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A kind of preparation method of 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 raw material unit consumption, etc., and achieve the effect of reducing unit consumption, reducing consumption and improving purity

Active Publication Date: 2020-08-18
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 phenol, 1mol oxalic acid and 2350g water (10wt.% to phenol) into the reaction kettle, heat and stir for 35 minutes, and gradually raise the temperature to 87°C to obtain the 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) The mixture II was dehydrated by a falling film evaporator at a temperature of 115°C and normal pressure for 1 minute, and then dephenolized for the first time by a falling film evaporator at a temperature of 165°C and a pressure of 10KPa. The time is 1 minute, and the temperature is 175° C. and the pressure is 0.6 KPa, and the second dephenolization is carried out by a rotary thin film evaporator. The time is 1 minute, and the excess phenol is recovered to obtain BPF resin and recovered phenol.

[0031] In the recovered phenol obtained, the phenol content was 240 mol, and the oxalic acid content was 0.5 mol...

Embodiment 2

[0034] (1) Add 10ml of phenol and 0.5mol oxalic acid to the recovered phenol obtained in Example 1 to obtain 250mol of phenol and 1mol of oxalic acid, which and 2350g of water (10wt.% relative to phenol) are added to the reactor, heated and stirred For 40 minutes, the temperature was gradually raised to 87°C to obtain the mixture I ’ ;

[0035] (2) Add 10mol formaldehyde to the mixture I continuously for 2 hours, and heat the reaction at 90°C to obtain the mixture II ’ ;

[0036] (3) Add mixture II ’ The falling film evaporator was dehydrated for 1 minute at a temperature of 115°C and normal pressure, and then the first dephenolization was carried out at a temperature of 165°C and a pressure of 10KPa by a falling film evaporator for 1 minute. The thin-film evaporator conducts the second dephenolization under the condition of temperature of 175°C and pressure of 0.6KPa for 1 minute, and recovers excess phenol to obtain BPF resin and secondary recovery of phenol.

[0037] Af...

Embodiment 3

[0039] (1) Add 250mol phenol, 1mol oxalic acid and 1880g water (8wt.% to phenol) into the reaction kettle, heat and stir for 30 minutes, and gradually raise the temperature to 87°C to obtain the mixture I;

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

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

[0042] In the recovered phenol obtained, the phenol content was 240 mol, and the oxalic acid content was 0.5 mol.

...

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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, in particular to a preparation method of BPF resin. Background technique [0002] BPF resin is produced by chemical reaction with phenol and formaldehyde as raw materials under the action of catalyst. [0003] The original process manufacturing method is that the reaction, dehydration, and dephenolization processes are all carried out in a reactor. Thus, in the case of oxalic acid as a catalyst, a key issue is how to determine the molar ratio of phenol and formaldehyde. When the molar ratio of phenol and formaldehyde is low, BPF produces more high boiling substances, which brings about a corresponding decrease in the purity of BPF. 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 pub...

Claims

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Application Information

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Patent Type & Authority Patents(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