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Process for the manufacture of catalytic elements and catalytic elements so produced

  • US 4,895,821 A
  • Filed: 08/12/1988
  • Issued: 01/23/1990
  • Est. Priority Date: 08/14/1987
  • Status: Expired due to Fees
First Claim
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1. A process for the manufacture of catalytic elements, said process comprising the steps of:

  • (a) providing a primary catalytic material, said primary catalytic material being a member selected from the group consisting essentially of iron oxide, a mixture of iron oxide and chromium oxide, a mixture of iron oxide and manganese oxide, and a mixture of iron oxide, chromium oxide and manganese oxide and combinations of members of the group;

    (b) mixing a binder means with said primary catalytic material for binding said primary catalytic material;

    (c) molding said mixed primary catalytic material and binder means produced in said step (b) to produce green catalytic elements;

    (d) subjecting said green catalytic elements to a first temperature treatment of 100°

    C. to 250°

    C. to set said binder means;

    (e) treating said catalytic elements obtained from said step (d) with a mixture of sulfuric acid and phosphoric acid; and

    (f) subjecting said catalytic elements obtained from said step (e) to a second temperature treatment in the range between about 100°

    C. and about 600°

    C. to temper said catalytic elements.

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