查询词典 acid hydrobromic

hydantoin was synthesized from diethyl malonate comprising condensation with 1, 2-dichloroethane, ammonolysis to diamide, Hoffmann degradation to give 5-cyclopropanespirohydantoin, and ring-opening with 40% hydrobromic acid.

以丙二酸二乙酯为原料，先与1， 2-二氯乙烷缩合生成1， 1-环丙烷二羧酸二乙酯，再经氨解生成1， 1-环丙烷二甲酰胺，然后在次氯酸钙溶液中进行Hoffmann降解成环生成5-环丙螺海因，最后在40%氢溴酸中开环得到5-溴乙基海因。

The effect of various conditions on the reaction, such as solvent, temperature, the amount of catalyst, the concentration of hydrobromic acid, oxygen/air and so on, was studied.

在此基础上，系统地考察了溶剂、温度、催化剂用量、氢溴酸的浓度、氧气/空气等因素对芳香化合物氧化溴化反应的影响。

Benzyl bromide was synthesized from dibenzyl ether and hydrobromic acid with SO42-/ TiO2 as catalyst and cyclohexane as dehydrant.

以二苄醚和氢溴酸为原料，SO42-/TiO2为催化剂，环已烷为带水剂，合成了溴化苄。

Butyl bromide was synthesized from hydrobromic acid(48%) and 2-butylalcohol by adding concentrated sulfuric acid.

以质量分数为48%的氢溴酸水溶液、仲丁醇为反应原料，浓硫酸为催化剂合成仲溴丁烷，考察了反应原料和催化剂用量以及反应时间对产率的影响。

Hydrobromic acid and hydroiodic acid, but also react each other and give out the hydrosulfide gas.

实验结果表明黑色硫化汞能溶于热浓盐酸、氢溴酸和氢碘酸中，并与其反应放出硫化氢气体。

Bromododecane was synthesized from n-dodecyl alcohol using byproduct hydrobromic acid from 1-bromoadamantan process as raw material in the presence of the concentrated sulfuric acid.

以生产溴代金刚烷得到的副产品氢溴酸为原料，在浓硫酸存在的条件下与正十二醇进行反应合成1-溴代十二烷。

The alternative method of O-demethylation,methane sulfonic acid/DL-methionine and hydrobromic acid were investigated.

方法在以蒂巴因为原料，经氧化、氢化、酰化、氰化、去氧甲基、水解、N-烯丙基化得到纳洛酮的合成路线中，分别采用甲磺酸/DL-甲硫氨酸和氢溴酸代替三溴化硼进行去氧甲基化和后续水解反应。

In this paper, initiator is dissolved in 1-bromopropane which is solvent. Then the propene and hydrogen bromide that can be dissolved in 1-bromopropane are inlet in l-bromopropane when initiator is decomposing. The reaction occurs in fluid phase and high-purity 1-bromopropane is synthesized by one step method. In this paper, the material HBr is synthesized with NaBr and sulfuric acid at the presence of hydrobromic acid.

本论文以1-溴丙烷为溶剂，将引发剂溶于其中，加热到引发剂开始分解时再通入丙烯和HBr，使二者溶解于1-溴丙烷中，在液相中进行反应，实现丙烯&一步法&合成高纯1-溴丙烷利用NaBr与硫酸在氢溴酸存在下反应制备HBr气体，以作为合成1-溴丙烷的原料。

Results The synthesis condition was improved. The method of methane sulfonic acid/DL-methionine was found an ideal substitute of BBr3 for less cost. While using hydrobromic acid, the O-demethylation and hydrolyzation could be combined in one stage.

结果 优化了纳洛酮的合成工艺，甲磺酸／DL-甲硫氨酸法试剂价格低廉，可降低生产成本；而氢溴酸法不但试剂价格更低，还可将去氧甲基化和水解合并为一步反应，使新工艺的总收率提高到59.90%，产品质量符合中国药典。

Antimony samples were dissolved by aqua regia, hydrobromic acid, and hydrochloric acid step wisely, converting sulfur in the samples into sulfate.

方法采用王水，氢溴酸，浓HCl等试剂将锑样溶解，并使锑样中的硫转化为SO42-，低温加热蒸干，使锑完全挥发。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。