Patent report

Dehydrocyclisation of acyclic A. Huss; S. Krishnamurthy; W.D. Mobil Oil Corp.

hydrocarbons McHale

U.S. 4,888,105; Dec. 19, 1989; Appl. Feb. 16, 1988 The dehydrocyclization of a feed containing > 1 acyclic hydrocar- bons to provide aromatic hydrocarbons is accomplished by contact- ing the feed with a zeolite L catalyst, which is substantially free of zeolite T and which contains s 1 Group VIII metal component.

Conversion of a hydrocarbon feedstock I.E. Maxwell; J.K. Minderhoud Shell Oil Corp. U.S. 4,886,934, Dec. 12, 1989; U.K. Appl. June 16, 1988

A process for the conversion of paraffins contained in a gas oil or a vacuum gas oil to olefins comprises contacting the gas oil with a ZSM15 zeolite catalyst.

Exhaust gas catalyst containing copper-exchanged zeolite S. Takeshima Toyota Motor Corp. Ger. Offen. 3,912,596, Nov. 23, 1989; Jpn. Appl. Apr. 18, 1988

Exhaust gas catalysts, which remove NO, efficiently even under large excess Oz concentrations such as obtained with lean fuel mixtures are prepared by Cu-exchanging zeolites (ZSM or ferrierite) to produce a supercage having a square configuration of 4 0 atoms and 1 Cu atom. The zeolites are immersed in a Cu acetate or Cu propionate solution, washed, dried, and sintered. The zeolites may be supported on ceramic or metal supports or on cordierite.

Preparation of alicyclic ketone condensates M. Furuya; H. Nakajima Technology Research Association for New Application Develop- ment for Light-Weight Fractions Jpn. Kokia Tokkyo Koho 89,213, 251, Aug. 28, 1989; Appl. Feb 22, 1988

Alicyclic ketone condensates are prepared by using crystalline aluminosilicates (effective pore diameter 6&, e.g., dealuminated Y-type zeolite (H-form, SiOz/Alz08 = 20). as catalysts.

Preparation of 4,4’-dihalobiphenyls A. Botta; H.J. Buysch; L. Puppe Bayer A.-G. Ger. Offen. 3,809,258, Sept. 28, 1989; Appl. Mar. 19, 1988

The title compounds X R CsH3.C6H#X2 (I; R, Rz = H, alkyl, alkoxy, OH, F, Cl, Br; X, X2 = Cl, Br, iodo at the 4.4’ positions) were prepared by halogenation of I (X = H, Cl, Br, iodo; X2 = HI in the presence of a zeolite catalyst, e.g., a WNa-L-zeolite.

lsomerization of dichlorotoluenes K. Iwayama; Y. Mangaya; K. Tada Toray Industries Inc. Jpn Kokai Tokkyo Koho 89,254,633, Oct. 11, 1989: Appl. Apr. 4, 1988

A mixture of isomers MeCsH3Clz was isomerized by treatment with a catalyst containing acid-form zeolites and Ag in the presence of H.

Preparation of aminoethylbenzenes H. Sato; M. Tsuzuki ldemitsu Kosan Co. Ltd. Jpn Kokai Tokkyo Koho 89,272,554, Oct. 31,1989; Appl. Apr. 22, 1988

The title compounds are prepared in high yield and selectively by C-alkylation of anilines with ethylene in the presence of crystalline metal silicates (acidity factor 5 0.3, SiOz/metal (Ill) oxide mol ratio 2 100). e.g., H-type ZSM-5 zeolite.

Preparation of 4-alkoxy- or aryloxy-phenyl ketones A. Botta; H.J. Buysch; L. Puppe et al. Bayer A.-G. Ger. Offen. 3,809,260, Sept. 28, 1989; Appl. Mar. 19, 1988

The title compounds 4-R’0.R2.R3.CsHz.R (I; R = COR4, R’ = alkyl, alkenyl, cycloalkyl, an/l; R*, R3 = F, Cl, Br, alkyl, cycloalkyl; R4 = alkyl,

alkenyl, cycloalkyl, aryl, aralkyl) were prepared by acylation of I (R = H) by R4COX (X = Cl, Br, OCOR4, OH, etc.) in the presence of a zeolite catalyst, e.g., H-mordenite zeolite catalyst.

Contact reduction catalyst for nigtrogen oxide T. Ebina; M. Nitsuta; Y. Kato et al. Babcock-Hitachi K.K. Jpn Kokai Tokkyo Koho 89,245,856, Oct. 2, 1989; Apply. Mar. 29, 1988

The title catalyst is a modernite zeolite with a SiOz/AIz03 ratio of 15-25 loaded with 2 1 of Cu. V, Co, and Fe. The catalyst is resistent to degradation by SO,, particularly S03, and poisoning by As and Se compounds.

Catalytic conversion of aqueous ethanol to ethylene R. Le Van Mao Concordia University U.S. 4,873,392, Oct. 10, 1989; Appl. Apr. 25, 1988

A new process for the selective dehydration to CHz:CHz of a very dilute (2-15%) EtOH derived from a fermentation broth comprises distillation of EtOH/HzO mixture from the broth and contacting it with H-ZSM-5 zeolite catalyst with a Si/AI ratio 5-50, impregnated with 0.5-7% trifluoromethanesulphonic acid.

Preparation of lactones and hydroxycarboxylic acids by oxidation of cyclic ketones C.D. Chang; S.D. Hellring Mobil Oil Corp. U.S. 4.870.192, Sept. 26, 1989; Appl. Aug. 12, 1985

The title compounds were prepared by oxidation of cyclic ketones by HzOz in a liquid phase reaction in the presence of zeolite catalyst, lactone formation being favored by use of a zeolite having an intermediate Constraint Index value, e.g., an HZSM-5 zeolite.

Removal of durene from gasolines and kerosines C. Travers; F. Raatz; C. Marcilly et al. lnstitut FranCais du P&role Eur. Pat. Appl. 350,367, Jan. 10, 1990; FR. Appl. July 4, 1988

Durene is isomerized, disproportionated, or transalkylated in a hydrocarbon mixture, e.g., kerosene of gasoline, by hydrogenation using a catalyst selected from zeolite Y, L, Beta, MFI, or ZSM-20, from offretite or from mordenite.

3-Way exhaust gas treatment catalysts H. Muraki; S. Kondo; S. Matsumoto Toyota Central Research and Development Laboratories Inc.; Toyota Motor Corp. Jpn. Kokai Tokkyo Koho 89,127,044, May 19, 1989; Appl. Nov. 11, 1987

The catalysts have a first oxidation catalyst layer formed on a carrier and a second Cu zeolite layer on top of the first layer. Preferably, the carrier is Alz03, the oxidation catalyst is noble metal (Pt, Pd. and/or Rh) or rare earth (La or CS) oxide, and the zeolite has 50-100% of its cation ions exchanged with Cu ions. These catalysts have high NO, removal by reduction in O-rich as well as lean-combustion exhausts without decreasing the CO and hydrocarbon removing efficiency.

SEPARATION PROCESSES

Separation of alkylbiphenyls M. Morita; H. Takeuchi Nippon Steel Chemical Co. Ltd. Jpn. Kokai Tokkyo Koho 89,249,730, Oct. 5, 1989; Appl. Mar. 30, 1988

Cz-3 dialkylbiphenyls are contacted with faujasite-type zeolites to selectively adsorb dialkylbiphenyls other than 3,5-dialkylbiphenyls. Cl-3 dialkylbiphenyls are contacted with alkali and/or alkaline earth metal-containing faujasite-type zeolites to selectively adsorb 3,3- dialkylbiphenyls. Mixtures of 4,Cdiethybiphenyl and methyl- fluorenes are contacted with faujasite-type zeolites to selectively adsorb methyfluorenes.

196 ZEOLITES, 1997, Vol 11, February