The synthesis of 1,4 dioxane from diethylene glycol using p toluene sulphonic acid as a catalyst was discussed.

1、

Determination of Dioxane in Alkyl Alcohol Polyoxyethylene Ether

烷基醇聚氧乙烯醚中二恶烷的测定

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2、

Extraction in dioxane indicated that the hydroxymethyl lignin took part in the solidification reaction of novolac.

二氧六环抽提结果表明，羟甲基化木质素参与了固化交联反应。

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3、

Their quantum yields were about 0.4 in dioxane.

在二氧六环中它们的量子产率为0.4左右。

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4、

The study of flame retardants on thermal degradation and charring process of dioxane lignin in the condensed phase

阻燃剂对二氧杂环己烷木质素的热降解行为和成炭过程的研究

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5、

Mechanism of anionic polymerization of isoprene in cyclohexane-dioxane

异戊二烯在环己烷-二氧六环中的负离子聚合机理

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6、

Dioxane has been frequently detected in river water, especially in ground water polluted by volatile halogenated hydrocarbons.

1,4-二恶烷经常会在河水、特别是地下水中被检测到，这主要是由于挥发性的卤代碳氢化合物造成的污染。

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7、

Studies on the pervaporation separation of dioxane/ water mixture by the sulfonated polyethylene ion-exchange membrane

磺化聚乙烯离子交换膜渗透汽化分离二氧六环／水混合物研究

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8、

The Study on the Formation of Copper ( II) Complexes of Amino Acids in 40% Dioxane Water Medium

40%二氧六环-水溶液中氨基酸铜配合物的形成研究

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9、

Synthesis of an optically active triblock copolymer and its self assembly behavior in dioxane/ water

光学活性三嵌段刚柔共聚物的合成和在二氧六环/水中的自组装

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10、

Study on Synthesis of Dioxane from Catalytic Cyclization of Diethylene Glycol

一缩二乙二醇催化脱水制取1,4-二氧六环的研究

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11、

Studies on viscosity properties of dioxane-lignin sol

二氧六环-木素溶胶粘度特性的研究

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12、

The experiments showed that the Mannich reaction in dioxane aqueous solution could improve the reaction efficiency obviously.

结果表明，Mannich反应在二氧六环水溶液均相介质中进行，可明显提高反应效率；

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13、

The cosmetics were extracted with water and dioxane was dissolved completely.

样品用适量的水提取，将二恶烷完全溶解。

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14、

Investigation on ASP-Type Solid Acidic Catalysts Used for Synthesis of Dioxane

用于1,4-二氧六环合成的ASP型固体酸催化剂

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15、

Article 14 Aliens who, in compliance for prolonged or permanent residence in China upon approval by the competent authorities of the Chinese Government.

第十四条依照中国法律在中国投资或者同中国的企业、事业单位进行经济、科学技术、文化合作以及其他需要在中国长期居留的外国人，经中国政府主管机关批准，可以获得长期居留或者永久居留资格。

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16、

Article 2 Aliens must obtain the permission of the competent authorities of the Chinese Government in order to enter, transit or reside in China.

第二条外国人入境、过境和在中国境内居留，必须经中国政府主管机关许可。

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17、

Article 10 The competent authorities of the Chinese Government shall issue appropriate visas to aliens according to the purposes stated in their entry applications.

第十条中国政府主管机关根据外国人申请入境的事由，发给相应的签证。

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18、

Both women had hired illegal aliens for child care.

两个女人都曾雇过非法入境者照看孩子

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19、

He was interested in alien cultures.

他曾对异域文化感兴趣。

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20、

They were opposed to the presence of alien forces in the region.

他们反对外国军队驻扎在该地区。

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