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. 11, 2003
Filed:
Sep. 20, 2001
Applicant:
Inventors:
William Derek Emery, Wirral, GB;
Andreas Theodorus Groot, Vlaardingen, NL;
Assignee:
Unilever Home & Personal Care USA division of Conopco, Inc., Greenwich, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D 1/700 ;
U.S. Cl.
CPC ...
C11D 1/700 ;
Abstract
A process for the production of detergent particles, comprises feeding an acid precursor of an anionic surfactant and a neutralising agent into a horizontal thin-film evaporator/drier comprising a mixing region, a drying region and a cooling region. The resultant detergent particles are graded to separate an oversize granule fraction in which at least 70 wt % of the particles have a minimum diameter of 1000 &mgr;m. This fraction is fed back into the process.