Patent presence previously
of solid treated
containing NH,F and
for reducing olefins
F, especially calcined.
W.H. Verrelst; L.R.M. Martens; G.M.K. Mathys Exxon Chemical Patents, Inc. PCT Int. Appl. 94,29,246, Dec. 22, 1994; U.K. Appl.
binder, at a temperature sure to -1,000 psig.
The average degree of branching of a branched olefin feedstock is reduced by skeletal isomerization in contact with a molecular sieve catalyst having a IO-membered ring pore structure, for example zeolite H-ZSM-22.
Production D.C. Dow U.S.
Molzahn; Chemical 5,387,708,
M.E. Jones; G.E. Hartwell Co. Feb. 7, 1995; Appl. Dec.
T. Fuchigami; N. Wakasa; T. Ka et al. Tosoh Corp; Sagami Chemical Research Jpn. Kokai Tokkyo Koho 95,17,959, Jan. 1993
of high purity
K. Kamimura; J. Ookawa; Sumitomo Seika K.K. Jpn. Kokai Tokkyo Koho 1993
High purity CO is manufactured by thermal decomposition of formic acid using a zeolite catalyst in the presence of a mineral acid. CO containing only a small amount of H is manufactured with high conversion.
A. Carati; C. Flego; V. Calemma Eniricerche S.p.A; Agip Petroli S.p.A Eur. Pat. Appl. 635,556, Jan. 25, 1995;
This is a process for the hydroisomerization of n-paraffins in the presence of a difunctional catalyst which comprises a porous crystalline material isostructural with zeolite 8 selected from borosilicates or boroaluminosilicates in which the SiO,/AI,O, molar ratio is higher than 3OO:l; and one or more metal(s) belonging to group VIIIA, selected from platinum and palladium (0.05-5% by wt).
One-step synthesis of alkyl tertiary-alkyl ethers tiary-butanol using pentasil zeolite catalysts J.F. Knifton; P.-SE. Dai Texaco Chemical Co. U.S. 5,387,722, Feb. 7, 1995;
A process is described for preparing especially methyl tertiary-butyl ether, prises reacting tertiary-butanol and a the presence of a catalyst consisting zeolite having a silica/alumina ratio of
J.F. Knifton; P.-SE. Dai Texaco Chemical Co. U.S. 5,387,723, Feb. 7, 1995; Appl. Jan. 12, 1994 A process is described for producing alkyl tertiary-alkyl ethers in one step which comprises reacting tertiary-butanol with an alkanol in the presence of a catalyst which exhibits extended life comprising p-zeolite modified with one or more metals selected from groups IA (especially Li) and IIIB (especially rare earth) of the Periodic Table and continuously contacting the alkanol and tertiary-butanol in a molar amount from -I-10:10-l over the zeolite catalyst at a temperature of -2O-250°C and at a pressure of about atmospheric to -1,000 psig.
Production of dimethyl carbonate by methoxycarbonylation of methanol using copper zeolite catalysts S.S.T. King; M.E. Jones; M.M. Olken Dow Chemical Co. U.S. 5,391,803, Feb. 21, 1995; Appl. Sept. 30, 1992 A process is described for producing dialkyl carbonates which comprises contacting an alkanol, carbon monoxide, and oxygen with a catalyst, the catalyst having been prepared by heating a solid copper compound in the presence of a zeolite (e.g., Y zeolite with a SiO,/AI,O, molar ratio of 12:l) to form a zeolitecontaining copper.
alkyl tertiary-alkyl ethers, in one step which comC,-C, primary alcohol in essentially of a pentasil 50-150, optionally with a
P.-S.E. Dai; R.J. Taylor, Jr.; R.H. Petty et al. Texaco Chemical Co. U.S. 5,391,286, Feb. 21, 1995; Appl. Nov. 3, 1993 The catalyst comprises a surface-modified crystalline aluminosilicate zeolite, such as a ZSM-5-type zeolite in a matrix or binder, such as alumina, having a specified metal content. The process is especially useful for dewaxing lubricating oil basestocks.
One-step synthesis of alkyl tertiary-alkyl tiary-butanol using p-zeolite catalysts
THF is produced by hydrogenation of a succinic acid derivative, y-butyrolactone, or a mixture thereof in the presence of a Ru compound, an organophosphine compound, and a solid acid. The solid acid is an H-type zeolite. This process gives THF in a high yield under milder conditions than previous processes.
A process for the production of dialkyl carbonates such as dimethyl carbonate is described. The process involves contacting under reaction conditions an alkanol such as methanol with carbon monoxide and oxygen in the vapor phase and in the presence of a catalyst containing a copper halide, a copper oxyhalide, or a copper carboxylate halide, and a quaternary ammonium salt, on a zeolite support component (e.g., CuCI/Et,CI on zeolite Y). The catalyst achieves high selectivity and productivity to dialkyl carbonates.
of zeolite f3 with shape-selective for cracking of petroleum distillates
B.O. Brown; T.F. Degnan; Mobil Oil Corp. PCT Int. Appl. 95,02,653,
A cracking catalyst composition for petroleum feedstocks b. >343”C, with increased selectivity to C,-,-alkenes and a C,+gasoline fraction, consists of zeolite 8 and a shape-selective zeolite with a constraint index of 3-12, at a (wt% shape-selective zeolite)/(wt% shape-selective zeolite + zeolite B) ratio of O.Ol0.95 (matrix-free basis). Suitable shape-selective zeolites include ZSM-5, ZSM-11, and Y zeolites.
J. Hinoto; S. Kanejima Asahi Chemical Industries Jpn. Kokai Tokkyo Koho 94,330,055, 19, 1993 A method for the conversion of light containing mainly C2-,* paraffins major components of ethylene and aromatic hydrocarbons comprises carbons with an intermediate pore lyst containing 0.1-10 wt% of 2 one from Cr, MO, W, Fe, Ru, OS, Rh, Ir,
and catalyst by oxidation
hydrocarbon raw materials to lower olefins (containing propylene) and single ring contacting the light hydroaluminosilicate zeolite cataof transition metals selected Ni, Pd. and Pt.
T. Sakurai; T. Iwasaki; E. Shibuya N.E. Chemcat Corp.; NKK Corp. Eur. Pat. Appl. 645,172, Mar. 29, 1995; Jpn. Appl. Sept. 24, 1993 The catalyst comprises a first catalyst from Pt, Pd, and Ir and their oxides, at 0.1-10 g/l catalyst supported on silica-boria-