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- Using Chapman rearrangement to prepare 2, 6?dichloro?diphenylamine? 应用Chapman重排制备2,6-二氯二苯胺
- How many dichloro derivatives of anthracene are possible Give their names. 答:蒽有多少种二氯衍生物写出他们的名字.
- METHOD: Using Chapman rearrangement to prepare 2, 6?dichloro?diphenylamine. 方法：应用Chapman重排制备2，6?二氯二苯胺。
- Dibromo neopentyl glycol was prepared from pentaerythritol and hydrobromic acid. 由季戊醇、氢溴酸制备了二溴新戊二醇。
- A bromide based bactericide with 2,2 dibromo 3 nitrilopropionamide as the main agent has been developed. 研制一种以2,2-二溴-3-次氮基丙酰胺为主剂的杀菌剂。
- Polychlorobiphenyls in dye intermediate 2,6 _ dichloro _ 4 _ nitroaniline were analyzed by GC-MS in SIM method. 用气相色谱-质谱联用仪,采用选择离子的方法对染料中间体2,6_二氯_4_硝基苯胺中的多氯联苯进行分析。
- Glycoluril prepared under optimized process conditions has the following good properties of low content of free formaldehyde,durable and stable and crease-proofing. 用优化的工艺条件制备的甘脲树脂，具有游离甲醛含量低、耐久定型、抗折皱的优良性能。
- Two methods for preparing crystallised dintroglycoluril (DINGU) via.recrystallization from nitric acid or nitration of glycoluril in mixed acid of HNO_3-H_2SO_4 were investigated. 介绍了用硝酸重结晶及用硝硫混酸硝化甘脲直接制备二硝基甘脲晶体的方法及用二甲基亚砜制备二硝基甘脲晶体的结果。
- Six series of aryloxy pyridazines derivatives have been synthesized starting from 3,6 dichloro pyradizine. 以3,6-二氯哒嗪为原料,合成了6类芳氧基哒嗪类衍生物,研究了它们的合成方法,并测定了所得产物的除草活性。
- Cross-linking agent glycoluril with a yield of 61.8% had been synthesized b employing urea and glyexal as reactants, and hydrochloric acid as catalysts. 摘要以尿素和乙二醛为原料，在酸催化的条件下合成了甘脲，产率为61.;8%25。
- Our main products are: dibromo propane, allene, methanol, ethanol, benzene, acetylene, potassium bromide, bromine, etc.. 我公司主要生产产品为:二溴丙烷;丙二烯;甲醇;乙醇;苯乙炔;溴化钾;溴素等.
- Dibromo neopentyl glycol, useful as a reacting fire retardent, is suitable to make unsaturated polyester resin, bromine - containing epoxy resin,etc. 二溴新戊二醇作为一种反应型阻燃剂，适用于制造不饱和聚酯树脂、含溴环氧树脂等。
- The results show that glycoluril and HOCB6 are excellent packing materials with wide operational temperature, outstanding thermostability and chromatographic repeatability. 结果表明，甘脲和HOCB6都是良好的气相色谱固定相，热稳定性高，柱性能稳定。
- Cross-linking agent glycoluril with a yield of 61.8% had been synthesized by employing urea and glyexal as reactants,and hydrochloric acid as catalysts. 以尿素和乙二醛为原料;在酸催化的条件下合成了甘脲;产率为61.;8%25。
- The smooth-faced hammer powder paint is prepared by reaction of t et ramethoxy methyl glycoluril (cross linker) with hydroxyl polyester resin at the presence of acid catalyst. 以四甲氧基甲基甘脲为交联剂,在酸催化剂作用下与羟基聚酯树脂等反应制备了“绵绵漆”粉末涂料。
- The yield of dichloro compound is over 78%.The total yield of 2, 6-dichlorotoluene is over 60% and the purity of product is more than 99.0%. 该工艺氯化采用复合催化剂，无需用任何溶剂，二氯化物收率大于78%25,2,6-二氯甲苯总收率可达60%25，纯度大于99%25。
- The yield of dichloro compound is over 78%.The total yield of 2,6-dichlorotoluene is over 60% and the purity of product is more than 99.0%. 该工艺氯化采用复合催化剂,无需用任何溶剂,二氯化物收率大于78%25,2,6-二氯甲苯总收率可达60%25,纯度大于99%25。
- The effect of the solvent on bromination of 6 methoxy 2 acyl naphthalene and 2 methoxyl naphthalene with 1,3 dibromo 5,5 dimethyl hydantoin was studied. 考察了在不同极性溶剂中以 1 ,3 二溴 5,5 二甲基海因作溴化剂对溴化 6 甲氧基 2 酰基萘反应的影响。
- Reactive inorganic polymer-poly(dichloro)phosphazene was prepared through ring-opening polymerization at high temperature. 采用热开环聚合物方法,合成反应性无机聚合物聚(二氯)磷腈。
- Based on the comparison of the various producing processes of 2,6 dibromo benzenamine, an improved process for the synthesis of 2,6 dibromo benzenamine is put forward. 对2,6二溴苯胺的生产工艺路线进行了比较,提出以对氨基苯磺酸为起始原料,经与氢氧化钡成盐,再经溴化,水解,可得2,6二溴苯胺。
