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Membrane reactor for use in hydrocarbon oxidization reaction-separation coupling process

A technology of oxidation reaction and membrane reactor, which is applied in the direction of oxidation reaction preparation, hydrocarbon oxidation preparation of oxygenated compounds, chemical/physical processes, etc. It can solve the problems of low conversion rate of raw materials, excessive oxidation formation, and low selectivity of target products. To achieve the effect of improving selectivity, reducing the generation of by-products and reducing energy consumption

Inactive Publication Date: 2010-10-20
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of membrane reactor overcomes the shortcomings of traditional hydrocarbon oxidation reaction equipment, such as low conversion rate of raw materials, low selectivity of target products, and oxidation products are easy to over-oxidize to form a series of by-products. Separation improves the selectivity of the reaction, reduces the generation of by-products, and reduces energy consumption compared to traditional distillation

Method used

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  • Membrane reactor for use in hydrocarbon oxidization reaction-separation coupling process
  • Membrane reactor for use in hydrocarbon oxidization reaction-separation coupling process
  • Membrane reactor for use in hydrocarbon oxidization reaction-separation coupling process

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The structure of the membrane reactor is to make the finished inorganic ceramic microfiltration membrane tube into a fiber bundle and install it in a pressure-resistant steel shell. The two ends of the membrane tube are supported by porous polytetrafluoroethylene plates. Both the body junction and the junction with the membrane tube are sealed with resin casting. The structure of the membrane tube (see figure 1 ) is an inorganic ceramic microfiltration membrane tube, and the micropores are filled with a polymer membrane material with the performance of selectively separating cyclohexane / cyclohexanol (ketone) mixtures. The catalyst for heaping cyclohexane oxidation reaction in the tube is specifically a nano-gold molecular sieve catalyst. Inorganic ceramic microfiltration membrane tube, the filling method of microporous polymer is as follows:

[0022] Fill the inorganic ceramic microfiltration membrane tube with a certain concentration of polymer solution, let the poly...

Embodiment 2

[0029] as attached image 3As shown, with feed liquid pump 15, 4L hexanaphthene is pumped into the raw material still 18 that effective volume is 5L, and the oxygen that comes in from oxygen pump 14 passes gas sparger 17 with hexanaphthene in the raw material with the amount of 1.5L / min. Bubbling and mixing in the kettle, the heating jacket 16 heats the raw material liquid to 150°C, the flow rate of the raw material liquid is controlled to 10m / s, the pressure is 1MPa, and the liquid distributor 24 at the feed end of the membrane reactor 22 enters the inorganic ceramic microfiltration tube for oxidation reaction , the vacuum pump 21 is used outside the tube to maintain the pressure in the shell of the membrane reactor at about 200 Pa, and the liquid mixture in the tube is driven by the component vapor partial pressure difference, utilizing the dissolution and diffusion speed of the component through the separation membrane material If it is different, the partially oxidized pro...

Embodiment 3

[0031] as attached image 3 As shown, with feed liquid pump 15, 4L hexanaphthene is pumped into the raw material still 18 that effective volume is 5L, and the oxygen that comes in from oxygen pump 14 passes gas sparger 17 with hexanaphthene in the raw material with the amount of 1.5L / min. Bubble mixing in the kettle, heating jacket 16 to heat the raw material liquid to 140°C, control the flow rate of the raw material liquid to 15m / s, the pressure to 0.6MPa, and enter the inorganic ceramic microfiltration tube through the liquid distributor 24 at the feed end of the membrane reactor 22 for oxidation Reaction, the vacuum pump 21 is used outside the tube to maintain the pressure in the shell of the membrane reactor at about 200Pa, and the liquid mixture in the tube is driven by the partial pressure difference of the component vapor, and the dissolution and diffusion speed of the component through the separation membrane material is utilized. Part of the oxidation product will ent...

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Abstract

The invention discloses a membrane reactor for use in a hydrocarbon oxidization reaction-separation coupling process, which comprises a shell, a membrane pipe and supporting plates, wherein the supporting plates are arranged in and at the two ends of the shell; the membrane pipe is formed into a fiber bundle shape; and the two ends of the membrane pipe are fixed on the supporting plates. The membrane reactor overcomes the drawbacks of low raw material conversion rate, low target product selectivity and series byproducts generated by easy over oxidation of oxides, of the traditional hydrocarbon oxidization reaction equipment. As oxides are separate out during oxidization reactions in time, the membrane improves the selectivity of the reactions, reduces byproducts and, compared with the traditional distillation, reduces energy consumption.

Description

technical field [0001] The invention relates to a membrane reactor used for hydrocarbon oxidation reaction-separation coupling process. Background technique [0002] Liquid-phase oxidation of hydrocarbons is a common production method in the chemical industry and plays an important role in the petrochemical industry. The hydrocarbon oxidation reaction is a typical autoxidative free radical chain reaction. This slow-developing unstable chain reaction and the unstable auto-acceleration characteristics of the development process make the liquid-phase oxidation reaction of hydrocarbons generally have a long reaction induction period. , slow speed, low conversion rate of raw materials, low selectivity of target products, easy over-oxidation of oxidation products to generate a series of by-products and other defects, the separation of target products mostly adopts traditional unit operations such as extraction, rectification, and distillation, which consumes The energy is large, ...

Claims

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Application Information

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IPC IPC(8): B01J8/06C07C27/12C07C35/08C07C29/50C07C49/403C07C45/33
Inventor 赵虹曾楚怡黄敏王涛
Owner XIANGTAN UNIV
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