A kind of separation method of propylene/propane

A separation method and propane technology, applied in the field of chemical materials, can solve the problems of high energy consumption, difficult separation, and inability to separate propane and propylene
CN111747818BActive Publication Date: 2021-08-20DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2021-08-20

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Abstract

The present application discloses a method for separating propylene / propane, which is characterized in that the separation is adsorption separation; the adsorbent used in the adsorption separation includes modified molecular sieves modified by imidazole compounds. The method described in this application has high selectivity to propylene, and the separation ratio of propylene / propane is as high as 4.3 or more, which reflects the high-efficiency propylene / propane adsorption and separation performance, can realize the effective separation of propylene / propane in pressure swing adsorption, and meets the requirements of industrial pressure swing adsorption Separation of propylene / propane requirements reduces industrial operating costs.
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Description

technical field

[0001] The application relates to a separation method of propylene / propane, which belongs to the field of chemical materials. Background technique

[0002] Propylene is an important petrochemical basic raw material second only to ethylene, and is mainly used to produce chemicals such as polypropylene, acrylonitrile, and propylene oxide. In the past 10 years, driven by the rapid growth of market demand for downstream products, global propylene consumption has increased significantly. Steam cracking co-production of propylene is the main source of global propylene resources, accounting for 2 / 3 of its total output. The propylene produced by steam cracking co-production is based on C 1 -C 4 It exists in the form of low carbon hydrocarbon mixture. Among them, propane is the most important impurity, and its boiling point is only 5°C higher than that of propylene. It is difficult to separate it by conventional low-temperature rectification methods, and the exist...

Claims

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