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Method for separating 1-olefin from isoolefine by utilizing fixed bed pulse adsorption

A technology of isomerized olefins and fixed bed, applied in the field of separation, can solve problems such as complex process, high energy consumption, and harsh conditions, and achieve the effect of simple separation technology, good regeneration performance, and high selectivity

Pending Publication Date: 2020-12-25
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

[0009] 1. Low yield of target product;
[0010] 2. The process is complicated and the energy consumption is high;
[0011] 3. The conditions of the isomerization method are relatively harsh, and the properties of the catalyst are unstable
The existence of this heterogeneous method is relatively harsh

Method used

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  • Method for separating 1-olefin from isoolefine by utilizing fixed bed pulse adsorption
  • Method for separating 1-olefin from isoolefine by utilizing fixed bed pulse adsorption
  • Method for separating 1-olefin from isoolefine by utilizing fixed bed pulse adsorption

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The experimental steps are as follows:

[0053] 1. Filling of the adsorbent: The adsorption tube is purged under nitrogen heating to prepare for the filling of the adsorbent. According to the length and inner diameter of the adsorption tube, the influence of back-mixing was excluded. Add 55 ml of 13X type adsorbent. (Particle size has ruled out the effect of channeling on separation.)

[0054]2. Calibration of the flow pump: select 1-hexene to calibrate the flow pump: set the pump flow to 1.000ml / min, the actual fluid flow: 0.98ml / min.

[0055] 3. Pump in the desorption liquid: pump in the desorption liquid under the actual flow rate until there are no abnormalities such as continuous dripping, air bubbles, and no liquid coming out of the sampling port.

[0056] 4. Sampling pulse solution: According to the separation factor and the adsorption capacity of the adsorbent for the two isomeric olefins, the sampling time is determined to be 2.5 minutes.

[0057] 5. Inject...

Embodiment 2

[0062] 1. Filling of the adsorbent: The adsorption tube is purged under nitrogen heating to prepare for the filling of the adsorbent. According to the length and inner diameter of the adsorption tube, the influence of back-mixing was excluded. Add 55 ml of adsorbent type 5A. (Particle size has ruled out the effect of channeling on separation.)

[0063] 2. Calibration of the flow pump: select 1-hexene to calibrate the flow pump: set the pump flow to 1.000ml / min, the actual fluid flow: 0.98ml / min.

[0064] 3. Pump in the desorption liquid: pump in the desorption liquid under the actual flow rate until there are no abnormalities such as continuous dripping, air bubbles, and no liquid coming out of the sampling port.

[0065] 4. Sampling pulse solution: According to the separation factor and the adsorption capacity of the adsorbent for the two isomeric olefins, the sampling time is determined to be 2.5 minutes.

[0066] 5. Injection of desorption liquid: after switching to deso...

Embodiment 3

[0071] The experimental steps are as follows:

[0072] 1. Filling of the adsorbent: The adsorption tube is purged under nitrogen heating to prepare for the filling of the adsorbent. According to the length and inner diameter of the adsorption tube, the influence of back-mixing was excluded. Add 55 ml of adsorbent type 5A. (Particle size has ruled out the effect of channeling on separation.)

[0073] 2. Calibration of the flow pump: select 1-hexene to calibrate the flow pump: set the pump flow to 1.000ml / min, the actual fluid flow: 0.98ml / min.

[0074] 3. Pump in the desorption liquid: pump in the desorption liquid under the actual flow rate until there are no abnormalities such as continuous dripping, air bubbles, and no liquid coming out of the sampling port.

[0075] 4. Sampling pulse solution: According to the separation factor and the adsorption capacity of the adsorbent for the two isomeric olefins, the sampling time is determined to be 2.5 minutes.

[0076] 5. Inject...

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Abstract

The invention provides a method for separating 1-olefin from isoolefine by utilizing fixed bed pulse adsorption. The method comprises the following steps of: activating and drying an adsorbent, and filling an adsorption tube with the adsorbent; pumping a desorption solution; performing sample introduction; and performing sample introduction on the desorption solution, thereby obtaining the separated 1-olefin, wherein the adsorbent is a 13X molecular sieve or a 5A molecular sieve; the desorption solution is a mixture of alkane and olefin, and the difference between the carbon atom number of thealkane and olefin and the carbon atom number of the to-be-separated 1-olefin is 1-3; and the operating temperature is 25-35 DEG C the method disclosed by the invention has high selectivity and stability.

Description

technical field [0001] The invention belongs to the technical field of separation, and in particular relates to a method for separating 1-alkenes from isomeric alkenes by using fixed-bed pulse adsorption. Background technique [0002] Fischer-Tropsch synthesis (Fischer-Tropsch synthesis) is one of the indirect coal liquefaction technologies, which can be referred to as FT reaction for short. It uses synthesis gas (CO and H2) as raw material to synthesize paraffin wax under catalyst (mainly iron system) and appropriate reaction conditions. Hydrocarbon-based liquid fuel process. The reaction crude products are mainly light oil, heavy oil and heavy wax. Among them, the main substances in light oil are normal alkanes and normal olefins, and the olefin components are mostly α-olefins. If appropriate methods can be used to separate the required α-olefin components from the product to further produce high-value products, the economic benefits of the process will be greatly improv...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/16B01D15/08C07C7/13C10G25/03
CPCG01N30/02G01N30/06G01N30/16B01D15/08C07C7/13C10G25/03G01N2030/065C07C11/02C07C11/107
Inventor 钱震关怀李俊诚邬学霆菅青娥张晓龙高源陈浩庭武靖为王海国
Owner INNER MONGOLIA YITAI COAL BASED NEW MATERIALS RES INST CO LTD