Title:
METHOD FOR CONTINUOUS PREPARATION OF HIGH BULK DENSITY METHIONINE CRYSTAL
Document Type and Number:
WIPO Patent Application WO/2016/127707
Kind Code:
A1
Abstract:
The present invention relates to a method for the continuous preparation of high bulk density methionine crystals. The process of the method is as follows: a hydrolysate, which is obtained from a reaction of 5-(β-methylthioethyl)hydantoin and a potassium carbonate solution, is mixed with an external circulation material from a DTB neutralization crystallizer having a gas phase neutralization section; after the mixture is cooled, the mixture enters a liquid distributor of a neutralization region in the upper part of the crystallizer; the mixture is sprayed in liquid droplets or trickles into carbon dioxide gas for neutralization reaction, and then naturally falls into a crystallization region in the lower part to be mixed with a material in the region; the mixture grows on small crystals in a system to form crystals having larger particle diameters, and meanwhile new crystal nucleuses are formed; in a settling region in the middle part of the crystallization region, the crystals having larger particle diameters sink into an elutriation leg, while the small crystals circulate with the external circulation material, and a part of the external circulation material is used for elutriating the crystals in the elutriation leg, and another part of the same is used for mixing with the hydrolysate; and the crystals in the elutriation leg are separated, washed and dried to obtain the high bulk density methionine product.
Inventors:
CHEN ZHIRONG (CN)
WANG ZHIXUAN (CN)
CHEN CONG (CN)
WANG ZHENGJIANG (CN)
WANG CUNCHAO (CN)
LI YIN (CN)
ZHANG ZHIXIANG (CN)
WANG ZHIXUAN (CN)
CHEN CONG (CN)
WANG ZHENGJIANG (CN)
WANG CUNCHAO (CN)
LI YIN (CN)
ZHANG ZHIXIANG (CN)
Application Number:
PCT/CN2015/098368
Publication Date:
August 18, 2016
Filing Date:
December 23, 2015
Export Citation:
Assignee:
SHANDONG NHU AMINO ACID CO LTD (CN)
UNIV ZHEJIANG (CN)
ZHEJIANG NHU CO LTD (CN)
UNIV ZHEJIANG (CN)
ZHEJIANG NHU CO LTD (CN)
International Classes:
C07C323/58; B01D9/02; C07C319/28
Foreign References:
| CN104744326A | 2015-07-01 | |||
| CN1589259A | 2005-03-02 | |||
| CN1274717A | 2000-11-29 | |||
| CN1376671A | 2002-10-30 | |||
| CN101602701A | 2009-12-16 | |||
| CN101602700A | 2009-12-16 | |||
| CN1636975A | 2005-07-13 | |||
| CN104203912A | 2014-12-10 | |||
| JPH04169570A | 1992-06-17 | |||
| CN1599712A | 2005-03-23 | |||
| US5463120A | 1995-10-31 |
Other References:
ZHOU XUEJIN ET AL.: "Characteristics of Computational Fluid Dynamics in External-cycling Fluidized DTB Crystallizer", JOURNAL OF SALT AND CHEMICAL INDUSTRY, vol. 40, no. 3, 31 May 2011 (2011-05-31), pages 30 - 32, XP008185761
GAO, WENLIANG ET AL.: "Advance in Production Process And Key Manufacture Technology for Methionine", CHEMICAL INDUSTRY AND ENGINEERING PROGRESS, vol. 31, no. 4, 31 December 2012 (2012-12-31), pages 866 - 872, XP008185760
GAO, WENLIANG ET AL.: "Advance in Production Process And Key Manufacture Technology for Methionine", CHEMICAL INDUSTRY AND ENGINEERING PROGRESS, vol. 31, no. 4, 31 December 2012 (2012-12-31), pages 866 - 872, XP008185760
Attorney, Agent or Firm:
LINDA LIU & PARTNERS (CN)
北京林达刘知识产权代理事务所(普通合伙） (CN)
北京林达刘知识产权代理事务所(普通合伙） (CN)
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