Stephen J Allen

US Patent:

8097557, Jan 17, 2012

Filed:

Aug 8, 2006

Appl. No.:

11/500833

Inventors:

Vijay S. Bhise - Caldwell NJ, US
Arie Bortinger - Ridgewood NJ, US
Stephen R. Allen - Morris Plains NJ, US

Assignee:

SD Lizenverwertungsgesellschaft mbH & Co. KG - Munich

International Classification:

B01J 23/00
B01J 21/00
B01J 20/00

US Classification:

502347, 502243, 502348, 502355, 502415, 502439

Abstract:

The invention relates to an improved process for producing a catalyst useful for the epoxidation of ethylene to ethylene oxide. In forming the catalyst, a silver-impregnated support is subjected to two calcinations. The support is subjected to a first calcination in a first atmosphere comprising air. Next the support is subjected to a second calcination in a second atmosphere which is substantially entirely comprised of inert gas, and which second atmosphere is substantially absent of hydrogen. This two-stage calcination produces an improved catalyst which contains fewer organics left over under standard conditions of air calcination alone, while costing less than calcination in an inert gas alone.

US Patent:

8378129, Feb 19, 2013

Filed:

Oct 25, 2011

Appl. No.:

13/280962

Inventors:

Vijay S. Bhise - North Caldwell NJ, US
Arie Bortinger - Ridgewood NJ, US
Stephen R. Allen - Morris Plains NJ, US

Assignee:

SD Lizenzverwertungsgesellschaft mbH & Co. KG - Munich

International Classification:

C07D 301/03
C07D 301/10
B01J 21/00
B01J 21/04
B01J 20/00
B01J 23/00
B01J 23/02
B01J 23/48
B01J 23/50

US Classification:

549523, 549534, 549535, 549536, 549537, 502243, 502347, 502348, 502355, 502415, 502439

Abstract:

The invention relates to an improved process for producing a catalyst useful for the epoxidation of ethylene to ethylene oxide. In forming the catalyst, a silver-impregnated support is subjected to two calcinations. The support is subjected to a first calcination in a first atmosphere comprising air. Next the support is subjected to a second calcination in a second atmosphere which is substantially entirely comprised of inert gas, and which second atmosphere is substantially absent of hydrogen. This two-stage calcination produces an improved catalyst which contains fewer organics left over under standard conditions of air calcination alone, while costing less than calcination in an inert gas alone.