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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 11162040 B1

PDFFull Text
Date of Patent:
Nov. 02, 2021

Filed:

Dec. 28, 2018

Method for preparing low-sulfur biodiesel

Applicant:

Zhejiang University of Technology, Hangzhou, CN;

Inventors:

Yong Nie, Hangzhou, CN;

Fan Xia, Hangzhou, CN;

Qinglong Xie, Hangzhou, CN;

Meizhen Lu, Hangzhou, CN;

Xiaojiang Liang, Hangzhou, CN;

Yanbin Su, Hangzhou, CN;

Jianbing Ji, Hangzhou, CN;

Assignee:

Zhejiang University of Technology, Zhejiang, CN;

Attorneys:

PROI Intellectual Property US

Klaus Michael Schmid

Primary Examiner:

Ellen M McAvoy

Assistant Examiner:

Chantel L Graham

Int. Cl.
CPC ...
C10L 1/02 (2006.01); C11C 3/06 (2006.01); C11C 3/10 (2006.01); C11C 3/00 (2006.01);
U.S. Cl.
CPC ...
C10L 1/026 (2013.01); C11C 3/003 (2013.01); C11C 3/06 (2013.01); C11C 3/10 (2013.01); C10L 2200/0263 (2013.01); C10L 2200/0476 (2013.01); C10L 2270/026 (2013.01); C10L 2290/06 (2013.01); C10L 2290/08 (2013.01);
Abstract

The present invention relates to a method for preparing low-sulfur biodiesel. The method includes the following steps: subjecting raw crude oil to heat exchange, preheating, glycerol esterification reaction, flashing, cooling, transesterification, dealcoholization, sedimentation, and methyl ester rectification to obtain low-sulfur biodiesel up to the standard, where in the heat exchange process, the raw crude oil exchanges heat with flashed oil to recycle some heat, and glycerol and fatty acids in a distilled product subjected to flashing are reused for the glycerol esterification reaction; the dealcoholization process removes methanol in a system after the transesterification, and refined methanol recycled by methanol rectification is reused for the transesterification reaction; crude glycerol generated in the sedimentation process does not need to be treated and is directly used for glycerol rectification to obtain refined glycerol, and the refined glycerol is reused for the glycerol esterification reaction.

Find Patent Forward Citations

Nie, Yong. (2021). Method for preparing low-sulfur biodiesel (U.S. Patent No. 11162040). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11162040

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