丁烯

2S, 3S -2-methyl -3-benzoxyl butanal was obtained from cis-2-butene and acetaldehyde in 56. 3％ yield through Brown Crotylation, oxidization, etc.

以顺-2-丁烯、乙醛为原料，经Brown Crotylation反应、氧化反应等，得到了（2S，3S）-2-甲基-3-苄氧基丁醛，收率为56.3％。

In order to study strcture-bioactivity relationship concerning α,β-unsaturated-γ-lactones, we further synthesized γ-benzyloxymethy-γ-butanolide XXIII and the corresponding unsaturated buteno- lido XXV Scheme 6, p.

为了研究该类化合物的构效关系，在本论文第三部分，我们进一步设计并合成了--γ-苄氧基甲基-γ-丁内酯XXIII和--γ-苄氧基甲基-γ-丁烯内酯XXV这两个内酯化合物，目的是想考察内酯的α，β-不饱和双键是否是产生细胞毒性的关键结构。

The coupling process of dehydrogenation of 1,4-butanediol and hydrogenation of dimethyl maleate over CuO/SiO2 catalysts to produce one important fine chemical γ-butyrolactone was carried out in a continuous fixed bed reactor under atmospheric pressure.

和传统的反应过程相比，耦合反应提高了顺丁烯二酸二甲酯加氢和1，4-丁二醇脱氢活性。

The emission amount of tail gas in polyisobutylene succinimide production is very large,and the concentration of oil in the recovered chlorhydric acid by absorption is too high to sell.

针对聚异丁烯丁二酰亚胺生产工艺中废气排放量大、尾气吸收得到的盐酸含油量高、难以销售等问题，在分析原因的基础上，对尾气吸收系统进行了技术改进。

Aim To study the relationship between the structures of a series of 4,4-diaryl-3-butenyl derivatives of nipecotic acid and guvacine and their inhibition activity of the γ-aminobutyric aciduptake.

目的研究3-哌啶甲酸和四氢烟酸的4，4-二芳基-3-丁烯衍生物结构和对γ-氨基丁酸摄取抑制活性之间的关系。

Have unit of 6 main production; Produce per year device of device of 130 Kt butadiene styrene rubber, 38 Kt butadiene rubber, 56 Kt and device of extraction of 53 Kt butadiene each one, device of aether of butyl of 40 Kt methylic father's younger brother, 15 Kt 1 - butene device.

现有 6套主要生产装置；年产 130 kt丁苯橡胶装置、 38 kt顺丁橡胶装置、 56 kt和 53 kt丁二烯抽提装置各一套、 40 kt甲基叔丁基醚装置、 15 kt 1－丁烯装置。

Main product has: SBR of butadiene styrene rubber - 1500, SBR - 1502, SBR - 1712, butadiene rubber BR - 9000, BR - 9073 with 6 ＃ solvent naphtha, 120 ＃ industrial aether of butyl of solvent naphtha, methylic father's younger brother, 1 - Ding Xi.

主要产品有：丁苯橡胶 SBR－ 1500、 SBR－ 1502、 SBR－ 1712，顺丁橡胶 BR－ 9000、 BR－ 9073和 6＃溶剂油、 120＃工业用溶剂油、甲基叔丁基醚、 1－丁烯。

Under optimal conditions: reaction temperature 80-90 ℃,V ∶V 4-5 ,linear flowrate of C4 raffinate 0.45-0.55 mm/s, conversion of isobutene can ...

试验结果表明，异丁烯催化逆流水合制叔丁醇的适宜操作条件为：反应温度80~90℃，水油体积比为4~5，抽余C4烃的流速为0.45~0.55mm/s。

An improved process for producing polyisobutylene succinimide used in emulsion explosive was introduced.

介绍了一种经过改进的乳化炸药用聚异丁烯丁二酰亚胺的生产工艺。

A high molecular weight polyisobutenyl succinimide dispersant with high nitrogen content and good thermal and oxidative stabilities was developed.

采用氯化烃化工艺和后偶联反应技术开发了一种氮含量高、热稳定性和氧化稳定性好的高相对分子质量的聚异丁烯基丁二酰亚胺分散剂。

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。