Allen H Nelson

US Patent:

49418955, Jul 17, 1990

Filed:

Aug 23, 1989

Appl. No.:

7/397392

Inventors:

Stephen C. Ceisel - Shorewood IL
James F. Conrad - Shorewood IL
Elizabeth M. Lestan - Joliet IL
Allen P. Nelson - Munster IN

Assignee:

Amoco Corporation - Chicago IL

International Classification:

C07D30760

US Classification:

55 84

Abstract:

A process is disclosed for increasing the recovery of maleic anhydride from the product condenser. Maleic anhydride is added to the oxidation reactor gaseous effluent. Maleic acid buildup in the condenser is reduced; condenser plugging is reduced; and process run time required to build up to production rates after periodic cleaning can be reduced.

US Patent:

20150183710, Jul 2, 2015

Filed:

Dec 30, 2014

Appl. No.:

14/585663

Inventors:

- Naperville IL, US
Thomas M. Bartos - Naperville IL, US
Allen Nelson - Houston TX, US

Assignee:

BP Corporation North America Inc. - Naperville IL

International Classification:

C07C 51/42
C07C 51/265

Abstract:

Processes for manufacturing purified aromatic carboxylic acids include: generating high-pressure steam from boiler feed water supplied to a boiler; heating a crude aromatic carboxylic acid using the high-pressure steam, whereby the high pressure steam is condensed to form a high-pressure condensate; and purifying the crude aromatic carboxylic acid to form a purified aromatic carboxylic acid. The boiler feed water includes at least a portion of the high-pressure condensate and makeup boiler feed water from at least one additional source.