异丁

EH detected in Lanzhou reach of the Yellow River included naphthalene, phenanthrene, DBP, DEHP and benzothiazole and the detection rates of the five EH were 40%, 60%, 100%, 100% and 20% respectively.

结果 共定性检出有机类环境激素10种，即邻苯二甲酸二异丁酯、邻苯二甲酸正丁酯、邻苯二甲酸二（2-乙基己基）酯、邻苯二甲酸丁酯、邻苯二甲酸异辛基酯、邻苯二甲酸丁环己酯、苯并噻唑、萘、菲、苯并异噻唑。C断面检出的环境激素浓度最高，菲、DBP、DEHP浓度分别高达0.320、13.89、109.93μg/L.A断面次之，B断面检出的环境激素浓度与A断面相比有所下降，E断面检出的环境激素与其他断面相比，浓度相对较低，D断面所检出的环境激素与C断面比较，有一定下降，但下降不明显。

The results indicated that both binary interactive parameters of water/isobutanol system from this work and the parameters of water/ethanol from literature can be used to precdict the liquid-liquid equilibria of water/ethanol/isobutanol. But the parameters of ethanol/isobutanol from the literature were not appropriate for the prediction. Furthermore, the model parameters from 30℃ can can be used to predict the liquid-liquid equilibria under 35 ℃. The model parameters of water/isobutanol are independent on the temperatures, so constant parameters irrelative to temperature can meet prediction accuracy. Othmer-Tobias/Bancroft equation was also used to fit the liquid-liquid data of water/ethanol/isobutanol system, but it didnt possess the performance of predicting the liquid-liquid equilibria.The partition coefficients of dipotassium glycyrrhizinat were determined in the liquid-liquid two-phase system of water/ethanol/isobutanol and corrected by experiential equation.

结果表明：由本文的二元液液相平衡实验数据关联得到的水+异丁醇体系的相互作用参数和文献上由二元气液相平衡数据关联得到的水+乙醇体系的相互作用参数都具有预测三元液液相平衡关系的能力，而文献上由二元气液相平衡数据关联得到的乙醇+异丁醇体系的相互作用参数不具有预测三元液液相平衡关系的能力；可以用从30℃三元液液相平衡数据关联回归得到的模型参数来预测35℃时的液液相平衡关系；水+异丁醇的相互作用参数与温度关系不是很密切，计算时取与温度无关的常数即能满足关联精度要求；Othmer-Tobias和Bancroft经验方程可用于水+乙醇+异丁醇两相体系的液液相平衡关系的关联计算，但这类经验方法并不具有预测能力。

Our company is mainly engaged in chemical raw materials trading, the company mainly engaged in: toluene, xylene, mesitylene, durene, 6 # 120 # 200 # solvent, ethyl acetate, butyl acetate, acetone, butanone, cyclohexanone, isophorone, MIBK, isopropyl alcohol, isobutyl alcohol, butanol, mixed alcohols, methanol, ethanol, ethylene glycol, diethylene glycol, diacetone alcohol, Anti-White Water, CAC, n-hexane, dichloromethane, trichloro-B, DMF, 5 # 10 # 15 # white mineral oil, lubricating oil, sewing machine oil, as well as high-pressure polyethylene, linear polyethylene, low-pressure polyethylene, polypropylene, rubber and other chemical raw materials.

我公司主要从事化工原料贸易，公司主要经营：甲苯、二甲苯、三甲苯、四甲苯、6# 120# 200#溶剂、醋酸乙酯、醋酸丁酯、丙酮、丁酮、环已酮、异佛尔酮、MIBK、异丙醇、异丁醇、正丁醇、混丙醇、甲醇、乙醇、乙二醇、二甘醇、二丙酮醇、防白水、CAC、正已烷、二氯甲烷、三氯乙、DMF、5# 10# 15#白矿油、润滑油、针车油以及高压聚乙烯、线性聚乙烯、低压聚乙烯、聚丙烯、橡胶等各种化工原料。

With LaCl_3·7H_2O as catalyst to replace conventional liquid inorganic acid,and the esterificationbetween isobutyric acidand n-butyl alcohol as a probe reaction,the optimum conditions were investigated and various isobutyrate s were synthesized over it in this paper.

7H2O替代传统液体无机酸为催化剂，以合成异丁酸正丁酯为探针反应考察催化酯化反应的优化条件，并在此条件下合成了多种异丁酸酯，比较了不同催化剂对催化合成异丁酸正丁酯的影响。

Jinzhou Chemical landing six branches now have the world's larger 5,000 tons / year, Central Sulfolane a plant to produce 1,500 tons mainly isopropylamine / devices in a production, domestic production of methyl iso unique ---A, two isobutyl ketone and methyl isobutyl ketone methanol mainly 1,500 tons / year of a production plant.

锦州六陆化工分公司目前拥有世界上较大的5000吨/年环丁砜生产装置一套、以生产异丙胺为主1500吨/年生产装置一套、国内独有以生产甲基异丁基酮甲酮、二异丁基酮和甲基异丁基酮甲醇为主1500吨/年生产装置一套。

The catalytic transformation pathway can change to decrease the yield of hydrogen and yield methyl-contained sulfides such as methyl mercaptan, dimethyl sulfide and dimethyl disulfide, but overlarge concentration of methanol would holdback the transformation of isobutyl mercaptan. The transformation of isobutyl mercaptan was favorable if the volume ratio of methanol and benzene was 0.2.The addition of methanol assume certain effect on the catalytic cracking of di-n-butyl sulfide in solvent benzene but without changing the cracking reaction mechanism of di-n-butyl sulfide.

甲醇也可以使异丁硫醇的催化转化路径发生改变降低硫化氢的产率，生成甲硫醇、甲硫醚及二甲基二硫化物等含甲基硫化物，但甲醇的浓度过高会抑制异丁硫醇的转化，在反应体系中当甲醇的体积占到溶剂苯体积的20%时对异丁硫醇的转化较为有利；甲醇的添加对丁硫醚在溶剂苯中的催化裂化有一定影响，但没有改变丁硫醚的裂解反应历程。

When there were two kinds of active sites with different properties, isobutene were formed on one kind of active site, and then, spilled over to the other active sites, reacting to MAL, isobutene forming as the final product was restrained, and the oxygenates yield was increased.

当催化剂表面存在相邻的两种化学性质不同活性位时，异丁烷在一种活性位上生成异丁烯后，异丁烯可能在催化剂表面迁移到另一种活性位上，继续反应生成甲基丙烯醛或甲基丙烯酸，这抑制了异丁烯作为产物从反应器中流出，并提高含氧有机物收率。

As raw chemical materials, produce acetone, hydrogen peroxide, methyl isobutyl ketone, isobutyl ketone, 2-Propanol, diisopropyl ether and isopropyl alcohol ether, isopropyl chloride, isopropyl and fatty acids and fatty acid chloride as isopropyl.

作为化工原料，可生产丙酮、过氧化氢、甲基异丁基酮、二异丁基酮、异丙胺、异丙醚、异丙醇醚、异丙基氯化物，以及脂肪酸异丙酯和氯代脂肪酸异丙酯等。

This year the company operating the various organic chemical raw materials, varieties are: methanol, ethanol, ethylene glycol, butanol, isobutanol, isopropanol, glacial acetic acid, vinyl acetate, B lipid, Ding acetic acid lipid, styrene, toluene, phthalic anhydride, xylene, acetone, butanone, cyclohexanone, DMF, sulphuric acid, methyl isobutyl ketone, glycol Dingmi, three toluene, 2 Xin fat, melamine.

本公司常年经营各种有机化工原料，品种有：甲醇、乙醇、乙二醇、正丁醇、异丁醇、异丙醇、冰醋酸、醋酸乙烯、醋酸乙脂、醋酸丁脂、苯乙烯、甲苯、苯酐、二甲苯、丙酮、丁酮、环己酮、DMF、硫酸、甲基异丁基酮、乙二醇丁醚、三甲苯、二辛脂、三聚氰胺。

The company operating a variety of perennial organic chemical raw materials, varieties include: methanol, ethanol, ethylene glycol, n-butyl alcohol, isobutyl alcohol, isopropyl alcohol, acetic acid, vinyl acetate, acetic acid acetate, acetic acid Ding resin, styrene, toluene , phthalic anhydride, xylene, acetone, butanone, cyclohexanone, DMF, sulfuric acid, methyl isobutyl ketone, glycol ether, mesitylene, octyl resin, melamine.

本公司常年经营各种有机化工原料，品种有：甲醇、乙醇、乙二醇、正丁醇、异丁醇、异丙醇、冰醋酸、醋酸乙烯、醋酸乙脂、醋酸丁脂、苯乙烯、甲苯、苯酐、二甲苯、丙酮、丁酮、环己酮、DMF、硫酸、甲基异丁基酮、乙二醇丁醚、三甲苯、二辛脂、三聚氰胺。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。