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Title:
ENHANCING SYSTEM AND PROCESS FOR PREPARING POLYETHYLENE ON BASIS OF SOLUTION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/047035
Kind Code:
A1
Abstract:
The present invention relates to an enhancing system and a process for preparing polyethylene on basis of a solution method, comprising: an ethylene storage tank, a reactor, a micro-interface generator, a killer, a desolvation tank, a rectification tower, a flash tank, a separation tank, a first drying tower, and a second drying tower. In the present invention, ethylene is broken up to form micron-scale bubbles, and the micron-scale bubbles are mixed with a solvent to form a gas-liquid emulsion, so that the phase interface area of gas-liquid two phases is enlarged, the thickness of a liquid film is reduced, the mass transfer resistance is reduced, and the effect of enhancing mass transfer in a lower preset operation condition range is achieved; and all of the micron-scale bubbles can be fully mixed with the solvent to form the gas-liquid emulsion; by fully mixing the gas-liquid two phases, it can be ensured that ethylene and an initiator in the system can be fully contacted with the solvent, further improving polymerization efficiency of the system.

Inventors:
ZHANG ZHIBING (CN)
LI LEI (CN)
ZHOU ZHENG (CN)
ZHANG FENG (CN)
MENG WEIMIN (CN)
WANG BAORONG (CN)
YANG GAODONG (CN)
LUO HUAXUN (CN)
YANG GUOQIANG (CN)
TIAN HONGZHOU (CN)
CAO YU (CN)
Application Number:
PCT/CN2019/120089
Publication Date:
March 18, 2021
Filing Date:
November 22, 2019
Export Citation:
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Assignee:
NANJING YANCHANG REACTION TECH RESEARCH INSTITUTE CO LTD (CN)
International Classes:
C08F110/02; B01J10/00; C08F2/01; C08F2/04; C08F2/06; C08F6/00; C08F10/02; C08F210/02; C08F210/16
Foreign References:
CN106414509A2017-02-15
CN106268544A2017-01-04
CN106215730A2016-12-14
CN107335390A2017-11-10
CN102688709A2012-09-26
CN1431927A2003-07-23
CN102256696A2011-11-23
CN108530568A2018-09-14
CN208066329U2018-11-09
CN101754987A2010-06-23
CN109438594A2019-03-08
US3554995A1971-01-12
JPS58132009A1983-08-06
Other References:
ZHANG ZHIBING; TIAN HONGZHOU; ZHANG FENG; ZHOU ZHENG: "Overview of Microinterface Intensification in Multiphase Reaction Systems", JOURNAL OF CHEMICAL INDUSTRY AND ENGINEERING, HUAXUE GONGYE CHUBANSHE, CN, vol. 69, no. 1, 6 November 2007 (2007-11-06), CN, pages 44 - 49, XP009526633, ISSN: 0438-1157, DOI: 10.11949/j.issn.0438-1157.20171400
SAEKI KOJI ET AL.: "Separation", POLYMER MANUFACTURING PROCESSES, 1ST EDITION, 1ST PRINTING, 31 December 1977 (1977-12-31), pages 88 - 97, XP009526658
JU KONG: "Encyclopedia of Chemical Industry", vol. 9, 30 June 1995, CHEMICAL INDUSTRY PRESS, CN, ISBN: 7-5025-0846-5, article EDITORIAL BOARD OF THE “ENCYCLOPEDIA OF INDUSTRIAL CHEMISTRY: "Chemical solution method", pages: 330 - 334, XP009526661
PEI XIAOJING, SUN CONGCONG; SUN LIPENG: "Slurry Polymerization process for production of HDPE and its application progress in domestic", QILU PETROCHEMICAL TECHNOLOGY, vol. 43, no. 2, 1 January 2015 (2015-01-01), pages 166 - 170, XP055790518
Attorney, Agent or Firm:
BEIJING ZHONGSUO INTELLECTUAL PROPERTY AGENCY CO. LTD (CN)
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