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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 10782241 B1

PDFFull Text
Date of Patent:
Sep. 22, 2020

Filed:

Jul. 27, 2018

Method of determining residual flocculant in effluent of an industrial clarification process

Applicant:

Ecolab Usa Inc., St. Paul, MN (US);

Inventors:

Hua Zheng, Aurora, IL (US);

Xiaodong Huang, Aurora, IL (US);

Tiandi Zhuang, Bolingbrook, IL (US);

Lan Xiao, Naperville, IL (US);

Patrick G. Murray, Yorkville, IL (US);

Philip M. Eastin, St. Louis, MO (US);

Assignee:

Ecolab USA Inc., St. Paul, MN (US);

Attorney:

Leydig Voit and Mayer, Ltd.

Primary Examiner:

Maurice C Smith

Int. Cl.
CPC ...
G01N 21/84 (2006.01); G01N 1/28 (2006.01); G01N 21/31 (2006.01); C02F 1/52 (2006.01); B01D 15/08 (2006.01); B01D 17/02 (2006.01); G01N 15/06 (2006.01); B01D 17/00 (2006.01); C02F 1/38 (2006.01); C02F 1/44 (2006.01); C02F 103/32 (2006.01); C02F 1/54 (2006.01); C02F 1/24 (2006.01); G01N 1/40 (2006.01); G01N 21/78 (2006.01); G01N 15/00 (2006.01);
U.S. Cl.
CPC ...
G01N 21/84 (2013.01); B01D 15/08 (2013.01); B01D 17/0217 (2013.01); B01D 17/085 (2013.01); C02F 1/5209 (2013.01); G01N 1/28 (2013.01); G01N 15/06 (2013.01); G01N 21/31 (2013.01); C02F 1/24 (2013.01); C02F 1/385 (2013.01); C02F 1/44 (2013.01); C02F 1/54 (2013.01); C02F 2103/32 (2013.01); C02F 2209/003 (2013.01); G01N 1/40 (2013.01); G01N 21/78 (2013.01); G01N 2015/0053 (2013.01); G01N 2015/0693 (2013.01); G01N 2021/8405 (2013.01); G01N 2021/8411 (2013.01);
Abstract

A method of detecting free flocculant polymer having a net charge present in an aqueous phase of a multi-phase substance is provided. The multi-phase substance comprises a solid phase, an organic phase, and the aqueous phase. The method comprises separating the solid phase from the multi-phase substance to form a dual phase top liquid comprising the organic phase and the aqueous phase; separating the organic phase from the dual phase top liquid, leaving the aqueous phase; combining the free flocculant polymer in the aqueous phase and a dye having an opposite net charge than that of the free flocculant polymer, thereby causing a spectroscopically observable change in the aqueous phase; and analyzing the aqueous phase via spectrometry to determine the concentration of the free flocculant polymer in the multi-phase substance.

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