Title:
METHOD AND DEVICE FOR PREPARING ADIPONITRILE
Document Type and Number:
WIPO Patent Application WO/2021/143412
Kind Code:
A1
Abstract:
Provided are a method and device for preparing adiponitrile. The preparation method of the present invention comprises the steps of a first hydrocyanation reaction, an isomerization reaction and a second hydrocyanation reaction, wherein on-line Raman spectroscopy is used for detecting the content of a specific ingredient in the system; and on the basis of the detection results, the reaction conditions are regulated, so as to achieve precise control over a substance in each step in the reaction system. The method of the present invention can reduce the amount of butadiene, thereby reducing the subsequent energy consumption needed for recycling butadiene and equipment investment after reaction; by means of the real time monitoring of the content of hydrocyanic acid, the residue of hydrocyanic acid is reduced to a lower level, and the operation safety and the stability of a catalyst during reaction are improved; and the loss of the catalyst is reduced.
Inventors:
CHEN ZHIRONG (CN)
WU WENBIN (CN)
ZHOU GUIYANG (CN)
FENG MING (CN)
SHI XINGXING (CN)
MA TAO (CN)
FENG ZHICHAO (CN)
ZHANG XIONGWEI (CN)
SUN QING (CN)
XU YONG (CN)
WU WENBIN (CN)
ZHOU GUIYANG (CN)
FENG MING (CN)
SHI XINGXING (CN)
MA TAO (CN)
FENG ZHICHAO (CN)
ZHANG XIONGWEI (CN)
SUN QING (CN)
XU YONG (CN)
Application Number:
PCT/CN2020/135799
Publication Date:
July 22, 2021
Filing Date:
December 11, 2020
Export Citation:
Assignee:
ZHEJIANG NHU CO LTD (CN)
UNIV ZHEJIANG (CN)
ZHEJIANG NHU SPECIAL MAT CO LTD (CN)
UNIV ZHEJIANG (CN)
ZHEJIANG NHU SPECIAL MAT CO LTD (CN)
International Classes:
C07C253/10; C07C255/04
Foreign References:
| CN103080074A | 2013-05-01 | |||
| CN1914160A | 2007-02-14 | |||
| US3153084A | 1964-10-13 | |||
| US4080374A | 1978-03-21 | |||
| US4705881A | 1987-11-10 | |||
| US9932298B2 | 2018-04-03 | |||
| US7659422B2 | 2010-02-09 | |||
| US9296768B2 | 2016-03-29 | |||
| DE102004004672A1 | 2005-08-18 |
Other References:
CHU, XIAOLI ET AL.: "Spectroscopy Process Analytical Techniques Used for On-line Determination of Petrochemicals", MODERN SCIENTIFIC INSTRUMENTS, no. 3, 31 December 2006 (2006-12-31), XP055830147
LI, HUA ET AL.: "The Development of Process Analytical Chemistry", CHINESE JOURNAL OF ANALYTICAL CHEMISTRY, vol. 29, no. 4, 30 April 2001 (2001-04-30), pages 473 - 477, XP055830148
DAI, LIANKUI ET AL.: "Development of Online Raman Analysis System for Chemical Reaction Process", PROCEEDINGS OF THE 5TH INTERNATIONAL FORUM FOR CHINA ONLINE ANALYTICAL INSTRUMENTS AND DEVELOPMENT, 31 December 2012 (2012-12-31), pages 1 - 5, XP055830150
See also references of EP 4023633A4
LI, HUA ET AL.: "The Development of Process Analytical Chemistry", CHINESE JOURNAL OF ANALYTICAL CHEMISTRY, vol. 29, no. 4, 30 April 2001 (2001-04-30), pages 473 - 477, XP055830148
DAI, LIANKUI ET AL.: "Development of Online Raman Analysis System for Chemical Reaction Process", PROCEEDINGS OF THE 5TH INTERNATIONAL FORUM FOR CHINA ONLINE ANALYTICAL INSTRUMENTS AND DEVELOPMENT, 31 December 2012 (2012-12-31), pages 1 - 5, XP055830150
See also references of EP 4023633A4
Attorney, Agent or Firm:
LINDA LIU & PARTNERS (CN)
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