RESULTS Estrogen 3-methyl ether was obtained with high yield.
结果以高收率合成了目的化合物。
OBJECTIVE To improve the preparation of estrogen 3-methyl ether.
目的改进雌激素类化合物3位酚羟基的甲醚化工艺。
In this paper, the cedrol methyl ether was synthesized by sodamide method.
本文采用氨基钠法合成甲基柏木醚。
Researches in propanediol methyl ether synthesis catalysts were reviewed in this paper.
综述了丙二醇甲醚合成催化剂研究的最新进展。
This article introduces the new purification process for methanol-methyl ether and the process indexes.
介绍了双甲精制新工艺的流程及工艺指标等。
Application of oleanane-28-carboxylic methyl ether-2, 11, 13 (18) -triene in preparing medicament for treating skin diseases.
齐墩果烷- 28 -羧酸甲酯- 2,11,13(18)-三烯在制备治疗皮肤疾病药物中的应用。
Original producing o(p) -nitrophenyl methyl ether methods are batch process with long cycle, high energy consumption and low efficiency.
生产邻（对）硝基苯甲醚的传统方法都是间歇法操作，周期长、能耗高、效率低。
The etherification of isoamylenes and methanol to form tert all methyl ether (TAME) by benz-sulfonic acid cation exchange resin as catalyst, was studied.
研究了苯磺酸型树脂催化的异戊烯和甲醇的醚化，考查了温度、醇烯比和空速对反应的影响。
Sodium bisulfate was used as the catalyst for esterification of ethylene glycol mono-methyl ether and acetic acid to ethylene glycol monomethyl ether acetate.
将硫酸氢钠作为由乙二醇单甲醚和乙酸酯化合成乙二醇单甲醚乙酸酯的催化剂。
The comb copolymer brushes were subsequently prepared via surface-initiated atom transfer radical polymerization of poly (ethylene glycol) methyl ether methacrylate (PEGMA).
紧接着，表面引发甲基丙烯酸聚乙二醇酯(PEGMA)原子转移自由基聚合制备梳型聚合物刷。
The fir essential oil was extracted from fir root by steam distillation method, from which cedrol was extracted, and then, cedrol methyl ether was synthesized based on cedrol.
以杉木根为原料通过水蒸气蒸馏法提取杉木精油，从杉木根精油中精制提取柏木脑，再以柏木脑为原料合成甲基柏木醚。
A new process has been developed to synthesize p-aminophenol methyl ether from p-nitrophenol methyl ether by catalytic hydrogenation, using ammonia synthesis gas instead of pure hydrogen.
采用合成氨厂氨合成气代替纯氢气催化氢化邻硝基苯甲醚合成邻氨基苯甲醚的新工艺，探讨了合成反应条件对邻氨基苯甲醚收率的影响规律。
A new process has been developed to synthesize p-aminophenol methyl ether from p-nitrophenol methyl ether by catalytic hydrogenation, using ammonia synthesis gas instead of pure hydrogen.
采用合成氨厂的氨合成气代替纯氢气使脂肪腈加压催化氢化 ，可一步制得双脂肪烃基仲胺。
The invention further provided a method for preparing methyl alcohol, dimethyl ether and low-carbon olefin, and the catalyst can be the amorphous alloy or the catalyst provided by the invention.
本发明还提供了一种由合成气转化为甲醇、二甲醚和低碳烯烃的方法，该方法所采用的催化剂为本发明提供的非晶态合金或本发明提供的催化剂。
Previously, MTBE (methyl tertiary-butyl ether) was the oxygenate of choice, but fell out of favour in 2004 when it was found to contaminate ground water.
以前，MTBE（甲基叔丁基醚）曾作为汽油充氧剂，但是，在2004年，人们发现它污染了地下水，所以就不再使用它了。
Based on the principle of ester hydrolyzation to ether in alkali condition, the process for preparation of dimethyl sulfide from sodium methyl sulfate residue was investigated.
根据酯在碱性条件下水解反应生成醚的原理，研究了以甲基硫酸钠废渣为原料制备二甲基硫醚的方法。
Methyl tert-butyl ether (MTBE) is widely used as an addictive in unleaded gasoline to curb the air pollution caused by leaded gasoline.
甲基叔丁基醚(MTBE)作为一种新型的无铅汽油添加剂被广泛应用以减少含铅汽油对空气的污染。
Methyl tertiary butyl ether (MTBE), a new gasoline additive, is added to gasoline as an octane enhancer and used to reduce automotive emissions.
甲基叔丁基醚(MTBE)是一种新型的汽油添加剂，被用来提高汽油辛烷值和减少汽车尾气中有害物质的排放。
Methyl tertiary butyl ether (MTBE) is a new gasoline additive used to increase gasoline octane value and decrease the exhaust of some harmful pollutants, but there is still debate on its toxicology.
甲基叔丁基醚(MTBE)是一种新型的汽油添加剂，常用来提高汽油辛烷值和减少汽车尾气中有害物质的排放。
The study results of the toxicity of methyl tertiary butyl ether (MTBE) were reviewed.
对国内外有关甲基叔丁基醚（MTBE）毒性的研究结果作了综述。
Neither polymethylmethacrylate nor polymethylmethacrylate-grafted copolymer could be isolated by the reaction of polystyrene methylene lithium prepared in ether solution with methyl methacrylate.
在乙醚溶液制得的聚苯乙烯次甲基锂与甲基丙烯酸甲酯反应不能分离出聚甲基丙烯酸甲酯及它的接枝共聚物。
Previously, MTBE (methyl tertiary - butyl ether) was the oxygenate of choice, but fell out of favour in 2004 when it was found to contaminate ground water.
以前广泛使用的增氧剂是甲基叔丁基醚，后来有研究发现甲基叔丁基醚会污染地下水，因此在2004年久停止使用了。
Methyl tert-butyl ether(MTBE)is widely used as reformulated gasoline oxygenate. It is so much used that the amount of MTBE discharged into the environment is increasing continuously.
目前甲基叔丁基醚（MTBE）被广泛用作汽油添加剂，通过各种排放途径进入环境的数量不断增加。
The production, supply and demand of methyl tert-butyl ether (MTBE) at home and abroad are reviewed and the techno-economic indices of production technologies are also compared in this paper.
综述甲基叔丁基醚(MTBE)的国内外生产和供需状况以及生产工艺技术经济指标对比。
The separation of meta- and para- methyl cresol ether using six type of packed and fused silica capillary columns is compared.
比较了不同固定液的填充柱和毛细管柱对间、对甲酚甲醚异构体的分离效果。
Ten of them were identified. They are ethylene, propylene, isobutane, cyclobutane, three isomeric butenes, methyl ethyl ether, ethyl isopropyl ether, and ethyl acetate.
它们是乙烯，丙烯，异丁烷，环丁烷，丁烯类化合物三个，甲基乙基醚，乙基异丙基醚，乙酸乙酯。
In four extracts from PMEW treated with methyl alcohol and water, petroleum ether, chloroform and ethyl acetate, extract rate of methyl alcohol and water was the highest.
通过对PMEW萃取分离发现，在甲醇水、氯仿、石油醚和乙酸乙酯四种萃取物中仍以甲醇水的萃取率最高。
This study is to explore the genotoxicity of methyl tertiary buty1 ether(MTBE) produced in China.
探讨国产甲基叔丁基醚（MTBE）的遗传毒性。
DMC has about 3 times the oxygen content as methyl tert-butyl ether (MTBE) and its synthesis is not dependent upon FCU isobutylene yields like MTBE.
DMC的含氧量大约是甲基叔丁基醚(MTBE)的三倍，它的合成也不像MTBE那样依赖于异丁烯的产量。
DMC has about 3 times the oxygen content as methyl tert-butyl ether (MTBE) and its synthesis is not dependent upon FCU isobutylene yields like MTBE.
DMC的含氧量大约是甲基叔丁基醚(MTBE)的三倍，它的合成也不像MTBE那样依赖于异丁烯的产量。
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