Sumitomo Chemical Company, Limited

Tatsuo Shiraishi

Shinkichi Shimizu

Hiroshi Ichihashi

Yoshihiko Nagaoka

Tadashi Shindo

Susumu Kishiwada

Shigeru Honmaru

Akihiko Atsumi

Sachio Oishi

Hiroshi Fukusen

Tetsu Wakabayashi

Hiroyuki Nishikawa

Shigern Honmaru

Fumiyoshi Kato

A process for production of acrylic acid by the gas phase catalytic oxidation of acrolein with molecular oxygen in the presence of a catalyst, characterized in that the catalyst is a metal oxide catalyst containing as the metal elements Mo, V, Cu and X in a ratio of 12 : 0.1-16 : 0.1-8 : 0.01-12 as the number of atoms (wherein X represents at least one element selected from the group consisting of Fe, Co, Ni and Mg), whereby acrylic acid can be produced at a greatly lowered reaction temperature in a markedly increased yield with an improved perpass yield.

Process for production of acrylic acid

A process for the selective removal of nitrogen oxides from waste gases containing sulfur oxides as well as nitrogen oxides, which comprises contacting the waste gases with a catalyst comprising active metal oxides consisting of vanadium oxide and at least one of molybdenum oxide and tungsten oxide as a catalytically active component and .alpha.-alumina having a specific surface area of 0.3 to 12 m.sup.2 /g and a pore volume of 0.1 cm.sup.3 /g or more as a carrier wherein the atomic ratio of the vanadium, molybdenum, tungsten and aluminum contained in the carrier alumina is

Selective removal of nitrogen oxides from waste gases containing sulfur

A process for selective removal of nitrogen oxides from waste gases containing 1,500 ppm or less (gas volume) of nitrogen oxides by contacting the waste gases with a metal oxide catalyst containing vanadium oxide and at least one of molybdenum oxide and tungsten oxide with an atomic ratio of the oxide forming elements of:

Selective removal of nitrogen oxides from waste gases using V-Mo-W

In the production of acrylonitrile by a vapor phase reaction of propylene, ammonia and oxygen at an elevated temperature, a process which comprises contacting propylene, ammonia and oxygen with a catalyst composition comprising a catalyst system of the formula: Tl.sub.a P.sub.b Mo.sub.c Fe.sub.d Bi.sub.e X.sub.f O.sub.g wherein X represents one or more of the metals, Ni, Mg and Co, and a, b, c, d, e, f and g represent respectively the relative number of atoms of each component; provided that when c is 12, a is 2 or less, but not 0; b is 0 to 5; d is 0.1 to 5; e is 0.1 to 5; f is 2 to 15; and the value of g depends on the number of the other atoms and is usually from 38.3 to 81.5.

Catalytic process for the production of acrylonitrile

A process for the selective removal of nitrogen oxides from waste gases containing nitrogen oxides, which comprises contacting the waste gases with a metal oxide catalyst having the following formula:

Proces for selective removal of nitrogen oxides from waste gases

A method for treating ammonia-containing gases for removing ammonia therefrom, which comprises contacting the ammonia-containing gases with a metal oxide catalyst having the following formula:

Method for treating ammonia-containing gases

A catalytic process for the preparation of acrolein by the vapor phase oxidation of propylene which comprises contacting propylene and oxygen with a catalyst composition comprising a catalyst system of the formula:

Catalytic process for the preparation of acrolein

The process involves stripping ammonium nitrogens and organic materials, as gases, which are present in process waste waters to be discharged from plants wherein gases for use in ammonia synthesis are manufactured by reforming hydrocarbons with steam, decomposing the organic materials selectively in the presence of a catalyst at a temperature of about 120.degree. to 400.degree. C., mixing the remaining gases with the flue gases from said plants so as to provide a gaseous mixture having ammonia therein in an amount of about 0.3 to 10 moles per mole of nitrogen oxides present in the flue gases, reacting the gaseous mixture over a catalyst at a temperature of about 150.degree. to 700.degree. C. and oxidizing the unreacted ammonia, if any, in the presence of a catalyst at a temperature of about 150.degree. to 700.degree. C. to render the nocuous substances innocuous.

Process for concurrently treating process waste waters and flue gases

A process for the preparation of acrolein by the vapor phase catalytic oxidation of propylene which comprises contacting propylene and oxygen with a catalyst composition comprising a catalyst system of the formula:

A catalytic process for the preparation of acrolein by the vapor phase oxidation of propylene which comprises contacting propylene and oxygen with a catalyst composition comprising a catalyst system of the formula: Mo.sub.a Bi.sub.b Fe.sub.c Ni.sub.d Tl.sub.e P.sub.f X.sub.g Y.sub.h O.sub.i wherein X is one or more of Mg, Mn and Co, Y is one or more of Cu, Ca, Sr, Zn, Cd, Sn and Pb and a, b, c, d, e, f, g, h and i represent respectively the number of atoms, provided that, when a is 12, b is 0.1 to 5, c is 0.1 to 12, d is 0.1 to 12, e is 1 or less but not 0, f is 0 to 5, g is 0 to 12, h is 0.1 to 12 and i is from 36 to 112. By such a process, acrolein is produced in a high selectivity and an excellent yield per each pass even at a large space velocity.

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Niihama, Japan

Tatsuo Shiraishi