The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 25, 2012
Filed:
Oct. 15, 2008
Mona Ezzelarab, Lund, SE;
Carl Aften, Marietta, GA (US);
Carolina Andersson, Ängelholm, SE;
Cecilia Johansson, Helsinborg, SE;
Richard Lalama, Canton, GA (US);
Geoffrey Monteith, Midland, GA (US);
Lars-inge Olsson, Ekeby, SE;
Ajse Sandqvist, Helsingborg, SE;
Frank Schinkel, Hamburg, DE;
Markus Svensson, Malmö, SE;
Walter Watson, Kennesaw, GA (US);
Caroline Wegner, Bjuv, SE;
Mona Ezzelarab, Lund, SE;
Carl Aften, Marietta, GA (US);
Carolina Andersson, Ängelholm, SE;
Cecilia Johansson, Helsinborg, SE;
Richard Lalama, Canton, GA (US);
Geoffrey Monteith, Midland, GA (US);
Lars-Inge Olsson, Ekeby, SE;
Ajse Sandqvist, Helsingborg, SE;
Frank Schinkel, Hamburg, DE;
Markus Svensson, Malmö, SE;
Walter Watson, Kennesaw, GA (US);
Caroline Wegner, Bjuv, SE;
Kemira Kemi AB, Helsinborg, SE;
Kemira Chemicals, Inc., Kennesaw, GA (US);
Abstract
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.