异戊酸

A series of polyurethane anionomers were synthesized from isophorone diisocyanate, polyneopentanediol adipate and dimethanol propionic acid.

用异佛尔酮二异氰酸酯、聚己二酸新戊二醇酯和二羟甲基丙酸合成了负离子型聚氨酯离聚体。

The synthesis of i amyl acetate from i amylic alcohol and acetic acid using silica gel carrier acid as catalyst is reported.

以乙酸和异戊醇为原料，采用硅胶载体酸为催化剂合成乙酸异戊酯。

Amyl cinnamate was synthesized from cinnamic acid and amyl alcohol using tungstosilicic acid as catalyst.

以钨硅酸为催化剂，马来酸酐和异戊醇为原料催化合成马来酸二异戊酯。

Meanwhile, the optimum operation conditions obtained by orthogonal experiment are as follows: microwave power is 585 W, irradiation time is 30min, the amounts of catalyst is 1.5% of feed stock, mole ratio of alcohol to acid is 1.5:1, the yield of isoamyl chloroacetate is 93.2% Comparing with conventional heating method, the heating time under microwave irradiation is less than 1/14 of the former.

最佳工艺条件为：微波功率585W，加热时间为25min，催化剂用量为2.0%，醇酸比为1.5：1，此条件下氯乙酸异戊酯的产率为93.2%。对比实验结果表明，微波辐射加热法合成氯乙酸异戊酯的反应速度至少是常规加热法的14倍。

The result showed due to yeast fermentation process there were many new aroma components in jujube wine which were different from the juice: Isoamyl alcohol, Phenylethyl alcohol, Benzyl alcohol and so on; jujube juice hexadecanoic acid and other senior fatty acid composition obviously degradated; Alcohols and esters composition were sharply upward.

反映出发酵过程由于酵母的繁殖代谢产生了很多新成分，如异戊醇，丁酸乙酯，辛酸乙酯等；枣汁中十六酸等高级脂肪酸成分明显降解，苯乙醇，2，3-丁二醇，己二酸(2-甲基)丁酯，己二酸二异丙酯等醇类和酯类成分呈急剧上升的趋势。

The optimum reaction conditions of the synthesis of isoamyl acetate with Nafion NR50 resin membrane as catalyst were studied.

以全氟磺酸树脂膜为催化剂得到冰乙酸和异戊醇反应合成乙酸异戊酣适宜的反应条件。

Isoamyl acetate was synthesized with acetic acid and isopentyl alcohol by using Ca(p-CH3C6H4SO3) 2 as catalyst.

以乙酸和异戊醇为原料、对甲苯磺酸钙为酯化催化剂合成乙酸异戊酯，研究影响酯化率的因素。

Results The mixing, loading and storing processes of the construction, might generate lots of occupational hazards, including toluene, dimethylbenzene, trimethylbenzene, isopropanol, butyl alcohol, propanol, methyl methacrylate, butyl acetate, methyl isobutyl ketone, methyl ethyl ketone, acetic ether, nitro-cotton, n-hexane, n-heptane, carbinol, ethanol, ethyl propionate, diisobutyl ketone, glycol ether, isoamyl acetate, 2,4-toluene diisocyanate, isophorone, noise, power frequency electric fields.

结果 该项目在混兑生产和装卸、仓储过程中，可能产生的职业病危害因素主要有甲苯、二甲苯、三甲苯、异丙醇、丁醇、丙醇、甲基丙烯酸甲酯、乙酸丁酯、甲基异丁基甲酮、丁酮、乙酸乙酯、硝化棉、正己烷、正庚烷、甲醇、乙醇、乙酸丙酯、二异丁基甲酮、乙二醇乙醚、乙酸异戊酯、2，4甲苯二异氰酸酯、异佛尔酮、噪声、工频电场。

The esterification reaction was carried out in isooctane solvent at 50℃, with 0.15mol/L of substrate and 1:1.4 of acid-alcohol molar ratio.

研究了反应温度、溶剂、底物浓度、底物摩尔比、吸水剂用量等因素对酯化反应的影响，确定了正戊酸异戊酯的最佳合成条件为：反应温度为50℃，异辛烷为反应介质，底物浓度为0.15mol/L，酸醇摩尔比为1：1.4。

Esterification of acetic acid with isoamyl alcohol catalyzed by ferric chloride was studied,and effect of different factors such as reaction time,dosage of catalyst and ratio of acetic acid to isoamyl alcohol on the yield of isoamyl acetate was carefully examined.

研究了以三氯化铁为催化剂乙酸与异戊醇的酯化反应，考察了反应时间、催化剂用量、醇酸摩尔比等因素对乙酸异戊酯收率的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。