查询词典 maleic acid

ABSTRACT Agent TJ-201 is an organic phosphonocarboxylic acid containing maleic group, p hosphonic group, and ethoxyl group etc.

摘 要 TJ-201是一种含马来酸基、磷酸亚基、氧乙烯基等的膦基聚羧酸。

A high-yielding mutant Rhizopus arrhizus R4 producing γ-linolenic acid was successfully obtained when the original strain Rhizopus arrhizus R0 was treated by UV,and by the screening methods of resisting maleic hydrazide.

以少根根霉R0为出发菌株，利用紫外诱变结合失水苹果酰肼筛选的方法，选育出突变株R4，摇瓶培养菌体油脂含量35.55%，其中GLA占油脂的12.5%，比原始菌株油脂含量提高了93.94%，GLA提高了276.5%。

Green scale inhibiter ; polyaspartic acid ; maleic anhydride ; synthesis ; biodegradation

绿色阻垢剂；聚天冬氨酸；马来酸酐；合成；生物降解

In the paper the effects and main differences of maleic anhydride and acrylic acid in the synthesis of polycarboxylate superplasticizers are analyzed according to their respective characteristics and technical requirements for synthesis.

根据马来酸酐与丙烯酸各自的特性和聚羧酸盐减水剂合成的技术要求，分析了它们在合成过程中的作用和主要差别，并概述了马来酸酐在合成中的应用情况，最后提出了马来酸酐在合成中应用的几点建议。

Besides, the derivatives were synthesized successfully by the similar acid binding agent system, such as tris(4-nitrophenyl) thiophosphate, tris(4-toluene)thiophosphate. The derivative of maleic anhydride was synthesized by the simple method, and its yield was above 90%.

采用类似的缚酸剂体系成功地合成了硫代磷酸三(4-硝基苯)酯、硫代磷酸三(4-甲基苯)酯，并用简单的方法合成了硫代磷酸三(4-氨基苯)酯的马来酸酐衍生物——硫代磷酸三(4-马来酸氨基苯)酯，产率达90％以上。

Epoxy acrylic resin and epoxy monoacrylate resin were synthesized from biphenol A epoxy resin and acrylic acid , then a new UV-curing resin was synthesized through the reaction of them and maleic anhydride.

本文先采用双酚A环氧树脂和丙烯酸合成了环氧丙烯酸酯和环氧单丙烯酸酯，再以它们和顺酐作为反应的原料，进行反应最终合成了一种新型UV固化树脂。

A series of important basic and fine chemical products (such as 1,4-butyl -glycol,γ-butyrolactone, tetrahydrofuran, fumaric acid and tetra-hydride pa)can be produced when maleic anhydride is used as the raw material.

以顺酐为原料还可以生产1，4-丁二醇、γ-丁内酯、四氢呋喃、富马酸和四氢苯酐等一系列重要的基本化学品和精细化学品等。

The optimum reaction conditions were that the molar ratio of maleic anhydride and p-nitroaniline was 1.2:1, the volume ratio of toluene and DMF was 10:1, the amination temperature was 20~30℃ the cyclization temperature was 145~150℃ and the cyclization time was 6 h over; the amount of p-toluene sulfonic acid was 12% of total reactant mass, the amount of copper sulfate was 0.1~0.5% of total reactant mass, the amount of hydroquinol was 0.1% of total reactant mass.

得到的最佳工艺条件是：n：n为1.2：1，V：V为10：1；胺化反应温度为20~30℃，环化反应温度为140~150℃，环化反应时间为6h以上；对甲基苯磺酸用量为反应物总质量的1%~2%；硫酸铜用量为反应物总质量的0.1%~0.5%；对苯二酚用量为反应物总质量的0.1%。

The synthesis of dimethyl fumarate was studied from maleic anhydride and methanol with phospho molybdic acid as the catalyst and bromate as the isomerization catalyst by one-step in this short paper.

采用固体杂多酸磷钼酸为催化剂，溴酸盐为异构化剂，经顺酐一步合成了富马酸二甲酯，探讨了醇酐比、反应时间、催化剂的量、异构化剂的量以及异构化时间对合成DMF收率的影响，并确立了最佳反应条件。

The possible mechanism was discussed. These bowl-shaped aggregates are promising candidates for nano reactor or drug carrier.4 2,7-dimethylene-1,4,6-trioxaspiro[4, 4]nonane with two vinyls was prepared to be used as electron-donor and crosslinker. The ATRP of this crosslinker and excess methylacrylate (used as electron-accpetor) was proved to mainly form homopolymers. With the chain-transfer agent S-1-Dodecyl-S\'-(α,α\'-dimethyl-α-acetic acid)trithiocarbonate, the copolymerization of the spiro hydrocarbon, maleic anhydride and MA by RAFT method produced star PMA.

这些由聚电解质复合物自组装形成的聚集体，在微反应器和药物释放等领域具有潜在的应用前景。4合成了双乙烯基的2，7-二亚甲基-1，4，6-三氧杂螺环烷，作为给电子单体和交联剂，与吸电子单体马来酸酐或过量的丙烯酸甲酯形成电荷转移络合物共同聚合，尝试了用ATRP和RAFT方法一步法合成星形聚合物。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐