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:
Apr. 28, 1998
Filed:
Jul. 07, 1995
Applicant:
Inventors:
Vishnu Deo Singh, Sugarland, TX (US);
Richard Bruce Strait, Kingwood, TX (US);
Thomas Anthony Czuppon, Houston, TX (US);
Assignee:
The M. W. Kellogg Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
203 42 ; 203 73 ; 203 80 ; 203D / ; 95232 ; 159 243 ; 159 472 ; 159D / ; 202173 ; 202183 ; 2021852 ; 202205 ; 564 73 ;
Abstract
An improved urea recovery process is presented. In the improved process, multiple vacuum rated surface condensers used to condense water vapor evolved during urea vacuum evaporation/concentration are replaced by a direct contact cooler/absorber to obtain substantial capital and utility cost savings. Improved heat exchange efficiency of the present process significantly reduces cooling water usage in comparison to the surface condensers.