Did You Know...
...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7291758 | Process for the production of highly reactive polyisobutenes The present invention relates to a process for the production of highly reactive polyisobutenes with a content of terminal vinylidene groupings of greater than 80 mol % and an average molecular weight of 500 to 10,000 Dalton by cationic polymerization of isobutene o... | 11/06/2007 |
| 7148388 | Process for preparing and olefinic hydrocarbon mixture In a process for preparing an olefinic hydrocarbon mixture comprising at least 5% by weight of mono-olefin oligomers of the empirical formula: CnH2n where n is greater than or equal to 6, a feedstock comprising n-butene and... | 12/12/2006 |
| 6084144 | Method of recovering boron trifluoride complex and process for producing olefin oligomer using the same A boron trifluoride complex can be recovered without changing its molar coordination ratio, by applying a direct and/or alternating voltage to an electrically-nonconductive fluid in which at least a part of boron trifluoride complex is dispersed and/or di... | 07/04/2000 |
| 5986155 | Catalytic process for making high reactivity alkylating agents and products resulting therefrom Treating low reactivity alkylating agents in the vapor phase with catalysts converts the low reactivity alkylating agents to high reactivity alkylating agents. The alkylating agents are useful in synthesis of alkyl aromatics with Lewis acid catalysts.... | 11/16/1999 |
| 5705724 | Aromatics alkylation with cracked recycled plastics A process is disclosed for the production of alkylaromatic compounds employing olefinic liquid from thermally or catalytically cracked plastics as alkylating agent. The process comprises contacting a feedstream comprising alkylatable aromatics and the ole... | 01/06/1998 |
| 5488193 | Process for reducing polynuclear aromatic mutagenicity by alkylation A process for reducing the mutagenicity of a polynuclear aromatic containing material containing from three to seven fused aromatic rings, especially a hydrocarbon refinery stream. The process reduces the initial mutagenicity index to a lower value by alk... | 01/30/1996 |
| 5300717 | Process for the preparation of dixylylpropane In a multi-step process, dixylylpropane is obtained inter alia via the hitherto unknown 1,2-dimethyl-4-(-chloroisopropyl)benzene, the readily accessible compounds o-xylene and propene being employed as starting compounds. The process yields the des... | 04/05/1994 |
| 5171915 | Alkylaromatic lubricants from alpha-olefin dimer It is disclosed that aromatic compounds can be alkylated with mono-olefinic HVI-PAO dimer in contact with an acidic catalyst to produce novel alkylated aromatic compositions. It has been found that the novel HVI-PAO dimer alkylated aromatic compositions e... | 12/15/1992 |
| 5132478 | Alkylaromatic lubricant fluids Aromatic compounds are alkylated with C20 -C1300 olefinic oligomers using an acidic alkylation catalyst to produce alkylated aromatic products, usually alkylaromatic hydrocarbons. The olefinic oligomers used as alkylating agents are ... | 07/21/1992 |
| 5107048 | Process for preparing long chain alkyl aromatic compounds employing Lewis acid-promoted amorphous inorganic oxide Aromatic hydrocarbons are alkylated with relatively long chain alkylating agents, e.g., C8 + olefins, at mole ratio of aromatic to alkylating agent of not greater than about 5 in the presence of, as catalyst, a Lewis acid-promoted amorphous, po... | 04/21/1992 |
| 5030785 | Process for preparing long chain alkyl aromatic compounds employing Lewis acid-promoted zeolite catalysts Aromatic hydrocarbons are alkylated with relatively long chain alkylating agents, e.g., C6 + olefins, in the presence of, as catalyst, certain Lewis acid-promoted zeolites to provide long chain aromatic products which are useful, inter alia, as... | 07/09/1991 |
| 4709110 | Catalytic conversion with boron trifluoride treated zeolite A modified ZSM-5 type zeolite is provided by treatment of a ZSM-5 type zeolite with BF3. The novel product is characterized by reduced pore size and enhanced shape-selectivity, or by enhanced activity, or by both. This invention also provides a... | 11/24/1987 |
| 4556750 | Alkylation process In an alkylation process a portion of the alkylating olefin is added to benzene before heating the benzene up to the alkylation reaction temperature.... | 12/03/1985 |
| 4547604 | Selective isopropylation of cumene to meta-diisopropylbenzene Resorcinol is prepared in high yield and purity by an improved process through superacid (such as perfluorinated alkanesulfonic acids of one to eighteen carbon atoms or polymeric perfluorinated resinsulfonic acids, such as acidified Nafion-H, catalyzed cl... | 10/15/1985 |
| 4500418 | Catalysis over activated inorganic oxides A process is provided for conducting organic compound conversion over a catalyst comprising alumina and/or gallia which has been treated by a method which comprises contact with ammonium or boron fluoride reagent, contact with a particular aqueous ammoniu... | 02/19/1985 |
| 4480142 | Catalytic alkylation The alkylation of aromatic compounds with olefins can be conducted more efficiently in the presence of certain catalysts.... | 10/30/1984 |
| 4454366 | Method of recovering and recycling boron trifluoride catalyst Spent boron trifluoride catalyst is removed from organic liquids by contacting the liquid with polyvinyl alcohol. For example, boron trifluoride catalyst is removed from 1-olefin oligomer product by passing the liquid oligomer through a bed of granular po... | 06/12/1984 |
| 4433197 | Removing boron trifluoride from coordination compound contaminants in organic liquids Boron trifluoride is removed from coordination compounds contaminating organic liquids by contacting the contaminated liquid with silica. For example, boron trifluoride is removed from a boron trifluoride-n-butanol coordination compound contaminating a 1-... | 02/21/1984 |
| 4384162 | Removing boron trifluoride contaminant from organic liquids with polyvinyl alcohol Boron trifluoride contaminant is removed from organic liquids by contacting the contaminated liquid with polyvinyl alcohol. For example, boron trifluoride catalyst is removed from 1-olefin oligomer product by passing the liquid oligomer through a bed of g... | 05/17/1983 |
| 4227027 | Recyclable boron trifluoride catalyst and method of using same When saturated with boron trifluoride, certain polyhydric alcohols form adducts which catalyze hydrocarbon alkyl transfer reactions for which boron trifluoride is catalytic. The adduct is recovered from the reaction mixture and recycled, greatly reducing ... | 10/07/1980 |
| 4209654 | Recyclable boron trifluoride catalyst and method of using same When saturated with boron trifluoride, certain polyhydric alcohols form adducts which catalyze reactions for which boron trifluoride is catalytic. The adduct is recovered from the reaction mixture and recycled, greatly reducing boron and fluoride values i... | 06/24/1980 |
| 4158677 | Dialkylation of alkylbenzene Dialkylation process for the manufacture of synthetic oils comprising contacting olefin with alkylbenzene in the presence of a borontrifluoride carboxylic acid complex.... | 06/19/1979 |
| 4100213 | Isomerization with catalyst of graphite containing intercalated acid and fluoride Intercalation of a Lewis acid fluoride in graphite is effected in the presence of gaseous fluorine. The reaction results in new compositions useful as catalysts and as atmospheric pressure containers for normally gaseous Lewis acid fluorides.... | 07/11/1978 |
| 4098833 | Regeneration of hydrocarbon conversion catalysts Hydrocarbon conversion catalysts comprising a metal halide in combination with a Bronsted acid containing fluorine that have become deactivated or partially deactivated by the formation of allyl and alkylaromatic carbonium ion complexes with the acid duri... | 07/04/1978 |
| 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 |
| 4083885 | Alkylation with catalyst of graphite containing intercalated fluoride Intercalation of a Lewis acid fluoride in graphite is effected in the presence of gaseous fluorine. The reaction results in new compositions useful as catalysts and as atmospheric pressure containers for normally gaseous Lewis acid fluorides.... | 04/11/1978 |
| 4079093 | Aromatic hydrocarbon alkylation process A process for the alkylation of an aromatic hydrocarbon with an olefinic hydrocarbon wherein a gaseous catalyst promoter is circulated through the alkylation zone effluent separation equipment including a first fractionation column. Part of the motive for... | 03/14/1978 |
| 4038334 | Fractional distillation pressure control for separation of aromatic alkylation product A pressure control system and method for utilization in a process for effecting the alkylation of an aromatic hydrocarbon with a normally gaseous olefinic feed stream. The system is intended to control the pressure within a fractional distillation column ... | 07/26/1977 |
| 4035434 | Graphite intercalation Intercalation of a Lewis acid fluoride in graphite is effected in the presence of gaseous fluorine. The reaction results in new compositions useful as catalysts and as atmospheric pressure containers for normally gaseous Lewis acid fluorides.... | 07/12/1977 |
| 4009217 | Process for production and dehydrogenation of ethylbenzene Ethylbenzene is produced by the alkylation of benzene and subsequently catalytically dehydrogenated to produce styrene in a process wherein a benzene sidecut stream removed from the fractionation zone separating the newly produced ethylbenzene is water wa... | 02/22/1977 |
| 4008289 | Adsorbent treating method A more economical method of removing materials adsorbed on solid adsorbents used to treat hydrocarbon streams is presented. The method comprises removing a liquid hydrocarbon stream from a distillation column, vaporizing the liquid stream and superheating... | 02/15/1977 |
| 3962133 | Graphite intercalation Intercalation of a Lewis acid fluoride in graphite is effected in the presence of gaseous fluorine. The reaction results in new compositions useful as catalysts and as atmospheric pressure containers for normally gaseous Lewis acid fluorides.... | 06/08/1976 |
