Method for separating and preparing mono, bis-pentaerythritol and its by-product using high temperature condensation and concatenate recrystallization

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-temper...

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Main Authors BIAN PINGGUAN, HE HUAZHONG, ZHANG YEXIANG, DONG JINJUN, FENG JIAXIN, LI YUANHAI, HUANG LEGUAN, JIANG YUANHUA, YANG XIAOQIN
Format Patent
LanguageChinese
English
Published 04.02.2009
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary: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.
Bibliography:Application Number: CN200510018998