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Moving bed system for preparing low-carbon olefin through dehydrogenation of low-carbon alkane

A technology of low-carbon olefins and low-carbon alkanes, applied in the field of moving bed systems, to achieve the effects of good load adjustment operability, improved economic benefits, and optimized product structure

Inactive Publication Date: 2021-03-30
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reactors of the existing moving bed process are controlled in series, and the catalyst and materials flow in parallel. The load of each reactor must match the entire reaction system, and cannot be adjusted individually according to the actual production load and the actual condition of the catalyst in each reactor.

Method used

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  • Moving bed system for preparing low-carbon olefin through dehydrogenation of low-carbon alkane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, the present embodiment is propane dehydrogenated propylene. The material sequentially passes through the raw material pretreatment unit 1, the fuel separation unit 2, the cold tank 8, the material product heat exchanger 9, the moving bed reaction unit 3, the feedstock heat exchanger 9, hydrogen separation unit 4, product purification unit 5, cold box 8. The product separation purification unit 6. The catalyst cycle between the moving bed reaction unit 3 and the catalyst regeneration unit 7.

[0030] The specific operation is as follows, and the raw propane is measured by the fresh raw material flow meter 17, first conveyed to the raw material heater 11, warmed to 40 ° C, and the pressure was controlled at 2.5 to 3.0 MPa. Sequentially by the desulfurization tower 12, a dehydrated protective column 13, a dry tower 14, a dehydrated arsenic protection tower 15, a dephosphorized protective column 16, an inorganic or organic sulfide, alkaline nitride, a...

Embodiment 2

[0033] Such as figure 1 As shown, the present embodiment is isobutylene dehydrogenation. The material sequentially passes through the raw material pretreatment unit 1, the fuel separation unit 2, the cold tank 8, the material product heat exchanger 9, the moving bed reaction unit 3, the feedstock heat exchanger 9, hydrogen separation unit 4, product purification unit 5, cold box 8. The product separation purification unit 6. The catalyst cycle between the moving bed reaction unit 3 and the catalyst regeneration unit 7.

[0034] The specific operation is as follows, and the raw material isobutane is metered from the fresh raw material flowmeter 17, first conveyed to the raw material heater 11, warmed to 40 ° C, and the pressure control is controlled at 2.0 to 2.5 MPa, sequentially through the desulfurization tower 12, demurd protection column 13. , Dry tower 14, dehydration tower 15, dephosphorized protective column 16, inorganic or organic sulfide, basic nitride, alkaline nitride,...

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Abstract

The invention belongs to the technical field of moving bed systems, and particularly relates to a moving bed system for preparing low-carbon olefin through dehydrogenation of low-carbon alkane. According to the technical scheme, the moving bed system for preparing the low-carbon olefin through dehydrogenation of the low-carbon alkane comprises a raw material pretreatment unit, a fuel separation unit, a moving bed reaction unit, a hydrogen separation unit, a product purification unit, a product separation and purification unit and a catalyst regeneration unit which are sequentially connected through pipelines; and the moving bed reaction unit comprises a plurality of reaction pipelines which are arranged in parallel, and a heating furnace and a reactor are arranged on the reaction pipelines. The invention provides the moving bed system for preparing the low-carbon olefin through dehydrogenation of the low-carbon alkane by independently adjusting each reactor.

Description

Technical field [0001] The present invention belongs to the technical field of mobile bed system, and more particularly to a mobile bed system for preparing low-carbon olefins for low alkane dehydrogenation. Background technique [0002] Propylene, isobutylene is an important base chemical raw material. Propylene is mainly used to produce polypropylene, acrylonitrile, propylene oxide, butanol, isopropyl, isobide, etc., is mainly used to produce butyl rubber, high octane gasoline, gasoline additive MTBE. Traditional propylene mainly from steam cracking from the by-products, isobutylene from the refinery gas and lysis of C4 fractions. As the petrochemical industry has increased the demand for propylene and isobutylene, the traditional propylene, isobutylene origin, can not meet the market demand . [0003] In recent years, with the maturity of shale gas mining technology, a large amount of high quality, cheap propane, butane, alkane is directly catalyzed, and the process of prepari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/08C07C5/333C07C7/00C07C11/06C07C11/09
CPCB01J8/08B01J8/082B01J8/085C07C5/333C07C7/005C07C11/06C07C11/09Y02P20/584
Inventor 潘相米韩伟陈鹏李扬艾珍梁衡程牧曦吴砚会李博王华
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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