查询词典 paraffins

The contents of n -paraffins were determined using 5A molecular sieve as absorbent by correction from data of GC.The results were compared with those of GC.

采用分子筛直接吸附再经色谱数据补正的方法，测定液体石蜡的正构烷烃含量，并与气相色谱法的结果对比，其一致性较好。

The research on SCCPs is at infant stage,although China is the largest producer of chlorinated paraffins in the world.

氯化石蜡组成特别复杂，其定量分析面临巨大的挑战，已成为对氯化石蜡环境存在现状、降解途径以及毒性等进一步研究的瓶颈问题。

Short chain chlorinated paraffins are one new kind of extremely complex persistent organic pollutants and have attracted extensive concerns worldwide.

短链氯化石蜡作为一类新型持久性有机污染物已经引起全球的关注，我国是氯化石蜡第一大生产国，但对其研究还处于起步阶段。

ZSM-5 zeolite catalyst is one with selectivity preferring normal paraffins to branched ones.

考察了ZSM-5型分子筛催化剂的择形裂解反应动力学过程。

When these paraffins are used for the manufacture of detergent or plasticizer, the content of aromatics must be reduced to a permissible level.

欲将此蜡用来作为合成洗滌剂、石油酯增塑剂等轻化工产品的原料，就必须设法降低其中的芳香烃含量到允许范围。

Short chain chlorinated paraffins ; persistent organic pollutants; determination method

短链氯化石蜡；持久性有机污染物；分析方法

The low-molecular-weight paraffins and olefins, as found in natural gas and refinery gases, and the simple aromatic hydrocarbons have so far been of the most interest because it is these inpidual species that can readily be isolated and dealt with.

迄今为止，人们最感兴趣的是从天然气和炼厂气中所得到的低分子量石蜡和稀烃，以及简单芳烃，因为这些物质能够进行迅速分离和处理。

Paraffins may be deposited throughout the oil production from the oil well reservoirs up to the storage tanks at the refineries.

可存放贯穿烷烃的石油生产的石油储罐储层在炼油厂。

Separation of straight-chain α-olefins and paraffins from coker gas oil by urea dewaxing was tested in a laboratory.

对尿素脱蜡工艺从焦化柴油中分离直链α-烯烃和直链烷烃的工艺路线进行了试验研究，用异丙醇和水混合溶剂溶解尿素，与焦化柴油进行络合反应。

Making use of the principal advantages of reaction technology in the hydrogenation of plastics, we have, as a specific objective, aimed in our work at a reduction of the reaction parameters such as pressure, temperature, hydrogen consumption, and catalyst application with simultaneous quantitative breakdown of hydrocarbons, containing heteroatoms, to saturated paraffins and plastic monomers as a desired result.

在塑料氢化中充分发挥反应技术的主要特点，我们针对某一特定的目标，在我们的工作减少等压力、温度、耗氢量和催化剂等参数，并同时应用包含杂原子的碳氢化合物的定量分解成饱和烷烃和塑料单体，作为我们期望看到的结果。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐