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System and method for recycling mother solution of purify terephthalic acid and catalyst purifying regeneration

A technology for recovery of purified terephthalic acid and mother liquor, applied in catalyst activation/preparation, separation/purification of carboxylic acid compounds, chemical instruments and methods, etc.

Inactive Publication Date: 2011-04-27
美琪玛国际股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This situation will cause a burden on the downstream water treatment equipment

Method used

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  • System and method for recycling mother solution of purify terephthalic acid and catalyst purifying regeneration
  • System and method for recycling mother solution of purify terephthalic acid and catalyst purifying regeneration
  • System and method for recycling mother solution of purify terephthalic acid and catalyst purifying regeneration

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Embodiment Construction

[0035] Please refer to Fig. 1, the production method of Purify Terephthalic Acid (PTA) is to use p-xylene (PX) as raw material, after oxidation reaction process 20 and hydrogenation (purification) reaction process 30, the purity is above 99.95%. Purified terephthalic acid (PTA) white powder.

[0036] In the oxidation reaction process 20, an oxidation catalyst containing cobalt, manganese, and bromide ions needs to be added, and divalent cobalt and manganese ions are used as catalysts, and bromide ions are used as starters; at the same time, the main reaction is to blow air (Air) into the oxidation process. In the reactor, mix with p-xylene, catalyzer, acetic acid (HAc), this mixed solution is at 16.5kg / cm 2 G pressure and 204 ° C oxidation reaction to produce crude terephthalic acid (CTA).

[0037] The crude terephthalic acid (CTA) residue is recovered through a crude terephthalic acid (CTA) residue system 40 and made into metal salts.

[0038] In the hydrogenation reaction ...

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Abstract

The invention provides a mutterlauge recycling and catalyst purifying and regenerating system for pure terephthalic acid (PTA) and the relative method thereof. The method aims at recycling the pure terephthalic acid mutterlauge produced in the process of purifying the pure terephthalic acid (PTA), thereby leading inorganic acid solution to contain no cobalt, purifying the regenerating system with the catalyst, purifying the regenerating system with the cobalt to electrolyze out the cobalt metal, oxidating the catalyst making system to acquire oxidized catalyst, and recirculating to the production process of the pure terephthalic acid (PTA).

Description

technical field [0001] The present invention relates to a Purify Terephthalic Acid (Purify Terephthalic Acid) mother liquor recovery and catalyst purification and regeneration system and method, which is applied in the process of Purify Terephthalic Acid (PTA), especially a kind of Purify Terephthalic Acid (PTA) Purified terephthalic acid (PTA) mother liquor produced by the hydrogenation reaction in the production process uses a cation exchange resin to absorb cobalt ions in the mother liquor and replaces all the cobalt ions adsorbed by the resin with an inorganic acid into a cobalt-containing inorganic acid solution recovery system and method , and a system and method for producing cobalt metal through a catalyst purification and regeneration system and then producing an oxidation catalyst. Background technique [0002] Purify Terephthalic Acid (Purify Terephthalic Acid) production method uses p-xylene (PX) as a raw material, and after oxidation reaction process and hydroge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C63/26C07C51/47B01J37/34B01J23/75
CPCY02P20/52Y02P20/584
Inventor 严隆财
Owner 美琪玛国际股份有限公司
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