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| Number | Title | Issue Date |
| 4830635 | Production of liquid hydrocarbon and ether mixtures An etherification process for reacting a hydrocarbon mixture containing C4 -C7 iso-olefins with excess methanol to produce tertiary alkyl methyl ethers. The improved technique comprises operations for separating etherification reacti... | 05/16/1989 |
| 4831195 | Production of ethers from methanol Processes and apparatus for converting methanol or the like to intermediate olefins and etherification products, such as methyl t-butyl ether by extracting crude methanol feedstock with an olefinic liquid hydrocarbon stream containing C4 + iso-... | 05/16/1989 |
| 4827045 | Etherification of extracted crude methanol and conversion of raffinate An improved process for reacting crude aqueous methanol feedstock with iso-olefinic hydrocarbons to produce C5+ methyl tertiary-alkly ethers, which comprises: contacting the aqueous methanol feedstock with a liquid hydrocarbon extra... | 05/02/1989 |
| 4827046 | Extraction of crude methanol and conversion of raffinate An improved process for reacting crude aqueous methanol feedstock with tertiary-olefinic hydrocarbons to produce C5+ methyl tertiary-alkyl ethers, which comprises: contacting the aqueous methanol feedstock with a liquid hydrocarbon ... | 05/02/1989 |
| 4826507 | Integrated etherification and oxygenates to gasoline process An integrated once through process for the production of ether-rich liquid fuels containing MTBE and TAME by etherifying a hydrocarbon feedstock containing C4 + isoalkenes in the presence of a high stoichiometric excess of lower alkyl alcohol. ... | 05/02/1989 |
| 4820877 | Etherification process improvement An improved etherification process is described for the manufacture of methyl tertiary alkyl ethers such as methyl tertiary butyl ether and methyl tertiary amyl ether. In one embodiment etherification is conducted in the presence of a large excess of meth... | 04/11/1989 |
| 4816607 | Integrated etherification process with recycle post treatment A multistep hydrocarbon conversion process for the production of ethers including methyl tertiary butyl ether (MTBE) from light paraffins and alcohols is disclosed. A mixture of C4 isoparaffins, normal paraffins, an etherification recycle and b... | 03/28/1989 |
| 4814517 | Oxygenate removal in MTBE production Low concentrations of methanol and dimethyl ether in distillation column C4 -C5 raffinate produced in the formation of methyl tert.-alkyl ethers by the reaction of methanol with isoalkylenes are effectively removed from the residual ... | 03/21/1989 |
| 4814519 | Production of ethers from olefins A process for the production of ethers from an olefin containing feedstock. The process includes two-stages for the production of ethers which comprises, in a first stage, isomerizing an olefin containing feedstock over a thermally stable layered metal ox... | 03/21/1989 |
| 4808270 | Process and apparatus for the preparation of ether For the preparation of an ether, e.g., tertiary amyl methyl ether, an olefin-containing feed stream is catalytically etherified with an alcohol, e.g., methyl alcohol. The etherification product is fractionally distilled into an overhead fraction containin... | 02/28/1989 |
| 4806695 | Process for etherification of a dehydrogenation zone effluent A combined process for the dehydrogenation of C3 -C5 paraffins in a first zone and the conversion of olefins in a second zone improves efficiency by directly charging all but the lightest components of the dehydrogenation zone efflue... | 02/21/1989 |
| 4797133 | Process for recovery of butene-1 from mixed C4 hydrocarbons A process is disclosed for the recovery of butene-1 from a mixed C4 feed stream which also contains isobutylene, butene-2, isobutane and normal butane. The C4 feed stream is passed through an etherification reaction zone wherein isob... | 01/10/1989 |
| 4792639 | Process for the production of methyl ethers from branched monoolefins An improved process for the production of methyl ethers of the type in which methanol is reacted with a branched monoolefin in the presence of a catalytically effective amount of one or more acid catalyst, said improvements comprising carrying out said re... | 12/20/1988 |
| 4788365 | High octane gasoline and distillates from oxygenates An integrated process for the conversion of methanol to high octane gasoline and distillate. Methanol is converted to olefins in the presence of zeolite type catalyst. C4 and C5 olefin fraction is converted to MTBE and TAME in the pr... | 11/29/1988 |
| 4778943 | Skeletal isomerization of olefins over halogen-containing alkaline earth oxide catalysts A process for the skeletal isomerization of olefins wherein the olefins are contacted with a catalyst comprising at least one alkaline earth oxide which has been treated with a halogen compound.... | 10/18/1988 |
| 4774365 | Pervaporation process for separating alcohols from ethers The present invention is an improved process for separating alcohols from ethers and/or hydrocarbon raffinate in an etherification process. The excess alcohol reactant, which forms azeotrope mixtures with the product ethers and C4 -C7 | 09/27/1988 |
| 4774364 | Integrated alkylation/alkyl tertiary-alkyl ether synthesis process A process is disclosed for the preparation of alkyl tertiary-alkyl ether concurrent with the alkylation of isoparaffins with olefins. The composite zeolite catalyst is reactivated in the alkyl tertiary-alkyl ether synthesis reactor.... | 09/27/1988 |
| 4761504 | Integrated process for high octane alkylation and etherification A process is disclosed for the simultaneous alkylation of light hydrocarbons to produce gasoline blending components and the etherification of an isoolefin to produce an ether. The etherification zone effluent stream contains normal olefins and isoparaffi... | 08/02/1988 |
| 4760210 | Partial oxidation system Method and apparatus for partial oxidation of hydrocarbonaceous gases, wherein a hydrocarbonaceous gas is preheated, reacted with oxygen, and quenched by means of a rotating matrix comprising glassy ceramic fibers. Such a rotating matrix may be constructe... | 07/26/1988 |
| 4754078 | Integrated etherification process with isomerization pretreatment A multistep hydrocarbon conversion process for the production of ethers including methyl tertiary butyl ether (MTBE) from light paraffins and alcohols is disclosed. A mixture of C4 isoparaffins, normal paraffins, an etherification recycle and b... | 06/28/1988 |
| 4749816 | Chemical process A process for preparing an acetal or a ketal comprises contacting an olefin with an alcohol at elevated temperature in the presence of a dihydrocarbyl peroxide and a catalyst comprising palladium and a copper compound. The process is preferably carried ou... | 06/07/1988 |
| 4748281 | Recovery of methanol in an MTBE process An adsorbent is used to recover methanol in unreacted C4 's from the MTBE process. Methanol is desorbed from the mixture in a closed loop regeneration system utilizing a circulating vapor at an elevated temperature. Gas from the adsorber is coo... | 05/31/1988 |
| 4740632 | Process for removing methanol from alkylation unit feed stream A process of removing methanol from a mixed stream comprising methanol and at least one hydrocarbon and utilizing the hydrocarbon as feed for an acid catalyzed alkylation unit which produces a spent acid stream is provided. The process is comprised of the... | 04/26/1988 |
| 4740631 | Process for preparing ethers In the process for preparing methyl tert.-alkyl ether comprising the steps of (a) contacting and reacting in the liquid phase a reaction mixture formed by combining a stream consisting essentially of C4 -C5 hydrocarbons and containin... | 04/26/1988 |
| 4731490 | Process for methyl, tertiary butyl ether production A process for the production of methyl tertiary butyl ether comprising dimerizing ethylene to form a first butene-containing material; isomerizing the first butene-containing material to produce a second butene-containing material including an increased a... | 03/15/1988 |
| 4731489 | Process for production of gasoline blending stock A process for producing a gasoline blending stock of methyl tertiary butyl ether and tertiary butyl alcohol wherein a first catalytic etherification of isobutene and methanol produces methyl tertiary butyl ether and unreacted methanol. The etherification ... | 03/15/1988 |
| 4714788 | Tertiary olefin process In a process for separating C4 to C7 tertiary mono-olefins(s) present in a C4 to C7 hydrocarbon mixture containing diolefins which comprises selectively reacting said tertiary mono-olefin mixture with a primary ... | 12/22/1987 |
| 4714787 | Production of ethers from linear olefins A catalytic process is provided for the manufacture of ethers by reacting a linear monoolefin with a primary or secondary alcohol having up to 4 carbon atoms. The process selectively forms methyl isopropyl ether from a propylene feed and methanol by conta... | 12/22/1987 |
| 4709101 | Process for the production of methyl ethers from branched monoolefins An improved process for the production of methyl ethers of the type in which methanol is reacted with a branched monoolefin in the presence of a catalytically effective amount of one or more acid catalyst, said improvements comprising carrying out said re... | 11/24/1987 |
| 4695662 | Light paraffin dehydrogenation process A process is disclosed for the catalytic dehydrogenation of propane or butanes. The vapor phase reaction zone effluent stream is contacted with a heavy absorption liquid and then with a light absorption liquid. The light absorption liquid is composed of h... | 09/22/1987 |
| 4684757 | Process for converting methanol to alkyl ethers, gasoline, distillate and alkylate liquid hydrocarbons A multistage process for producing ethers from lower aliphatic oxygenate feedstock, such as methanol. Feedstock is catalytically converted in a primary catalyst stage at elevated temperature in contact with zeolite catalyst to predominantly C2 ... | 08/04/1987 |
| 4664675 | Process for upgrading olefinic gasolines by etherification The invention concerns a process for upgrading olefinic gasolines containing C5 hydrocarbons, but free of C4 hydrocarbons, by etherification. It is characterized in that the tertiary olefins of the charge are reacted (1 and 2) with m... | 05/12/1987 |
| 4665237 | Process for producing methyl tertiary butyl ether A process for producing methyl tertiary butyl ether is disclosed, comprising reacting isobutylene and methanol using a hydrocarbon mixture of 4 carbon atoms containing isobutylene and methanol as starting materials in a reaction zone containing an acidic ... | 05/12/1987 |
| 4665220 | Use of stabilized pillared interlayered clays as catalysts in reactions capable of catalysis by protons A method for carrying out processes capable of catalysis by protons using as catalyst a stabilized pillared interlayered clay.... | 05/12/1987 |
| 4647703 | Process for producing a hydrocarbon cut of high octane number by etherification of olefins Process for producing a hydrocarbon cut of high octane number by etherification of an olefin-containing hydrocarbon cut. The olefinic cut, to which methanol is added, passes into an etherification reactor (1) wherefrom are separated (3) a bottom product (15) c... | 03/03/1987 |
| 4624748 | Catalyst system for use in a distillation column reactor A novel catalyst system for use in a distillation column reactor is disclosed including annularly-defined spaces within the reactor comprised of vapor-permeable material with packed catalyst and alternately positioned vapor barrier means.... | 11/25/1986 |
| 4605787 | Process for the preparation of alkyl tert-alkyl ethers Process for the preparation of alkyl tert-alkyl ethers which comprises reacting a primary alcohol with an olefin having a double bond on a tertiary carbon atom in the presence of an acidic zeolite catalyst. Removal of any excess alcohol from the reaction ... | 08/12/1986 |
| 4605806 | Proton-catalyzed reactions catalyzed by hydrogen ion-exchanged layered clays The invention relates to the use of hydrogen ion-exchanged layered clays in organic reactions which are catalyzed by protons. Such organic reactions include the production of ethers by the reaction of an alcohol with an olefin or an olefin oxide, the prod... | 08/12/1986 |
| 4603225 | Process for separating dimethyl ether from a hydrocarbon mixture containing the same A process for separating dimethyl ether from a hydrocarbon mixture which comprises contacting the hydrocarbon mixture with an aqueous solution containing a polar oxygenated hydrocarbon having a polarity of about 1.4 to about 2.0 Debyes.... | 07/29/1986 |
| 4593135 | Method for promoting the activity and/or extending the life of cation-exchangeable layered clay catalysts in proton-catalyzed reactions A method for promoting the activity and/or extending the life of a cation-exchangeable layered clay catalyst in reactions susceptible to catalysis by protons which method comprises the addition to the catalyst of water as the sole additive. The quantity o... | 06/03/1986 |
