乙酸

Sodium cyclohexanoloxyacetate was synthesized by 1mol︰1.15mol of cyclohexyl sodium alcoholate to sodium chloroacetate at 135145℃.The reaction time was 2.5h and the yield was about 81%.The sodium cyclohexanoloxyacetate was acidified by HCl to get the intermediate product,2-cyclohexanoloxyacetic acid.

以摩尔比为1︰1.15的环己醇钠和氯乙酸钠为原料，在135145℃下反应合成了环己氧基乙酸钠，反应时间为2.5h，收率约为81%，再将环己氧基乙酸钠用盐酸酸化制得中间体环己氧基乙酸。

It is existed competitiveness inhibition of 6APA, non-competitiveness inhibition of PAA and substrate inhibition of Penicillin on the hydrolysis of benzylpenicillin to 6APA and PAA by an immobilized penicillin amidase. The heat conductive coefficients were determined on the vacuum elevation liquid membrane concentration. The thermodynamics and kinetics of PAA extraction were studied on the organic solvent extraction of the above solution.

研究证明固定化青霉素酰化酶裂解反应是典型的底物、产物抑制酶反应，其反应动力学数据表明，青霉素、苯乙酸以及6APA对反应分别存在底物抑制、非竞争性抑制和竞争性抑制；真空升膜浓缩适应热敏性以及粘度不大的物系，对于6APA水溶液的真空升膜浓缩过程研究得到了浓缩实验的传热系数；浓缩液萃取主要是提取出其中的苯乙酸，本文测定了不同温度以及溶剂条件下的苯乙酸溶解度，并观测了苯乙酸萃取动力学。

The components of higher relative content in wines were ethyl acetate, butanoic acid methylester, acetic acid isobutylester, butyric acid ethylester, isobutylalcohol, isopentylacohol acetate, isopentylalcohol, acetic acid hexylester, hexylalcohol, ethyl caprylate, decanoic acid ethylester, acetic acid phenethylester, lauric acid ethylester, benzeneethanol, octanoic acid,decanoic acid and hexanoic acid ethyl ester.

猕猴桃酒样中乙酸乙酯，丁酸甲酯，丁酸异丁酯，丁酸乙酯，异丁醇，乙酸异戊酯，异戊醇，乙酸己酯，己醇，辛酸乙酯，癸酸乙酯，乙酸苯乙酯，月桂酸乙酯，苯乙醇，辛酸，癸酸，己酸乙酯等相对含量较高。

Uranium solution is obtained electrolytically by reducing uranyl ion on mercury cathode. The effect of the addition of various aminopolycarboxylic acids (such as EDTA, DTPA, CyDTA and TTHA) and organic water-miscible solvents (such as CH3OH, C2H5OH and CH3COCH3) on the stability of ura-nium in air has been investigated. The absorption spectra of uraniumand uraniumin 1 mol/l and 9mol/l hydrochloric acid solutions are examined.

本文采用汞阴极电解还原法制备了铀溶液，研究了在盐酸介质中各种氨羧络合剂乙二胺四乙酸二钠、二乙三胺五乙酸、1，2-环已烷二胺四乙酸、三乙基四胺六乙酸和水溶性有机溶剂甲醇、乙醇和丙酮的存在对铀稳定性影响，测定了在不同盐酸浓度中铀和铀的吸收光谱。

N-methylacetamide was used as entrainer in separating acetic acid from water with extractive distillation ,and the interaction mechanism in this process was studied by using the density functional theory.

文献[1-4]认为萃取精馏分离乙酸水溶液过程中萃取剂与乙酸之间的氢键作用改变了溶液中乙酸和水的活度系数关系，从而改变了两者之间的相对挥发度，使得水和乙酸的分离变得相对容易。

Products: 3 - benzoyl-ethyl acrylate (97% min), acyl phosphorus acid methyl ester (98% min), P acyl three ethyl acetate (98% min), a phosphorus acid acyl The ethyl esters (98% min), 3 - bromine -1,3,4,5 - tetrahydrocannabinol -2 H-1-benzo-Aza Zhuo -2, 1 - naphthalene-tetrahydrocannabinol (98% min), 3,5 - dimethyl benzoyl chloride (99% min), 3,5 - dichloro benzoyl chloride (97% min), the ethyl benzoyl chloride (99% min), a TCA Ester (99.5% min), o-benzoyl methyl benzene (99% min), 4 - phenyl benzophenone (99% min): glacial acetic acid (99% min), methanol (99% min), liquid chlorine (99.5% min), caustic soda (30% min), isopropyl alcohol (99% min), anthranilic acid (99% min), dichloroethane (99% min ), Chunben (99% min), toluene 99% min

3-苯甲酰基丙烯酸乙酯（97%min）、磷酰基乙酸三甲酯（98%min）、磷酰基乙酸三乙酯（98%min）、磷酰基乙酸甲酯二乙酯（98%min）、3-溴-1，3，4，5-四氢-2H-1-苯并氮杂卓-2酮、1-四氢萘酮（98%min）、3，5-二甲基苯甲酰氯（99%min）、3，5-二氯苯甲酰氯（97%min）、对乙基苯甲酰氯（99%min）、氯乙酸甲酯（99.5%min）、邻苯甲酰基苯甲酸甲酯（99%min）、4-苯基二苯甲酮

Sodium 2-Acrylarnido-Acetate has been synthesized through the reaction of Aminoacetic acid with acryloyl chlorine, then Copolymer of sodium 2-acrylamido-acetate and dimethyl diallyl ammonium chloride with acrylamide had been prepared by free radical polymerization using (NH4)2S2O8 and NaHSO3 as the free radical initiator in water solution.

本论文首先以氨基乙酸和丙烯酰氯为原料制备丙烯酰胺基乙酸钠单体，然后以丙烯院胺丙烯酰胺基乙酸钠和二甲基二烯丙基氯化铵为单体，(NH4)2S2O8和NaHSO3为自由基引发剂，采用水溶液聚合法合成丙烯酰胺／丙烯既胺基乙酸钠／二甲基二烯丙基氯化铵共聚物。

Aroma components of Hexylalcohol,Benzeneethanol,Butylalcohol,Pentylalcohol, ethyl acetate, Lactic acid ethylester, Butanedioic acid,diethylester, isopentylacohol acetate, acetic acid hexylester, acetic acid phenethylester, hexanoic acid ethylester, ethyl caprylate, decanoic acid ethylester, octanoic acid, linalool andα-terpineol were identified in former kiwi wine reports.

本试验首次在猕猴桃酒中发现了油酸乙酯，棕榈酸乙酯，9-癸烯酸，肉豆蔻酸乙酯，月桂酸乙酯，香茅醇，法呢醇，异薄荷酮香气物质，目前国内外资料中报道的猕猴桃酒香气物质—己醇，苯乙醇，丁醇，戊醇，乙酸乙酯，乳酸乙酯，琥珀酸二乙酯，乙酸异戊酯，乙酸己酯，乙酸苯乙酯，己酸乙酯，辛酸乙酯，癸酸乙酯，辛酸，芳樟醇，α-松油醇等均在本试验研究中也检测出，并得到证实。

Up to day, the batch process of producing chloroacetic acid is still extensively used in our country, by which byproduct dichloroacetic acid comes out while chloroacetic acid beingproduced.

控制反应体系中氯乙酸含量不超过30%，最终所得产品氯乙酸含量达98.5%，二氯乙酸含量小于0.5%，以目前实验装置24小时可得氯乙酸2.938kg。

Results showed that extraction abilities depends on the hydrophobic of solutes which pK〓 values are similar, e. g. acetic, propionic, butyric and valeric acids, while pK〓 values affect dominantly the extraction abilities of acids with similar hydrophobic, e. g. formic, acetic, chloroacetic, dichloroacetic, and trichloroacetic acids. Meanwhile, diluents and TOA concentration also affect the extraction equilibria of acids through the specific basicity of TOA .

TOA对酸性差别很小的一元羧酸如乙酸、丙酸、丁酸、戊酸的萃取能力主要取决于羧酸的疏水性参数logP；TOA对疏水性参数差别较小的羧酸如甲酸、乙酸、一氯乙酸、二氯乙酸、三氯乙酸的萃取能力主要取决于羧酸的电性参数；稀释剂的种类、TOA的浓度都会影响TOA的表观碱度pH〓，并通过TOA的表观碱度影响羧酸的萃取平衡。

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。