Join
today

Boliven PRO is more than just patent search

  • Build and save lists using the powerful Lists feature
  • Analyze and download your search results
  • Share patent search results with your clients

Patents »

US4732888: Durable zinc ferrite sorbent pellets for hot coal gas desulfurization

Share

Filing Information

Inventor(s) Mahesh C. Jha · Antonio E. Blandon · Malcolm T. Hepworth ·
Assignee(s) AMAX Inc. ·
Attorney/Agent(s) Michael A. Ciomek ·
Primary Examiner Sneed; Helen M. S. ·
Assistant Examiner Anthony McFarlane ·
Application Number US6863287
Filing date 05/15/1986
Issue date 03/22/1988
Predicted expiration date 05/15/2006
U.S. Classifications 502/406  · 502/400  ·
International Classifications B01J 2002  ·
Kind CodeA
International Classifications 502400;406;411;412;517;415;307;329;338;342;343;344;321;324;524;414 ·
9 Claims, No Drawings


Abstract

Durable, porous sulfur sorbents useful in removing hydrogen sulfide from hot coal gas are prepared by water pelletizing a mixture of fine zinc oxide and fine iron oxide with inorganic and organic binders and small amounts of activators such as sodium carbonate and molybdenite; the pellets are dried and then indurated at a high temperature, e.g., 1800.degree. C., for a time sufficient to produce crush-resistant pellets.

Independent Claims | See all claims (9)

  1. 1. A durable, pelletized and indurated sorbent for removing hydrogen sulfide from hot coal gas which consists essentially of zinc ferrite, has a surface area of about 0.5 to about 5 m..sup.2 /gram, and is prepared by mixing fine iron oxide and fine zinc oxide, each having a particle size of less than about 1 micron in substantially equi-molar amounts with an inorganic binder in an amount greater than zero and up to about 15%, by weight, and an organic binder in an amount greater than zero and up to about 5%, by weight, up to about 5%, by weight, of manganese oxide, up to about 0.2%, by weight, of an alkali metal carbonate and up to about 0.2%, by weight, of molybdenite, said inorganic binder being capable of a strong bridging action between zinc ferrite particles during induration and said organic binder being capable of burning away during induration to form a porous structure, pelletizing the resulting mixture with water, drying the resulting pellets and indurating the dried pellets and a temperature of about 1600.degree. F. to about 2000.degree. F. to form strong, porous sorbent pellets having a crush strength of about 5 to about 20 lbs. Dead Weight Load.
  2. 4. The process for producing a durable sorbent for removing hydrogen sulfide from hot coal gas which comprises mixing fine iron oxide and fine zinc oxide, each having an average particle diameter of less than 1 micron in substantially equi-molar amounts with an inorganic binder in an amount greater than zero and up to about 15% by weight, an organic binder in an amount greater than zero and up to about 5% by weight and small amounts of up to about 0.5% by weight of a compound from the group consisting of an alkali metal basic compound and a molybdenite catalyst as activators, pelletizing the resulting mixture with water and indurating the resulting pellets at a temperature of about 1600.degree. to about 2000.degree. F. to produce durable pellets having a surface area of about 0.5 to about 5 m..sup.2 /gram and crush strength of 5 to 20 lbs. Dead Weight Load.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US2292632 GREGER HERBERT H Greger Aug 1942
US3441370 CATALYSTS & CHEM INC Gutmann et al. Apr 1969
US3492083 GRILLO WERKE AG Lowicki et al. Jan 1970
US3579293 US INTERIOR Shultz et al. May 1971
US3684447 PHILLIPS PETROLEUM CO Johnston et al. Aug 1972
US3778374 SHICHIJO Y Schichijo et al. Dec 1973
US3832455 SMITH G LABOR Smith et al. Aug 1974
US4083884 Petro-Tex Chemical Corporation Purdy Apr 1978
US4088736 Institut Francais du Petrole Courty et al. May 1978
US4171285 Chevron Research Company Mulaskey Oct 1979
US4299802 Union Carbide Corporation Tellis Nov 1981
US4311680 The Goodyear Tire & Rubber Company Frech et al. Jan 1982
US4323544 Noxso Corporation Magder Apr 1982
US4366131 Irwin Fox Fox Dec 1982
US4443264 Bayer Aktiengesellschaft Hund et al. Apr 1984
US4472369 Japan Metals and Chemicals Co., Ltd. Kambe et al. Sep 1984
US4533529 Standard Oil Company Lee Aug 1985

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
EP0159056SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.Oct 1985

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US6664210 M-I LLC Delbert C. Scranton, Jr. et al. Dec 2003
US6346190 Phillips Petroleum Company Gyanesh P. Khare Feb 2002
US7563424 M-I, LLC Delbert C. Scranton, Jr. et al. Jul 2009
US6809063 The Sulfa Treat Company Delbert C. Scranton Jr. et al. Oct 2004
US6350422 Phillips Petroleum Company Gyanesh P. Khare et al. Feb 2002
US7198661 TUPPER LORNE ALVIN Lorne Alvin Tupper Apr 2007
EP1331991 M-I L.L.C. Thomas G. BRAGA et al. Aug 2003
EP0851787 Parsons Process Group Inc. ALKHAZOV, Tofik, G., O. et al. Aug 2002
US5244641 Phillips Petroleum Company Gyanesh P. Khare Sep 1993
US5603913 Azerbaidzhanskaya Gosudarstvennaya Neftianaya Academiya Alkhazov; Tofik G. O. et al. Feb 1997
US5958830 Phillips Petroleum Company Gyanesh P. Khare et al. Sep 1999
US5494880 The United States of America as represented by the United States Department of Energy Ranjani V. Siriwardane Feb 1996
US6228802 The SulfaTreat Company Delbert C. Scranton, Jr. et al. May 2001
US5714431 Research Triangle Institute Raghubir P. Gupta et al. Feb 1998
US5866503 The United States of America as represented by the United States Department of Energy Ranjani V. Siriwardane Feb 1999
US5348921 The United States of America as represented by the United States Department of Energy Larry A. Bissett et al. Sep 1994
US5891415 Azerbaidzhanskaya Gosudarstvennaya Neftianaya Academiya Alkhazov; Tofik G. O. et al. Apr 1999
US5306685 Phillips Petroleum Company Gyanesh P. Khare Apr 1994
US5703003 United States Department of Energy Ranjani V. Siriwardane Dec 1997
US6306793 Research Triangle Institute Brian S. Turk et al. Oct 2001
US5534234 Lorin D. Reddin et al. Jul 1996
US5447702 The M. W. Kellogg Company William M. Campbell et al. Sep 1995

Patent Family

The current document is not in a family.