环烷

Various naphthenic acid products is well sold at home and abroad including the countries of Japan, U.S, Singapore, German etc. and have established friendly trade and business relationship with them.

各类环烷酸产品畅销全国及远销美国、日本、新加坡、德国等，并与他们建立了良好的贸易关系与业务往来。

On the basis of , this paper further develops the technology that naphthenic acid is removed and recovered from straight-run diesel by the complex solution extraction method.

本文在的基础上，进一步开发出复合溶剂萃取法用于直馏柴油脱酸和回收环烷酸的工艺流程。

Naphthenic acid corrosion is the tough problem in processing high-acidity crude.

环烷酸腐蚀是炼制高酸值原油时遇到的一个难题。

Shell Diala are formulate d from top quality naphthenic base oils giving excellent insulation performance and corrosion protection.

壳牌大雅纳采用优质环烷基础油精制而成，具有良好的绝缘性能和抗腐蚀性能。

It was found that the crude oil types, compositions, operation temperature, materials of construction, fluid velocity and operating time had great influence on the naphthenic acid corrosion.

认为原油类型和组成、操作温度、设备材质、流速流态、操作时间等对环烷酸腐蚀有着重要的影响。

Effective measures are recommended to control the naphthenic acid corrosion of the pipe,including selection of corrosion-resistant 316 or 316L steels and modification of tee construction.

并提出了减缓阻垢剂进料管环烷酸腐蚀的措施，主要包括选用更耐蚀的316或316L材质以及改进三通结构等。

The possible mechanism was discussed. These bowl-shaped aggregates are promising candidates for nano reactor or drug carrier.4 2,7-dimethylene-1,4,6-trioxaspiro[4, 4]nonane with two vinyls was prepared to be used as electron-donor and crosslinker. The ATRP of this crosslinker and excess methylacrylate (used as electron-accpetor) was proved to mainly form homopolymers. With the chain-transfer agent S-1-Dodecyl-S\'-(α,α\'-dimethyl-α-acetic acid)trithiocarbonate, the copolymerization of the spiro hydrocarbon, maleic anhydride and MA by RAFT method produced star PMA.

这些由聚电解质复合物自组装形成的聚集体，在微反应器和药物释放等领域具有潜在的应用前景。4合成了双乙烯基的2，7-二亚甲基-1，4，6-三氧杂螺环烷，作为给电子单体和交联剂，与吸电子单体马来酸酐或过量的丙烯酸甲酯形成电荷转移络合物共同聚合，尝试了用ATRP和RAFT方法一步法合成星形聚合物。

The results show that reaction of petroleum waxes to light is photooxidative reaction of free-radical which is caused by nitrogen-containing, oxygen-containing and aromatic compounds.

发现渤海原油的石油酸主要是由环烷酸所组成，直链脂肪酸含量较少，支链脂肪酸随着馏分沸点的升高含量逐渐降低。

Preparation of o toluic acid from o xylene over cobalt naphthenate catalyst in the presence ofair in liquid phase oxidation is presented.

对采用空气作氧化剂，环烷酸钴作催化剂，由邻二甲苯液相氧化制备邻甲基苯甲酸的反应条件，在中型半连续鼓泡床反应器上，评价了反应温度、反应压力、空气流量以及反应时间对产物邻甲基苯甲酸单程质量收率的影响。

A method of preparing o - toluic acid from o - xylene with air as oxidiaing agent, cobalt naphthenate as catalyst by liquid - phase oxidation was introduced.

介绍了采用空气作氧化剂、环烷酸钴作催化剂，由邻二甲苯液相氧化制备邻甲苯甲酸的方法。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失