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| Number | Title | Issue Date |
| 4544776 | Process for separating methanol from the reaction products obtained in the etherification of C4 through C7 isoolefins with methanol The reaction product from etherification of C4 -C7 isoolefins with methanol in the presence of an acidic catalyst is washed with water in the presence of inert hydrocarbons thereby removing methanol and a part of the tertiary alcohol... | 10/01/1985 |
| 4544454 | Separation of isopropyl ether from methyl ethyl ketone by extractive distillation Isopropyl ether cannot be completely removed from isopropyl ether - methyl ethyl ketone mixtures by distillation because of the presence of the minimum binary azeotrope. Isopropyl ether can be readily removed from mixtures containing it and methyl ethyl k... | 10/01/1985 |
| 4510022 | Separation of isopropyl ether from isopropanol and water by extractive distillation Isopropyl ether cannot be completely removed from isopropyl ether-isopropanol-water mixtures by distillation because of the presence of the minimum ternary azeotrope. Isopropyl ether can be readily removed from mixtures containing it, isopropanol and wate... | 04/09/1985 |
| 4504688 | Process for the preparation of pure alkyl tert-alkyl ethers and hydrocarbon raffinates which are largely free from isoolefins and from alkanols A process for the preparation of pure alkyl tertiary alkyl ethers and hydrocarbon raffinates which are substantially free from tertiary olefins and alkanols. An alkanol and a hydrocarbon mixture containing at least one tertiary olefin are contacted with t... | 03/12/1985 |
| 4503265 | Process for the production of methyl tert.-butyl ether (MTBE) and of hydrocarbon raffinates substantially freed from i-butene and from methanol In the reaction of methanol and of i-butene which is contained in a hydrocarbon mixture on an acid cation exchange material to give methyl tert.-butyl ether (MTBE), methanol and i-butene can be used in essentially equimolar amounts if simultaneously to th... | 03/05/1985 |
| 4490563 | Ether recovery MTBE is recovered from an ether containing effluent by fractionation. When driers are not used on the hydrocarbon feed to MTBE manufacture, a separate water-methanol phase occurs in the fractionation overhead which is separately processed in a methanol fr... | 12/25/1984 |
| 4475005 | Process for preparing tertiary alkyl ethers A process for preparing tertiary alkyl ethers from isoolefins and aliphatic alcohols in the presence of a catalyst in the form of sulphonated styrene-divinylbenzene resins, characterized in that both the reaction leading to the formation of the tert-alkyl... | 10/02/1984 |
| 4469491 | Separation of diisopropylether from hydrocarbon streams A process for the separation of diisopropylether from a hydrocarbon stream containing it, by contacting the stream with ethylene glycol whereby the diisopropylether is absorbed by the glycol and a purified hydrocarbon stream is separated therefrom.... | 09/04/1984 |
| 4465870 | Etherification process with sorptive treating of hydrocarbon recycle stream An integrated process for producing ethers, such as methyl tertiary butyl ether, is disclosed. Specific undesired compounds such as water, methanol or the product ether are removed from a hydrocarbon recycle stream withdrawn from the etherification zone b... | 08/14/1984 |
| 4459179 | Separation of isopropyl ether from acetone by extractive distillation Isopropyl ether cannot be completely removed from isopropyl ether-acetone mixtures by distillation because of the presence of the minimum binary azeotrope. Isopropyl ether can be readily removed from mixtures containing it and acetone by using extractive ... | 07/10/1984 |
| 4459178 | Separation of isopropyl ether from methyl ethyl ketone by extractive distillation Isopropyl ether cannot be completely removed from isopropyl ether - methyl ethyl ketone mixtures by distillation because of the presence of the minimum binary azeotrope. Isopropyl ether can be readily removed from mixtures containing it and methyl ethyl k... | 07/10/1984 |
| 4450294 | Process for recovering oxygenated organic compounds from dilute aqueous solutions employing solid sorbent An oxygenated organic compound, such as ethanol, is recovered from a dilute aqueous stream thereof by contacting said stream with crosslinked polyvinylpyridine resin or nuclear substituted derivative thereof to effect selective sorption of the compound by... | 05/22/1984 |
| 4447643 | Process for recovering oxygenated organic compounds from dilute aqueous solutions employing liquid extraction media A thermally efficient process for recovering an oxygenated organic material, such as ethanol, present in dilute aqueous solution is disclosed which comprises contacting said dilute aqueous solution with at least one inert extractant which is liquid at amb... | 05/08/1984 |
| 4447653 | Adsorbent regeneration in integrated etherification process An improved method is disclosed for regenerating adsorbents used in an integrated process for the production of ethers such as methyl tertiary butyl ether by the reaction of an alcohol with an isoolefin. The sorbents are used to remove such compounds as t... | 05/08/1984 |
| 4440963 | Production of MTBE and ETBE The fractionation of the methanol- or ethanol-containing methyl-(or ethyl)-tertiary-butyl ether reactor effluent is improved by employing 2-methylpentane to azeotrope methanol or ethanol overhead, or by using 1,1,3-trichloro-1,2,2-trifluoroethane (F113) t... | 04/03/1984 |
| 4404118 | Regeneration of adsorbents by low temperature hydrogen stripping A method is disclosed for regenerating a solid adsorbent which has been used to remove oxygen-containing hydrocarbonaceous compounds, water or sulfur-containing compounds from a hydrocarbon stream. The method is preferably applied to molecular sieves whic... | 09/13/1983 |
| 4371718 | Using butenes to fractionate methanol from methyl-tertiary-butyl ether Butenes are added to the methanol-containing methyl-tertiary-butyl ether (MTBE) reactor effluent fractionation to effect recovery of substantially methanol-free MTBE bottoms product. Methanol analysis taken below the fractionator feed locus manipulates co... | 02/01/1983 |
| 4334964 | Process for separating the reaction products obtained from etherifying lower isoolefins with methanol A method for separating a mixture of reaction products produced in the catalytic etherification of a lower isoolefin with methanol wherein said reaction product comprises a mixture of ether, methanol, unreacted hydrocarbon and tertiary alcohol which compr... | 06/15/1982 |
| 4329516 | Process for the production of methyl t-butyl ether A process is described for producing methyl tert.-butyl ether from butane-containing light hydrocarbon mixtures. The n-butane is isomerized to isobutane which is dehydrogenated to an isobutene/isobutane molar ratio of 0.4 to 2:1, the isobutene in the mixt... | 05/11/1982 |
| 4324924 | Process for removing isobutene from a C4 cut and producing methyl tert-butyl ether Process for producing methyl tert-butyl ether (MTBE) by reacting methanol with the isobutene present in a C4 cut in a proportion from 10 to 60%, wherein said cut, admixed with methanol is contacted, in a first reaction zone, with an acid cataly... | 04/13/1982 |
| 4322565 | Process for purifying ethers An alkyl t-alkyl ether corresponding to the formula R--O--R', wherein R is a methyl or ethyl group and R' is a t-butyl or t-amyl group, is separated from the alkanol in a reactor effluent comprising a mixture of the ether, unreacted C1 -C2... | 03/30/1982 |
| 4302298 | Process for isolating methyl tert-butyl ether from the reaction products of methanol with a C4 hydrocarbon cut containing isobutene Process for isolating methyl tert-butyl ether contained in the reaction product of methanol with a C4 hydrocarbon cut containing isobutene, comprising fractionating said reaction product by introducing it at an intermediate point of a distillat... | 11/24/1981 |
| 4299999 | Process for the preparation and isolation of methyl-tert-butyl ether Process for producing and isolating methyl-tert-butyl ether (MTBE) comprising etherifying isobutene, contained in a C4 hydrocarbons mixture, with methanol in the presence of a recycle stream of C5 and/or C6 hydrocarbons, s... | 11/10/1981 |
| 4282389 | Process for the simultaneous manufacture of pure MTBE and a substantially isobutene-free mixture of C4 -hydrocarbons A process for the simultaneous manufacture of pure methyl tertiary butyl ether (MTBE) and a substantially isotubene-free mixture of C4 -hydrocarbons, by reacting the isobutene contained in the mixture of C4 -hydrocarbons with excess ... | 08/04/1981 |
| 4262149 | Process for separating alkanols from aqueous calcium chloride A C1 -C2 alkanol is separated from aqueous calcium chloride by adding a C4 or C5 hydrocarbon feed comprising an isoolefin to an aqueous solution of a calcium chloride-alkanol complex wherein the alkanol is metha... | 04/14/1981 |
| 4242526 | Process for the direct separation of isobutylene from mixtures of hydrocarbons Methyl tertiary butyl ether is produced from a mixture of C4 hydrocarbons containing isobutylene and butadiene. The isobutylene is selectively reacted with a greater than stoichiometric amount of methanol at a temperature of 50 to 120 degrees C... | 12/30/1980 |
| 4219678 | Process for preparing pure methyl tert.-butyl ether Process for the preparation of pure methyl tert.-butyl ether. Isobutene or isobutene-containing hydrocarbon mixtures are reacted with methanol in a molar ratio of 1:1 to 1:2 in the liquid phase at temperatures of between 30° and 100° C. on sulfonated, s... | 08/26/1980 |
| 4218569 | Method for processing etherified light hydrocarbon mixtures to remove methanol Mixed hydrocarbons of predominantly four carbon atoms each are subjected to etherification with methanol, to make ether from the tertiary olefin in the mixture; the unreacted hydrocarbons, after separation from the ether by distillation, are contaminated ... | 08/19/1980 |
| 4204077 | Etherification processing of light hydrocarbons In the processing of olefinic hydrocarbon mixtures containing isobutylene and isoamylene which are etherified with methanol to obtain higher octane components, unreacted methanol is removed from the etherified mixture by contact with a separate liquid gly... | 05/20/1980 |
| 4198530 | Production of tertiary butyl methyl ether A mixed C4 hydrocarbon stream containing from 5 to 60% isobutene is mixed with methanol providing from about 2% to about 20% excess methanol (stoichiometry based on isobutene content) to provide fresh feed for preparing tertiary butyl methyl et... | 04/15/1980 |
| 4148695 | Preparation and recovery of ethers Methyl t-butyl ether may be recovered from etherification reaction effluent by extractive distillation in the presence of n-butanol.... | 04/10/1979 |
| 4144138 | Recovery of ethers Methyl tertiary butyl ether may be recovered from etherification reaction effluent by azeotropic distillation to recover methanol-ether azeotrope overhead which is water-washed to give pure ether raffinate plus ether-methanol bottoms, the latter being aze... | 03/13/1979 |
| 4116955 | Inclusion complex compound, process for its production, and method for its use An inclusion complex compound comprising (a) meta-cyclophane and (b) a trans-terpenoid of the formula ##STR1## wherein n is an integer of 1 to 9; A1 and A2 each represent (1) a hydrogen atom, (2) a halogen atom, (3) an inorganic... | 09/26/1978 |
| 3941873 | Process for the preparation of carbonyl diisocyanate This invention relates to a process for the preparation of carbonyl diisocyanate, CO(NCO)2, which comprises reacting trichloroisocyanuric acid and/or an alkali metal salt of dichloroisocyanuric acid with phosgene at temperatures of from about 1... | 03/02/1976 |
| 3940450 | Preparation and recovery of ethers Methyl tertiary butyl ether may be recovered from etherification reaction effluent by azeotropic distillation to recover methanol-ether azeotrope overhead which latter is azeotropically distilled in the presence of n-pentane to give pure ether bottoms sub... | 02/24/1976 |
