Vertical type bubbling oxidation reaction device for synthesizing naphthalic acid

An oxidation reaction, naphthalene dicarboxylic acid technology, applied in chemical/physical/physical chemistry fixed reactor, preparation of organic compounds, organic chemistry, etc., can solve the problems of high maintenance cost, high energy consumption, complex equipment, etc. Reliable work, improved yield and purity, and reduced production costs

Inactive Publication Date: 2012-11-21
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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Problems solved by technology

However, the disadvantages of this reactor are also obvious, mainly in two points: one is that the equipment is complex, the maintenance cost is high, especially there is a sealing problem for high temperature and high pressure conditions; the other is that the energy consumption required for stirring is relatively high

Method used

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  • Vertical type bubbling oxidation reaction device for synthesizing naphthalic acid
  • Vertical type bubbling oxidation reaction device for synthesizing naphthalic acid
  • Vertical type bubbling oxidation reaction device for synthesizing naphthalic acid

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Embodiment Construction

[0013] Depend on figure 1 As shown, a vertical bubbling oxidation reaction device for synthesizing naphthalene dicarboxylic acid is mainly composed of a straight cylinder body 1, a top cover 2, a bottom cover 3, a liquid distributor 4, a structured packing 5, a reaction liquid 6, and a gas distributor 7 , feed port 8 and discharge port 9, wherein: the straight cylinder body 1 is a straight cylinder structure with a length of L and an inner wall diameter of D, and the length L of the straight cylinder body 1 should include the length of the rectifying section 11 required for the oxidation reaction , the length of free section 12 and the length H of reaction section 13, the length H of its reaction section 13 should be (60~90)% of straight cylinder body 1 length L, preferably (70~80)%, and H / D= 2~8; The length of the free section 12 between the rectifying section 11 and the reaction section 13 should be (10~20)% of the length L of the straight cylinder body 1; The location of th...

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Abstract

The invention relates to a vertical bubbling oxidation device used for synthesizing naphthalene formic acid, which mainly comprises a cylinder (1), a head cover (2), a bottom cover (3), a liquid distributor (4), a structured packing (5), a reaction liquid (6), a gas distributor (7), a material-inlet (8) and a material-outlet (9); the reaction equipment of which is mainly vertical tubular structure; the top of the vertical tubular structure is provided with the liquid distributor (4), the structure packing (5) and the interior reaction solution(6), and the bottom is provided with the gas distributor (7) composed by ( 4 to 8 ) nozzles (71) evenly distributed from the center of the bottom. The device is provided with a rectifying section (11), a free section (12) and a reaction section (13),and the side of the device is provided with the material-inlet (8) and the material-outlet (9) according to need of the oxidation. The vertical bubbling oxidation device used for synthesizing naphthalene formic acid is simple in structure, convenient in operation, reliable in working, low in cost and simple in application, maintenance and repairing, and does not adopt a mixing device.

Description

technical field [0001] The invention relates to a chemical reaction synthesis equipment, in particular to a vertical bubbling oxidation reaction device for preparing 2,6-naphthalene dicarboxylic acid oxidation product by oxidizing dialkylnaphthalene in liquid phase with oxygen-containing gas. Background technique [0002] At present, the production process of preparing 2,6-naphthalene dicarboxylic acid by oxidation of 2,6-dialkylnaphthalene in foreign countries is similar to the production process of terephthalic acid by oxidation of p-xylene, and both adopt continuous stirring bubble reactor to realize 2 , The liquid-phase oxidation reaction of 6-dialkylnaphthalene has not yet been reported on industrial production in China. A stirred high-pressure reactor is selected as the reactor for the liquid-phase oxidation of 2,6-dialkylnaphthalene because it is conducive to heat transfer and accelerated mass transfer between the gas-liquid two-phase, and is easy to operate. However...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/265C07C63/38B01J19/24
Inventor 靳海波佟泽民郭志武杨索和何广湘
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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