Title:
ペンタエリトリトールの製造方法
Document Type and Number:
Japanese Patent JP4938773
Kind Code:
B2
Abstract:
A method of preparing monopentaerythritol, dipentaerthritol, and sodium formate through high temperature condensation and cascade recrystallization is disclosed. The method lowers the energy consumption dramatically and improves the cost-effectiveness by carrying out the reaction in a non-low-temperature zone, and thereby avoiding the requirement for refrigeration. The method alleviates the difficulty of separation and improves the product quality by means of cascade separation process, and thereby avoiding the low purity from a single separation. In addition, the mother liquor obtained after each separation step is recycled to the previous step as the recycling liquor, which avoids discharging waste, increases the product yield and lowers raw materials consumption.
Inventors:
Jiang far flower
Yang Akatsuki work
Plaintiff
Feng Kashin
Progress Army
What Hana
Lee Yuan Hai
Zhang work sho
Yellow Easy View
Yang Akatsuki work
Plaintiff
Feng Kashin
Progress Army
What Hana
Lee Yuan Hai
Zhang work sho
Yellow Easy View
Application Number:
JP2008518596A
Publication Date:
May 23, 2012
Filing Date:
March 31, 2006
Export Citation:
Assignee:
HUBEI YIHUA CHEMICAL INDUSTRY CO., LTD.
International Classes:
C07C29/38; C07C29/78; C07C31/24; C07C41/09; C07C41/40; C07C43/13
Domestic Patent References:
| JP9309848A | ||||
| JP53073507A | ||||
| JP33003869B1 | ||||
| JP58008028A |
Foreign References:
| US4277620 | ||||
| GB958654B |
Attorney, Agent or Firm:
Koichi Washida