Chiyoda Corporation

Chiyoda Chemical Engineering Construction Co., Ltd.

Nkk Corporation

Yoshimi Shiroto

Sachio Asaoka

Mitsunori Shimura

Takeo Ono

Hiroaki Taniguchi

Yoshio Fukui

Munekazu Nakamura

Kenji Shimokawa

Takeshi Minami

Noriyuki Yoneda

Yakudo Tachibana

Kazuhiko Tate

Kazuhiko Hamato

Hideki Hashimoto

Shinichi Nakata

Kenichi Kawazuishi

Yasumasa Homma

Mamoru Ando

Takehito Higashi

Masato Tauchi

Kei Yokoyama

Seiya Otani

Osamu Akimoto

Masayoshi Notoya

Yoshiharu Kataoka

Haruto Kobayashi

Masami Ono

Nobuhiro Onda

Tetsuo Maejima

Jun Miki

Ataru Wakabayashi

Hiroto Tajima

Kazuaki Ueda

Nobuhiro Takei

Misunori Shimura

Hirotoshi Koga

Akihiro Fujimori

A process for the production of a liquid hydrocarbon oil from a gas feed containing a lower hydrocarbon and CO , wherein the gas feed is mixed with H O to obtain a mixed gas having specific CO , H O and lower hydrocarbon contents. The mixed gas is contacted with a Rh, Ru/MgO catalyst having a specific surface area of 5 m /g or less to produce a synthesis gas with a carbon conversion efficiency Cf of at least 50%. The thus obtained synthesis gas having a H /CO molar ratio of 1.5-2.5 is reacted in the presence of a Fischer-Tropsch catalyst to obtain a liquid hydrocarbon oil, while the synthesis gas having a H /CO molar ratio of 0.5-1.5 is reacted in the presence of one or more catalysts having methanol synthesizing, dehydrating and CO shift reaction activities to obtain dimethyl ether.

Process of producing liquid hydrocarbon oil or dimethyl ether from lower hydrocarbon gas containing carbon dioxide

Production of high purity vanadium compound from vanadium-containing carbonaceous residues

A process for the production of a carbonic diester, wherein an alcohol is reacted in a reaction zone with carbon monoxide and oxygen in the presence of (a) metallic copper or a copper compound, (b) a heterocyclic compound containing one or more nitrogen atoms in the cyclic skeleton and (c) a glycol ether represented by the following formula (I):

Process of producing carbonic diester

In the production step, alcohol is reacted with carbon monoxide in a reaction solvent in the presence of a rhodium-containing solid catalyst obtained by immobilizing rhodium in an insoluble carrier (I) containing a pyridine ring in its resin structure and an alkyl iodide containing an alkyl group of 1 to 5 carbon atoms, to produce a reaction product having a water content of 0.5 to 10% by weight; and in the subsequent removing step, an organic carboxylic acid is separated and recovered from the reaction product, and the recovered organic carboxylic acid is contacted with an insoluble carrier (II) containing a pyridine ring in its resin structure, to remove an iodide contained in the organic carboxylic acid.

Process for preparing organic carboxylic acid

A methanol carbonylation catalyst includes a rhodium complex supported on a porous, cross-linked vinylpyridine resin, wherein the vinylpyridine resin has a cross-linking degree of 30-60%, a pore volume of 0.1-0.4 ml/g and an average pore diameter of 20-100 nm. The catalyst may be prepared by contacting the pyridine ring-containing resin with an aqueous solution containing rhodium ion and then contacting the resulting rhodium ion-carrying resin with carbon monoxide and an alkyl iodide in an organic solvent to convert the rhodium ion to a rhodium complex bound to the resin. Acetic acid is produced by reacting carbon monoxide with methanol at a temperature of 140.degree.-250.degree. C. and a partial pressure of carbon monoxide of 7-30 kg/cm.sup.2 in the presence of an alkyl iodide and the above catalyst.

Supported rhodium catalyst, method of preparing same and process of

A liquid feed containing methanol, carbon monoxide, an alkyl iodide and a solvent is contacted with a supported rhodium catalyst to produce acetic acid at a temperature of 140.degree.-250.degree. C. and a pressure of 15-60 kg/cm.sup.2 G with a partial pressure of carbon monoxide of 7-30 kg/cm.sup.2 while maintaining (a) the water concentration of the product solution in the range of 0.5-10% by weight and (b) the carbonylation degree C.sub.r, defined in the specification, of the solution within the reactor at 0.15 or more. The solvent may be a carboxylic acid or a carboxylic acid ester.

Process for the production of acetic acid from methanol and carbon

A partition plate for multiple-stage adsorption separator includes a planar body member having opposing external surfaces and a peripheral edge with conduits providing fluid communication between the opposing surfaces and different points on the peripheral edge. Each of the opposing surfaces is provided with a peripheral rim and covered with a perforated plate whereby an open chamber is defined between the body member and a perforated plate at each of the external faces.

Partition plate for multiple-stage adsorption separator

An adsorbent is charged into a horizontal type packed column having a multiplicity of packed vessels each of which is composed of a partition plate and a cylindrical body and which are connected through the partition plates, from an opening formed on the upper wall of each cylindrical body. Then, each opening is closed tightly with a detachable plug cover. The partition plate is provided with a first fluid passage through which a fluid is passed in the direction of the axis of the cylindrical body and a second fluid passage which is in communication with the first fluid passage, which extends toward the peripheral wall of the cylindrical body and which opens at the cylindrical body. This apparatus is suitable for use as a multiple-stage adsorption separator directed to a simulated moving-bed system.

Separator

A selector valve used for distributing and combining process flow. This valve comprises an open-ended cylindrical casing, a valve seat secured to the casing, an inlet hole extending coaxially with the casing through the valve seat, a plurality of outlet holes extending through the valve seat and arranged in a circle concentrical with the casing, a valve body fitted in the casing and rotatable about its axis, a U-shaped passage formed in the valve body such that its one end opens at a position coinciding with the inlet hole and its other end opens at a position meeting the circle, a spring provided within the casing for urging the valve body toward the valve seat so that the valve body is maintained in pressure contact with the valve seat, a driving mechanism for rotating the valve body through a desired angle so that the inlet hole can be in fluid communication with selected one of the outlet holes through the U-shaped passage, an annular groove formed on the surface of the valve body to define an annular, close space between the valve seat and the valve body at a position inside of the circle and a discharge hole extending through the valve seat at such a position as to be in fluid communication with the space.

Selector valve

A process for the preparation of naphthalene mono or polycarboxylic acids, such as 2,6-naphthalene dicarboxylic acid, is disclosed which includes oxidizing a naphthalene compound such as 2,6-diisopropylnaphthalene in a specific solvent with molecular oxygen in the presence of a catalyst containing a heavy metal compound and a bromine compound. The solvent is an aliphatic monocarboxylic acid and may further contain benzene and/or water. By controlling the ratio of the amount of catalyst metal to the feed rate of the raw material naphthalene compound, the yield of desired product can be controlled.

Process for the preparation of naphthalene carboxylic acids

A method of separating 2,6-diisopropylnaphthalene from a mixture containing 2,6-diisopropylnaphthalene and structural isomers thereof including the 2,7-isomer is disclosed, wherein the mixture is first subjected to a selective adsorption and desorption treatment using a zeolite absorbent capable of adsorbing the 2,7-isomer to obtain a first extract containing the sorbed 2,7-isomer and a first raffinate containing non-sorbed isomers including the 2,6-isomer, the 2,6-isomer being thereafter separated from the first raffinate.

Method of separating 2,6-diisopropylnaphthalene from a mixture

A process for the production of 2,6-diisopropylnaphthalene is disclosed wherein an isopropylation reaction mixture containing isopropylated naphthalenes is subjected to transalkylation with a triisopropylnaphthalene-containing mixture to obtain a mixture containing mono-, di- and tri-isopropylnaphthalenes which is then separated into a first fraction containing monisopropylnaphthalenes, a second fraction containing diisopropylnaphthalenes and a third fraction containing triisopropylnaphthalenes. The first and third fractions are recycled to the above system, while the second fraction is subjected to separation treatments for the recovery of 2,6-diisopropylnaphthalene. The second fraction from which 2,6-diisopropylnaphthalene has been removed is subjected to transalkylation with naphthalene to obtain a monoisopropylnaphthalene-rich mixture which is to be fed to the isopropylation step.

Process for the production of 2,6-diisopropylnaphthalene

Heavy hydrocarbon oils are converted into light hydrocarbon oils by two-stage process wherein, in the first stage, a heavy hydrocarbon oil is subjected to thermal cracking conditions and, in the second stage, the product of the thermal cracking is subjected to a hydrotreatment in the presence of a specific catalyst including, as a carrier, a clay mineral consisting mainly of magnesium silicate having a double-chain structure such as sepiolite.

Method of converting heavy hydrocarbon oils into light hydrocarbon oils

Heavy hydrocarbon oils are converted into light hydrocarbon oils by two-stage process wherein, in the first stage, a heavy hydrocarbon oil is subjected to thermal cracking conditions and, in the second stage, the product of the thermal cracking is subjected to a hydrotreatment in the presence of a specific catalyst having a large pore volume in pores with diameters of 200-400 .ANG.. The hydrotreatment is carried out so that the product oil may have a toluene insoluble content of 0.5 wt % or less.

Process for the conversion of heavy hydrocarbon oils into light

Growing community of inventors

Yokohama, Japan

Yoshimi Shiroto