查询词典 potassium acid carbonate

To be different from the already chloromethylation catalyst, it has a certain amount of moisture wet, which will not produce huge amounts of doughtic cancerogenic chloromethyl methyl ether during and after the reaction.4,4\'-bisbiphenyl, 1,4-bisbenzene, 1,4-bis(chloro- methyl)-2,5-dimethylbenzene, 1,5-bis-2,4-dimethylbenzene, 4-(chlor- omethyl)-1,2-dimethylbenzene, 1,2-bis-4,5-dimethylbenzene, 5,8-bis-1,2,3,4-tetrahydronaphthalene, 3,3\',5-tris-4,4\'-bisbiphenyl and 3,3\', 5,5\'-tetrakis-4,4\'-bisbiphenyl were synth- esized by using this new catalyst. Results indicated that when the reaction temperature was 55～60℃, the reaction time was 12h, the catalyst which consists of the concentration of 80%H_2SO_4, HAc and Lewis acid, the amount of Lewis acid 0.15 mol(nLewis:nbiphenyl=1.5:1), yield of biphenyl chloromethylation product 4,4\'-bis(chrolomethylbiphenyl can reach a maximum 85%.

采用这种催化体系完成了4，4′-二氯甲基联苯、对二氯甲基苯、1，4-二氯甲基-2，5-二甲基苯、1，5-二氯甲基-2，4-二甲基苯、4-氯甲基-1，2-二甲基苯、1，2-二氯甲基-4，5-二甲基苯、5，8-二氯甲基-四氢萘、3，3'，5-三氯甲基-4，4'-二甲基苯和3，3'，5，5'-四氯甲基-4，4'-二甲基苯的合成，结果表明：在反应条件为：反应温度55～60℃，反应时间12h，选择80%H_2SO_4、冰醋酸和Lewis酸为催化剂，反应最佳反应Lewis酸用量是0.15mol(和原料比为1.5：1)，反应效果最好，联苯氯甲基化产物(4，4′-二氯甲基联苯)收率为85%；在反应条件为：反应温度70℃，反应时间8h，80%H_2SO_4、冰醋酸和Lewis酸为催化剂，反应最佳反应Lewis酸用量是0.1mol(和原料比为1：1)时，反应效果最好，苯的氯甲基化产物收(来源：ABd0C论文eded网www.abclunwen.com)率为75%；在反应条件为：在反应条件为：反应温度40℃，反应时间10h，60%H_2SO_4和Lewis酸为催化剂，反应最佳反应Lewis酸用量是0.1mol(和原料比为1：1)时，反应效果最好，对二甲苯氯甲基化产物(1，4-二氯甲基-2，5-二甲基苯)收率为78.5%；在反应条件为：反应温度35℃，反应时间10h，60%H_2SO_4、冰醋酸和Lewis酸为催化剂，反应最佳反应Lewis酸用量是0.1mol(和原料比为1：1)时，反应效果最好，间二甲苯氯甲基化产物(1，5-二氯甲基-2，4-二甲基苯)收率为81.5%。

First, combined with the corrosion mechanism of carbon steel in chlorhydric acid, the relation between inhibition efficiency and molecular structure of inhibition of carbon steel in chlorhydric acid by benzene nitriles are developed in terms of Hansch Relation.

最后，运用灰色理论，通过建立苯腈类化合物在盐酸溶液中对碳钢缓蚀的缓蚀性能与分子结构关系的灰色缓蚀模型，研究了苯腈类化合物在盐酸溶液中对碳钢缓蚀的缓蚀性能与分子结构的关系。

At last, the relations between inhibition efficiency and molecular structure of inhibition of carbon steel in chlorhydric acid by benzene nitriles are studied by constructing the grey inhibition model of the relations between inhibition efficiency and molecular structure of inhibition of carbon steel in chlorhydric acid by benzene nitriles.

通过对2—苯基丁腈缓蚀性能的理论预测和试验验证，认为利用某一类苯腈类化合物的缓蚀性能与分子结构关系，从理论上预测同类型苯腈类化合物的缓蚀性能是可能和合理的。灰色理论研究结果表明，苯腈类化合物在盐酸溶液中对碳钢缓蚀的缓蚀性能与分子结构参数的关系，可用GM（0，3）模型描述。

We extract the lipid with hexane and then compare the removing effect of 20% trichoroacetic acid and 2.0mol/L chlorhydric acid after having condensed the extract.

将提取液浓缩后，利用正己烷萃取提取液中的脂溶性物质，然后分别测定在浓缩物中加入不同体积的20％的三氯乙酸及2mol／L的盐酸的除蛋白效果，结果显示盐酸为较佳的除蛋白试剂。

A new defluorination idea is presented. During the process of producing phosphoric acid with chlorhydric acid and phosphate rock, the extraction reaction of the phosphate rock is accompanied with the defluorination reaction. Feed-grade calcium hydrogen phosphate according with international standard can be made by filter and neutralization without any deflourination agent.

采用全新的脱氟理念，在使用盐酸与磷矿制取磷酸的过程中，磷矿的浸取反应与除氟反应同步进行，在不添加任何除氟剂的条件下，浸取液经过过滤，中和，就可以制出符合国标要求的饲料级磷酸氢钙。

The technology process was conveniently operated, with the acid -leaching solution as raw material from the producing of gelatin, the animal bones were fully utilized and the problem to handle the waste Chlorhydric acid was solved.

本工艺流程简单，由于利用了明胶生产中的酸浸液为原料制备食品级磷酸氢钙，因而兽骨得到了充分利用，且解决了明胶生产过程中废酸的处理问题。

It has been identified whether chlorhydric acid or baicalin not. Chlorhydric acid and baicalin of preparation exist or not in by Tlc-scanning Method. This detective index could be used to control the quality of Shuanghuanglian Oral Liquid preparation. To determine the content of chlorphenamine maleate and baicalin by HPLC and UV-2000 and regulate the minimum limit as the control of preparation quality, in order to insure clinical management rationality, safety and usefulness.

通过薄层色谱鉴别口服液制剂中金银花、黄芩等药味的存在，并且金银花、黄芩分别以绿原酸、黄芩苷为考察指标，并采用HPLC、UV-2000测定金银花、黄芩进行含量测定，规定其下限作为制剂的质量控制指标，以保证临床用药的合理性、安全性和有效性。

ABSTRACT Inhibition mechanism and the relations between inhibition efficiency and molecular structure of inhibition of carbon steel in chlorhydric acid by benzene nitriles whose inhibition is caused by chemical adsorption and quaternary ammonium salts whose inhibition is caused by physical adsorption are mainly studied from microscope through quantum chemistry calculation, and the relations between inhibition efficiency and molecular structure of inhibition of carbon steel in chlorhydric acid by benzene nitriles are studied by making use of model-constructing thought of grey theory in this paper.

本文主要通过量子化学计算，从微观角度研究了化学吸附型缓蚀剂苯腈类化合物和物理吸附型缓蚀剂季铵盐在盐酸溶液中对碳钢缓蚀的缓蚀机理和缓蚀性能与分子结构的关系；并运用灰色理论建模思想，研究了苯腈类化合物在盐酸溶液中对碳钢缓蚀的缓蚀性能与分子结构的关系。其中，通过量子化学计算，从微观角度研究物理吸附型缓蚀剂在盐酸溶液中对碳钢缓蚀的缓蚀机理和缓蚀性能与分子结构的关系，是在尝试着进行；而运用灰色理论建模思想，研究缓蚀剂缓蚀性能与分子结构的关系，是一项具有尝试性和开拓性的工作。

In the recent years, the company has developed series of the down-stream derivatives of P/O-Chlorotoluene, i.e. 3,000 t/a O- Chlorobenzaldehyde and O-Chlorobenzyl Chloride, 3,000 t/a P- Chlorobenzaldehyde and P-Chlorobenzyl Chloride, 1,500 t/a 2.4- Di chlorotoluene etc. In addition, there is the by-product of 30,000t/a of chlorhydric acid (31-33%). In 2008, the company invested 80 mln yuan, to build the project with 25,000t/a of Maleic Acid by adopting the up-to-date in China technology, thus to improve the product range to a greater extent, and hence to sharpen its competitive edge.

近年来又发展了对、邻氯甲苯的下游衍生系列产品：3000t/a邻氯苯甲醛、邻氯氯苄，3000t/a对氯苯甲醛、对氯氯苄，1500t/a2，4－二氯甲苯等，另有副产盐酸（31～33％）30000t/a.2008年，公司投资8000万元，采用国内最先进的技术建成了25000t/a顺丁烯二酸酐项目，大大改善了公司的产品结构，提高了企业的竞争能力。

White powder, toxic, sweet, specific density 7.10, insoluble in water, soluble in nitric acid, soluble in chlorhydric acid, ammonium acetate and sodium acetate when heated.

白色粉末，味甜、有毒，比重7.10。不溶于水，溶于硝酸、热溶盐酸、醋酸铵和醋酸纳溶液中，可部分溶于醋酸中。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"