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Recovery method for organic amine in polyphenylene oxide copper-amine complex catalyst

A recovery method and technology of organic amines, applied in the purification/separation of amino compounds, etc., to achieve the effect of reducing production unit consumption and improving recycling rate

Inactive Publication Date: 2012-07-04
CHINA NAT BLUESTAR (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the patented method of directly reclaiming the raw materials described in the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The main components of the raw materials to be treated include: 50% by weight of morpholine, 15% by weight of methanol, 20% by weight of toluene, and the rest are copper ions, water and oligomers.

[0028] First, preheat the raw material to 140°C, and quickly transfer it to the flash tank. The pressure of the flash tank is 1000Pa. Most of the organic components such as morpholine, methanol, toluene contained in the raw material are evaporated, and cooled to the bubble point temperature. After left and right, it is used as the rich gas feed of the absorption tower and enters the lower part of the absorption tower.

[0029] The absorption operation adopts a glass absorption tower with a height-to-diameter ratio of 30, which is filled with metal Raschig ring packing, and the top is connected to a condensing system and a vacuum pump. The liquid phase morpholine as absorbent enters from the upper part of the absorption tower. The two are reversely and fully contacted in the...

Embodiment 2

[0033] The main components of the raw materials to be treated include: 45% pyridine, 20% ethanol, 25% toluene, and the rest are copper ions, water and oligomers.

[0034] First, preheat the raw material to 118°C, and quickly transfer it to the flash tank. The pressure of the flash tank is 100Pa. Most of the organic components such as pyridine, ethanol, toluene contained in the raw material are evaporated, and cooled to about the bubble point temperature. Finally, as the rich gas feed of the absorption tower, it enters the lower part of the absorption tower.

[0035] The absorption operation adopts a glass absorption tower with a height-to-diameter ratio of 20, which is filled with metal Raschig ring packing, and the top is connected to a condensing system and a vacuum pump. Pyridine as absorbent enters from the upper part of the absorption tower. The two are reversely and fully contacted in the absorption tower, and the mass flow rate ratio of the gas-liquid two-phase is 2. ...

Embodiment 3

[0039] The main components of the raw materials to be treated include: 45% by weight of morpholine, 20% by weight of methanol, 20% by weight of toluene, and the rest are copper ions, water and oligomers.

[0040] First, preheat the raw material to 138°C, and quickly transfer it to the flash tank. The pressure of the flash tank is 5000Pa. Most of the organic components such as morpholine, methanol, and toluene contained in the raw material are evaporated, and cooled to the bubble point temperature. After left and right, it is used as the rich gas feed of the absorption tower and enters the lower part of the absorption tower.

[0041] The absorption operation adopts a glass absorption tower with a height-to-diameter ratio of 50, which is filled with metal Raschig ring packing, and the top is connected to a condensing system and a vacuum pump. The liquid phase morpholine as absorbent enters from the upper part of the absorption tower. The two are reversely and fully contacted in...

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PUM

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Abstract

The invention discloses a method for reclaiming organic amino in polyphenyl ether copper-amino complex catalyst. The method comprises the following steps: a. a raw material mixture in which total polyphenyl ether powdery material is removed and most of a solvent is transferred to a flash tank; b. a material obtained through flash evaporation enters an absorption tower from the lower part of the absorption tower; pure organic amino is added into the upper part of the absorption tower and is used as an absorbent; through absorption, a material rich in the organic amino is extracted out from thebottom of the tower; and c. the material which is rich in the organic amino and is extracted out from the bottom of the absorption tower is transferred to a rear flash tank, and is subjected to flashevaporation to obtain the organic amino. The reclaiming method can improve the cyclic utilization rate of an organic amino compound in the polyphenyl ether process so as to reduce unit consumption ofproduction; the total reclaiming rate of the organic amino composition reaches over 90 percent; and the organic amino with purity of 99 percent can be obtained.

Description

technical field [0001] The invention relates to a method for recovering organic amines, in particular to a method for recovering organic amines in polyphenylene ether copper-amine complex catalysts. Background technique [0002] Since U.S. Patents USP3,306,875 and USP3,306,875 first announced the process of using oxidative coupling method and using 2,6-dimethylphenol as a monomer to prepare high-molecular-weight polyphenylene ether resin in 1967, the synthesis route of polyphenylene ether and Catalysts are becoming more and more mature. Related patents include CN01118825 and CN87107289 of Asahi Kasei, and CN99816026 of GE. [0003] Polyphenylene ether is obtained by oxidative coupling reaction of 2,6-dimethylphenol under the action of a catalyst. Its production process steps mainly include synthesizing monomers, polymerizing, capping, separating, modifying, granulating, etc. Copper-amine complexes are generally used as catalysts for the oxidative coupling reaction of polyp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C209/86C08G65/46
Inventor 高岱巍刘宇辉王海军张洪波李瑞亢胡衍平
Owner CHINA NAT BLUESTAR (GRP) CO LTD