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:
Jan. 29, 2013
Filed:
May. 20, 2011
Olusegun M. Falana, San Antonio, TX (US);
Aziz Hikem, San Antonio, TX (US);
Sarkis R. Kakadjian, San Antonio, TX (US);
Frank Zamora, Edo Merida, VE;
Olusegun M. Falana, San Antonio, TX (US);
Aziz Hikem, San Antonio, TX (US);
Sarkis R. Kakadjian, San Antonio, TX (US);
Frank Zamora, Edo Merida, VE;
Clearwater International, LLC, Houston, TX (US);
Abstract
Hydrolyzed nitrilotriacetonitrile compositions are disclosed prepared by a method characterized by a one-shot addition of an amount of nitrilotriacetonitrile to a solution containing an acid catalyst, where the reaction is complete in a time period of less than an hour. The method is also characterized by adjusting the pH of the reaction mixture to a pH of at least 8. The method is also characterized by oxidatively removing free cyanide to a desired low level through the addition of an oxidizing agent the produces environmentally benign by-products to the crude hydrolyzed NTAN to form hydrolyzed NTAN compositions having minimized, negligible, or substantially no free cyanide levels.