石油化学

De Wit seeds with petrol ether,purified water and 95% ethanol was studied using test tube method.The chemical components of Leucaena leucocephala de Wit seeds were preliminarily demonstrated using precipitation reaction and color reaction of multiple indicators.

方法采用试管反应法，对银合欢种子的石油醚、水、95%乙醇提取物进行研究，通过多种指示剂和显色剂的沉淀反应或颜色反应，对银合欢种子可能含有的化学成分进行初步研究。

MethodsThe mixture was extracted from Leucaena leucocephala de Wit seeds with petrol ether,purified water and 95% ethanol was studied using test tube method.The chemical components of Leucaena leucocephala de Wit seeds were preliminarily demonstrated using precipitation reaction and color reaction of multiple indicators.

方法采用试管反应法，对银合欢种子的石油醚、水、95%乙醇提取物进行研究，通过多种指示剂和显色剂的沉淀反应或颜色反应，对银合欢种子可能含有的化学成分进行初步研究。

Department of Chemical Engineering, Chengde Petroleum College, Chengde, Hebei 067000, China）Single ozone oxidation, single active carbon absorption and ozone oxidation-active carbon absorption technology were studied in order to discuss the practicability of removal of micro-content nitrobenzol in drinking water.

承德石油高等专科学校化学工程系，河北承德067000 摘要：通过对0 氧化、活性炭吸附和0 氧化一活性炭吸附工艺的研究，探讨0 一活性炭工艺去除饮用水中少量硝基苯的可行性。

With the depleting of oil resource in the world, the utilization of natural gas resources to useful chemicals has becoming important.

随着世界石油资源的消耗，天然气的化学利用日益提上了日程。

Circulating Fluidized Beds have been fully developed and widely used in chemical, petroleum and coal combus...

气固循环流化床作为一种新型化学反应器已在化工、石油和煤燃烧过程中得到广泛应用。

This raw material, an oil by-product, is inert and unaffected by most chemical agents occurring in daily life.

这种原料，石油副产品，是惰性和不受大多数化学在日常生活中发生的代理商。

In view of the improper matching of the strength-toughness for domestic petroleum drill pipe sub,the influence of the chemical compositions and metallurgical quality of 37CrMoE steel used for drill pipe sub on its mechanical properties,as well as the effect of the metallurgical quality on the hardenability,were analyzed.

针对国产石油钻杆接头存在强韧性配合不良的问题，试验研究了钻杆接头用37CrMoE钢的化学成分和冶金质量对其力学性能的影响，以及冶金质量对淬透性的影响。

Sud-Chemie , a German-owned company whose Chinese headquarters is in Shanghai, has 600 workers in Louisville, producing catalysts used in oil refining, and working on fuel-cell research.

南基化学是一个德国公司，她在中国的总部设在上海。在路易维尔市她拥有600名员工，主要从事石油精练催化剂的制造，以及燃料电池的研究。

Iron and steel, machinery, chemicals, petroleum processing, electronics, mining and textile industries are well developed.

钢铁、机械、化学、石油加工、电子、采矿和纺织等工业都很发达。

Hydrolyzed polyarylamide and Xanthan have been extensively used in enhanced oil recovery .

使用聚合物提高石油采收率是三次采油化学驱中最具有经济价值的一种方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。