丁烷

In this paper reported a new technology of preparing butyl gallate from sodium gallate and n-chlorobu-tane.

报道了由没食子酸钠和氯代正丁烷合成没食子酸丁酯的新工艺。

Firstly, quantum chemical method was employed to investigate the mechanism of cationic ring-opening polymerization of tetrahydrofuran and butylene oxide.

本文首先应用量子化学方法分别探讨了四氢呋喃和环氧丁烷的阳离子开环聚合反应机理。

Its main components include propane, butane and butylene.

主要成份是丙烷、丁烷、丁烯等。

When used as vehicle fuel, it is commonly known as liquefied petroleum gas (LPG or LP-gas), which can be a mixture of propane along with small amounts of propylene , butane , and butylene .

当用作汽车燃料，它通常被称为液化石油气，这可能是一个混合丙烷连同少量的丙烯，丁烷和丁烯。

The mechanism of ring-opening cationic polymerization reaction of tetrahydrofuran and butylene oxide was analyzed on the basis of electronic microstructures by using frontier orbitaltheory.

求取了四氢呋喃和环氧丁烷单体与仲氧鎓离子反应的过渡态，并根据频率分析和内禀反应坐标计算对过渡态的合理性进行了确认。

In this disseration, the cationic ring open-polymerization mechanism of THF、 butylene oxide and ethylene oxide were studied on the basis of electronic microstructures by using quantum chemicl method.

本文选取四氢呋喃、环氧丁烷和环氧乙烷的阳离子开环聚合为研究对象，运用量子化学方法从微观层次上对烷氧基化开环聚合过程进行了较为全面的研究。

The wheel inside the lighter is made from strong carborundum.

打火机里装着的汽油或丁烷气，也很容易「冒火」，打火机的转轮是用坚硬的金刚沙装成的，当你用它去撞击，摩擦打火石时，一方面因为摩擦发热；另一方面也从打火石上擦下一些铈、镧的粉末，这些灼热的粉末在空气中立即燃烧起来，迸出火星。

In this paper, the hydrophobic cellulose nitrate microporous composite membranes have been obtained by modification of hydrophilic cellulose nitrate microporous membranes by the use of plasma polymerization of octafluorocyclobutane.

本文以八氟环丁烷为单体，采用等离子体聚合法将亲水性硝酸纤维素微孔膜改性，制得疏水硝酸纤维素微孔复合膜。

Gas Distribution series of devices - from the control point of view, a semi-automatic and fully automatic with two gas from the gas source is composed of two groups of (liquefied petroleum gas, compressed air) and three groups of (nitrogen , Hydrogen, propane or butane) of the points is to provide natural gas and gas cities of the ideal alternative source of gas equipment, especially for gas production-line equipment manufacturers and test firing of Quality Supervision, Inspection departments for laboratory and performance of combustion Test.

从配气气源组成有二组份及三组份（氮气、氢气、丙烷或丁烷）之分；是提供天然气和城市人工煤气替代气源的理想设备，特别适用于燃气器具生产企业在线生产试烧和质量监督检验部门用于实验室及燃烧性能的检验。

The company's main product is high-pressure foam machines, laminating machines, various types of polyurethane products production line, premixed raw materials, storage transportation system, and at the same time undertake cyclopentane, isobutane reconstruction project and polyurethane equipment overhaul , Alteration, repair equipment important spare parts sales.

公司的主要产品为高压发泡机、层压机、各类聚氨酯制品生产线、原料预混、储存输送系统等，并同时承接环戊烷、异丁烷改造工程及聚氨酯设备的大修、改造，设备重要零配件的维修、销售。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。