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Eluent and method for simulating moving bed separation of alkanes and olefins

A technology for simulating moving bed and eluent, which is applied in the direction of adsorption purification/separation, organic chemistry, etc., can solve the problems of large amount of eluent, high cost of eluent, low device efficiency, etc., and achieve improved olefin yield, Wide range of applications and the effect of reducing energy consumption of the device

Pending Publication Date: 2021-02-09
INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Olefin as eluent has the disadvantages of desorption too fast, low yield due to entrainment of olefin in residual liquid, and high cost of eluent
As the eluent, cycloalkane has the disadvantages of slow desorption, long separation time, low device efficiency and large amount of eluent

Method used

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  • Eluent and method for simulating moving bed separation of alkanes and olefins
  • Eluent and method for simulating moving bed separation of alkanes and olefins
  • Eluent and method for simulating moving bed separation of alkanes and olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In this embodiment, the raw material to be separated is C14 component, and the eluent is C10 α-olefin and normal paraffin.

[0045] C14 raw materials: n-tetradecane 30% (w / w), 1-tetradecene 70% (w / w), before the alkanes are separated, the raw materials are pretreated to remove poisons that may cause adsorption failure ( such as oxygenated organic compounds, benzene, water, etc.).

[0046] C10 eluent: n-decane 70% (w / w), 1-decene 30% (w / w), before separation of alkanes, the eluent should be pretreated to remove substances that may cause adsorption failure Poisons (such as oxygenated organic compounds, benzene, water, etc.).

[0047] Separation of the C14 feed was performed in a simulated moving bed unit using the C10 eluent. Operating conditions of the simulated moving bed: molecular sieve adsorbents and not limited to modified molecular sieve adsorbents are used as the adsorbent; the operating temperature is 250°C; the operating pressure is 2Mpa.

[0048] The distrib...

Embodiment 2

[0053] The raw materials to be separated in this example are C14 components, and the eluents are C10 α-olefins and n-paraffins.

[0054] C14 raw material: n-tetradecane 30% (w / w), 1-tetradecene 70% (w / w), before the separation of alkene, the raw material is pretreated to remove the poisons that may cause adsorption failure ( such as oxygenated organic compounds, benzene, water, etc.).

[0055] C10 eluent: n-decane 99% (w / w), 1-decene 1% (w / w), before the separation of alkene, the eluent is pretreated to remove those that may cause adsorption failure Poisons (eg oxygenated organic compounds, benzene, water, etc.).

[0056] The separation of the C14 feed was performed in a simulated moving bed apparatus using the C10 eluent. Simulated moving bed operating conditions: the adsorbent adopts molecular sieve adsorbent and modified molecular sieve adsorbent not limited to this; the operating temperature is 150°C; the operating pressure is 1.5Mpa.

[0057] The distribution of C14 in...

Embodiment 3

[0062] The raw materials to be separated in this example are C14 components, and the eluents are C10 α-olefins and n-paraffins.

[0063] C14 raw material: n-tetradecane 30% (w / w), 1-tetradecene 70% (w / w), before the separation of alkene, the raw material is pretreated to remove the poisons that may cause adsorption failure ( such as oxygenated organic compounds, benzene, water, etc.).

[0064] C10 eluent: n-decane 1% (w / w), 1-decene 99% (w / w), before the separation of alkenes, the eluent is pretreated to remove those that may lead to adsorption failure. Poisons (eg oxygenated organic compounds, benzene, water, etc.).

[0065] The separation of the C14 feed was performed in a simulated moving bed apparatus using the C10 eluent. Simulated moving bed operating conditions: Molecular sieve adsorbents and modified molecular sieve adsorbents not limited thereto are used as adsorbents; the operating temperature is 100°C; the operating pressure is 1Mpa.

[0066] The distribution of ...

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Abstract

The invention discloses an eluent and a method for simulating moving bed separation of alkanes and olefins, the eluent comprising alpha alkenes and n-alkanes, the carbon number of the alpha alkenes and the n-alkanes are different from the carbon number of the alkenes to be separated, the carbon number of the alpha alkenes and the carbon number of the n-alkanes are the same or different. Accordingto the method, the olefin yield can be effectively improved, and meanwhile, the eluent cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to an eluent and a method for separating alkanes and alkenes in a simulated moving bed. Background technique [0002] Simulated moving bed is a mass transfer equipment that utilizes the principle of adsorption for liquid separation. It operates in countercurrent continuous mode, and by changing the position of the material inlet and outlet of the fixed bed adsorption equipment, it produces an effect equivalent to the continuous downward movement of the adsorbent and the continuous upward movement of the material. According to the different adsorption capacity of different components in the material on the adsorbent, the separation of different components in the material is realized, such as figure 1 shown. [0003] It is known that an α-olefin refers to a monoolefin having a double bond at the end of the molecular chain. It is an important chemical raw mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/12C07C11/02C07C9/14
CPCC07C7/12C07C11/02C07C9/14
Inventor 张晓龙钱震李俊诚邬学霆菅青娥关怀武靖为高源陈浩庭王海国
Owner INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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