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A process for preparing alkylene glycols including reacting an alkylene oxide with water in the presence of a combination of additives and an anion exchange resin, wherein the combination of additives comprises carbon dioxide and an organic or inorganic base provided in an amount sufficient to maintain a pH of the reaction mixture between about 5.0 and 9.0, with the proviso that, when the base is bicarbonate or carbonate, then the anion exchange resin is a trimethyl benzyl ammonium anion exchange resin.

制备亚烷基二醇的方法,包括让烯化氧与水在添加剂组合和阴离子交换树脂存在下进行反应,其中添加剂组合包括二氧化碳和以足以保持反应混合物的pH值在约5.0和9.0之间的量提供的有机或无机碱,前提条件是当碱是碳酸氢盐或碳酸盐时,阴离子交换树脂是三甲基苄基铵阴离子交换树脂。

Influences of the mole ratio of reactants,reaction time,dosage of catalyst and cyclohexane on yield are discussed.

考察了酸醇的物质的量比、反应时间、催化剂用量和带水剂用量等因素对酯收率的影响。

The yield of morpholine can be 35% and the yield mixed alcohol can be 42% under temperature of 210℃, pressure of 2.0 MPa, the mass ratio of the water and morpholine by-product was of 1:1, using sodium hydroxide as catalyst, and the amount of 1.5% for the by-product, reaction time of 4 hours.

在210℃,2.0MPa下,水与副产物的质量比为1:1,采用氢氧化钠为催化剂,用量为副产物的15%,反应时间为4小时,吗啉的收率可达35%,混合醇的收率可达42%。

SW480 and SW620 cells were also used to study the gene regulation with high carbohydrate intake, where it was shown that during glycolysis eight genes, HK1 (nuclear gene encoding mitochondrial protein, transcript variant 1), GPI, GAPD (glyceraldehyde-3-phosphate dehydrogenase), PGK1 (phosphoglycerate kinase 1), PGK2 (phosphoglycerate kinase 2), ENO2 (enolase 2), PKM2 (pyruvate kinase, muscle, transcript variant 2) and GLUT1 (facilitated glucose transporter, member 1) are over-expressed. In our study, we also found that during hypoxia of cancer tissues the resulting up-regulation of HIF-2α(hypoxia-inducible factor 2, alpha subunit) would in turn up-regulate the GLU1 gene, further activating glycolysis.

另一方面,在高碳水化合物的调控研究上,吾人也利用SW480和SW620细胞株分析证实醣解水解活化过程中,其六碳醣激酶-1(HK1)、葡萄糖磷酸异构酶、3-磷酸甘油醛脱氢酶、磷酸甘油酸激酶-1(PGK1)、磷酸甘油酸激酶-2(PGK2)、烯醇酶-2(ENO2)、丙酮酸激酶-2(PKM2)以及葡萄糖输送蛋白-1(GLUT1)等共有8个基因是连续上升的过度表现;此外,吾人也发现当癌细胞在缺氧的组织中,其缺氧转录子-2α基因(HIF-2α)表现上升后,会活化GLU1基因上升,进一步活化醣解代谢的进行。

Hydration reaction experiment of turpentine catalyzed by ZrO2/SO4-was conducted to study the catalytic function of ZrO2/SO4-and explore the optimum process conditions for synthesizing α-Terpineol.

通过用固体超强酸Zr02/SO4-为催化剂催化松节油水合反应的实验,从中考察了此固体催化剂的催化性能,研究了合成α-松油醇的最佳工艺条件。

Various synthetic method of 1,3-propanediol were introduced and compared, including hydration and hydrogenation of acrylaldehyde, carbonylation of epoxy ethane , microbiological fementation, the process starting from methyl aldehyde, etc.

介绍了1,3-丙二醇的几种制备方法,即丙烯醛水合-氢化法、环氧乙烷羰基化法、微生物发酵法和以甲醛等为原料的方法。

Factors of esterfication of mixed dibasic acid were studied: alcohol acid mol ratios, the content of the catalysts, the reaction time and the content of water carrier.

实验考察了混合二元酸酯化的影响因素:醇酸摩尔比、催化剂用量、反应时间以及带水剂的种类和用量对酯化率的影响。

For the first time, the pervaporation composite membranes with thickness of 5-30μm phosphatic poly active layer were prepared and utilized for the separation of ethanol-water mixture and in the coupled membrane reactor.

首次以磷酸酯化聚乙烯醇为活性分离层制备了活性层厚度为1-30μm的PPVA复合膜,并用于乙醇-水混合物的分离及复合膜反应器中。

Oil-soluble Ag2S nanoparticles surface-modified by dialkyldithiophosphate were prepared by chemical synthesis.The synthesized Ag2S nanoparticles were characterized by transmission electron microscopy,X-ray powder diffraction spectroscope and UV-vis spectrophotometer.The friction and wear tests were carried out by a DF-PM dynamic and static friction tester.

在水醇混合介质中,采用同阳离子共沉淀法合成了有机化合物表面修饰的Ag2S纳米微粒,在高速钢基底上制备成膜,研究了它的摩擦学特性。

The effects of catalyst composition, reaction temperature, space velocity, molar ratio of methanol to water, and reaction time on the performance of the microchannel reactor were investigated.

考察了催化剂涂层的配比、反应温度、水醇比、进料速度、反应时间对甲醇重整微槽道反应器性能的影响。

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