二酸的

There are many reports related to the synthesis of azelaic acid, such as oxidation of oleate with nitric acid or ozone (9); oxidation of castor oil with potassium permanganate (10), as well as some other synthetic methods using 1, 9-nonadialdehyde〔11〕or 1,5-cyclooctadiene 〔12〕as the materials.

有关壬二酸合成的研究报道很多，例如用硝酸或臭氧氧化油酸〔9〕；高锰酸钾氧化蓖麻油〔10〕以及以1，9-壬二醛〔11〕、1，5-环辛二烯为原料〔12〕等方法制得。

One of the reaction products in the solid state reaction between silver behenate and phthalic acid — di-silver phthalate (Ag2PA) was prepared by liquid deposition method, and was characterized with elemental analysis, ICP-AES and FT-IR.

采用液相沉淀法合成了山嵛酸银与邻苯二甲酸的固相反应产物邻苯二甲酸二银，并通过元素分析、ICP-AES、FT-IR等方法对其进行了表征分析。

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。

Leaves was 0.11%. 11 compounds were separated and identified, which accounted for 100% of the essential oil of the skins. The main chemical components of the essential oil were 3, 7, 11-trimethyl-, 1, 6, 10-Dodecatrien-3-ol (46.03%),-Globulol (8.39%), adipic acid, dioctyl ester (7.03%), Ledol (7.00%), Copaene (5.86%), etc. ConclusionThe essential oil of leaf of Horsfieldia hainanensis Merr.

结果水蒸气蒸馏提取物得率为0.11%，通过计算机检索、图谱分析鉴定出11个化合物，占总油量的100%，其主要成分为3，7，11-三甲基l-1，6，10-十二碳三烯-3-醇(46.03%)、-蓝桉醇(8.39%)、己二酸二辛酯(7.03%)、喇叭茶醇(7.00%)、胡椒烯(5.86%)等。

Firstly, 3-ethylthiobutanal was prepared from crotonaldehyde reacting with ethanehiol in triethylamine with high yield. Secondly, methyl acetoacetate was converted to 6-ethylthiohept-3-en-2-one by three steps via hydrolysis, condensation with 3-ethyltio-butanal and dehydration, then 6-ethylthiohept-3-en-2-one was cycloco ndensed with dimethyl malonate by Michael addition and Claisen condensation, followed by saponification and decarboxylation to give the intermediate of 5-(2-ethylthiopropyl)-cyclohexane-1,3-dione.

首先，以巴豆醛与乙硫醇为原料，在三乙胺的催化作用下高收率制得3-乙硫基丁醛；然后从乙酰乙酸甲酯出发，通过碱水解、与3-乙硫基丁醛缩合、脱水三步反应合成6-乙硫基-3-烯-2-庚酮，接着6-乙硫基-3-烯-2-庚酮与丙二酸二甲酯通过Michael加成和Claisen缩合成环，再通过皂化和脱羧反应生成中间体5-[2-丙基]-1，3-环己二酮；再与丙酸酐反应丙酰化，最后与0-3-氯-2-丙烯基羟胺肟化，得到目标化合物烯草酮。

In this paper, kinetics and mechanism of oxidation of dihydric alcohols、 ethylene glycol monoethyl ether 、 amino acids by Ag in alkaline medium were studied by spectrophotometry.

本文用分光光度法研究了在碱性介质中，二羟基二合银配离子氧化二元醇、乙二醇独乙醚和天冬氨酸的反应动力学及机理。

A key intermediate of abacavir, named N-(2-amino-4,6-dichloro-5-pyrimidinyl) formamide was synthesized from diethyl malonate and guanidine hydrochloride. This method suits to industry for large scale. The materials are easy to get and very cheap.

2-氨基-4，6-二氯-5-甲酰氨基嘧啶是合成阿巴卡韦的关键中间体，本文拟以丙二酸二乙酯和盐酸胍为起始原料合成这一关键中间体，具有原料来源广，适合大规模生产等优点。

The electrolyte, which is different from the conventional electrolyte of the ethylene-boric acid system, consists of ethylene, dimethylformamide, ammonium hexandioic and polyhydric alcohol but water.

它是以乙二醇和二甲基甲酰胺为主溶剂，以己二酸铵为溶质，以多元醇为热稳定剂的非水系工作电解液。本文对新型工作电解液和一般工作电解液进行了比较。

Changle Yili Chemical Co., Ltd. is a high-tech Private enterprise, which mainly produces fine chemical products. The main products are environmental solvent with high-boiling point-composite Dimethyl Blatomic Acid(Dubang company call the same kind product as DBE), DBE-IB, DMA, TEC.The company covers an area of 40 acres.

昌乐屹立化工有限公司是以生产精细化工产品为主的高科技民营企业，主导产品为环保型高沸点溶剂－混合型二元酸二甲酯（杜邦公司称同类产品为DBE），环保型高效成膜助剂，己二酸二甲酯柠檬酸三乙酯。

Firstly, we should prepare polyester glycol in order to prepare water-borne polyurethane emulsion used to wooden furniture. Polyester glycols having designed molecular weight of 1000 are synthesized by ethylene glycol and mixture of phthalic anhydride and adipic acid (morl radio =40:60)on condition that molar excess content of glycol is 15%, and high vacuum time is 8h.The produced polyester glycols having the same molecular weight as designed measure up to standard of material. And Water-borne polyurethane emulsion's hardness is better than others are produced by aliphatic polyester glycol.

为了制得性能优越木器用水性聚氨酯乳液，首先我们从制备水性聚氨酯用的原料聚酯二元醇入手，我们设计了分子量为1000的聚酯二元醇，它使用邻苯二甲酸酐和己二酸以摩尔比40：60混合后再与乙二醇反应，反应时醇的摩尔过量15%，真空时间8小时，所得的聚酯二元醇，在此条件下酸值基本上能符合用作聚氨酯原料的要求，所测得的分子量也与设计的分子量非常接近，且用它来制得的水性聚氨酯乳液，其涂膜硬度，相对于单独用脂肪族聚酯二元醇制备的水性聚氨酯的要优。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。