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Method for hydrotreating crude terephthalic acid

A hydrotreating and catalyst technology, which is applied in chemical instruments and methods, carboxylate preparation, chemical/physical processes, etc., can solve problems such as poor hydrogenation effect of crude TA, and achieve improved hydrotreating effect and good technical effect. , the effect of improving the contact 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 crude TA hydrogenation effect in the prior art, and a method for crude TA hydrogenation treatment is provided, which has the characteristics of good hydrogenation treatment effect

Method used

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  • Method for hydrotreating crude terephthalic acid
  • Method for hydrotreating crude terephthalic acid
  • Method for hydrotreating crude terephthalic 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 TA feed conditions and hydrogenation reaction conditions are changed, and the crude TA feed conditions, hydrogenation reaction conditions and sample analysis results are shown in Table 1.

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Abstract

The invention relates to a method for hydrotreating crude terephthalic acid (TA), and the method is mainly used for solving a problem of poor hydrogenation effect of the prior art. The method adopts a technical scheme that slurry containing crude TA is taken as a reaction raw material and reacts with a palladium-carbon catalyst in the presence of hydrogen so as to obtain a reaction product containing TA after the hydrotreating; and a stationary bed reactor is utilized as a reactor and comprises a reactor top cover (5) and a reactor main body (6), wherein the reactor top cover (5) is provided with a liquid material feed port (1) and a gas feed port (4), and the reactor main body (6) comprises at least two catalyst frames (11-16). The method can be utilized for better solving the problem and used for the industrial production of crude TA hydrotreating.

Description

technical field [0001] The invention relates to a method for hydrogenation treatment of crude terephthalic acid. Background technique [0002] Purified terephthalic acid production process, as the mainstream terephthalic acid (PTA) production process, usually includes an oxidation process and a hydrotreating process. The production process is as follows: the crude terephthalic acid ( Crude TA) is transported to the hydrogenation reactor through the raw material preparation unit, and after being distributed through the distribution main pipe, the compressed hydrogen gas transported to the hydrogenation reactor is fully contacted in the space above the liquid layer in the hydrogenation reactor, 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 usu...

Claims

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Application Information

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IPC IPC(8): C07C63/26C07C51/487B01J8/04
Inventor 张海涛畅延青
Owner CHINA PETROLEUM & CHEM CORP