Method and system for preparing propylene by oxidative dehydrogenation of chemical chain propane

A chemical chain propane, oxidative dehydrogenation technology, applied in the field of chemical chain propane oxidative dehydrogenation to prepare propylene, can solve the problems that are not conducive to the safe operation of equipment, complicated production process, lower propylene yield, etc., and achieve the elimination of the limitation of thermodynamic equilibrium , good product quality, and the effect of reducing energy consumption

A chemical chain propane, oxidative dehydrogenation technology, applied in the field of chemical chain propane oxidative dehydrogenation to prepare propylene, can solve the problems that are not conducive to the safe operation of equipment, complicated production process, lower propylene yield, etc., and achieve the elimination of the limitation of thermodynamic equilibrium , good product quality, and the effect of reducing energy consumption

CN107698419BActive Publication Date: 2019-07-30NORTHEASTERN UNIV LIAONING
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  • Method and system for preparing propylene by oxidative dehydrogenation of chemical chain propane

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Embodiment 1

[0030] refer to figure 1 , this embodiment provides a system for preparing propylene by oxidative dehydrogenation of chemical chain propane, the system includes a dehydrogenation reactor 3, a mixed gas purification device, a mixed gas separation device 13, an oxidation reactor 1, a mixed gas heat exchanger 9, Mixed gas waste heat boiler 10 , oxygen-lean gas heat exchanger 5 , oxygen-lean gas waste heat boiler 6 , oxygen-lean gas dust collector 7 , separation equipment 2 , hopper 8 , COx gas storage 15 and propylene storage 14 .

[0031] The dehydrogenation reactor 3 can receive propane and oxygen carrier particles, and provide propane and oxygen carrier particles to react therein at high temperature to generate propylene, water vapor, COx gas and oxygen carrier particles after oxygen loss, COx gas As a by-product of the reaction of propane with oxygen carrier particles. The propylene and water vapor generated by the oxidative dehydrogenation reaction and the water vapor and C...

Embodiment 2

[0081] This embodiment provides a method for preparing propylene by oxidative dehydrogenation of chemically chained propane. The method uses the system of the above-mentioned embodiment 1 and includes the following steps:

[0082] S1. Pass propane into the dehydrogenation reactor 3, and a part of propane and oxygen carrier particles undergo oxidative dehydrogenation reaction at high temperature (preferably 300-700°C) to generate propylene, water vapor and oxygen carrier after deoxygenation Granules, another part of propane in the dehydrogenation reactor 3 undergoes a deep oxidation reaction at high temperature to generate water vapor and COx gas. The mixed gas containing propylene and water vapor generated by the oxidative dehydrogenation reaction, water vapor and COx gas generated by the deep oxidation reaction, and incompletely reacted propane, and the oxygen carrier particles after deoxygenation are output from the dehydrogenation reactor 3 respectively To the mixed gas hea...

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Abstract

The invention relates to a method and system for preparing propylene through oxidative dehydrogenation of chemical chain propane. The method includes the following steps: propane reacts with oxygen carrier particles in a dehydrogenation reactor to generate propylene, water vapor and COx gas, and the oxygen carrier particles lose oxygen; separate propylene from the mixed gas; carry oxygen after oxygen loss The bulk particles undergo an oxidation reaction with the oxygen-containing gas to generate oxygen-poor gas and regenerated oxygen carrier particles. The regenerated oxygen carrier particles are circulated to participate in dehydrogenation. The system includes a dehydrogenation reactor, mixed gas purification equipment, mixed gas separation equipment, and an oxidation reactor. The dehydrogenation reactor can receive oxygen carrier particles generated in the oxidation reactor. The method and system for preparing propylene through oxidative dehydrogenation of chemical chain propane are highly efficient, energy-saving, environmentally friendly, economical and safe.

Description

technical field [0001] The invention relates to a method and system for preparing propylene by oxidative dehydrogenation of chemical chain propane. Background technique [0002] Propylene is an important basic raw material for chemical synthesis and plays an important role in the petrochemical industry. It is mainly used to synthesize other important chemical products such as polypropylene, acrylonitrile and acrylic acid. At present, 80% of the world's propylene comes from steam cracking or catalytic cracking (FCC) of naphtha and heavy crude oil, but these two processes mainly produce ethylene and refined oil, and propylene is only a by-product. form, so the production of propylene is severely limited. In recent years, with the rapid increase in the consumption of downstream derivatives of propylene, the demand for propylene has continued to rise, and the contradiction between supply and demand has become increasingly obvious. [0003] In order to increase the production o...

Claims

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Application Information

Patent Timeline
30 Jul 2019
Publication
CN107698419B
IPC
C07C5/48; C07C11/06
CPC
C07C5/48; C07C11/06; Y02P20/10; Y02P20/50
Inventors
于庆波; 吴天威