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1)  vacuum distillation
真空精馏
1.
The vacuum distillation in the presence of inert gas;
惰气存在下的热敏物料真空精馏
2.
Using high efficient θ reseau filled column, the purification of 2-chloro-5-chloromethyl pyridine was achieved by the method of vacuum distillation.
采用高效θ环填料塔,通过真空精馏的方法精制提纯2-氯-5-氯甲基吡啶粗品,产品纯度达98%以上,瞬时可达99。
3.
7-hydroxy is rectified by vacuum distillation with high efficient packed tower with θ filler,the product purity is over 98.
采用高效θ环填料塔,通过真空精馏的方法精制提纯呋喃酚粗品,产品纯度达98 5%以上,瞬时可达99 99%,最高收率可达70%以上。
2)  vacuum rectification
真空精馏
1.
A new process is proposed for separation of nitrochlorobenzene by using the azeotroepic vacuum rectification method.
提出了采用恒沸真空精馏分离硝基氯苯的新工艺 ,并通过试验确定了合适的恒沸剂和最佳工艺条件 :恒沸剂与原料质量比为 0 。
2.
The process technology of fatty acid by multitower continuous vacuum rectification are discussed in this paper.
本文阐述了脂肪酸多塔连续真空精馏生产工艺的开发及其推广应用情况。
3)  high vacuum distillation
高真空精馏
4)  vacuum batch distillation
真空间歇精馏
1.
The refining process of elemene from oil of Rhizoma Curcuma was studied by vacuum batch distillation.
采用真空间歇精馏方法对从莪术精油提取榄香烯的精制过程进行了研究,得到适宜的工艺条件。
2.
The experimental study for purification of peach aldehyde by vacuum batch distillation,as well as the heat sensitivity of the product,is carried out.
采用真空间歇精馏技术对桃醛原料进行分离试验,考察了桃醛的热敏性,确定了安全的操作温度范围和适宜的操作方法。
5)  high-vacuum rectification
高真空精馏法
1.
The polyunsaturated fatty acid in fish oil was esterified with conventional technology A new technologic process that was by combining the urea clathration and high-vacuum rectification was used to purity the esterified product in order to improve the quality of the product
本文在传统工艺的基础上,对鱼油中的多烯脂肪酸进行酯化,并对其酯化产物的提纯提出新的工艺路线即采用尿素包合法与高真空精馏法相结合的方法,以克服原有工艺中的不足,提高产品质量。
6)  Vacuum packed distillation column
真空填料精馏塔
补充资料:催化精馏
分子式:
CAS号:

性质:有催化剂催化反应和精馏一体化作用。它有两种含义:(1)在相对挥发度很接近但化学性质差异较大的混合液中加入第三种反应剂,使与某一组分发生反应,增大相对挥发度使易于分离;(2)催化反应过程与精馏过程结合,边精馏,边反应,反应与分离一体化,利用精馏过程把反应产物和原料分离,破坏化学反应的平衡关系,使反应继续进行。同时利用反应关系,破坏气液平衡,加快传质分离。若反应放热,还可用来气化物料,节约能耗。如甲醇与含丁烯的气体用阳离子交换树脂催化剂反应,选择性地与异丁烯合成甲基叔丁基醚(MTBE),与其他丁烯异构物分离。

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