查询词典 basic anhydride

The acid anhydride is firstly isomerized and esterified with castor oil on 12-hydroxyl of eastor oil acid to improve the rheological and tribological characteristic.

详细考察了合成酯和植物油的烷链结构对流变性能和摩擦特性的影响。

By using polymerizable surfactants, the stability of the latex and water resistance of the film can be improved. Sodium monoalkyl maleates polymerizable surfactants, sodium monoalkylpolyoxyethylene maleates polymerizable surfactants and N-methyl-N-monododecylfumaroyl taurine polymerizable surfactants are synthesized, by using normal fatty alcohols, alkyl poly ether and maleic anhydride.

以直链脂肪醇、脂肪醇聚氧乙烯醚和马来酸酐为起始原料，设计合成了马来酸单脂肪醇酯钠盐A系列、马来酸单脂肪醇聚氧乙烯醚酯钠盐B系列、N-甲基-N-脂肪醇单酯富马酰基-牛磺酸钠D系列的可聚合乳化剂。

The special PP material for sound box is developed with polyolefin elastomer and ethylene/propylene/diene copolymer as the tougheners, polypropylene grafted with maleic anhydride as the compatibilizer and talcum as the inorganic fillers.

以聚烯烃弹性体和共聚物为增韧剂，马来酸酐接枝聚丙烯为增容剂，滑石粉为无机填科研制音箱用聚丙烯专用料。

Piperidinecarboxylic acid is used as the raw material and acetic acid as the acylating agent, followed by the addition of some acetic anhydride in the later stage to get an important organic intermediate n-acetylpiperidine-4 carboxylic acid in the yield of 92%. Toluene is used as the solvent instead of sulfinyl chloride in the acyl chlorination to produce n-acetylpiperidine-4-carbonyl chloride with the yield of 97%.

以4-哌啶甲酸为原料、醋酸为酰化剂，后期加入少量醋酸酐反应得到中间体N-乙酰基哌啶－4-甲酸，收率92%；在甲苯溶剂中进行酰氯化得目标产物N-乙酰基哌啶－4-甲酰氯，收率97%。

Selenium dioxide;selenous acid anhydride ...

化工产品物性辞典

Another innovation in this thesis is that another cheap and safecomplexant—sodium chloride has been found, but pyridine, phosphorus oxychloride,and phosphoric anhydride etc mentioned in documents were given up.

本文另一创新点在于为反应找到了一种廉价安全的络合剂—氯化钠，摒弃了文献中常用的吡啶、三氯氧磷、五氧化二磷等络合剂。

Have been developed with an annual output of 500 tons of potassium alum red, 1,000 tons of chromium anhydride, sodium sulfide 7,000 tons, 1,000 tons Yanghuagelv and a series of products, the output value of more than 120 million.

九五年以来相继开发了年产500吨红矾钾，1000吨铬酸酐，7000吨硫化碱，1000吨氧化铬绿等一系列产品，年产值超过1.2亿元。

In esterification of 2,6-NDA obtained from Henkel reaction of 1,8-naphthalenedicarboanhydride catalyzed non-cadmium catalyst zinc carbonate, the effect of process parameters like esterification catalyst and its amount used, reaction temperature and time, and methanol/anhydride molar ration, etc, was investigated.

在碳酸锌催化和二氧化碳气氛中1，8-萘二甲酸酐于300～340℃反应3～4小时，可以较高收率地获得2，6-萘二甲酸粗品，收率达到62％，该产物可以直接用于合成双酯的酯化反应中。

A variety of aldehydes were converted into acylals in good yields with anhydride in the presence of a catalytic amount of zinc bromide under solvent-free conditions.

以醛和酸酐为原料，溴化锌为催化剂，无溶剂条件下高产率地合成了偕二酸酯（其中醛与苯甲酸酐的反应是首次报道）。

Ton large anhydride reaction device and 25m3 anhydrous glucose crystallizer have been listed in national key product program respectively in 2000 and 2003, and forced circulation vacuum evaporating crystallizer has been listed in the 2003 Innovation Fund Program by the Ministry of Science and Technology.

本项目中的2万吨大型反应装置、连续结晶器及强制循环真空蒸发结晶器均通过了国家鉴定和科技部组织的专家评审，2万吨大型苯酐反应装置、25m3无水葡萄糖结晶器被列入2000年、2003年国家重点新产品计划，强制循环真空蒸发结晶器装置被科技部列入2003年创新基金计划。

I was just taking her hand, to help her out of a car, and I knew it.

我只是握着她的手，扶她下车，但我知道这一切。

China and South Korea have excoriated Japan over its approval of new school books which they say whitewash the atrocities committed during Japanese occupation, and anti-Japanese protests have been held in Chinese cities. The lingering bitterness over Japan's past imperialism still threatens to mar relations between the big East Asian powers

中国和韩国强烈谴责日本通过新的中学历史教科书，他们认为这一教科书掩盖了日本在其占领期间所犯下的残酷暴行，反日抗议活动在中国数座城市发生，历史上日本帝国主义制造的痛楚无法被忘却，这有可能破坏东亚强国间的关系。