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:
Aug. 19, 1997
Filed:
Mar. 24, 1995
Applicant:
Inventors:
Peter E Reed, Plainfield, IL (US);
Martha R Finck, Aix-En Provence, FR;
Assignee:
Nalco Chemical Company, Naperville, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C02F / ;
U.S. Cl.
CPC ...
528129 ; 528162 ; 528212 ; 528219 ; 528230 ; 528232 ; 210723 ; 210728 ; 210730 ; 210736 ;
Abstract
The invention is a process for preparing alkylated tannin Mannich polymers by reacting a tannin Mannich condensation polymer, prepared from a condensed tannin, and amine, and formaldehyde, with an alkylating agent at a pH between 5 and 14. Optionally, the alkylated tannin Mannich polymer may be reacted further with formaldehyde to increase its viscosity. The invention further comprises a method of removing color form waste water utilizing the alkylated tannin Mannich polymer produced by the above process.