Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PREPARATION METHOD FOR LIGHT-COLORED VITAMIN A
Document Type and Number:
WIPO Patent Application WO/2023/108327
Kind Code:
A1
Abstract:
The present application discloses a preparation method for light-colored vitamin A, comprising: reacting pentadecane phosphonate or pentadecane phosphonium salt with 2-methyl-4-acetoxy-2-butenal and alkali to generate vitamin A, wherein the content of 2-methyl-4-acetoxybutyraldehyde in the 2-methyl-4-acetoxy-2-butenal is not more than 1 wt%. The vitamin A obtained by the preparation method of the present application is light in color and high in yield, and an additional decolorization process does not need to be added.

Inventors:
LV YINGDONG (CN)
LUO ZHAOHUI (CN)
LIN LONG (CN)
ZHANG XU (CN)
CHENG XIAOBO (CN)
ZHANG TAO (CN)
ZHANG YONGZHEN (CN)
LI YUAN (CN)
Application Number:
PCT/CN2021/137387
Publication Date:
June 22, 2023
Filing Date:
December 13, 2021
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
WANHUA CHEMICAL GROUP CO LTD (CN)
WANHUA CHEMICAL NINGBO CO LTD (CN)
International Classes:
C07C67/343; C07C69/145
Foreign References:
CN111484525A2020-08-04
CN111484524A2020-08-04
CN109651150A2019-04-19
US5424478A1995-06-13
CN113214126A2021-08-06
CN1097414A1995-01-18
CN112876395A2021-06-01
CN111995555A2020-11-27
CN105949101A2016-09-21
CN112457229A2021-03-09
CN110143874A2019-08-20
CN101219983A2008-07-16
CN103044302A2013-04-17
Other References:
ZHUANCHENG LI: " Review on Synthetic Technology of Vitamin A", CHEMICAL ENGINEERING & EQUIPMENT, vol. 2009, no. 2, 15 February 2009 (2009-02-15), pages 95 - 100, XP093071960
Attorney, Agent or Firm:
SINO-CREATIVITY INTELLECTUAL PROPERTY LAW FIRM (CN)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: Use of C20-36 fatty alcohol in preparation of O/W emulsions with low viscosity

Next Patent: PACKET ROUTING IN A LAYER 2 MESH NETWORK