Today In History
Safety Cap for Medicine Bottle is patented by Ronald Kay.
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 |
| 7148177 | Method for producing alkali metal catalyst and use thereof for the side-chain alklation of alkyl aromatics The invention relates to a process for the preparation of an alkali metal catalyst by mixing an alkali metal with pulverulent, solid potassium carbonate as support, wherein the potassium carbonate has a specific surface area of at least 0.3 m2/g, and to t... | 12/12/2006 |
| 7030285 | Alkylation process A side-chain of a substituted aromatic compound is alkylated by reacting the aromatic compound with an alkylating agent in the presence of a catalyst. The catalyst comprises a restructured smectite clay to which basic ions are incorporated by ion-exchange. The restr... | 04/18/2006 |
| 6414207 | Preparation of a basic catalyst avoiding high temperatures A catalyst comprising at least one alkali metal and at least one metallic or semimetallic promoter selected from the group consisting of Ca, Sr, Ba, Ag, Au, Zn, Cd, Hg, In, Tl, Sn, As, Sb and Bi, on a support which may be doped with one or more compounds ... | 07/02/2002 |
| 6403852 | Process for producing alkenyl-substituted aromatic hydrocarbons There are provided a process for producing an alkenyl-substituted aromatic hydrocarbon by alkenylation of an alkyl-substituted aromatic hydrocarbon having a hydrogen atom at the -position of a side chain thereof with a conjugated diene, using a cat... | 06/11/2002 |
| 6137020 | Alkylation process with reduced heavy residue A process for reducing the amount of undesirable byproducts, for example multi-ring compounds known as heavy residue in a process for the alkylation of an aromatic hydrocarbon with an olefin using a silicalite catalyst is disclosed. The process comprises ... | 10/24/2000 |
| 6037512 | Dismutation and/or transalkylation of alkylaromatic hydrocarbons using a mazzite type zeolite The invention concerns the use of a catalyst for the dismutation of alkylaromatic hydrocarbons, and preferably for the dismutation of toluene to produce benzene and xylenes, and/or for the transalkylation of alkylaromatic hydrocarbons, preferably for the ... | 03/14/2000 |
| 6024897 | Process for the preparation of benzyl-metal compounds and process for the preparation of 4-phenyl-1-butenes by the use of the same There is disclosed a method of preparing benzyl metal compounds represented by general formula (2), comprising reacting a phenyl metal compound represented by general formula (1) with toluene, in the presence of a catalytic amount of amine. According to t... | 02/15/2000 |
| 6008422 | Alkylation process using interbed recycling of cooled reactor effluent A process for producing alkylaromatics using a multibed alkylation reaction zone is disclosed. The alkylation reaction zone effluent is divided into three portions, the first being recirculated to the inlet of the reaction zone, the second being cooled an... | 12/28/1999 |
| 5659097 | Process for producing a monoalkenyl aromatic hydrocarbon compound A process for producing a monoalkenyl aromatic hydrocarbon which comprises alkenylating a side chain of an aromatic hydrocarbon compound having at least one hydrogen atom at the -position of a side chain (such as o-xylene) with a conjugated diene h... | 08/19/1997 |
| 5625102 | Method of alkylating the side chain of alkyl-substituted aromatic hydrocarbons A method of alkylating the side chain of alkyl-substituted aromatic hydrocarbons. The method comprises the steps of thermally treating an alumina by calcining in air and then degassing under vacuum to prepare an alumina carrier, loading an alkali metal on... | 04/29/1997 |
| 5608132 | Method of alkylating the side chain of alkyl-substituted aromatic hydrocarbons A method of alkylating a side chain of alkyl-substituted aromatic hydrocarbons. The method involves the steps of loading an alkali metal on a thermally treated hydrotalcite carrier represented by formula (I) by an impregnation method using the alkali meta... | 03/04/1997 |
| 5600048 | Continuous process for preparing ethylbenzene using liquid phase alkylation and vapor phase transalkylation There is provided a process for preparing ethylbenzene using liquid phase alkylation and vapor phase transalkylation. The liquid phase alkylation reaction may be catalyzed by an acidic solid oxide, such as MCM-22, MCM-49 and MCM-56. The vapor phase transa... | 02/04/1997 |
| 5557024 | Process for preparing short chain alkyl aromatic compounds Relatively short chain alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a relatively short chain alkylating agent under sufficient reaction conditions in the presence of a catalyst comprising zeolite MCM-56. The li... | 09/17/1996 |
| 5545788 | Process for the alkylation of benzene-rich reformate using MCM-49 The present invention relates to a process for alkylating a reformate feedstream containing benzene, toluene, xylenes, and ethylbenzene, said process comprising: 1) contacting said reformate feedstream with a hydrocarbon stream comprising C2 -C... | 08/13/1996 |
| 5453554 | Process for preparing short chain alkyl aromatic compounds Relatively short chain alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a relatively short chain alkylating agent under sufficient reaction conditions in the presence of a catalyst comprising zeolite MCM-56. The li... | 09/26/1995 |
| 5444172 | Process for producing a monoalkenyl aromatic hydrocarbon compound There is disclosed a process for producing a monoalkenylbenzene which comprises alkenylating a side chain of an aromatic hydrocarbon compound having at least one hydrogen atom bonded at -position of the side chain (such as xylene) with a conjugated... | 08/22/1995 |
| 5436381 | Process for producing a monoalkenyl aromatic hydrocarbon compound There is disclosed a process for producing a monoalkenylbenzene which comprises alkenylating a side chain of an aromatic hydrocarbon compound having at least one hydrogen atom bonded at -position of the side chain (such as xylene) with a conjugated... | 07/25/1995 |
| 5371310 | Process for preparing short chain alkyl aromatic compounds Relatively short chain alkyl aromatic compounds are prepared by alkylating or transalkylating an alkylatable aromatic compound with a relatively short chain alkylating or transalkylating agent under sufficient reaction conditions in the presence of cataly... | 12/06/1994 |
| 5347062 | Process for preparing alkyl-substituted aromatic hydrocarbons An alkyl-substituted hydrocarbon is prepared by alkylating an aromatic hydrocarbon having at least one hydrogen atom at an alpha-position in a side chain with an olefin in the presence of a solid base which is obtainable by heating an alumina, an alkali m... | 09/13/1994 |
| 5344806 | Process for producing monoalkenyl aromatic hydrocarbon compound There is disclosed a process for producing a monoalkenyl aromatic hydrocarbon compound which comprises alkenylating a side chain of an aromatic hydrocarbon compound having at least one hydrogen atom bonded at -position of the side chain (such as xy... | 09/06/1994 |
| 5334795 | Production of ethylbenzene Ethylbenzene is produced by the alkylation of benzene with ethylene in the presence of an alkylation catalyst having a particular structure defined by its X-ray diffraction pattern. A preferred catalyst is the zeolite MCM-22. The process is typically carr... | 08/02/1994 |
| 5324877 | Alkylation and transalkylation processes using a hydrated catalyst A composition useful for catalyzing alkylation and transalkylation reactions comprises a molecular sieve having alkylation and/or transalkylation activity, an inorganic refractory oxide component and greater than 3.5 weight percent water. Such a catalyst ... | 06/28/1994 |
| 5321181 | Alkylation of organic aromatic compounds Aromatic compounds are alkylated in a catalytic distillation, wherein the catalyst structure also serves as a distillation component by contacting the aromatic compound with a C2 to C10 olefin in the catalyst bed under 0.25 to 50 atm... | 06/14/1994 |
| 5227559 | Process for preparing alkyl-subtituted aromatic hydrocarbons An alkyl-substituted hydrocarbon is prepared by alkylating an aromatic hydrocarbon having at least one hydrogen atom at an alpha-position in a side chain with an olefin in the presence of a solid base which is obtainable by heating an alumina, an alkali m... | 07/13/1993 |
| 5202515 | Process for preparing alkyl-substituted aromatic hydrocarbons An alkyl-substituted hydrocarbon is prepared by alkylating an alkyl aromatic hydrocarbon having at least one hydrogen atom at an alpha-position in a side chain with an olefin in the presence of a solid base which is obtainable by heating and reacting an a... | 04/13/1993 |
| 5196623 | Aromatic alkylation process employing zeolite omega catalyst A process is provided for the alkylation of aromatic substrates with a C2 -C4 alkylating agent over an alkylation catalyst comprising zeolite omega at moderate temperature and pressure conditions to provide liquid phase conditions. T... | 03/23/1993 |
| 5157186 | Process for catalytic coupling of an alkene with an aromatic hydrocarbon A process of using a catalyst composition having enhanced effectiveness in coupling an alkene with an aromatic hydrocarbon having an active hydrogen on a saturated -carbon is accomplished with a catalyst obtained by treating an alkali metal with an... | 10/20/1992 |
| 5118896 | Aromatic alkylation process using large macropore, small particle size, zeolite catalyst An aromatic alkylation process comprising the steps of contacting a hydrocarbon feed comprising an aromatic hydrocarbon with an alkylating agent under liquid phase alkylation condition in the presence of a silica-containing molecular sieve wherein said sa... | 06/02/1992 |
| 5097088 | Process for preparing alkyl-substituted aromatic hydrocarbon An alkyl-substituted hydrocarbon is prepared by alkylating an alkylaromatic hydrocarbon having at least one hydrogen atom on an alpha-carbon in a side chain with an olefin in the presence of a solid base which is obtainable by treating an alumina with at ... | 03/17/1992 |
| 5087784 | Aromatic alkylation process and apparatus An aromatic alkylation process comprising continuously feeding catalyst particles through at least one substantially vertically-positioned permeable tube disposed in a vessel surrounding said permeable tube, contacting said catalyst particles with at leas... | 02/11/1992 |
| 5081323 | Liquid phase alkylation or transalkylation process using zeolite beta A process for the alkylation or transalkylation of an aromatic hydrocarbon which comprises contacting the aromatic hydrocarbon with a C2 to C4 olefin alkylating agent or a polyalkyl aromatic hydrocarbon transalkylating agent, under a... | 01/14/1992 |
| 5043507 | Process for preparing alkyl-substituted aromatic hydrocarbons An alkyl-substituted hydrocarbon is prepared by alkylating an alkyl aromatic hydrocarbon having at least one hydrogen atom at an alpha-position in a side chain with an olefin in the presence of a solid base which is obtainable by reacting an alumina with ... | 08/27/1991 |
| 5015796 | Methyl alkylation of toluene using basic zeolite catalysts This invention relates to a process for the alkylation of methylbenzene to produce ethylbenzene and styrene. In this process methylbenzene and methanol are contacted with a catalyst formed from a zeolite and an alkali(ne earth) metal compound wherein said... | 05/14/1991 |
| 5004841 | Alkylation of aromatic compounds to alkylates enriched in the linear-substituted isomers Aromatic compounds, such as benzene or biphenyl, are alkylated with an alkylating agent having from one to eight carbons atoms, such as propylene, in the presence of an acidic mordenite zeolite catalyst under conditions sufficient to produce a mixture of ... | 04/02/1991 |
| 4982035 | Coupling process An alkene selected from ethene, propene, and mixtures thereof is coupled with an aromatic hydrocarbon having an active hydrogen on a saturated alpha-carbon in the presence of a supported potassium or potassium alloy as a catalyst and cesium oxide as a co-... | 01/01/1991 |
| 4962254 | Process for preparing alkyl-substituted aromatic hydrocarbons An alkyl-substituted hydrocarbon is prepared by alkylating an alkyl aromatic hydrocarbon having at least one hydrogen atom at an alpha-position in a side chain with an olefin in the presence of a solid base which is obtainable by heating an alumina, an al... | 10/09/1990 |
| 4950831 | Coupling process An alkene is coupled with an aromatic hydrocarbon having an active hydrogen on a saturated alpha-carbon in the presence of an unsupported alkali metal as a catalyst under high shear agitation conditions. In preferred embodiments of the invention, the alke... | 08/21/1990 |
| 4929783 | Coupling process An alkene selected from ethene, propene, and mixtures thereof is coupled with an aromatic hydrocarbon having an active hydrogen on a saturated alpha-carbon in the presence of a supported potassium or potassium alloy as a catalyst and an alkaline earth met... | 05/29/1990 |
| 4922054 | Coupling process An alkene selected from ethene, propene, and mixtures thereof is coupled with an aromatic hydrocarbon having an active hydrogen on a saturated alpha-carbon in the presence of a supported potassium or potassium alloy as a catalyst and sodium oxide, potassi... | 05/01/1990 |
| 4914251 | Catalyst system for alkylating alkyl aromatics with olefins, procedure for preparing the catalyst, and procedure for carrying out the alkylating The present invention concerns a catalyst for alkylation of alkyl aromatics with olefins, i.e. alkylating toluene, a procedure for the production of the catalyst, and a procedure for carrying out the alkylating of the toluene. The catalyst system contains... | 04/03/1990 |
