脱水环化

脱水环化：乙酸酐，回流，2h，97%。

Cyclization : acetic anhydride , reflux , 2 h , 97 % .

考察了无机酸对二甘醇（DEG）脱水环化制备1,4-二氧六环（DOX）反应的催化效果。

The catalytic performance of mineral acids for the synthesis of 1 , 4-dioxane by cyclodehydration of DEG was studied .

研究了H2SO4催化一缩二乙二醇（二甘醇）脱水环化生成1,4-二氧六环液相反应的速率与温度、H2SO4浓度的关系。

A method and apparatus for studying the kinetics of liquid phase dehydration reaction of diethylene glycol forming 1,4-dioxane are presented , The relationships between the dehydration rate and the reaction temperature and concentration of H_2SO_4 catalyst have been investigated .

酸催化二甘醇脱水环化反应研究

Study on Dehydration Reaction of DEG over Acid Catalysts

1,4-丁二醇气相脱水环化制四氢呋喃催化剂和工艺的研究

Study on Catalyst and Process Conditions of 1,4-Butanediol Dehydration for Producing Tetrahydrofuran-Gas Phase Method

1,4-丁二醇液相脱水环化制四氢呋喃

1,4-Butanediol Liquid Phase Dehydration for Producing Tetrahydrofuran

衣康酸酐是一种可由微生物发酵提取，并经过脱水环化制得的一种新型无毒可再生化工原料。

As a kind of nontoxic and recyclable chemical material , itaconic anhydride can be manufactured by the process consists of bio-fermentation and cyclodehydration .

以大孔阳离子交换树脂为催化剂，在150°～170℃，200～760mmHg柱压力下，使二甘醇脱水环化，制取1,4&二恶烷。

1,4-Dioxane was prepared by dehydration and cyclization of diethylene glycol at 150 - 170 ℃ and 200-760 mmHg in the presence of macroreticular cation exchange resins as catalysts .