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Tubular catalytic membrane reactor for selective oxygenation of hydrocarbons

A catalytic membrane reactor and selective oxidation technology, applied in the direction of physical/chemical process catalysts, catalyst carriers, chemical instruments and methods, etc., can solve the problems of reducing the selectivity of the target product, low yield of the target product, and accelerating the reaction. Achieve the effects of easy control of reaction temperature, suppression of side reactions, and avoidance of hot spots

Inactive Publication Date: 2003-08-13
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The selective oxidation of hydrocarbons usually uses fixed bed reactors, in addition to fluidized bed reactors, moving bed reactors, etc. These reactors have the following disadvantages: due to the limited heat and mass transfer conditions, it is not conducive to accelerating the reaction, and is prone to side effects. reaction, which reduces the selectivity of the target product, so that the yield of the target product is not high

Method used

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  • Tubular catalytic membrane reactor for selective oxygenation of hydrocarbons
  • Tubular catalytic membrane reactor for selective oxygenation of hydrocarbons
  • Tubular catalytic membrane reactor for selective oxygenation of hydrocarbons

Examples

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Embodiment 1

[0025] Such as figure 1 As shown, the tubular catalytic membrane reactor for the selective oxidation of hydrocarbons of the present invention is composed of an outer tube 2 and an inner tube 1, and the two ends of the inner tube and the outer tube can be connected by sealing gaskets and nuts. In this example, copper gaskets and nuts are used to connect . The inner tube 1 is composed of a microporous metal tube 1(1) welded with a non-porous metal tube 1(2), one end of the inner tube is a purge gas inlet 1(3), and the other end is a product outlet 1(4); the microporous The outer surface of the metal tube 1 (1) is coated with a catalytic film layer 3; the two ends of the outer tube 2 are connected with two gas nozzles 4 and 5.

Embodiment 2

[0026] Embodiment 2: Selective oxidation reaction of isobutylene

[0027] Adopt the tubular catalytic membrane reactor of the hydrocarbon selective oxidation of embodiment 1, its outer pipe diameter is 50 millimeters, thickness 5 millimeters, long 300 millimeters, inner pipe diameter is 20 millimeters, thickness 2 millimeters, length is identical with outer pipe; The metal tube is 100mm long.

[0028] Heteropoly compounds for catalysts, composed of H x Cu 0.2 CrPAs 0.6 Mo 12 o y ; Carrier with Ce 0.5 Zr 0.5 o 2 multiple oxides.

[0029] The preparation of the thin film catalyst adopts the rapid spraying method: first spray the precursor solution of Ce-Zr compound oxide on the porous titanium tube, dry it and bake it at 600°C for 3 hours, repeat it several times, and the coating amount is 0.4g. Then spray the concentrated solution of the heteropoly compound on the porous titanium tube loaded with Ce-Zr compound oxide to form a catalyst thin layer. Catalyst film area i...

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Abstract

The tubular catalytic membrane reactor comprises external tube and internal tube, between external tube and internal tube there is a gap through which air stream can be easily passed. The internal tube s made up by welding imporous metal tube onto both ends of microporous metal tube respectively, and the micropore size of the microporous metal tube is micrometer level, and the external urface of microporous metal tube is coated with catalytic membrane layer. Said invention adopts metal tube as support body, and adopts membrane type catalyst, so that it improves heat-transferring condition, and is favourable for accelerating reaction speed and raising yield of product.

Description

technical field [0001] The invention relates to a chemical reaction device, in particular to a tubular reactor suitable for selective oxidation of hydrocarbons with a thin film catalyst. Background technique [0002] Hydrocarbons, especially low carbon olefins such as propylene (C 3 ＝ ), isobutylene (iC 4 ＝ ), the corresponding aldehydes and acids can be obtained through selective oxidation, alkanes such as n-butane (nC 4 0 ) Selective oxidation can give maleic anhydride. In recent years, due to the low price and abundant sources of low-carbon alkanes, the selective oxidation of propane to acrolein and acrylic acid has also received attention. These aldehydes, acids and anhydrides are basic chemical raw materials and intermediates, and are also important raw materials for the synthesis of polymers. They have many uses. For example, there are more than 100 kinds of chemical products derived from acrylic acid or methacrylic acid, which are widely used in textiles, paint...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J12/00B01J32/00B01J35/10
Inventor 钟邦克张渊明庞先杰杨骏毛萱彭少洪宋瑞琦钟前则
Owner JINAN UNIVERSITY
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