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Preparation method for BPF resin

A technology of resin and phenol, which is applied in the field of BPF resin preparation, can solve the problems of phenol consumption, large amount of public works, deterioration of unit consumption of raw materials, etc., and achieve the effect of reducing unit consumption, reducing consumption and improving purity

Active Publication Date: 2018-07-06
山东艾蒙特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conversely, if the molar ratio of phenol and formaldehyde is increased, although the generation of high boilers will be reduced, the recovery of excess phenol will consume a large amount of public works, which will lead to deterioration of the unit consumption of public works and raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Add 250mol of phenol, 1mol of oxalic acid and 2350g of water (10wt.% relative to phenol) into the reactor, heat and stir for 35 minutes, and gradually increase the temperature to 87°C to obtain mixture I;

[0029] (2) Add 10 mol of formaldehyde to the mixture I continuously for 2 hours, and heat the reaction at a temperature of 90°C to obtain the mixture II;

[0030] (3) Dehydrate the mixture II through a falling film evaporator at a temperature of 115°C and normal pressure for 1 minute, and then pass it through a falling film evaporator at a temperature of 165°C and a pressure of 10KPa for the first dephenolization. The time is 1 minute, and the second dephenolization is carried out using a rotary thin film evaporator at a temperature of 175°C and a pressure of 0.6KPa. The time is 1 minute. After the excess phenol is recovered, the BPF resin and the phenol are recovered.

[0031] In the obtained recovered phenol, the phenol content was 240 mol and the oxalic acid content ...

Embodiment 2

[0034] (1) Add 10ml of phenol and 0.5mol of oxalic acid to the recovered phenol obtained in Example 1 to obtain 250mol of phenol and 1mol of oxalic acid. Add them and 2350g of water (10wt.% relative to the amount of phenol) into the reactor and heat and stir. In 40 minutes, the temperature was gradually increased to 87°C to obtain mixture I ’ ;

[0035] (2) Add 10 mol of formaldehyde to Mixture I for 2 hours, and heat and react at a temperature of 90℃ to obtain Mixture II ’ ;

[0036] (3) The mixture II ’ Dehydrate for 1 minute through the falling film evaporator at a temperature of 115°C and atmospheric pressure, and then use the falling film evaporator to perform the first dephenolization at a temperature of 165°C and a pressure of 10KPa for 1 minute. The thin film evaporator performs a second dephenolization under the conditions of a temperature of 175°C and a pressure of 0.6KPa, and the time is 1 minute. After recovering the excess phenol, the BPF resin and the second recove...

Embodiment 3

[0039] (1) Add 250mol of phenol, 1mol of oxalic acid and 1880g of water (in an amount of 8wt.% relative to phenol) into the reactor, heat and stir for 30 minutes, and gradually increase the temperature to 87°C to obtain mixture I;

[0040] (2) Add 10 mol of formaldehyde to the mixture I for 2 hours, and heat the reaction at a temperature of 93°C to obtain the mixture II;

[0041] (3) Dehydrate the mixture II through a falling film evaporator at a temperature of 115°C and normal pressure for 1 minute, and then pass it through a falling film evaporator at a temperature of 165°C and a pressure of 10KPa for the first dephenolization. The time is 1 minute, and the second dephenolization is carried out through a rotary thin film evaporator at a temperature of 175°C and a pressure of 0.6KPa. The time is 1 minute. After the excess phenol is recovered, the BPF resin and the phenol are recovered.

[0042] In the obtained recovered phenol, the phenol content was 240 mol and the oxalic acid cont...

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PUM

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Abstract

The invention belongs to the field of high-molecular materials, in particular to a preparation method for BPF resin. The preparation method comprises the following steps: (1) adding phenol, oxalic acid and water into a reaction kettle, performing heating and stirring to obtain a mixture I; (2) continually adding formaldehyde into the mixture I; performing heating for reacting to obtain a mixture II; (3) dehydrating and dephenolizing the mixture to obtain the BPF resin and recycled phenol. By adopting the preparation method, the generation of high-boiling residues is lowered through dehydrationreaction, and continuous film recycling on over-amount phenol, so that the purity of the BPF resin of the reaction product is improved, meanwhile, common engineering consumption is lowered by 30 percent, and the simple consumption of the raw material is lowered greatly.

Description

Technical field [0001] The invention belongs to the field of polymer materials, and particularly relates to a preparation method of BPF resin. Background technique [0002] BPF resin is produced by chemical reaction with phenol and formaldehyde as raw materials. [0003] The original manufacturing method is that the process of reaction, dehydration, and dephenolization are all carried out in a reactor. In this way, when oxalic acid is used as a catalyst, a key issue is how to determine the molar ratio of phenol to formaldehyde. When the molar ratio of phenol to formaldehyde is low, BPF generates more high-boiling substances, which results in a corresponding decrease in BPF purity. Conversely, if the molar ratio of phenol to formaldehyde is increased, although the production of high boilers will be reduced, the recovery of excess phenol will consume a large amount of public works, resulting in deterioration of the unit consumption of public works and raw materials. Summary of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G8/10
CPCC08G8/10
Inventor 李长彬片冈英夫魏慧新刘彩霞吕占美刘刚王敏
Owner 山东艾蒙特新材料有限公司