酐

The catalyst prepared by coprecipitation-impregnation has good catalytic performance of maleic anhydride hydrogenation to γ-butyrolactone.

共沉淀-浸渍法制备的20％CuO-20％SnO〓/Al〓O〓催化剂具有较好的顺酐加氢制γ-丁内酯活性，在280℃，顺酐转化率为94.4％，γ-丁内酯选择性为100.0％。

The mechanism for chlorinate acetic acid to monochloroacetic acid by using acetic anhydride or sulfur as catalysts respectively was studied.

通过对硫磺和乙酐催化氯化制备氯乙酸反应机理的分析研究，采用硫磺及乙酐复合催化剂，并且对氯化温度、氯化气氛、尾气回收等进行了过程优化，实现了乙酸氯化反应工艺条件的重大突破，使得氯乙酸的收率达到92.1%。

Kinetics of photo-chlorination of acetic acid to form monochloroacetic acid ;2. The mechanism for chlorinate acetic acid to monochloroacetic acid by using acetic anhydride or sulfur as catalysts respectively was studied.

通过对硫磺和乙酐催化氯化制备氯乙酸反应机理的分析研究，采用硫磺及乙酐复合催化剂，并且对氯化温度、氯化气氛、尾气回收等进行了过程优化，实现了乙酸氯化反应工艺条件的重大突破，使得氯乙酸的收率达到92。

The catalytic activity of Cu/ZnO/A12O3 catalyst for dehydrogenation of 1, 4-butanediol has been studied.

研究了顺酐加氢催化剂Cu/ZnO/Al2O3在常压下对1，4丁二酐脱氢合成γ-丁内酯的催化活性。

The copolycondesation type polyamic acid was synthesized by using pyromellitic dianhydride and 3,3',4,4'-benzophenonetetracarboxylic dianhydride as the dianhydride monomers, 4,4'-diamino diphenylmethane and 4,4'-oxydianiline as the diamine monomers under microwave irradiation in dimethylformamide.

在N，N'-二甲基甲酰胺溶剂中，以均苯四甲酸酐和3，3'，4，4'-二苯酮羧酸二酐为二酐单体，4，4'-二氨基二苯醚和4，4'-二氨基二苯甲烷为二胺单体，采用微波辐射低温溶液共缩聚，合成了聚酰胺酸预聚体，然后亚胺化脱水、环化，生成共缩聚聚酰亚胺。

There are 9 methods,in which the rotary cylinder with internal heating method, decompressing evaporation crystallization method and electrolyze method are more advanced.

关于铬酐制法的评论，各国正在生产的铬酐制法有 9种，以内热式转筒法、减压蒸发结晶法和电解法更先进。

Methods 106 hypertensive patients were randomized into lacidipine group (n=53) and fosinopril group (n=53). The excretive rate of urinary albumin, the clearance endogenous creatinine, and blood and urine β2 microglobulin (β2-MG) were detected before and after treatment.

选择106例高血压2~3级患者，随机分为拉西地平组和福辛普利组，治疗前后检测血压和尿蛋白排泄量、内生肌酐清除率、血清肌酐、血清尿素氮及血、尿β2微球蛋白(β2-MG)，采用彩色多普勒超声检查测量肾动脉管壁厚度及内径。

Methods:Thyroid function,thyroid microsome antibody,and thyroid globulin antibody were determined with radioimmunoassay in 23 CRF complicated by primary hypothyroidism patients,and the serum calcium,phosphorus,potassium, cholesterol, glucose, urea nitrogen, hemoglobulin,and endogenous creatinine clearance rate were also assayed.

用放射免疫法测定23例CRF合并甲减患者的甲状腺功能、甲状腺微粒体抗体、甲状腺球蛋白抗体及检测血清钙、血清磷、血清钾、血清胆固醇、血清肌酐、血糖、尿素氮、血红蛋白、内生肌酐清除率并与31例单纯CRF患者对照进行分析。

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。

Reactor Construction: Multitube reactor systems for chemical industry ( all technical heat transfer fluids,particularly mkoltensalt 50 years experience) for production of:phthalic anhydride,maleic anhydride,acrolein,methyl methacrylate,methanol,ethylene oxide and other endothermic and exothermic catalytic gasphase processes.

反应器制造部：列管反应器系统，用于化学工业(所有工业用热交换流体，特别是熔盐传热)中生产苯酐，顺酐，丙烯醛，丙烯酸，甲基丙烯酸甲酯，甲醇，环氧乙烷及其他放热与吸热气相催化生产工艺。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。