraction and comprises a second step consisting essent... | 05/17/1994 |
| 5308882 | Preparation of polyurethane foam without a tertiary amine catalyst This invention is a molded flexible polyurethane foam containing acid-modified polyoxypropyleneamine comprising a polyol, a polyisocyanate, water, and a crosslinker/catalyst of the formulae: ##STR1## where R' is an alkylene radical having from about ... | 05/03/1994 |
| 5304681 | Tert-butylamine synthesis over montmorillonite clays Disclosed is a method for preparation of alkylamines which comprises reacting ammonia and a monounsaturated olefin in the presence of a catalyst selected from the group consisting of: a. Acid modified montmorillonite clays; b. Heterogeneous catalysts comprisin... | 04/19/1994 |
| 5300703 | Alkylphenol synthesis using heteropoly acid catalysts Disclosed is a one step method for synthesis of alkylphenols which comprises reacting phenol with the corresponding olefin under adiabatic conditions in the presence of a catalyst comprising a heteropoly acid represented by the structure: H8-n ... | 04/05/1994 |
| 5300697 | One step synthesis of methyl t-butyl ether from t-butanol using hydrogen fluoride-modified zeolite catalysts A method is disclosed wherein t-butanol is reacted with methanol in a reaction zone in one step to provide methyl tert-butyl ether and the improvement of accomplishing the reaction which comprises: a. Using a catalyst consisting of a crystalline aluminosilicat... | 04/05/1994 |
| 5298618 | Macrocyclic oxamides Macrocyclic oxamides may be made easily, in good yield and in one step by reacting an oxalic compound, such as oxalic acid or oxalic esters, with a diamine, where the amine groups are separated by at least five atoms. The oxalic compounds may include, but... | 03/29/1994 |
| 5298081 | Process for removing cured fiberglass resin from substrates A process for the dissolution of cured polyester resins is disclosed. A cured polyester resin may be dissolved, or removed from a substrate, by contacting the polyester resin with an alkylene carbonate, alone or as a co-solvent with one or more other solv... | 03/29/1994 |
| 5293939 | Formation treating methods Disclosed are methods for treating wells to form a permeable barrier around the well for consolidating unconsolidated mineral particles such as sand in a subterranean petroleum formation penetrated by a well, or for forming an impermeable barrier for flui... | 03/15/1994 |
| 5290527 | Molybdenum recovery A process for recovery of molybdenum from residual fractions derived from an epoxidation reaction of propylene with tertiary butyl hydroperoxide in liquid phase with tertiary butyl alcohol, in the presence of soluble molybdenum, which process comprises: F... | 03/01/1994 |
| 5288873 | Aminated alkoxylated imidazolidones Disclosed is a novel polyetherdiamine comprising an aminated, alkoxylated 1,2'-hydroxyethyl-2-imidazolidone represented by the formula: ##STR1## where R is H or an alkyl group of from 1 to 16 carbon atoms, R1, R2, R3 ... | 02/22/1994 |
| 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 |
| 5283356 | Process for manufacturing alkylene carbonates using metal phthalocyanine catalysts A method for the manufacture of alkylene carbonates is disclosed. Alkylene carbonates are prepared by reacting alkylene oxides and carbon dioxide in the presence of a metal phthalocyanine catalyst.... | 02/01/1994 |
| 5276239 | Dimerization of long-chain olefins using a silica gel alkylsulfonic acid A process is disclosed for preparing synthetic lubricant base stocks having a high dimer to trimer ratio from long-chain olefins. These synthetic lubricant base stocks are prepared in good yield by dimerizing linear olefins using a catalyst comprising a s... | 01/04/1994 |
| 5276215 | Alkylphenol synthesis using zeolites as catalysts, particularly dealuminized y-zeolites Disclosed is a one-step method for synthesis of alkylphenols which comprises reacting phenol with the corresponding olefin under adiabatic conditions in the presence of a zeolite catalyst, preferably a dealuminated Y-zeolite, a modified Y-zeolite, or a &#... | 01/04/1994 |
| 5276192 | Preparation of phenoxyethanamines A process for preparing phenoxyethanamines from phenols and 2-oxazolines in quantitative yields was discovered. Phosphoric acid hydrolyzes the amide intermediate from the phenol/2-oxazoline reaction without cleaving the amide at the ether linkage and with... | 01/04/1994 |
