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. 07, 1985
Filed:
Aug. 20, 1982
Chong-Kuang Shaw, Broadview Heights, OH (US);
The B. F. Goodrich Company, Akron, OH (US);
Abstract
Crude MBT is purified and substantially decolorized by treating same with an alkaline solution to form an MBT salt solution, measuring pH of the salt solution when adding the alkaline solution until an abrupt rise in pH is observed and stopping addition of the alkaline solution in response thereto, treating the salt solution with a solvent to extract solvent-soluble impurities, oxidizing the salt solution by introducing oxygen into an enclosed vessel containing the salt solution and vigorously agitating the solution until oxygen uptake essentially stops, diluting the salt solution with water, filtering the salt solution to remove precipitated impurities, and concentrating the solution.