脱水环化
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脱水环化:乙酸酐,回流,2h,97%。
Cyclization : acetic anhydride , reflux , 2 h , 97 % .
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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 .
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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 .
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酸催化二甘醇脱水环化反应研究
Study on Dehydration Reaction of DEG over Acid Catalysts
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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
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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
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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 .
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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 .