查询词典 methoxide

Condensation of cinnamaldehyde with methyl crotonate in the presence of alcohol-flee potassium methoxide gives,after hydrolysis,p-phenyl-benzoic acid in low yield.Its structure has been ascertained by direct comparison with an au- thentic sample.

桂皮醛与α-丁烯酸甲酯在催化剂去醇的甲氧基钾影响下进行反应，得到低产率的对-苯基-苯甲酸，共结构经用已知方法所得同样的酸直接加以比较而确定。

The main products are as follows: Pharmaceutical Intermediate, Trimethyl Orthoformate , Triethyl Orthoformate, Sodium Methoxide, Power and solution Ethoxide,α-Chloropropionyl Chloride, Acetyl Chloride. Shandong Xinhua Junli Chemical Co.,Ltd.

公司主要产品为医药中间体，原甲酸三甲酯、原甲酸三乙酯、甲醇钠、乙醇钠、α-氯代丙酰氯、乙酰氯，其中原甲酸三甲酯、原甲酸三乙酯是国内唯一采用金属钠法工艺生产的企业。

By reacting isobutyraldehyde with diethyl oxalate using sodium methoxide as catalyst,3-methyl-2-oxobutanoic acid,sodium salt was prepared by one pot.

采用甲醇钠催化异丁醛与草酸二乙酯反应，一釜法合成了3-甲基-2-氧代丁酸钠。

By reacting isobutyraldehyde with diethyl oxalate using sodium methoxide as catalyst,3-methyl-2-oxobutanoic acid,sodium salt was prepared by one pot.

3-甲基-2-氧代丁酸钠是一种重要的酮酸类化合物，它在制药工业、高分子工业、食品工业、日化业等领域都有着广泛的用途。

The data of element analysis,melting point,IR and NMR for the product are consistent with the standard data,the purity exceeds 98%.3-methyl-2-oxobutanoic acid sodium ; sodium methoxide ; isobutyraldehyde ; diethyl oxalate

WSR-1熔点仪；Vario EL元素分析仪(德国E le-mentar公司)；Nexus 870型傅立叶变换红外光谱仪；aV500核磁共振仪。1.2 3-甲基-2-氧代丁酸钠的制备将15.4 g(0.28 mol)甲醇钠与60 mL(1.5 mol)甲醇装入500 m

For the next 45 minutes the propellers will blend the oil and methoxide, sustaining a reaction.

在接下来的45分钟的螺旋桨将混合油和甲醇，维持一个反应。

He activates another pump and the methoxide is transferred to the milk tank, too.

他激活另一个泵和甲醇转移到牛奶罐也。

While the methoxide is blending, he turns back to the oil.

虽然是甲醇混合，再回头向石油。

Using magnesium methoxide as a heterogeneous catalyst to produce biodiesel was put forward,and the corresponding process for catalyst disposal was researched.

开发了以甲醇镁为非均相催化剂制备生物柴油的工艺流程，研究了相应的催化剂后处理工艺。

Dimethyl carbonate is synthesized directly from carbon dioxide and methanol in the presence of magnesium methoxide .

报道一种在甲醇镁作用下，由二氧化碳及甲醇直接合成碳酸二甲酯的反应过程。

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。