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:
May. 15, 2018
Filed:
Jun. 17, 2014
Houghton Technical Corp., Wilmington, DE (US);
Alan Edward Cross, Yardley, PA (US);
John Michael Burke, Kirtland, OH (US);
Houghton Technical Corp., Wilmington, DE (US);
Abstract
A process for recycling aqueous quenching fluids, said process comprising: (a)(1) providing a metal quenching bath tank comprising a used metal aqueous quenching fluid containing contamination with a water insoluble, fire resistant hydraulic fluid; or (a)(2) collecting, in a collection tank in association with a quench barrel or quench ring, used metal aqueous quenching fluid after the fluid has been sprayed onto heated metal, wherein the collected used fluid is contaminated with a water insoluble, fire resistant hydraulic fluid; (b) heating the bath tank (a)(1) or collection tank (a)(2) to a temperature of about 105 to 200 ° F. with agitation for less than 12 hours; (c) recovering a resulting uncontaminated aqueous quenching phase from a lower portion of the bath tank (a)(1) or collection tank (a)(2); and (d) returning the recovered aqueous quenching phase to a functional quenching bath tank or functional quenching spray tank.