酯化了的

Solid superacid SO(superscript 2- subscript 4)/Fe2O3 was prepared and used as a green catalyst to replace traditional vitriol in synthesis of cellulose acetate.

合成了固体超强酸SO(上标 2-下标 4)/Fe2O3，并将其用作浓硫酸的绿色替代催化剂进行纤维素的醋酸酯化反应。

The methods of synthesizing polyurethane with the reaction of isophorone diisocyanate and paper were investigated.

研究了异佛尔酮二异氰酸酯对纸张聚氨酯化处理的方法。

In this paper, preparation of cholesterol by transesterificatiom of lanolin with different catalysts, i.e., sodium methoxide, formic acid, and two kinds of basic anion exchange resin, was investigated.

采用不同催化剂转酯化法从羊毛脂中获得游离胆固醇，分别研究了以甲醇钠、甲酸及强碱阴离子树脂为催化剂的工艺方法。

A method using α methylstyrene as raw material to prepare β methylene phenethyl alcohol,a new rose flavor ,by chlorination,esterification and saponification was studied.

对α 甲基苯乙烯经氯代、酯化、皂化合成新型玫瑰香料β亚甲基苯乙醇的方法进行了研究，选择PTC1作为相转移催化剂，当m∶m (NaAc·3H2 O)∶m (PTC1 )=1 。0 0 0∶0 30 0∶0 0 2 4时，80℃下反应 6h ，产率为 67 3%。

Thus, research on solid superacid has drawn more and more attention in industrial catalyst field.

采用溶胶-凝胶法制备了固体超强酸催化剂，考察它们在酯化反应中的催化活性。

Solid superacid catalyst was prepared by sol-gel method; its catalytic activity was investigated to synthesis of n-butyl acetate.

采用溶胶-凝胶法制备了固体超强酸催化剂，考察它们在酯化反应中的催化活性。

According to the results and data reported, it was given that the catalysis activity of iodine in acid and alcohol esterfication is not high.

将实验结果与文献数据综合分析，得出了碘作为催化剂在酸醇直接酯化反应中的催化活性不高。

Bromo-2-sulfolene (2) reacted with substituted benzoic acid salt s 3a～3c or alizarin yellow (3d) to give four novel allylic substitution products 4a～4d by esterification reaction, respectively.

以3，4-二溴环戊砜(1)为原料，在无水吡啶作用下发生消除反应，得到反应中间体4-溴-2-环戊烯砜(2)，再分别与一系列取代苯甲酸盐3a～3c以及茜素黄GG(3d)发生酯化反应，合成出4种新环戊烯砜衍生物4a～4d，并用IR，1HNMR，MS，元素分析等表征了它们的结构。

At last, the application of modified starch in the yoghourt was discussed.

最后，探讨了交联酯化GCWS淀粉在凝固型酸奶中的应用。

The effects of the sodium bisulfate dosage, reaction temperature, water content, methanol flow rate on the conversion rate of waste oils were investigated.

考察了硫酸氢钠用量、反应温度、反应体系含水量、甲醇流量等对酯化反应转化率的影响。

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。