head fraction,first cut,starting fractionation是什么意思

用法例句

The initial distillation of coal tar,the utilization and processing of pitch and the deep processing of coking products were discussed and pertinent suggestions were offered based on the characteristics of high temperature coal tar.

根据高温煤焦油的组成特点,对煤焦油的初馏、沥青加工利用和煤焦油产品的深加工技术进行了探讨,提出一些建议。

Improvements on the process of light benzol forerunning are described in this paper, Practice shows that these improvements are successful.

介绍轻苯初馏工艺的生产改进。

As Lanzhou Petrochemical Company′s 5Mt/a atmospheric-vacuum distillation unit starts to switch away from heavy to light crude oil,the pressure at the top of the primary tower has reached the upper limit of 0.

0Mt/a常减压装置初馏塔塔顶压力达到负荷上限(0。

This project forced on resolve the measure of the Initial boiling point、10%～90% distillation temperature、Final boiling point and the distillation rate problem.

本设计重点解决初馏点、10%~90%馏出温度、干点测量以及油体馏出速度控制两大问题。