Process for elimination of waste material during manufacture of

Details Process for elimination of waste material during manufacture of Process for elimination of waste material during manufacture of

1993-08-11

1995-10-10

Brust, Joseph Paul

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitriles

423237, 558320, C07C25332, C07C25334

Patent

active

054572231

ABSTRACT:
A process for the substantial or complete elimination of ammonium sulfate generated during the production of acrylonitrile by the direct ammoxidation of propylene/propane, ammonia and an oxygen containing gas (e.g. air) over a fluid bed catalyst wherein the improvement comprises introducing methanol into said reactor in the upper portion of the reactor at a location where the methanol reacts with at least a portion if not substantially all of the excess ammonia without affecting the acrylonitrile yield. Preferably, methanol is introduced into the reactor at below its coking temperature. In particular, when an oxygen lean fluid bed catalyst is utilized, an additional oxygen containing gas is introduced into the reaction at a distance between about 8 to 14 inches from the methanol feed location.

REFERENCES:
patent: 3911089 (1975-10-01), Shiraishi et al.
patent: 5288473 (1994-02-01), Shaw et al.
Patent Application No. 1978-35,232 (Japan), Oct. 2, 1979.
Patent Application No. 1974-87,474 (Japan),-5-1-016615, Apr. 17, 1979.
Derwent World Patent Index JP 51-16615. (Date not available).

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