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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 9902680 B1

PDFFull Text
Date of Patent:
Feb. 27, 2018

Filed:

Feb. 11, 2015

Method for processing acetic acid solvent in oxidising unit of pta industrial apparatus

Applicant:

Tianhua Institute of Chemical Machinery and Automation Co., Ltd, Gansu, CN;

Inventors:

Xu Zhao, Gansu, CN;

Wanyao Zhang, Gansu, CN;

Zhongxin Sun, Gansu, CN;

Maikui Zhang, Gansu, CN;

Yongpeng Tan, Gansu, CN;

Xiangnan Zhai, Gansu, CN;

Tianbao Wang, Gansu, CN;

Tao Shen, Gansu, CN;

Rui Wang, Gansu, CN;

Yuanyue Liang, Gansu, CN;

Xiaopeng Feng, Gansu, CN;

Guohai Zhang, Gansu, CN;

Assignee:

TIANHUA INSTITUTE OF CHEMICAL MACHINERY AND AUTOMATION CO., LTD, Gansu, CN;

Attorney:

Muncy, Geissler, Olds & Lowe, P.C.

Primary Examiner:

Yevgeny Valenrod

Assistant Examiner:

Blaine G Doletski

Int. Cl.
CPC ...
C07C 51/42 (2006.01); C07C 51/47 (2006.01); B01D 25/12 (2006.01); C07C 53/08 (2006.01); C07C 63/26 (2006.01);
U.S. Cl.
CPC ...
C07C 51/47 (2013.01); B01D 25/12 (2013.01); C07C 53/08 (2013.01); C07C 63/26 (2013.01);
Abstract

The present invention relates to a method for processing acetic acid solvent in an oxidizing unit of a PTA industrial apparatus; said method uses a pressure filter machine to filter crude terephthalic acid slurry, and then, using a multi-stage counter-current method, uses washing water to wash the acetic acid solvent, and, by means of setting up a bias-current and drainage, prevents residual liquid in the filtrate pipe from entering the next area following the rotation of the pressure filter machine, improving washing efficiency and reducing the amount of washing water; the present invention integrates the processes of filtering and washing crude terephthalic acid into a single pressure filter machine, such that the process is shorter, the occupied floor space is reduced, and energy consumption is lower. A method feeding nitrogen gas into the mother liquor tank and washing liquid tank is used to regulate the pressure balance of the system.

Find Patent Forward Citations

Zhao, Xu. (2018). Method for processing acetic acid solvent in oxidising unit of pta industrial apparatus (U.S. Patent No. 9902680). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9902680

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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