三钠的

After esterification, the ethyl-2-chloro-3-phenylpropionate reacts with diethyl malonate under the catalysis of sodium ethylate, and we obtain the corresponding triethyl ester. The-benzylsuccinic acid is formed by the triethyl ester reacting with concentrate hydrochloric acid and taking place hydrolyzation and decarboxylation reaction at the same time. In order to avoid the formation of cinnamic acid, the sodium ethylate and diethyl malonate must be react sufficiently. The course has simple operation, inexpensive materials and better yield.

具体制备工艺为：首先以L-苯丙氨酸为原料采用重氮化方法得到-2-氯-3-苯基丙酸，再经酯化得到-2-氯-3-苯基丙酸乙酯后在乙醇钠催化作用下和丙二酸二乙酯缩合，发生SN2反应，得到相应的三乙酯，然后经水解和脱羧，得到-苄基丁二酸；在实验中乙醇钠要和丙二酸二乙酯充分反应，避免生成肉桂酸乙酯；该过程操作简单，原料便宜，产率较高，总收率可达到26.8%。

The effects of solvents and salts on the formation of a third liquid phase, distribution of catalyst, reaction mechanism and reaction rate in the reaction between n-butyl bromide and sodium phenolate with tetrabutylammonium bromide as a phase transfer catalyst were investigated.

中文摘要本文系针对以溴化四丁基铵为相间转移触媒催化正溴丁烷与酚化钠之反应，研究溶剂种类及盐类与碱类之添加量对形成第三液相、触媒分布、反应机构及反应速率之影响，被测试之溶剂包括氯苯、甲苯与正己烷，而在盐类与碱类效应的研究中，则测试溴化钠与氢氧化钠。

Third, the project description: sodium chlorate mainly used for the production of chlorine dioxide and other preparation of perchlorate, perchlorate and pesticides, pharmaceuticals, printing and dyeing, and so the chemical industry, proposed an annual output of 50,000 tons sodium chlorate project , the project completed, it can be realized in sales of 300 million yuan.

三、项目简介：氯酸钠主要用于二氧化氯的生产及制取其他亚氯酸盐、高氯酸盐及农药、医药、印染等化工行业，拟建年产5万吨氯酸钠项目，项目建成后，年可实现销售收入3亿元。

Al impurity, the floatabilities of hematite and aegirine were resemble, which is contributed to the existence of structrual iron ion on surfaces of both minerals. It is the structrual iron ion that accelerates the floatability of aegirine greatly and leads to difficult separation with hematite. 2. The basic mechanism of actions of fluorosilicate salts as selective depressants of aegirine during the direct flotation of hematite was investaged detaily by using FTIR and XPS spectrocppy, fluorosilicate salts are poor depressants for hematite, but are very strong depressants for iron-containing silicate such as aegrine in weakly acid medium, which can enlarge the flotation differences between two minerals.

运用X射线衍射、俄歇能谱等测试手段研究了赤铁矿与钠辉石纯矿物的晶体结构特征，表面破裂面的元素组成与赋存状态，发现在白云鄂博不同的矿床（氧化矿段，原生矿段，风化矿段）存在着三种颜色与可浮性均有所差别的钠辉石，其可浮性的差异主要是由于表面含铁量及Ca、Al等杂质含量的不同而引起的，结构Fe〓的存在导致钠辉石可浮性剧增从而与赤铁矿难以分离。

The company has two production¨×biopsy device, the three modified PTT and PTT fibers,¨×fiber production line, a set of three monomers (isophthalic acid, 5 - sodium) production unit, a four-monomer production line with annual production of 15,000 tons slice¨×composite and PTT fibers, staple¨×compound, PTT modified fiber 15,000 tons and 1,000 tons of the four monomers, three monomers 1200 tons, brominated flame retardants EPS with the capacity of 3000 tons .

公司拥有两套波斯伦切片生产装置，三条PTT及改性PTT纤维、波斯伦纤维生产线，一套三单体（间苯二甲酸，5-磺酸钠）生产装置，一套四单体生产线，具有年生产波斯伦复合切片15000吨和PTT纤维、波斯伦复合短纤、PTT改性纤维15000吨及四单体1000吨，三单体1200吨、溴系EPS用阻燃剂3000吨的能力。

In groups B1, B2 and B3 , after 10 minutes of injecting the additional dose of pentobarbital sodium, pentoxifyllinel in doses of 60mg/kg, 30mg/kg and 15mg/kg were injected respectively. In group C, 125mg/kg of nikethamide was injected after 10 minutes of injecting the additional dose of pentobarbital sodium.

在B1、B2、B3 三组家兔，于再注戊巴比妥钠后(即加注15 mg/kg戊巴比妥钠后)10 分钟，按等比级数分别注射60mg/kg、30mg/kg、15mg/kg 剂量的己酮可可碱；在C 组家兔则注射尼可刹米125 mg/kg 作阳性对照药物。

The results from the experiment are: the amount of all micro-powders that grain sizes are less 0.044 mm should be less than 35% in weight, and the value of coarse q and attenuate q should be respectively 0.23 and 0.32, and the additive amount of active a-alumina and calcium alumina cement should be respectively 7% and 4% in weight, meanwhile, the best dispersant is PMAA-NH4 in the non-microsilica system; while the value of two q should be respectively 0.21 and 0.29, the amount of active a-alumina, microsilica and calcium alumina cement should be respectively 6%, 2% and 4% in weight, the best dispersants are sodium hexamer taphosphate and Na2P3Oio in the microsilica system.

依照上述实验方法得出刚玉自流浇注料所必备的条件：刚玉自流浇注料中的细粉(-0.044mm)总量应小于35％；在无硅微粉系统中的Andreassen公式的粗端q值和细端q值分别为0.23和0.32，氧化铝微粉、水泥的最佳加入量是7％、4％，且所使用的分散剂为改性聚丙烯酸钠最好，而在含硅微粉系统中的Andreassen公式的粗端q值和细端q值分别为0.21和0.29，氧化铝微粉、硅微粉和水泥的最佳加入量为6％、2％和4％，最好合用三聚磷酸钠和六偏磷酸钠作为分散剂。

The methyl pheophorbide-a (5) was oxidized with osmium oxide and sodium periodate to give chlorin 8 which was converted into aldehyde purpure-18 (9) and purpure-7 trimethyl ester (10) by air-oxidation in butanol in the presence of sodium.

选用四氧化锇和高碘酸钠将5氧化成卟吩醛(8)，在丁醇中以丁醇钠作催化剂， 8的氧化和重排反应给出3-甲酰基紫红素-18酯(9)和紫红素-7三甲酯衍生物10。

The heaxamethylene-diamine, 2-chloroethylene-sulfonate, fatty acid and Phosphorus trichloride are used as raw materials and a series of Gemini products are synthesized.

并以己二胺、2-氯乙基磺酸钠、脂肪酸和三氯化磷等为原料合成了一系列的双酰胺双磺酸盐表面活性剂N，N＇-双脂肪酰基己二胺二乙基磺酸钠。

Methods of test for orthoboric acid, diboron trioxide, disodium tetraborates, sodium perborates and crude sodium borates for industrial use - Determination of iron soluble i

工业用原硼酸、三氧化二硼、四硼酸二钠、高硼酸钠和粗硼砂的试验方法。溶于粗硼砂中碱性介质

What would he tell Judith and the children?

他将怎样告诉朱迪丝和孩子们呢？

I this is at that time, the opinion with peacockish true girl is full of in a heart.

这就是当时的我，一个心中布满虚荣的女孩子真实的想法。