Simulated moving bed device and method for separating multi-component dihydric alcohol

A simulated moving bed, multi-component technology, applied in separation methods, chemical instruments and methods, solid adsorbent liquid separation, etc., can solve the problems of single structure, non-continuous operation, low separation efficiency, etc., and achieve the goal of improving separation efficiency Effect
CN110665256AActive Publication Date: 2020-01-10INST OF PROCESS ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date
2020-01-10

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Abstract

The invention provides a simulated moving bed device and a method for separating a multi-component dihydric alcohol.The simulated moving bed device comprises at least four chromatographic columns filled with adsorbents, each chromatographic column is provided with at least two feeding channels and at least three discharging channels, and the chromatographic columns are connected in series throughconnecting channels; and valves for controlling opening and closing of the channels are arranged on the feeding channels and the discharging channels of the chromatographic columns and on connecting channels between adjacent chromatographic columns. The method comprises the following steps: introducing the multi-component dihydric alcohol into the chromatographic columns of the simulated moving bed device, then introducing a resolving agent for elution, and enabling extracted solutions of different components to flow out from different discharging channels of the chromatographic columns respectively, thereby separating the multi-component dihydric alcohol. According to the simulated moving bed device provided by the invention, different modes can be autonomously selected for separation operation through switching of a pump and the valves, so that different separation requirements are met.
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Description

technical field

[0001] The invention belongs to the technical field of separation of mixed alcohols, and in particular relates to a simulated moving bed device and a method for separating multi-component dihydric alcohols. Background technique

[0002] In the process of coal-to-ethylene glycol, mixed alcohol is the main by-product, and a large amount of low-value utilization results in a large loss of ethylene glycol. Among them, polyols such as ethylene glycol, 1,2-propanediol, 1,2-butanediol, and 2,3-butanediol are widely used in the fields of energy, chemical industry, and materials, and are one of the key chemical products imported by my country. Ethylene glycol is an important bulk petrochemical raw material, which can be used to produce polyester fiber, antifreeze, unsaturated polyester resin, lubricant and other products, and its main by-product - multi-component mixed alcohol is also of great potential for application Chemical Products.

[0003] At present, there a...

Claims

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