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| Number | Title | Issue Date |
| 7365152 | Method for producing highly reactive, low halogen polyisobutenes A process is described for preparing polyisobutene having a low halogen content, in which isobutene is polymerized in the presence of a catalyst which comprises a halogenated Lewis acid, the catalyst is removed and/or deactivated, and the resulting polyisobutene is ... | 04/29/2008 |
| 6909022 | Process of removing organic halogen-containing compounds The present invention relates to a process of removing organic halogen-containing compounds from a liquid stream mainly containing one or more of the compounds selected from the group consisting of glycol, water and alcohol, which process involves contacting the str... | 06/21/2005 |
| 6184315 | Process for polymerization in the presence of alpha olefins The polymerization process is carried out starting from a monomer that is introduced via pipe (1) and a comonomer that is introduced via pipe (2); the comonomer that is used, which is an alpha-olefin, is introduced into polymerization reactor P in the for... | 02/06/2001 |
| 6033556 | Process and capture masses for eliminating mercury and arsenic from hydrocarbon-containing cuts The present invention relates to a capture mass comprising an essentially alumina-based extruded support, and constituted by a plurality of juxtaposed agglomerates, optionally at least one oxide or a sulphide of a metal constituted by copper, molybdenum, ... | 03/07/2000 |
| 5866749 | Sulfur and thiol removal from reactive hydrocarbons Sulfur and mercaptans in reactive hydrocarbon streams are removed by contacting the hydrocarbons at mild temperatures with a hydrogen reduced metal oxide such as a hydrogen reduced copper, zinc and/or aluminum oxide.... | 02/02/1999 |
| 5789646 | Process for the purification of medium-chain olefins Medium-chain olefins containing as impurities 2-alkyl substituted isomers having a close boiling point are purified by (i) passing over a solid acid catalyst under mild conditions to selectively double-bond isomerise said impurities, and (ii) separating s... | 08/04/1998 |
| 5463154 | Arsine and phosphines as acetylene converter moderators A method for acetylene hydrogenation which involves adding a member selected from the group consisting of arsine and phosphine to moderate the activity of acetylene hydrogenation catalysts while maintaining acceptable catalyst activity and avoiding the ri... | 10/31/1995 |
| 5396022 | Defluorination of alkane streams An alkane/fluoroalkane feed is treated with an acidic alumina to reduce the amount of fluoroalkane(s) in the feed. In a particularly preferred embodiment, the feed is treated with a sulfur-containing alumina so as to convert a major portion of fluoroalkan... | 03/07/1995 |
| 5378783 | Dicyclopentadiene activation method and polymerization composition A highly polymerizable dicyclopentadiene (DCPD) monomer composition is obtained. The dicyclopentadiene so obtained is highly suitable for ring-opening polymerization by metathesis catalysts. The active DCPD yields articles with excellent physical properti... | 01/03/1995 |
| 5371313 | Purification of hydrocarbon streams A process is provided for the removal of tertiary butyl chloride from a hydrocarbon stream, wherein the hydrocarbon stream is contacted at a temperature of from about 130° to about 170° C. with a particulate calcium oxide containing from 1 to 10 mole % ... | 12/06/1994 |
| 5336835 | Product/process/application for removal of mercury from liquid hydrocarbon Impregnated carbon adsorbents for the removal of mercury from liquid hydrocarbons are used in a variety of applications. The activated carbon impregnated adsorbents in the present invention remain effective in removing mercury. Generally, these activated ... | 08/09/1994 |
| 5322927 | Method for producing polymers Polyolefins are produced by a process which includes the steps of: polymerizing an olefin in a reaction zone; removing unreacted olefin from the polymer in a flash chamber and recycling the unreacted olefin to the reaction zone; stripping unreacted olefin... | 06/21/1994 |
| 5302771 | Process for upgrading the quality of light ends The present invention is directed to a process for removing impurities from hydrocarbon streams, preferably light ends, such as propylene and ethylene, which is preferably in the liquid phase, by contacting the hydrocarbon stream containing an initial amo... | 04/12/1994 |
| 5292991 | Process for removal of hydrocarbons carbon manoxide, and oxides of nitrogen from oxygen-containing waste gas using molecular sieve-palladium-platinum catalyst on a substrate A process of using a catalyst system for the oxidation of hydrocarbons, carbon monoxide, and the reduction of nitrogen oxides is provided. The unique synergy of the catalyst system, a combination of molecular sieves and noble metals, provides a system tha... | 03/08/1994 |
| 5292992 | Process for removing conjugated dienes from alpha-olefins Conjugated diene impurities are removed from linear alpha-olefin products by contacting the linear alpha-olefin product with an acid treated montmorillonite clay which is effective to reduce the conjugated diene content of the linear alpha-olefin product,... | 03/08/1994 |
| 5220100 | Method of removing lithium compounds from a polymer A process for separating an alkali metal or alkali metal compound from a polymer comprising a conjugated diolefin and/or an alkenyl aromatic hydrocarbon monomer wherein a polymer and one or more alkali metal compounds is contacted with a suitable solid ad... | 06/15/1993 |
| 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 |
| 5157204 | Removal of impurities from hydrocarbon feeds A process for removing carbon monoxide and free oxygen from hydrocarbon-containing fluids comprises contacting the fluid feed with at least one of several supported platinum-containing catalyst compositions so as to convert carbon monoxide and free oxygen... | 10/20/1992 |
| 5146041 | Method of separating isobutylene from a C-4 hydrocarbon fraction using montmorillonite catalysts Disclosed is a two-step method for separating isobutylene from a C-4 hydrocarbon fraction comprising: a) Reacting the C-4 fraction with a glycol in the presence of an acidic montmorillonite catalyst at a temperature of about 60° to 160° C. to yield the ... | 09/08/1992 |
| 5130109 | Catalyst composition containing segregated platinum and rhodium components A catalyst composition suitable for three-way conversion of internal combustion engine, e.g., automobile gasoline engine, exhaust gases, includes a catalytic material disposed in two discrete coats on a carrier. The first coat includes a stabilized alumin... | 07/14/1992 |
| 5106484 | Purifying feed for reforming over zeolite catalysts The present invention is directed to a process for treating hydrotreated naphtha which involves treating the naphtha over massive nickel catalyst followed by treating the naphtha over a metal oxide under conditions effective for removing impurities from s... | 04/21/1992 |
| 5057644 | Process for the purification of alpha olefins This invention relates to a process for the purification of an alpha olefinic feedstock contaminated with internal olefins which process comprises contacting said alpha olefinic feedstock with ethylene in the presence of a catalyst comprising an organobor... | 10/15/1991 |
| 5035794 | Isoprene recovery in the butyl rubber process A method for removing a tertiary halide from an olefin hydrocarbon stream which comprises contacting the hydrocarbon stream with activated alumina at a temperature of about -40° to about 120° C.... | 07/30/1991 |
| 5025112 | Purification of cumene recycle streams A method for purifying a cumene recycle stream by removing 2-phenyl-2-propanol and cumene hydroperoxide before the cumene is distilled and recycled to the peroxidation reactor which comprises reacting the recycle cumene in the presence of an acid treated ... | 06/18/1991 |
| 4571445 | Process for removal of sulfur compounds from conjugated diolefins A process is disclosed for reducing the level of sulfur compounds from liquid conjugated diolefin hydrocarbons by contacting said sulfur compound-bearing hydrocarbon liquids with sorbents prepared by combining particulate alumina with at least one compoun... | 02/18/1986 |
| 4547620 | Process for removing a halogen component derived from a catalyst from an organic compound containing said halogen component A process for removing a halogen component from a halogen-containing organic compound, which comprises contacting an organic compound in the liquid state which is produced by using a halogen containing catalyst selected from the group consisting of Friede... | 10/15/1985 |
| 4511710 | Halide removal from fluid organic materials Unwanted halogen values are removed from liquid resin, organic or hydrocarbon material by adding particulate crystalline lithium aluminate compounds to the liquid material to act as a halogen scavenger, then separating the crystalline aluminate compound f... | 04/16/1985 |
| 4491516 | Hydrolysis of carbonyl sulfide over alumina The reaction rate for the hydrolysis of carbonyl sulfide in liquid petroleum hydrocarbons over alumina, such as propylene, is greatly increased by maintaining water in the hydrocarbons in an amount of one mole of water per mole of carbonyl sulfide to an u... | 01/01/1985 |
| 4423278 | Removing color from polyphenylated alkane Color may be removed from colored polyphenylated alkane by contacting this material with certain adsorbants. The adsorbants provided comprise certain crystalline zeolites in a silica alumina matrix and bauxite clay having at least one material selected fr... | 12/27/1983 |
| 4353840 | Use of amine-aluminum chloride adducts as alkylation inhibitors in a ligand-complexing process In processes in which liquid sorbents that are solutions in an aromatic hydrocarbon or halogenated aromatic hydrocarbon of a bimetallic salt complex having the generic formula MI MII Xn.Aromatic, wherein MI is a... | 10/12/1982 |
| 4317950 | Use of amine-aluminum chloride adducts as alkylation inhibitors in a ligand-complexing process In processes in which liquid sorbents that are solutions in an aromatic hydrocarbon or halogenated aromatic hydrocarbon of a bimetallic salt complex having the generic formula MI MII Xn.Aromatic, wherein MI is a... | 03/02/1982 |
| 4293728 | Pretreatment of butene-1 in isomerization of it to butene-2 Prior to subjecting a butene-1 containing stream isomerization to produce butene-2 in the presence of a catalyst, e.g., a palladium catalyst, the feedstream is subjected to pretreatment in the presence of a contact mass adapted to remove under pretreatmen... | 10/06/1981 |
| 4266086 | Process for removing -acetylenes from diolefins Conjugated diolefins contaminated with relatively high levels of acetylenic impurities in a hydrocarbon feedstream are purified by a cyclic, liquid phase, predominantly catalytic cracking process which selectively removes alpha-acetylenes in a single pass... | 05/05/1981 |
| 4234751 | Selective cracking of phenylalkanes A process for the production of the internal isomers (3-phenyl, 4-phenyl and higher) from linear phenylalkane mixtures via selective cracking of the 2-phenylalkane isomer over crystalline zeolite catalysts having a silica to alumina ratio of at least abou... | 11/18/1980 |
| 4230897 | Process for selectively hydrogenating a hydrocarbon cut containing at least one diolefinic hydrocarbon and at least one acetylenic hydrocarbon using a palladium catalyst with crystallites of at least 50 angstroms Process for selectively hydrogenating acetylenic hydrocarbons such as vinylacetylene contained in an unsaturated hydrocarbon fraction such as a C4 fraction also containing a diolefinic hydrocarbon such as butadiene, without substantially hydrog... | 10/28/1980 |
| 4205189 | Method for producing 3-alkylphenols and 1,3-dihydroxybenzene Benzene or alkylbenzene (e.g., toluene) is alkylated with propylene to produce diisopropylbenzenes or isopropylalkylbenzenes, which in turn are selectively cracked to remove the 1,4-isomer. The resultant product, containing a high level of the 1,3-isomer,... | 05/27/1980 |
| 4112009 | Method for removing acetylenic compounds from saturated, olefinic and dienic hydrocarbons or mixtures thereof The present invention provides a novel process for the separation of acetylenic compounds from saturated, olefinic and dienic hydrocarbons by etherifying the acetylenic compounds with an acyl compound in the presence of an acid ion - exchange resin contai... | 09/05/1978 |
| 4091045 | Process for the purification of liquid sorbents that comprise bimetallic salt complexes Liquid sorbents that are solutions in an aromatic hydrocarbon or a halogenated aromatic hydrocarbon of a bimetallic salt complex having the generic formula MI MII Xn .multidot.Aromatic, wherein MI is a Group I-B... | 05/23/1978 |
| 4087477 | Method of reducing the -acetylene content of hydrocarbon Hydrocarbon fraction containing diolefins and -acetylenes are treated with base-modified catalyst to reduce the -acetylene content. The base-modified catalyst comprises a support such as alumina containing an alkali metal hydroxide and relat... | 05/02/1978 |
| 4070408 | Aromatics extraction and distillation process An improved aromatics extraction process is disclosed. Key feature of the present invention is use of the fractionator in the hydrodealkylation unit or other unit with a benzene fraction to fractionate not only hydrodealkylated benzene but also extracted ... | 01/24/1978 |
