In contact with a hot surface, naphtha petroleum fractions crack to produce ethylene and propylene.

Various solvent naphtha fraction generally have to go through refining.

各种溶剂油馏分一般都需要经过精制加工.

The Naphtha Stipper Reboiler duty is not decreased proportionally to the laden methanol to be stripped.

石脑油汽提塔再沸器的负荷不是与被汽提的富甲醇按比例减少.

The article introduces development status of solvent naphtha productive technology both home and abroad.

介绍了国内外溶剂油生产技术的发展现状.

Methods: Apply microwave extraction in determining content of naphtha in Eupatorium Fortune.

方法: 运用微波技术对佩兰中挥发油的含量进行测定.

Solvent naphtha is one of the five broad areas of petroleum products.

溶剂油是五大类石油产品之一.

The copper belt corrosion was caused by H 2 S and active sulfur in naphtha.

证明了铜丝带腐蚀是由石脑油中的H2S和活性硫引起的.

The technical features, process design and commercial application of FDFCC cracked naphtha olefin reduction were described.

FDFCC工艺是降低催化汽油烯烃含量的有效技术.论述了该工艺的技术特点 、 流程设计和工业应用情况.

A marble-sized ball, originally of camphor but now of naphthalene, stored with clothes to repel moths.

用来使蛀虫远离储存的衣服的樟脑或萘的小圆球.

The p dichlorobenzene and naphthalene in mothproofing agent was determined by infrared spectroscopy.

用红外光谱法测定了防蛀剂中对二氯苯和萘的含量.

The development condition and the problems in practice of Naphthalene series superplasticizer were also analysed.

分析了萘系高效减水剂的发展状况及应用中存在的问题.

For production of industrial naphthalene, the Coking Works of Anyang Iron & Steel Group Co.

安钢焦化厂工业萘生产系两炉两塔工艺流程,过程复杂,控制参数多,指标严格.

Dispersants such as lignin type, naphthalene sulfonate-formaldehyde condensates and polycarboxylic acids were introduced.

介绍了木质素类分散剂 、 萘磺酸甲醛缩合物和聚羧酸系分散剂.

The purity of refined naphthalene could be more than 99.5 % by said fractional crystallization process.

通过分级结晶提纯过程,可获得纯度达到99.5%以上的精萘产品.

Oil and Lubricants, Valves, Pipes and Pipe Fittings Naphthalene, Valves, Pipes Fittings Oil and Lubricants.

采购产品油和润滑物, 阀门, 管和管配件, 装阀门, 管配件,油和润滑物.

In fact, camphor and naphthalene balls are different in nature.

事实上, 樟脑和臭丸在性质上是不同的.

The polymer films of naphthalene , including naphthylamine , naphthalene and aminonaphthalenol, were obtained by electrochemical polymerization method.

以电化学方法得到一系列的萘衍生物聚合膜.

The gained achievements have a certain guiding significance for the industrial production of Naphthalene series superplasticizer.

所得成果对萘系高效减水剂的工业生产具有一定的指导意义.

The development of polyethylene naphthalate ( PEN ) and its intermediate 2,6-naphthalene dicarboxylic aicd ( 2,6-NDA ) is reviewed.

叙述了PEN及其中间体2, 6- 萘二甲酸的发展情况.

The amino acids were derivatized with naphthalene _ 2,3 _ dicarboxyaldehyde ( NDA ) to produce electroactive substances.

氨基酸用萘-2,3-二羧醛 ( NDA ) 衍生为电活性物质.

Several production methods, market demand and development of 2-naphthol are introduced in this paper.

本文着重介绍了 2- 萘酚的各种生产工艺及市场需求.