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Method for hydroprocessing coarse isophthalic acid

A technology of hydrogenation treatment and residence time, which is applied in chemical instruments and methods, preparation of carboxylate salts, preparation of organic compounds, etc., can solve the problems of poor hydrogenation effect of crude IA, and improve the effect of hydrogenation treatment, good technology Effect, the effect of good hydrogenation effect

Active Publication Date: 2013-05-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem of poor hydrogenation effect of crude IA in the prior art, and a method for hydrogenation treatment of crude IA is provided, which has the characteristics of good hydrogenation effect

Method used

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  • Method for hydroprocessing coarse isophthalic acid
  • Method for hydroprocessing coarse isophthalic acid
  • Method for hydroprocessing coarse isophthalic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] use as figure 1 The 20.0 L hydrogenation reactor is shown. 5-8 purpose 6000g palladium charcoal catalyst (with coconut shell charcoal as a carrier, in weight percent, palladium content 0.35%) is divided into 6 parts on average, these 6 parts of catalysts are added to catalyst frame 11 through catalyst loading and unloading port 22 respectively ~16, and remove the liquid material inlet 1, emergency discharge port 2, temperature measurement port 3 and gas material inlet 4 related connecting parts, loosen the connecting flange 9 between the reactor top cover 5 and the reactor main body 6 , and remove and open the top cover 5 of the reactor, and then use a long rod with a hook at one end to catch the intersection of the two strips of the matching part 24 of the catalyst frame 16, and hoist the catalyst frame 16 into the reactor At the corresponding position, press down the long rod vertically to make a horizontal displacement away from the position of the intersection, and...

Embodiment 2～8

[0031] The specific implementation process is as in Example 1, only the crude IA feed conditions and hydrogenation reaction conditions are changed, and the crude IA feed conditions, hydrogenation reaction conditions and sample analysis results are shown in Table 1.

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PUM

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Abstract

The invention relates to a method for hydroprocessing coarse isophthalic acid (coarse IA) and mainly solves the problem that hydrogenation is poor in effect in the prior art. Size containing coarse IA is used as reaction raw material and contacts with palladium-carbon catalyst for reaction in the presence of hydrogen to obtain reaction products containing TA, wherein a reactor used is a fixed bed reactor which comprises a reactor top cover (5) and a reactor body (6), the reactor top cover (5) is provided with a liquid material inlet (1) and a gas inlet (4), and the reactor body (6) at least comprises two catalyst frames (from 11 to 16). The problem that hydrogenation is poor in effect in the prior art is solved. The method is applicable to industrial production of coarse IA hydroprocessing.

Description

technical field [0001] The invention relates to a method for hydrogenation treatment of crude isophthalic acid. Background technique [0002] Purified isophthalic acid production process, as the mainstream isophthalic acid (PIA) production process, usually includes an oxidation process and a hydrotreating process, and its production process is as follows: the crude isophthalic acid ( Crude IA) is transported to the hydrogenation reactor through the raw material preparation unit, and the compressed hydrogen gas transported to the hydrogenation reactor is fully contacted with the space above the liquid layer in the hydrogenation reactor after being distributed through the distribution main pipe, and the reaction liquid is reached after the dissolution equilibrium Flow through reaction liquid layer and catalyst bed layer again, and hydrogenation reaction takes place in catalyst bed layer, catalyst bed layer is piled up to form by 5-8 purpose flake palladium charcoal catalyst us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C63/24C07C51/487
Inventor 张海涛畅延青
Owner CHINA PETROLEUM & CHEM CORP
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