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precipitaion naphtha 沉淀石脑油
Mix pure alcohol and naphtha in a ratio of 3:7. 可以把纯酒精和挥发油以三比七的比例混合.
Objective:To extract and determine naphtha in Eupatorium fortune. 目的:从佩兰中提取挥发油,并测定其含量。
This is made from naphtha which is very good for health. 此物质的主要成分是挥发油，具有很强的保健功效。
Light petroleum distillate, generally known as naphtha, was the logical choice. 轻石油馏分，如石脑油是合乎逻辑的选择。
The copper belt corrosion was caused by H2S 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。
Object:To study the naphtha and fatty acid in Capparis spinosa L.fruit. 目的:为了研究刺山柑果实挥发油和脂肪酸的成分。
Naphtha, petroleum, light steam-cracked arom., piperylene conc., polymd. 名称聚合石脑油与轻蒸汽裂化芳烃和间戊二烯的聚合物;
The precipitaion of recent days has raised the water level almost to the warning line. 连日的降水使这条河流水位直逼警戒水位线。
Domestic gasoline consists of more than 75% high olefin contained FCC naphtha. 我国车用汽油的组成中烯烃含量较高的催化裂化汽油占75%25以上。
Naphtha is the feedstock for both ethylene production and catalytic reforming. 石脑油既是裂解制乙烯的原料，也是重整制备芳烃的原料。
Objective:To extract and determine naphtha in fruit of Cuminum cyminum . 目的:从孜然果实中提取挥发油,并测定其含量。
The paper reviewed the methods of raising sensitivity of flame AAS such as MIBK extraction, ionexchange, precipitaion, online injection, atom trap and indirect determination. 评述了提高火焰原子吸收灵敏度的各种途径 ,诸如包括MIBK -萃取 ,离子交换和沉淀在内的富集分离法 ,在线流动注射法 ,原子捕集法以及间接测定法等技术。
Other feed stocks can include ethane, propane, butane, and light and heavy naphtha but are not commonly used. 其它原材料包括乙烷、丙烷、丁烷以及一般不用的轻、重石脑油。
Other feed stocks, which are less common, can include ethane, propane, butane and light and heavy naphtha. 其它不常用的原材料包括乙烷、丙烷、丁烷以及轻、重石脑油。
Towngas is manufactured in plants at Tai Po and Ma Tau Kok, both using naphtha as a feedstock. 煤气公司位于大埔和马头角的两间厂房，负责生产煤气。
Towngas is manufactured in plants at Tai Po and Ma Tau Kok,both using naphtha as a feedstock. 煤气公司位于大埔和马头角的两间厂房，负责生产煤气。
It is therefore not particularly meaningful to do more than indicating typical throughputs used in naphtha reforming. 因此，除了说明石脑油转化中的典型生产能力外，其他的没有什么特殊意义。
It is designed to take naphtha as well as heavy feedstock such as condensate, the first of its kind in China. 该装置既可以石脑油为原料，又可以较重的原料，如凝析油为原料，这在国内化工史上尚属首例。
It is therefore not particularly meaningful to do more than indicate typical throughputs used in naphtha reforming. 要求很精确的石脑油转化炉的典型能力是没有什么特殊意义的。