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Technique for separating and recovering phenol-isooctanol mixture on monophenyldiisooctyl phosphite production device

A phenylenedi-isooctyl phosphite and production device technology, applied in the separation/purification of hydroxyl compounds, preparation of organic compounds, compounds of Group 5/15 elements of the periodic table, etc., can solve the problem of low price and mixture Sales difficulties and other issues, to achieve the effect of improving comprehensive benefits, increasing the value of by-products, and reducing production costs

Active Publication Date: 2016-06-15
JIANGSU EVERGREEN NEW MATERIAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production process of phenylenedioctyl phosphite, while getting the product of phenylenedioctyl phosphite, a separated mixture of phenol / isooctanol will be obtained, and the mass percentage of these two components is 4 :1~19:1, at present, there is no relevant separation and recovery process at home and abroad. Domestic manufacturers sell the mixture as a by-product to phenolic resin manufacturers as raw materials for phenolic resin production. End users are concerned about the quality of phenolic resin In the environment of increasing attention, the sales of this mixture are becoming more and more difficult, and the selling price is also going from bad to worse

Method used

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  • Technique for separating and recovering phenol-isooctanol mixture on monophenyldiisooctyl phosphite production device

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A separation and recovery process of phenol and isooctyl alcohol mixture on a phenylenedi-isooctyl phosphite production device, the process is as follows:

[0024] (1) Nitrogen purging: After decompressing nitrogen, adjust it to a slight positive pressure, then pass it into the entire system, blow out the air in the entire system, and ensure that the system pressure is 101.53Pa during the entire process, and the system includes crystallization device, buffer tank, liquid storage tank, product tank and several connecting pipelines;

[0025] (2) Preheating the crystallizer: Open the hot water tank to make hot water, then pass the hot water into the shell side of the crystallizer, turn on the circulating water pump on the shell side of the crystallizer, circulate the hot water, and raise the temperature of the crystallizer to 45°C;

[0026] (3) Feed: Heat 1kg of the mixture of phenol and isooctyl alcohol to 45°C, then transfer it to the crystallizer after step (2) through ...

Embodiment 2

[0035] A separation and recovery process of phenol and isooctyl alcohol mixture on a phenylenedi-isooctyl phosphite production device, the process is as follows:

[0036] (1) Nitrogen purging: adjust the nitrogen pressure to a slight positive pressure after decompression, and then pass it into the entire system to blow out the air in the entire system, and ensure that the system pressure is 101.68Pa during the entire process. The system includes crystallization device, buffer tank, liquid storage tank, product tank and several connecting pipelines;

[0037] (2) Preheating the crystallizer: Open the hot water tank to make hot water, then pass the hot water into the shell side of the crystallizer, turn on the circulating water pump on the shell side of the crystallizer, circulate the hot water, and raise the temperature of the crystallizer to 45°C;

[0038] (3) Feed: Heat 1.5kg of the mixture of phenol and isooctyl alcohol to 45°C, then transport it to the crystallizer after ste...

Embodiment 3

[0047] A separation and recovery process of phenol and isooctyl alcohol mixture on a phenylenedi-isooctyl phosphite production device, the process is as follows:

[0048] (1) Nitrogen purging: After decompressing nitrogen, adjust it to a slight positive pressure, then pass it into the entire system, blow out the air in the entire system, and ensure that the system pressure is 101.71Pa during the entire process. The system includes crystallization device, buffer tank, liquid storage tank, product tank and several connecting pipelines;

[0049] (2) Preheating the crystallizer: Open the hot water tank to make hot water, then pass the hot water into the shell side of the crystallizer, turn on the circulating water pump on the shell side of the crystallizer, circulate the hot water, and raise the temperature of the crystallizer to 45°C;

[0050] (3) Feed: Heat 2 kg of the mixture of phenol and isooctyl alcohol to 45°C, then transfer it to the crystallizer after step (2) through the c...

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Abstract

The invention relates to a technique for separating and recovering a phenol-isooctanol mixture on a monophenyldiisooctyl phosphite production device. The technique comprises the following steps: (1) nitrogen purging; (2) crystallizer preheating; (3) feeding; (4) seeding; (5) crystallizing; (6) liquid discharging; (7) perspiration; (8) discharging; and (9) continuous production. The phenol-isooctanol mixture is effectively separated, the phenol yield can reach 60-70%, and the purity of the high-purity phenol product is greater than 99.5%; and thus, both phenol and isooctanol can be recovered, and the triphenyl phosphite and derivatives thereof can be produced, thereby enhancing the byproduct value and lowering the production cost.

Description

technical field [0001] The invention relates to a process for separating and recovering a mixture of phenol and isooctyl alcohol on a phenylenedioctyl phosphite production device, and belongs to the technical field of chemical production. Background technique [0002] In the production process of phenylenedioctyl phosphite, while getting the product of phenylenedioctyl phosphite, a separated mixture of phenol / isooctanol will be obtained, and the mass percentage of these two components is 4 :1~19:1, at present, there is no relevant separation and recovery process at home and abroad. Domestic manufacturers sell the mixture as a by-product to phenolic resin manufacturers as raw materials for phenolic resin production. End users are concerned about the quality of phenolic resin Under the environment of more and more attention, the sales of this mixture are becoming more and more difficult, and the selling price is also going from bad to worse. Therefore, it is more and more imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/84C07C39/04C07C29/78C07C31/125C07F9/48
CPCC07C29/78C07C37/84C07F9/4875C07C39/04C07C31/125
Inventor 雷树敏孙秋新
Owner JIANGSU EVERGREEN NEW MATERIAL TECH
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