Process for producing abrasion-resistant sodium perborate monohy

Details Process for producing abrasion-resistant sodium perborate monohy Process for producing abrasion-resistant sodium perborate monohy

1996-05-08

1997-08-05

Langel, Wayne

Chemistry of inorganic compounds

Boron or compound thereof

Oxygen containing

423279, C01B 1512

Patent

active

056539509

ABSTRACT:
Sodium perborate monohydrate having an O.sub.a content of 14 to 16%, a bulk density of at least 600 g/l, an abrasion index (ISO 5937) of less than 8%, and a specific surface of less than 5 m.sup.2 /g can be produced by a fluidized bed--spraying process by spraying a sodium perborate solution produced by combining and mixing an aqueous hydrogen peroxide solution with an aqueous sodium metaborate solution, whereby the contact time between the combination of the solutions and the spraying is at least 2 seconds and preferably at least 5 seconds.

REFERENCES:
patent: 4115519 (1978-09-01), Brichard et al.
patent: 4185960 (1980-01-01), Brichard et al.
patent: 4215097 (1980-07-01), Brichard et al.
patent: 5094827 (1992-03-01), Bertsch-Frank et al.
patent: 5229092 (1993-07-01), Dugua
patent: 5395602 (1995-03-01), Herzig et al.
International Standard Publication, ISO 5937-1980(E), First Edition --Nov. 1, 1980, entitled, "Sodium perborates for industrial use --Determination of degree of attrition," by the International Organization For Standardization.
International Standard Publication, ISO 3424-1975(E), First Edition -Nov. 1, 1975, entitled, "Sodium perborates for industrial use -Determination of bulk density," by the International Organization For Standardization.
Journal of Crystal Growth, Sep. 1989, published in the Netherlands, The Growth and Dissolution of Sodium Perborate Crystals in a Fluidized Bed Crystallizer, pp. 375-386.

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