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Method for separating alkane and olefin by using simulated moving bed

A technology for simulating moving bed and olefins, applied in adsorption purification/separation, organic chemistry, etc., can solve the problems of large amount of eluent, high cost of eluent, long separation time, etc. cost-effective effect

Pending Publication Date: 2021-07-09
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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  • Method for separating alkane and olefin by using simulated moving bed
  • Method for separating alkane and olefin by using simulated moving bed
  • Method for separating alkane and olefin by using simulated moving bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] In this embodiment, the raw material to be separated is C14 component, and the eluent is C10 paraffin.

[0047] 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.).

[0048] C10 eluent: n-decane. Before alkanes are separated, the eluent is pretreated to remove poisons that may cause adsorption failure (such as oxygen-containing organic compounds, benzene, water, etc.).

[0049] 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.

[0050] The distribution of C14 in the simulated moving bed adsorption tube is as...

Embodiment 2

[0055] In this embodiment, the raw material to be separated is C14 component, and the eluent is C16 alkanes.

[0056] 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.).

[0057] C16 eluent: n-hexadecane. Before alkanes are separated, the eluent is pretreated to remove poisons that may cause adsorption failure (such as oxygen-containing organic compounds, benzene, water, etc.).

[0058] Separation of the C14 feed was performed in a simulated moving bed unit using the C16 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 100°C; the operating pressure is 1Mpa.

[0059] The distribution of C14 in the simulated moving bed adsorption tube is...

Embodiment 3

[0064] In this embodiment, the raw material to be separated is C10 component, and the eluent is C16 alkanes.

[0065] C10 raw material: n-decane 30% (w / w), 1-decene 70% (w / w), before the alkanes are separated, the raw material is pretreated to remove poisons that may cause adsorption failure (such as containing oxygen organic compounds, benzene, water, etc.).

[0066] C16 eluent: n-hexadecane. Before alkanes are separated, the eluent is pretreated to remove poisons that may cause adsorption failure (such as oxygen-containing organic compounds, benzene, water, etc.).

[0067] Separation of the C10 feed was performed in a simulated moving bed unit using a C16 eluent. Operating conditions of the simulated moving bed: the adsorbent adopts molecular sieve adsorbent and modified molecular sieve adsorbent; the operating temperature is 180°C; the operating pressure is 0.5Mpa.

[0068] The distribution of C10 in the simulated moving bed adsorption tube is as follows: Figure 4 shown...

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Abstract

The invention provides a method for separating alkane and olefin by using a simulated moving bed. The method comprises the following steps: eluting by using an eluent, wherein the eluent is n-alkanes, and the difference between the carbon number of the n-alkanes and the carbon number of olefins in a raw material to be separated is greater than 1 and less than 7 (e.g., 2, 3, 4, 5 or 6), preferably greater than 1 and less than 5 (e.g., 2, 3 or 4). The eluent can reduce the cost and improve the product recovery rate.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for separating alkanes and alkenes by using 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 material and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C7/13C07C11/02C07C9/15
CPCC07C7/13C07C11/02C07C9/15
Inventor 钱震张晓龙李俊诚梁颖堃关怀菅青娥武靖为王海国高源刘宏宇
Owner INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD
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