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The quantity of catalyst was equal to 0.6% of feedstocks,the reaction temperature was 78～110 ℃,and the reaction time was 45 min. The test results have shown that H_4SiW_(12-O_(40)/MCM-48 is an excellent catalyst for synthesizing butanone 1,2-propanediol ketal with its yield reaching over 91.9%.

实验表明：H4SiW12O40/MCM-48是合成丁酮-1，2-丙二醇缩酮的良好催化剂，在n∶n(1，2-丙二醇)=1∶1.6，催化剂用量为反应物料总质量的0.6%，环己烷为带水剂，反应时间45 min的优化条件下，丁酮-1，2-丙二醇缩酮的收率可达91.9%。

Compared to the catalyst withγ-Al2O3 ball as support, performance of the catalyst prepared by Si-Al ball impregnated active component was better for mixed butene oligomerization.

与以γ-Al2O3球为载体的催化剂相比，用硅铝小球浸渍活性组分制得的催化剂催化混合丁烯齐聚的性能较好。

The effects of degree of carbon deposition and regeneration,catalyst impurities,iso butylene impurity in feed stock as well as operational parameters on carbon deposition of W 201 catalyst for oxydehydrogenation of butene to butadiene have been studied.

从工业应用出发，研究了丁烯氧化脱氢制丁二烯W－201催化剂的结炭数量及再生、催化剂杂质元素分析、原料中异丁烯杂质及操作参数对催化剂结炭的影响等。

The supported catalyst was systematically optimized with respect to catalyst dosage and calcination temperature.

实验了催化剂的负载量和煅烧温度对催化剂活性的影响。

The results showed that new-type solid ferric potassium alum was a good catalyst for the synthesis of ethyl decanoate and the optimum conditions were as follows: molar ratio of acid to alcohol was 1∶2, the use level of catalyst was 0.6 g/0.05 mol capric acid, water-taking reagent benzene was...

结果表明，新型固体酸铁钾矾是合成癸酸乙酯的良好催化剂，在酸醇物质的量比为1∶2，催化剂用量为0.6g(0.05mol癸酸)，带水剂苯为15mL，反应时间为2.5h的条件下，癸酸乙酯的酯化率可达98%。

The results showed that new-type solid ferric potassium alum was a good catalyst for the synthesis of ethyl decanoate and the optimum conditions were as follows: molar ratio of acid to alcohol was 1:2, the use level of catalyst was 0.6g/0.05 mol capric acid, water-taking reagent benzene was 15 mL, reaction time was 2.5 h and the yield of ethyl decanoate could reach 98%.

结果表明，新型固体酸铁钾矾是合成葵酸乙酯的良好催化剂，在酸醇物质的量比为1：2，催化剂用量为0.69（0.05 mol癸酸），带水剂苯为15mL，反应时间为2.5h的条件下，癸酸乙酯的酯化率可达98%。

With the increasing of content of catalyst, the residue of Salix, Caragana and Poplar all dropped, the residue was lowest when content of catalyst was 7%.

随着催化剂用量的增加，沙柳、柠条和杨木的残渣率都下降，在催化剂用量7%时都达到最低。

It has also been studied that the influence of the cementite formation in catalyst Pt-Fe/C,as it is heated. In the end,the adsorptive oxygen on catalyst surface has been evaluated.

本文对铂铁合金催化剂中形成渗碳体的情况亦做了初步研究，分析了渗碳体的形成对催化剂性质的影响。

Here we applied many types of cinchona alkaloid derivatives and otherβ-aminoalchohol compounds in IFB reactions and investigated the effects of solvent, temperature and catalyst amount on the enantioselectivities in order to find the proper catalyst and optimize reaction condition.

本文考察了多种金鸡纳生物碱衍生物及其它一些β-氨基醇类化合物在IFB反应中的应用，并研究了催化剂的结构、溶剂效应、温度、催化剂用量及反应底物类型对立体选择性的影响，以筛选适合的催化剂和优化反应条件。

4The obtained solid alkali catalyst was applied to biodiesel preparation with colza oil and used oil as materials respectively and the technics was optimized by sigle-factor and orthogoral experiments with esterification rate as the index. The optimal technique conditions using colza oil were: the amount of solid catalyst 12%, the mol ratio of methanol to oil 9:1, reaction temperature 65℃, reaction time 3h, under which the esterification rate reached to 94.48%.

4以菜籽油和煎炸废油为原料，利用固体碱催化剂催化制备生物柴油，以转化率为考察指标，采用单因素和正交试验对工艺进行优化，得到以菜籽油为原料时制备的最佳工艺参数为固体催化剂投入量2.5％，醇油摩尔比9∶1，反应温度65℃，反应时间3h，转化率达到93.9％；以煎炸废油为原料时最佳工艺参数为反应温度65℃，反应时间3h，固体催化剂投入量4％，醇油摩尔比6∶1，转化率达到91.2％。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。