James C Joseph

US Patent:

56931840, Dec 2, 1997

Filed:

Sep 4, 1996

Appl. No.:

8/708865

Inventors:

Thomas P. Gandek - Trenton NJ
James C. Joseph - Yardley PA
Michael A. Pikulin - Bound Brook NJ
George Pangalos - Plainsboro NJ
Philip E. Bowden - Franklin VA

Assignee:

Union Camp Patent Holding, Inc. - Wilmington DE

International Classification:

D21C 9153

US Classification:

162 48

Abstract:

A method for reducing or eliminating the formation of salt scale upon process equipment caused by precipitation of insoluble salts during the bleaching of pulp. The pulp is subjected to a bleaching sequence which includes a plurality of pulp treatment steps, wherein at least one pulp treatment step is conducted under alkaline conditions and at least one pulp treatment step is conducted under acidic conditions. A filtrate stream which contains dissolved insoluble salts therein is thus generated, and at least a portion of the filtrate stream is combined with an alkaline stream and pulp to cause the salts to associate with the pulp, thus removing the salts from the filtrate stream to reduce or eliminate the formation of salt scale upon process equipment during the bleaching of the pulp.

US Patent:

61267813, Oct 3, 2000

Filed:

Aug 1, 1991

Appl. No.:

7/739050

Inventors:

James Joseph - Yardley PA
Michael A. Pikulin - Bound Brook NJ
William H. Friend - Savannah GA

Assignee:

Union Camp Patent Holding, Inc. - Wilmington DE

International Classification:

D21C 1106
D21C 9153

US Classification:

162 29

Abstract:

A process for conditioning an ozone gas recycle stream in an ozone pulp bleaching process, wherein the level of carbon dioxide in the recycle stream is controlled to allow full capacity operation of the ozone generator. Carbon dioxide concentration is identified over the relevant operational ranges and maximum concentration is identified for full capacity/optimum efficiency operation. Specific methods are described for controlling carbon dioxide concentration including purging a portion of the recycle stream, counter-current scrubbing of the recycle stream with an alkaline solution and passing the recycle stream through an adsorbent material. Contaminants entering the system also may be reduced by directing the purged recycle stream, which is relatively oxygen rich, into the dewatering press where pulp consistency is increased. In this manner nitrogen surrounding the pulp is displaced by oxygen and thus, does not enter the bleaching/ozone system with the pulp.

US Patent:

63158612, Nov 13, 2001

Filed:

Aug 31, 2000

Appl. No.:

9/653355

Inventors:

James Joseph - Yardley PA
Michael A. Pikulin - Bound Brook NJ
William H. Friend - Savannah GA

Assignee:

Union Camp Patent Holding, Inc. - Wilmington DE

International Classification:

D21C 9153
D21C 1106

US Classification:

162 15

Abstract:

A method for conditioning an ozone gas recycle stream in an ozone pulp bleaching process. The method includes the steps of providing an oxygen containing feed gas to an ozone generator; generating ozone from said feed gas to produce an ozone rich oxygen gas; bleaching pulp with said ozone rich gas, thereby producing an exhaust gas containing contaminants including carbon dioxide and entrained pulp fibers; removing at least some of said contaminants by at least removing entrained pulp fibers from the exhaust gas to produce a recycle gas; directing said recycle gas into the ozone generator to provide at least a portion of said oxygen containing feed gas; and removing carbon dioxide during said contaminant removal step in an amount sufficient to a level of about 6 wt. wt. % to thus allow operation of the ozone generator at or approaching full capacity.

US Patent:

55542590, Sep 10, 1996

Filed:

Oct 1, 1993

Appl. No.:

8/130619

Inventors:

Thomas P. Gandek - Trenton NJ
James C. Joseph - Yardley PA
Michael A. Pikulin - Bound Brook NJ
George Pangalos - Plainsboro NJ
Philip E. Bowden - Franklin VA

Assignee:

Union Camp Patent Holdings, Inc. - Wayne NJ

International Classification:

D21C 908
D21C 9153

US Classification:

162 48

Abstract:

A method for reducing or eliminating the formation of salt scale upon process equipment caused by precipitation of salts during the bleaching of pulp. The pulp is subjected to a bleaching sequence which includes a plurality of pulp treatment steps, wherein at least one pulp treatment step is conducted under alkaline conditions and at least one pulp treatment step is conducted under acidic conditions. A filtrate stream which contains dissolved salts therein is thus generated, and at least a portion of the filtrate stream is combined with an alkaline stream and pulp to cause the salts to associate with the pulp, thus removing the salts from the filtrate stream to reduce or eliminate the formation of salt scale upon process equipment during the bleaching of the pulp.