分馏

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 application markets of three kinds of isoolefines(isoprene, cyclopentadiene ,piperylene) from the cracking C5 fractions and their downstream derivatives were reviewed.

着重评述了裂解C5馏分资源中3种异构烯烃(异戊二烯、环戊二烯和间戊二烯)及其下游衍生物的应用市场，并剖析了我国裂解C5资源的利用现状及应用前景。

A polarographic procedure is described for the determination of elemental sulfur in petroleum fractions and products.

提出了采用示波极谱法测定馏分油及石油产品中元素硫的方法。

Even carbon number alkenes, phthalic esters and nitrogen heteroatom-containing components were detected in the elution fractions, while such components were not detected without silica gel column separation, indicating that preseparation is very important for increasing the sensitivity of GC/MS analysis.

各洗脱馏分用GC/MS分析，其可测成分与直接检测相比，多检测出偶碳烯烃、邻苯二甲酸酯类和含氮化合物等，表明合适的预分离对提高GC/MS分析的灵敏度非常重要。

The reaction results of the selective hydrogenation of MethylAcetyleneand Propadiene in C 3 distillate by catalytic distillation were investigated with randomlypacked structure of packingtype catalyst, the combined structure of sieve tray and packingtype catalyst as well as the structure with interlaced packing and ordinary catalyst.

考察了填料状催化剂散装结构、筛板填料状催化剂复合结构、规整填料与普通催化剂交错排列结构等用于C3 馏分中丙炔、丙二烯催化蒸馏选择加氢过程的反应效果，综合考虑催化剂制备的难易、工业装置长周期运转的必要性、传质对反应的影响等因素，推荐在工业装置上采用规整填料与催化剂交错排列结

The possibility is studied for producing bean extractive solvent oil boiling range of 60～90℃with the aromatic raffinate of splitting light-end products.

研究了轻烃裂解的芳烃油余油生产大豆抽提溶剂油（60～90℃馏分）的可能性。

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。