Pressure swing adsorption method for distilling olefin or ethane from gas mixture

A technology of pressure swing adsorption and mixed gas, applied in the direction of absorption purification/separation, organic chemistry, etc., can solve the problems such as difficult to purify olefins, and achieve the effect of improving purity, enhancing separation effect and strong selectivity
CN1194946CInactive Publication Date: 2005-03-30伍仁兴
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
伍仁兴
Publication Date
2005-03-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

A process for extracting olefin or ethylene from gas mixture by variable-pressure adsorption method features that its adsorption system contains at least two adsorption beds, and includes such steps as adsorbing at 50-300 deg.C, displacing, vacuumizing and raising pressure. The adsorbent in adsorption tower is chosen from silica gel, alumina, activated carbon, molecular sieve, resin, carbon adsorbent and zeolite molecular sieve, etc.
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Description

Technical field:

[0001] The invention relates to a pressure swing adsorption method for separating and purifying gas from a gas mixture, especially a pressure swing adsorption method for separating and purifying olefin or ethylene from a mixed gas containing olefin and alkane. technical background:

[0002] Pressure swing adsorption is a technology for separating and purifying gas from a gas mixture. It is usually a gas phase adsorption process at room temperature. Under high pressure (adsorption pressure), the adsorption capacity of gas components is large, but under low pressure (desorption pressure), the adsorption capacity is small. The alternating switching cycle process consisting of adsorption and desorption is used to realize the separation of gases. The existing pressure swing adsorption process is operated at normal temperature, and the adsorbent has a strong adsorption capacity for olefins and alkanes at room temperature, so it is difficult to achieve the purpose ...

Claims

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