Researching the synthetic technology of tris ( 2 , 4 , 6 - tribromopheny ) phosphate , and discussing the influences of reaction condition to the yield 摘要研究了磷酸三（ 2 , 4 , 6 -三溴苯基）酯的合成工艺，并探讨了反应条件对收率等的影响。
The effects of reaction time , feeds mole ratio , and the amount of catalyst used in the esterification on the yield were discussed 探讨了反应时间、醇酸摩尔比、催化剂用量以及带水剂用量对酯化收率的影响，确定了较适宜的反应条件。
The hydrazinecarbothioamide was prepared from hydrocyanic acid , hydrazine hydrate , and sulphur . the total yield is over 80 % 摘要介绍了以氢氰酸、水合肼、硫磺为主要原米制备氨基硫脲的工艺过程，探讨了合成工艺条件，反应总收率在80 %以上。
The effect of proposed rto scheme was validated in an overburdened real chemical plant , which implies the effectiveness and practicability of the technique 通过四个月的实时优化实施，有效地提高了乙醛收率，促进了操作经验和优化理论的结合。
Carboxyethyl ( phenyl ) phosphinic acid with the yield of 69 . 2 % was synthesized from phosphorous trichloride , benzene , sodium chloride and acrylic acid 以三氯化磷、苯、三氯化铝、氯化钠、丙烯酸为原料合成了阻燃剂2 -羧乙基苯基次磷酸，收率69 . 2 % 。
The conversion , the utilization rate of raw materials and the product yield of esterification reactions are raised by applying the catalytic rectification process 摘要催化精馏技术应用于酯化反应体系，提高了反应的转化率、原材料利用率和产品收率。
Under the optimum preparation conditions , the particle dimension of the resultant vo2 synthesized is 0 . 5 m , the yield is more than 90 % and the purity is 99 % 在最佳合成条件下，所得产物vo _ 2的晶粒尺寸在15 . 2nm左右，收率达90以上，纯度为99 。
Cyclohexene can be directly oxidized to adipic acid with 30 % h2o2 in the presence of h7 [ p ( w2o7 ) 6 ] ? xh2o without any phase transfer catalyst and organic solvents 摘要报道了在无相转移剂条件下，用磷钨酸催化过氧化氢氧化环己烯合成己二酸，收率最高为72 . 6 % 。
Beginning with fluorobenzaldehyde , cyfluthrin was synthesized by bromination , acetalation , etherification , hydrolysis , and esterification , with a total yield of 45 % 以对氟苯甲醛为起始原料，经过溴化、缩醛化、醚化、水解、酯化合成氟氯氰菊酯，总收率45 % 。
Abstract : relationships between fluidity and carbon yields of the modified pitches , which were prepared by different methods and under different conditions , have been investigated 文摘:初步探讨了不同方法及工艺条件下所得改性沥青流动性与炭收率的相互关系。
