Mitsui Petrochemical Industries, Ltd.

Honshu Chemical Industry Co., Ltd.

Honshu Chemical Ind. Co. Ltd.

Osaka Municipal Government

Mitsui Petrochemical Ind. Ltd.

Fujihisa Matsunaga

Hiroshi Fukuhara

Mitsuki Yasuhara

Hirohiko Nambu

Hiroaki Nakagawa

Shintaro Araki

Yasushi Nakashima

Mitsunori Nakamura

Shinichi Nishiyama

Sanehiro Yamamoto

Hideo Yamaoka

Satoshi Inoki

Yoichiro Isota

Yuuichirou Tatsuki

Shoichi Miyakoshi

Ikuzo Nishiguchi

Yoshio Ishino

Tadahiko Nishimura

Toshiyuki Isaka

Toyoji Shimizu

Ichiro Imai

Takayuki Nakamura

Shunji Yago

Masayasu Isibasi

Norio Ohno

Yoshiharu Ayabe

Kenzo Tsujimoto

Yoshiyuki Shinohara

Tohru Taguchi

Seiichi Tanaka

Toru Yamanaka

Isamu Okubo

Etsuo Miyake

Kiyotaka Banba

Toshihiro Tachi

Tsuyoshi Kimura

Yasunori Shibuta

Eiji Kato

Keiji Arimatsu

Takashi Kakiuchi

Masato Okano

There is disclosed a catalyst for ortho-alkylation of phenols obtained by calcination of a catalyst precursor comprising a dry mixture of:

Catalyst for ortho-alkylation of phenols, a precursor thereof, and

A method of producing styrene derivatives expressed the general formula (2) by reacting a benzaldehyde derivative expressed by the general formula (1) with dibromomethane under the existence of zinc metal as well as an active chloride for producing various types of oxystyrene which are polymerized monomers as a photoresist material used in a high density integrated circuit process from easily available materials which also can easily be handled: ##STR1## (wherein R indicates a an alkyl group, alkoxyalkyl group, an alkylcarbonyl group, an alkoxycarbonyl group, a 5 or 6-atom heterocylclic groups, or an alkylsilyl group); ##STR2## (wherein R indicates any of the same substituents as those described above.)

Method of producing styrene derivatives

The process for preparing anilines by reaction of phenols with an amination agent in accordance with the present invention is disclosed, which process is characterized by carrying out the reaction of phenols with an amination agent in the presence of a low alkali and weakly acidic alumina catalyst having the alkali oxide content of less than 0.5% by weight, said alumina catalyst being obtained by firing an alumina catalyst containing in a dry state more than 80% by weight of alumina and less than 20% by weight of silica at a temperature of 600.degree.-900.degree. C., followed by acid treatment. According to the present invention, there are obtained such excellent effects that even when the reaction is carried out at a temperature lower than those employed in the case of conventionally well-known catalysts, the desired anilines can be prepared in high yields and high selectivity and, moreover, a high catalyst activity can be maintained over a long period of time. The alumina catalyst used in the present invention is characterized by having the alkali metal oxide content of less than 0.5% by weight and pKa of from -3.0 to +6.8 as measured by Hammett's indicator, and containing in a dry state more than 80% by weight of alumina and less than 20% by weight of silica, and this catalyst is prepared by firing an alumina catalyst containing in a dry state more than 80% by weight of alumina and less than 20% by weight of silica at a temperature of 600.degree.-900.degree. C., followed by acid treatment.

Process for preparing anilines, catalysts used therefor and process for

Propylene can be prepared in high yield and selectivity by dehydrating isopropanol in the presence of a .gamma.-alumina catalyst having a mean pore diameter of from 30 to 150 .ANG. with a standard deviation (.sigma..sub.n) of from 10 to 40 .ANG. based on statistic calculation from pore diameter and pore volume.

Preparation of propylene by dehydration of isopropanol in the presence

A process for producing a phenol from the steps of:

Process for producing phenols

This invention relates to carboxylic acid ester compounds or liquid crystal compounds represented by the following formula [A], liquid crystal compositions and liquid crystal elements using these compounds, the method of producing said liquid crystal elements, and other uses. ##STR1## wherein R represents one radical selected from the group consisting of an alkyl group having 6-18 carbon atoms, an alkoxy group having 6-18 carbon atoms, and a halogenated alkyl group having 6-18 carbon atoms, X represents --CF.sub.3 or --CH.sub.2 --CH.sub.3, m is an integral number of 1-10 when X is --CF.sub.3, and an integral number of 2-10 when X is --CH.sub.2 --CH.sub.3, and C* represents an asymmetric carbon atom.

Carboxylic acid ester compounds, and their related matters and method of

Isopropanol is prepared through catalytic hydrogenation of acetone by feeding hydrogen gas and acetone liquid into a reactor having a fixed catalyst bed from its top to form a cocurrent gas/liquid downflow while maintaining the catalyst bed in a trickle bed state. This process can produce isopropanol at a high reaction rate in high yields using a simple reactor.

Preparation of isopropanol

A process for producing 4,4'-diphenylmethane dicarbamates through one-stage condensation by reacting N-phenyl carbamates with a methylenating agent in presence of a zinc halide, as a catalyst. 4,4'-diphenylmethane dicarbamates can be produced with high selectivity and in high yield.

Method of condensing N-phenyl carbamates

Phenol is produced in a recycle manner by (a) reacting benzene with propylene to synthesize cumene, (b) oxidizing the cumene of step (a) into cumene hydroperoxide, (c) acid cleaving cumene hydroperoxide into phenol and acetone, (d) hydrogenating the acetone of step (c) into isopropanol, (e) dehydrating the isopropanol of step (d) into propylene, and (f) recycling the propylene of step (e) to step (a). It is also possible to take propylene from step (e). The acetone by-product produced upon preparation of phenol is converted into propylene which is useful by itself for any other uses or recycled to the phenol producing process.

Phenol preparation process and propylene recovery therefrom

In a first form, a process is provided for preparing phenol by converting acetone by-produced by the cumene process into isopropanol, and alkylating benzene with the isopropanol and optional propylene, thereby forming phenol without acetone by-product. And cumene is prepared by alkylating benzene in the presence of a zeolite catalyst using isopropanol or a mixture of isopropanol and propylene as an alkylating agent. Further provided is the continuous alkylation of benzene with isopropanol wherein a reaction mixture is divided into first and second portions, with the first portion being recycled to the reactor and the second portion being taken out as a reaction product.

Preparation of cumene through alkylation of an aromatic compound and

An aniline is prepared by reacting a phenol with an amination agent in the presence of a specific porous .gamma.-alumina catalyst.

Preparation of anilines

Phenol is produced by dehydrogenating cyclohexenone through a vapor-phase reaction in the presence hydrogen using a solid-phase catalyst having platinum and alkali metal carried on a support.

Method of dehydrogenating cyclohexenone

A phenol and/or a cyclohexanone is prepared by dehydrogenation of cyclohexenone and/or a cyclohexenol in liquid phase under the presence of a solid catalyst comprising a platinum-group metal loaded on a carrier. The solid catalyst comprises a carrier selected from activated carbon and hydrotalcites.

Process for producing a phenol and/or a cyclohexanone

A hydrogenation catalyst which is prepared by adsorbing ruthenium ions on a hydrotalcite (i.e. an anionic clay mineral) and/or a compound capable of conversion to a hydrotalcite structure by hydration, and then reducing said adsorbed ruthenium ions. The catalyst suitable for use in a process by which a monocyclic aromatic hydrocarbon is partially reduced to produce cyclohexene.

Hydrogenation catalyst

Process for preparing 2-unsubstituted imidazoles

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Ichihara, Japan

Fujihisa Matsunaga