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:
Nov. 01, 1977
Filed:
Aug. 03, 1973
Hans H Peters, Federal Way, WA (US);
Resources Conservation Co., Renton, WA (US);
Abstract
A sludge, or other material containing solid matter and bound and unbound water, is dewatered by admixing the sludge with an amine having an inverse critical solution point with water, always maintaining the temperature of the resulting slurry below the inverse critical solution temperature, and thereafter separating the solid matter from the resulting single phase liquid.The single phase liquid is then heated to a temperature above the inverse critical solution point to form an amine phase and a water phase, after which the water phase is separated from the amine phase. The liquid-solid separation rate is significantly increased by preventing the slurry temperature from rising above the inverse critical solution temperature during mixing and separation.