Process for elimination of waste material during manufacture of acrylonitrile

US5288473A · kind A · utility

Assignee

• The Standard Oil Company · US

Inventors

• Wilfrid G. Shaw · Lyndhurst, US
• Kenneth L. Bigler · Aurora, US
• Louis R. Trott · Solon, US
• Steve J. Miko · Hudson, US
• Vincent G. Reiling · Wheaton, US
• Michael J. Seely · Naperville, US
• Dev D. Suresh · Macedonia, US
• Maria S. Friedrich · Cleveland, US
• Paul E. Bott · Victoria, US
• Edward J. Sockell · Kalversteeg, US
• Albert R. Shuki, Jr. · Sagamore Hills, US
• Kenneth P. Keckler · Lima, US
• Frank J. Kojancic · Independence, US

Key dates

• Filing date: Oct 9, 1992
• Grant date: Feb 22, 1994
• Expiry date: Oct 9, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C253/26
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

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 an organic compound(s) into said reactor at a location where the compound(s) reacts with substantially all of the excess ammonia without affecting the acrylonitrile yield. Preferably, the organic compound is methanol which is introduced into the reactor at below its coking temperature.