In benzene, re-crystallization products to buff aciculae, commodity to pale yellow.

中重结晶的产品为浅黄色针状晶体，商品为浅黄色或土黄色。

Molecular weight determinations on the purified material were conducted in benzene solutions by cryoscopic method.

用冰点法，液中对纯的物质进行了分子量测定。

Separate the benzene layer with a separatory funnel.

用分液漏斗分出层。

Benzene hexachloride is commonly called BHC .

六化通常称为bhc。

30. Benzene hexachloride is commonly called BHC.

六化通常称为BHC。

The free radical polymerization of VOZO in benzene solution results poly 2 vinyl 2 oxazoline(PVOZO).

对合成过程中的剂及分离等问题进行了讨论。

In this reaction,besides substitution products thiophenol etc,the reduction product benzene is formed.

反应中，除生成笨硫酚等取代产物外，还生成还原产物。

Formaldehyde, benzene, ammonia and radioactive pollution' superscale have seriously affected people's health.

甲醛、、氨气和放射性污染超标经严重影响了人们的健康。

Dichlorofluorobenzene is prepared by diazotizating of 2,4-dichloro aniline and substituting of 2,4-dichloro diazo benzene with fluorinion.

此概述了由2,4-二胺经过重氮化、置换制得2,4-二氟的生产新工艺,产品纯度达到99。

OBJECTIVE To establish a method for detecting benzene series from macro-reticular resin in Peristrophe roxburghiana extraction.

目的检测红丝线提取物中大孔树脂残留物的量。

The common absorption function of benzene and phynol in water on the series of organic soil is studied.

研究了水中和酚系列有机膨润土上的共同吸附作用。

Methyl 1 phenyl Propanone was synthesized with benzene and iso butyryl chloride by using anhydrous aluminium trichloride as catalyst.

由与异丁无水三化铝作催化剂的条件下制备基异丙基酮。

A strain may be defined as an organic compound containing a benzene ring plus a chromophore and auxochrome group.

染料定义为含有环与呈色官能基与辅助成色官能基的化合物。

The transalkylation of polyethylbenzene, mainly diethylbenzene and triethylbenzene, with benzene catalyzed by tungstophosphoric acid has been studied in stirred autoclave.

采用搅拌高压釜,以磷钨酸为催化剂,研究了与多乙的烷基转移反应,多乙主要是二乙和三乙。

The benzene ring and alkene structural group are much more stable than structural group of sulfoacid for the carbonifying process of polystyrene.

碳化过程中，聚乙烯阳离子交换树脂的环结构和烯烃基团比磺酸基团稳定。

The enantioselectivity of N-dodecanoyl-L-proline-3,5-dimethyl-anilide is also good, but the basic line fluctuates strongly due to containing benzene ring in its molecular structure.

虽然用N-十二基-L-脯氨酸-3,5-二甲基胺作添加剂，手性选择性也较好，但由于含有环，紫外吸收增强，基线波动严重。

It was shown that the energy of interaction between the polyoxyethylene and the noncrystalline SiO2 surface was below than hexadecyl accumbent benzene sulfonate.

据此分析，聚氧化乙烯能非晶质SiO2表面形成稳定吸附且部分替换十六烷基对磺酸钠。

This paper has studied the phthalocyanin complex of Cobalt synthesized by benzene bitter wine-urea law,and after depuration,an infrared, ultra-violet spectrograph determination is carried.

文章主要研究了酐-尿素法合成酞菁钴、经提纯并对其进行红外、紫外光谱测定、合成及表征结果表明,红外光谱表征推测结构可靠,紫外光谱分析表明有特征吸收峰之处。

A survey of the health condition of 308 cases of workers exposed to benzene, toluene, xylol and mixed derivatives of benzene is presented.

本文报告了308例、甲、二甲及混合作业工人的健康状况调查结果。

The separation of three-component system of cyclohexane,cyclo-hexene and benzene by extract rectification with a mixed solvent,comprising hexyl dicyanide and dimethyl acetylamine has been studied.

选用己二腈-二甲基乙胺组成的混合剂，对环己烷、环己烯和组成的三元体系进行了萃取精馏。