馏分

The fraction between the temperature range of 130℃ and 160℃ wascollected and the levulinic concentration was 98%.

洗脱液经浓缩后，在0.00266MPa下精馏，收集130℃-160℃的馏分，最终得到乙酰丙酸的纯度为98％。

The test results showed that this synthetic kerosene fraction was mainly composed of paraffinic hydrocarbons and monocyclic naphthenic hydrocarbons, besides, only a minor amount of single-ring aromatic hydrocarbons was found, two-ring or three-ring aromatic hydrocarbons were non-detectable.

结果表明，从国产煤F-T合成燃料中截取的煤油馏分主要由链烷烃和一环环烷烃组成，油样中只含有极少的单环芳烃，没有双环和三环芳烃存在。

Noncondensible gas(7%～33%,consisting of CO,CO2,H2 and C1-C2 hydrocarbons),liquid(water and oil phases,26%～45%)and solid residues(31%～51%)were collected after microwave heating of waste PCB.

结果显示：微波热解得到的气体、液体、固体的产率分别为7%～33%、26%～45%、31%～51%，其中气体主要由CO、CO2、H2及有机烃类组成，可燃性气体占70%左右，可作为燃料气加以利用；液体分为水相及油相，经常压蒸馏后得到的120～250℃馏分主要为单酚化合物，苯酚高达50%左右，甲基苯酚和邻甲基苯酚为25%以上，是良好的化工原料；固体中除炭外，还含有许多金属如铅、锡和铜等，可以回收利用。

Normally refined vacuum distillates of paraffinic Nanyang crude oil are used as base stocks and are packaged with composite additives.

这种两用油以南阳原油正常精制的减压馏分油为基础油，以一定的比例调合，并添加适量的复合添加剂而成。

Selective hydrogenation for pentadiene in FCC C 5 fractions and hydroetherification of tertiary pentanes with methanol were investigated.

采用离子交换法制备了Pd/D0 0 5树脂催化剂，对催化裂化C5 馏分中戊二烯的选择性加氢和叔戊烯与甲醇的临氢醚化反应进行了研究。

A Pd /D005 resin catalyst was prepared by using ion exchangemethod.Selective hydrogenation for pentadiene in FCC C5 fractions and hydroetherification of tertiary pentanes with methanol were investigated.

采用离子交换法制备了Pd/D005树脂催化剂，对催化裂化C5馏分中戊二烯的选择性加氢和叔戊烯与甲醇的临氢醚化反应进行了研究。

A Pd /D005 resin catalyst was prepared by using ion exchange method.Selective hydrogenation for pentadiene in FCC C5 fractions and hydroetherification of tertiary pentanes with methanol were investigated.

摘 要：采用离子交换法制备了Pd/D005树脂催化剂，对催化裂化C5馏分中戊二烯的选择性加氢和叔戊烯与甲醇的临氢醚化反应进行了研究。

A method is provided for manufacturing cleaner fuels, in which NPC, naturally existing in small quantities within various petrolic hydrocarbon fractions, are removed from the petrolic hydrocarbon fractions ranging, in boiling point, from 110 to 560 DEG C and preferably from 200 to 400 DEG C, in advance of catalytic hydroprocessing.

提供了一种生产清洁燃料的方法。该方法是在催化加氢处理之前，从沸点在110―560℃，较好在200―400℃范围的石油原料馏分中除去以少量存在的天然极性化合物。

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。

A piperylene based petroleum resin was modified by the monoolefin fraction from C_5 separation unit.

采用 C5分离装置得到的 C5单烯烃馏分对间戊二烯石油树脂进行改性。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。