Kemira Chemicals, Inc.

Kemira Kemi Ab

Markus Svensson

Carl Wilhelm Aften

Geoffrey Allen Monteith

Richard Anthony Lalama

Mona Ezzelarab

Frank Schinkel

Walter Philip Watson

Ajse Sandqvist

Cecilia Johansson

Lars-Inge Olsson

Caroline Wegner

Carolina Andersson

The invention provides a process for the production of a granule of a coated oxidizing compound which granule has good delayed release properties, said process comprising a) providing cores of an oxidizing compound produced by fluidized bed spray granulation, b) spraying on the oxidizing compound cores an aqueous solution of metal sili-cate in a fluidized bed, said aqueous solution comprising at least 15% by weight metal silicate, and c) drying to form a metal silicate coating layer on the oxidizing compound core, provided that the amount of metal silicate coating layer is at least 8%, preferably at least 10% by weight based on the total weight of the granule. The invention also provides such granule and well treatment fluids including such granule, and processes for use.

Process for the production of a granule of a coated oxidizing compound such granule and uses of the granule

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Malmö, Sweden

Markus Svensson