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Matches 551 - 600 out of 4,438

Document Document Title
WO/1994/013400A1
The surface area of a zinc oxide composition is increased, and stabilized to heating, by incorporation of a tri or tetravalent metal, especially aluminium or gallium, e.g. in the form of a spinel with the zinc oxide. The composition is p...  
WO/1994/011460A1
Refrigerant compositions include mixtures of 1,1,2-trifluoroethane and a second component wherein the second component is (CF3)2NF, (CF3)3N, N(CHF2)2(CF3), N(CH2F)(CF3)2, SF5CF2H, SF5C2F5, HFC-236ca, HFC-236cb, HFC-236ea, HFC-254cb, HFC-...  
WO/1994/008899A1
The present invention relates to new crystalline zeolite SSZ-35 prepared by processes for preparing crystalline molecular sieves, particularly large pore zeolites, using conformationally constrained aza-polycyclic ring system templating ...  
WO/1994/009083A1
Refrigerant compositions include mixtures of bis(difluoromethyl) ether and a second component wherein the second component is 1-trifluoromethoxy-1,1,2,2-tetrafluoroethane, difluoromethoxy pentafluoroethane, 1-trifluoromethoxy-1,2,2,2-tet...  
WO/1994/009082A1
Substantially constant boiling compositions that are mixtures of difluoromethane and propane that are useful as refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, and expansion agents ...  
WO/1994/003415A1
A process for alkylating an olefin with an isoparaffin comprising contacting an olefin-containing feed with an isoparaffin-containing feed in the presence of crystalline microporous materials such as MCM-22, MCM-36, and MCM-49, under alk...  
WO/1994/002243A1
This invention is directed to a catalyst system for use in the alkylation of isoparaffin with olefins. More specifically, this invention is directed to an improved catalyst system containing specified amounts of water and a component of ...  
WO/1994/002564A1
Refrigerant compositions include mixtures of pentafluorodimethyl ether and a second component, wherein the second component is ammonia, dimethyl ether, cyclopropane, propane or propylene. The invention also relates to azeotropic or azeot...  
WO/1993/025501A1
A process for isoparaffin-olefin alkylation is provided that permits the use of solid catalysts which require frequent regeneration and high isoparaffin/olefin ratios. The process comprises circulating in a reactor (10) a slurry comprisi...  
WO/1993/024214A1
A supported catalyst comprising a carbon fibril aggregate and a catalytically effective amount of a catalyst supported therein, a process for performing a catalytic reaction in fluid phase using the supported catalyst and a process for m...  
WO/1993/024428A1
The invention concerns a method for the production of light C¿2+?-hydrocarbons, in particular ethylene and ethane, from cracked gas, in particular from a gas produced by a fluid catalytic cracking process. The invention proposes that th...  
WO/1993/019025A1
The present invention provides a process for alkylation of an isoparaffin with an olefin in the presence of acid catalyst composition comprising from 50 to 80 weight percent hydrofluoric acid, from 20 to 50 weight percent sulfolane, and ...  
WO/1993/015162A1
Compositions comprising difluoromethane, 1,1,1,2-tetrafluoroethane and a member selected from the group consisting of 1,1-difluoroethane, 1,1,1-trifluoroethane, propane and dimethyl ether having a vapor pressure from about 12.2 psia to a...  
WO/1993/011090A1
In a process for the isomerization of C4 and higher molecular weight hydrocarbons, preferably C4 to C6 paraffins with high C6 cyclics content, a C5 to C6 hydrocarbon stream is isomerized in a first isomerization reaction zone (80) and a ...  
WO/1993/010065A1
This invention is a process for the regeneration of solid acidic hydrocarbon conversion catalysts, but particularly certain transition aluminas and zeolites promoted with Lewis acids (preferably BF3) which have been used in the alkylatio...  
WO/1993/008145A1
There is provided a combination process for ring opening of aromatics and cycloaliphatics, as well as isomerization of aliphatics using a feedstream comprising hydrocarbons having 6 carbon atoms and at least two reactors connected in ser...  
WO/1993/006069A1
The 177°-343 °C (350°-650 °F) portion of the product from the oligomerization of light olefins with surface-deactivated shape selective medium pore zeolite catalyst comprises olefinic hydrocarbons having unique and desirable structur...  
WO1992017428A3  
WO/1993/002157A1
A hydrogenation process for reducing the unsaturation of lubricants uses a catalyst which is based on an ultra-large pore crystalline material. The crystalline material has pores of at least 1.3 nm (13 Å) diameter arranged in a uniform ...  
WO/1993/000164A1
This invention is a process for the regeneration of a catalyst system component comprising certain transition aluminas promoted with a Lewis acid (preferably BF3) which have been used in the alkylation of isoparaffin with olefins. The pr...  
WO/1993/000314A1
The invention provides a method for increasing rainout from an autorefrigerated vaporous cloud containing hydrofluoric acid formed from the escape of hydrofluoric acid from its containment facility comprising admixing from about 50 to ab...  
WO/1992/021637A1
A process for the alkylation of at least one olefin with at least one paraffin in the presence of an alkylation catalyst to produce alkylates wherein the at least one olefin is alkylated with at least one paraffin in the presence of a sl...  
WO/1992/020431A1
A system and method for separating acid gas from natural gas which utilizes a hybrid membrane system comprising a hydrogen sulfide membrane assembly, an acid gas membrane assembly, and, optionally, a dehydration membrane assembly. This h...  
WO/1992/017427A1
The separation of aromatic hydrocarbons from mixtures of aromatic and non-aromatic hydrocarbon feeds under pervaporation conditions, is improved by the control of the amount of oxygen present in the feed. The amount of oxygen in the feed...  
WO/1992/017428A2
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 contain...  
WO/1992/014738A1
This invention is a process for converting hydrocarbonaceous feeds, particularly lower alkanes, into their corresponding esters and optionally into various intermediates (such as alcohols) and optionally into liquid hydrocarbons. The hyd...  
WO/1992/011935A1
There is provided a method for preparing a pillared, layered crystalline oxide, said method comprising the steps of: (i) forming a zeolite reaction mixture and effecting crystallization of the mixture; (ii) intercepting the crystalline p...  
WO/1992/010289A1
Eta chlorinated alumina-based catalyst comprising platinum and germanium or tin as well as chlorine. For use in a process for isomerizing a normal C4-C6 paraffin-rich filler without hydrogen recycling.  
WO/1992/004977A1
This invention is to: a) a catalyst system, b) a component of that system comprising certain transition aluminas promoted with a Lewis acid (preferably BF¿3?), and c) a catalytic process for the alkylation of isoparaffin with olefins. T...  
WO/1992/003395A1
The present invention provides a Lewis acid-catalyzed isoparaffin/olefin alkylation process in which acid consumption and energy costs are decreased by employing an acid sorption stage (70) to separate the Lewis acid catalyst (91) from t...  
WO/1992/003396A1
A process for isomerizing a paraffin having 4 to 10 carbon atoms comprises contacting the paraffin with a catalyst composition comprising a dehydrogenation/hydrogenation metal and a zeolite which exhibits the X-ray diffraction pattern of...  
WO/1992/000261A1
A method of removing sulfur components from a hydrocarbon stream which involves contacting a hydrocarbon stream including an initial amount of at least one sulfur species selected from the group consisting of mercaptans, organic sulfides...  
WO/1991/016283A1
A process for alkylating an aliphatic hydrocarbon having isobutane with an alkenyl hydrocarbon with isobutylene in the presence of a liquid onium polyhydrogen fluoride complex as the reaction medium and catalyst at a temperature between ...  
WO/1991/014500A1
The present invention relates to ceramic materials containing a homogeneous dispersion of one or more metals, particularly sol-gel ceramic materials, a method of preparing the same, and processes for hydrogenating or oxidizing organic co...  
WO/1991/013860A1
An improved coupling step of an alpha-APM manufacturing process is disclosed. The solvents in the coupling step are adjusted in one of two ways to improve the alpha- to beta- isomer ratio of the product of the coupling step, alpha,beta p...  
WO/1991/011412A1
The alkylation of an isoparaffin with an olefin to provide alkylate is carried out in the presence of, as catalyst, a zeolite having the above X-ray diffraction lines.  
WO/1991/010632A1
Alkali metal doped double perovskites containing manganese and at least one of cobalt, iron and nickel are useful in the oxidative coupling of alkane to higher hydrocarbons.  
WO/1991/009608A1
A pharmaceutical preparation for controlling pathogenic microorganisms causing diarrhoea and other gastrointestinal troubles in man and in animals contains Streptococcus lactis strain LIa in at least one pharmaceutically acceptable carri...  
WO/1991/004970A1
A process for preparing a compound containing (a) peroxyacetal lactone, (b) peroxyacetal lactol or (c) peroxyacetal ether functionality comprising oxygenating in the presence of one or more oxidizing metal catalysts a compound containing...  
WO/1991/004241A1
Oxidative coupling of lower alkane to higher hydrocarbon is conducted using supported catalyst comprising at least one of barium hydroxide, strontium hydroxide, barium and strontium carbonate in the presence of halogen component. High yi...  
WO/1991/004237A1
Oxidative coupling of lower alkane to higher hydrocarbon is conducted using supported catalyst comprising an activity promoting amount of at least one cobalt, nickel or rhodium compound and at least one catalytically active Group IA and ...  
WO/1991/004240A1
Perovskites of the structure A2B2C3O10 are useful as catalysts for the oxidative coupling of lower alkane to heavier hydrocarbons. A is alkali metal; B is lanthanide or lanthanum, cerium, neodymium, samarium, praseodymium, gadolinium or ...  
WO/1991/004238A1
Volatilized metal compounds retard vapor phase alkane conversion reactions in oxidative coupling processes that convert lower alkanes to higher hydrocarbons.  
WO/1991/004236A1
Oxidative coupling of lower alkane to higher hydrocarbon is conducted using catalyst comprising barium and/or strontium component and a metal oxide combustion promoter in the presence of vapor phase halogen component. High ethylene to et...  
WO/1991/000777A1
A crystalline low-aluminum boron beta zeolite is prepared using a diquaternary ion as a template.  
WO/1991/000851A1
The present invention is a process and a catalyst for isomerizing normal and slightly branched C4 to C7 hydrocarbons. The catalyst comprises a Group VIII metal on Beta zeolite.  
WO/1991/000141A1
The invention relates to a process and a device for the exchange of material between a gaseous phase (G21, G22) and at least one liquid phase (L21, L22). The process is characterized by the fact that contact with each other of at least a...  
WO/1990/011251A1
Method for producing heavy metal carbides with high specific surface area, characterized in that a gas compound of said metal is reacted with a reactive carbon of high specific surface area of at least 200 m?2¿g?-1¿ at a temperature co...  
WO/1990/002771A1
Azeotrope-like compositions comprising trichlorofluoromethane, dichlorotrifluoroethane and isopentane are novel compositions particularly useful as blowing agents in the preparation of polyurethane and polyisocyanurate foams.  
WO/1990/000534A1
A process for alkylating an isoparaffin containing up to 20 carbon atoms with an olefin containing from 2 to 12 carbon atoms comprises contacting the isoparaffin and olefin with a catalyst comprising a non-zeolitic solid inorganic oxide ...  

Matches 551 - 600 out of 4,438