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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.:

US 7435847 B1

PDFFull Text
Date of Patent:
Oct. 14, 2008

Filed:

Sep. 04, 2003

Preparation of solid ammonium glyphosate using organic solvent in extraction

Applicants:

Wei Wang, Jiande, CN;

Bufan Ren, Jiande, CN;

Shuguang Zhou, Jiande, CN;

Min Bao, Jiande, CN;

Hongchao Zheng, Jiande, CN;

Baiqing Zhang, Jiande, CN;

Jiang LI, Jiande, TW;

Inventors:

Wei Wang, Jiande, CN;

Bufan Ren, Jiande, CN;

Shuguang Zhou, Jiande, CN;

Min Bao, Jiande, CN;

Hongchao Zheng, Jiande, CN;

Baiqing Zhang, Jiande, CN;

Jiang Li, Jiande, TW;

Assignee:

Zhejiang Xin', Zhejiang Province, CN;

Attorney:

Scully, Scott, Murphy & Presser, P.C.

Primary Examiner:

Johann Richter

Assistant Examiner:

Andriae M Holt

Int. Cl.
CPC ...
C07F 9/38 (2006.01); A01N 57/18 (2006.01); C07F 9/22 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method of preparing ammonium glyphosate suitable for preparation of water-soluble solid ammonium glyphosate formulation by an extraction with organic solvent in a gas-liquid-solid phase system, which comprises adding glyphosate and water into a reactor with a stirer, introducing ammonia to carry out the reaction, an aqueous solution of ammonium glyphosate is formed after the reaction is completed; adding a water-soluble organic solvent such as methanol and/or ethanol and/or methylal to decrease the solubility of the ammonium glyphosate in the system, thereby crystallizing out ammonium glyphosate; and filtering in suction or further oven-drying to obtain the solid ammonium glyphosate. The organic solvent may be recovered and reused by rectifying or distilling, the remainder residue may be returned to the reaction procedure or used in the preparation of the aqueous formulation of ammonium glyphosate.

Find Patent Forward Citations

Wang, Wei. (2008). Preparation of solid ammonium glyphosate using organic solvent in extraction (U.S. Patent No. 7435847). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7435847

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