查询词典 ketal

Various synthetic methods of the cleavable cyclic acetal-type and ketal-type surfactants were reviewed to provide references for the synthetic route design of these type surfactants and their major research direction in the future were indicated.

综述了可分解型环状缩醛类和缩酮类表面活性剂的各种合成方法，为该类表面活性剂的合成路线设计提供参考，并指明了今后的主要研究方向。

Catalytic synthesis of ketal by urushiol-formaldehyde neodymium polymer from cyclohexanone and ethanediol was studied.

以环己酮和乙二醇为原料，漆酚缩甲醛钕聚合物为催化剂合成了环己酮乙二醇缩酮。

Acetophenone cylic ethylic ketal was synthesized by using acetophenon e and glycol as reactants,and rare-earth solid superacid SO 2- 4-La 3 +/TiO 2 as c atalyst.Factors affecting the product yield were investigated.

以稀土固体超强酸SO2 -4-La3 +/TiO2 为催化剂，苯乙酮和乙二醇为原料催化合成苯乙酮环乙二缩酮，并考察了影响反应的因素。

The reaction time, the using regenerated catalyst on the yield of Cyclohexanonel, 2-propylene ketal were systematically investigated.

研究了杂多化合物K5CoW12O403H2O作为催化剂对环己酮和1， 2-丙二醇缩酮的催化活性。

The effects of reactant molar ratio, amount of catalyst, microwave irradiation power, microwave irradiation time on the yield of cyclohexanone glycol ketal were studied.

探讨了酮醇物质的量比、催化剂用量、微波功率和辐射时间对产品收率的影响。

The condensation reaction of levulinates with ethylene glycol brings about corresponding ketal , with respective productivity of 74%, 75% and 75%, and respective structure being verified by IRS.

由乙酰丙酸酯类化合物与乙二醇进行缩合反应，得到相应的环状缩酮化合物，产率分别为 74 %，75 %和 75 ，其结构为红外光谱所证

Fe2(SO4)3/SiO2 catalyst is excellent in stability and reusability, and yield of cyclohexanone 1, 2-propanediol ketal keeps at 88.90% after being used for 5 times.

Fe2(SO4)3/SiO2催化剂具有良好的德定性，重复使用5次后环己酮1， 2-丙二醇缩酮的收率为88.90%。

Under microwave irradiation ,cyclohexanone 1,2-propylene ketal was synthesized from cyclohexanone and 1,2-propanediol using HPW as catalyst.

在微波辐射下，以磷钨酸为催化剂，以环己酮和1，2-丙二醇为原料合成了环己酮1，2-丙二醇缩酮。

Silicasulfuric acid was used as the catalyst for synthesis of Cyclohexanone 1, 2-propylene ketal from cyclohexanone and 1, 2-propylene glycol. The effect of catalyst dosage, molar ratio and reflux time to reaction were investigated.

以磺化硅胶为催化剂，以环己酮和1，2-丙二醇为原料合成环己酮1，2-丙二醇缩酮，考察了催化剂的用量、原料配比和回流时间对反应的影响。

H3PW6Mo6O40/TiO2 was used as the catalyst in the synthesis of cyclohexanone ethylene ketal. The effects of varying the n:n ratio, catalyst dosage and reaction time on the yield were investigated.

以H3PW6Mo6O40/TiO2为催化剂，对以环己酮与乙二醇为原料合成环己酮乙二醇缩酮的反应条件进行了研究，较系统地研究了酮醇物质的量比、催化剂用量、反应时间对收率的影响。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。