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Process for the manufacture of spherical alumina-containing particles

  • US 4,013,587 A
  • Filed: 02/03/1976
  • Issued: 03/22/1977
  • Est. Priority Date: 02/04/1975
  • Status: Expired due to Term
First Claim
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1. A process for the preparation of alumina-containing particles, comprising the steps of:

  • a. mixing an aluminum oxide hydrosol containing a hydrate of alumina or activated alumina and an additive component of wood flour, starch, carbon black or carbon powder with a solution of a hydrolyzable base to form a mixture;

    b. introducing said mixture in dispersed form into a water-immiscible liquid having a temperature of from about 60°

    to 100°

    C., whereby gel particles are formed;

    c. aging said gel particles in said liquid at said temperature and subsequently in an aqueous ammonia solution;

    d. recovering said aged particles; and

    e. drying and calcining said recovered particles.

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