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:
Feb. 23, 2016
Filed:
Jan. 21, 2015
Shandong Yuhuang Chemical Co., Ltd., Shandong Province, CN;
Tsinghua University, Beijing, CN;
Jinfu Wang, Beijing, CN;
Yanyan Zheng, Beijing, CN;
Shengwei Wang, Shandong Province, CN;
Tiefeng Wang, Beijing, CN;
Shuangxi Chen, Shandong Province, CN;
Cunfu Zhu, Shandong Province, CN;
SHANDONG YUHUANG CHEMICAL CO., LTD., Shandong Province, CN;
TSINGHUA UNIVERSITY, Beijing, CN;
Abstract
A method for producing polyoxymethylene dimethyl ethers using fluidized bed reactor is provided. The fluidized bed reactor gives high conversion of feedstock during synthesis of polyoxymethylene dimethyl ethers. The product separation process includes pre-rectification, extractive rectification and vacuum rectification in series. In the pre-rectification process, the side-draw fraction PODEis recycled into the fluidized bed reactor, thus product distribution and selectivity to target components in the reactor can be improved. The extractive rectification process realizes coupling of neutralization, extraction, recovery of unconverted feedstock and products separation, thus significantly simplifies the process. The method for preparation of polyoxymethylene dimethyl ethers in this invention is simple, and has high conversion of feedstock, low energy cost and high selectivity to products.