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:
Feb. 03, 2009
Filed:
Sep. 22, 2005
Jeffrey Edward Boucher, Loveland, OH (US);
Rui Shen, Newcastle Upon Tyne, GB;
Jeffrey Edward Boucher, Loveland, OH (US);
Rui Shen, Newcastle Upon Tyne, GB;
The Procter & Gamble Company, Cincinnati, OH (US);
Abstract
A process for forming a low density detergent granule has the steps of providing from about 0.1% to about 6% of a hydrotrope, providing from about 22% to about 50% crutcher mix moisture, providing from about 0.2% to about 8% of a water-soluble polymer with a molecular weight of at least about 10,000 g/mol, providing from about 2% to about 20% sodium silicate having a SiO:NaO ratio of at least about 2:1, and the balance of adjunct crutcher ingredients, mixing the hydrotrope, crutcher mix moisture, polymer, silicate, and adjunct crutcher ingredients in a crutcher to form a slurry, injecting a gas into the slurry at a pressure of from about 6,000 kPa to about 13,000 kPa, and at a rate of from about 0.01% to about 0.25% and forming the slurry into a detergent granule. The slurry is substantially free of zeolite builder and phosphate builder and the crutcher temperature is maintained at from about 40° C. to about 95° C.