Mitsubishi Petrochemical Company Limited

Naohiro Nojiri

Yukio Sakai

Yoshihisa Watanabe

Tomoatsu Iwakura

Makoto Imanari

Nobuhiko Fuga

Kenji Takagi

Toshiyuki Sugihara

Akimi Ayame

Yoshiaki Saotome

Masato Nakajima

A silver-deposited catalyst for the production of ethylene oxide by the oxidation of ethylene, said catalyst comprising

Silver-deposited catalyst for production of ethylene oxide

A silver-deposited catalyst for production of ethylene oxide by oxidizing ethylene, having high selectivity and long life, is provided by this invention. The catalyst is characterized by a combination of (a) catalyst ingredients comprising silver and a cation component selected at least from sodium, potassium, rubidium and cesium, and (b) a carrier composed mainly of alpha-alumina, said carrier having a surface area of 0.6 to 2 m.sup.2 /g, a water absorption of 20 to 50%, a silica content of 0.5 to 12% by weight, a silica content, per m.sup.2 /g of surface area, of 0.5 to 12, preferably 1 to 8, and a sodium content of 0.08 to 2% by weight.

A catalyst for the production of ethylene oxide from ethylene, said catalyst comprising a porous carrier composed of a molded article of a refractory material and at least silver grains deposited on the carrier, wherein

Silver catalyst for production of ethylene oxide from ethylene

A process for producing silver oxalate, which comprises reacting

Process for producing silver oxalate

Silver catalyst for production of ethylene oxide from ethylene and

A packing material for a reactor for producing ethylene oxide by the catalytic oxidation of ethylene in the presence of molecular oxygen, wherein the packing material is used at the inlet side of a catalyst layer of the reactor, is silica-alumina containing 10 to 8 wt. % of silica, and is produced by sintering the silica-alumina at 1200.degree. to 1500.degree. C.

Method for producing ethylene oxide

A catalyst comprises sodium and cesium as a cationic component and chlorine as an anionic component in addition to silver which is a typical conventional catalyst component for the production of ethylene oxide by oxidation of ethylene. Use of the catalyst of the invention gives ethylene oxide at an improved selectivity.

Silver-based catalyst containing chlorine as an anionic component for

A catalyst comprising sodium and cesium as a cationic component and at least one of bromine and fluorine as an anionic component in addition to silver which is a typical conventional catalyst component for the production of ethylene oxide by oxidation of ethylene. Use of the catalyst of the invention gives ethylene oxide at an improved selectivity.

Silver-based catalyst containing bromine and/or fluorine as an anionic

Waste water is subjected to electrolysis in an electrolytic cell having an anode comprising an insoluble central electrode and a body of particulate iron pieces disposed therearound and in electrical contact therewith, whereby impurities in the waste water become occluded within a floc of iron hydroxide formed by electrolytic dissolution of the iron pieces, and the floc containing the impurities is subjected to oxidation processing and is thereafter separated. A magnetic field can be applied to the waste water thus treated thereby to promote sedimentation of the floc.

Electrolytic treatment of waste water

For production of acrolein by gas-phase catalytic oxidation of propylene with molecular oxygen, there is used a catalyst containing molybdenum, bismuth, cobalt, nickel, iron, tin, silicon, and a particular borate in a prescribed proportion. Sodium or manganese is employed for formation of the desired borate. For preparation of the catalyst, the borate of each of the metals is preferably supplied in the combined form of a sodium or manganese salt of various boric acids, such as borax, although it may be supplied separately as a boric acid and a decomposable compound of each metal.

Process for production of acrolein

A process for production of acrylic acid by vapor phase catalytic oxidation of acrolein comprising effecting the catalytic oxidation in the presence of a catalyst comprising

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Tsuchiura, Japan

Naohiro Nojiri