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The influence of reaction temperature and reaction time on degree of esterification were investigated.

通过正交实验考察了反应时间、反应温度对聚乙烯醇酯化程度的影响。

Influence of alcohol-to-acid mole ratio, reaction temperature, catalyst dosage and reaction time on the esterification was investigated.

考察了醇酸物质的量比、温度、催化剂用量、反应时间等各种因素对酯化率的影响。

Some factors affecting the etherification, such as temperature, time and catalysts etc, were studied, and the relatively optimal reaction conditions were worked out molar ratio of reaction material/catalyst 1/1, T=100, t=1 h.

研究了影响醚化反应的一些因素，如温度、时间、催化剂等，并在此研究基础上得出了较佳的醚反应条件为：物料／催化剂的摩尔比为1/1，温度为100℃，时间为1 h。

Propene hydration etherification reaction catalyzed by β zeolite was studied by using in situ FT IR technique, and the effects of surface acidity on the reaction were discussed.

采用原位红外光谱技术，对β沸石催化剂上的丙烯水合醚化反应过程进行了研究，并结合催化剂的表面酸性进行了讨论。

In pilot test of 150 t/a of synthesizing ethylene glycol tbutyl ether from isobutene and ethylene glycol, reaction temperature, catalyst life, reaction heat draw and affection of LHSV on etherization are investigated.

通过异丁烯与乙二醇合成乙二醇特丁醚 1 50 t/a中间试验，考察了反应温度、液体空速对醚化反应的影响及反应器的撤热情况，考察了催化剂的寿命，提出精制各塔操作参数和产品质量指

This article provided a new route to produce 4-dimethoxy phenethylamine. In basic condition, the product could be obtained through etherization, bromation, Grignard reaction, hydroxyethylation, esterification and Gabriel reaction with phenol as raw material, the overall yield is 45.0%.

提出了合成4-甲氧基苯乙胺的新方法，即在碱性条件下，苯酚首先与硫酸二甲酯反应，再选用高选择性的溴化剂溴化后，经格氏反应、羟乙基化反应和酯化反应，最后经Gabriel反应可以制备目标产物，反应总收率为45.0%。

The optimum conditions were as follows: ethylamine was 370 mmol; n:n:n was 1.0:2.1:2.1; PEG-600 was 5 mol%; the first stage reaction was carried out at 42 ℃ for 6 h and the rsecond stage reaction was at 60 ℃ for 7 h.

较佳的反应条件为：乙胺370 mmol，n：n：n=1.0：2.1：2.1，PEG-6005 mol%，第一段于42℃反应6 h；第二段于60℃反应7 h，收率71.58%。

The optimun technological conditions were studied on the synthesis of 9-flourenylmethanal by the reaction of flouren and ethyl formate , and the synthesis of 9-flourenylmethanol by the reaction of 9-flourenylmethanal and methanal with sodium ethylate as catalyst.

研究了乙醇钠为催化剂，由芴与甲酸乙酯合成芴甲醛，再由芴甲醛与甲醛合成苯甲醇的工艺条件，结果表明：合成芴甲醛时，当芴为 16g时，催化剂乙醇钠 4 。

The first ethynyl group is reacted with the first reactive group in a first carbon-carbon bond formation reaction and the second ethynyl group is reacted with the second reactive group in a second carbon-carbon bond formation reaction to crosslink the first backbone with the second backbone, thereby forming the packaging substrate.

在第一个碳－碳键生成反应中，使第一个乙炔基与第一个反应性基反应，在第二个碳－碳键生成反应中，使第二个乙炔基与第二个反应性基反应，将第一种主链与第二种主链交联，从而制成组装基片。

The slurry pH in the reaction tank is a function of the excess limestonein the lank, the sulphur dioxide removed and a solid residence time in the absorber reaction tank.

在吸收塔反应箱里的石灰浆液PH值是由在箱里过剩的浆液、被去除的二氧化硫和石灰在反应箱里滞留的时间共同决定的。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新