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Method for producing phenolic resin by utilizing paraformaldehyde

A paraformaldehyde and phenolic resin technology, applied in the field of phenolic resin production, can solve the problems of inconvenient transportation of liquid formaldehyde, pollution of the environment by waste water, and large energy consumption

Inactive Publication Date: 2010-06-09
湖南中野高科技特种材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this traditional process, in addition to the inconvenient transportation of liquid formaldehyde and the need to consume a lot of energy for dehydration of the resin, there is also the problem of discharging a large amount of waste water to pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1), back up raw materials according to the following weight ratio:

[0020] Phenol 350kg,

[0021] Paraformaldehyde 176kg,

[0022] Sodium hydroxide 1.5kg,

[0023] Barium hydroxide 10kg,

[0024] Urea 14kg,

[0025] 80kg of water;

[0026] (2), put the phenol, sodium hydroxide and barium hydroxide prepared in step (1) into the reaction kettle, and stop heating after the temperature in the kettle is raised to 60°C. Put 22kg of paraformaldehyde into the reaction kettle, and control the temperature in the kettle, and the temperature control range is 75-95°C. After putting paraformaldehyde into the reactor for the first time, put 22kg of paraformaldehyde into the reactor every 15 to 25 minutes, and finish 7 times;

[0027] (3) Control the temperature in the kettle in the range of 75-85°C and keep it warm for 60 minutes. Then the temperature was raised to 95-110°C for 30 minutes at high temperature. Then use the conventional method to test the emulsification point ...

Embodiment 2

[0030] (1), back up raw materials according to the following weight ratio:

[0031] Phenol 400g,

[0032] Paraformaldehyde 224g,

[0033] Sodium hydroxide 2g,

[0034] Barium hydroxide 15g,

[0035] Urea 20g,

[0036] 150g of water;

[0037] (2), put the phenol, sodium hydroxide and barium hydroxide prepared in step (1) into the reaction kettle, and stop heating after the temperature in the kettle is raised to 60°C. Put 28g of paraformaldehyde into the reaction kettle, control the temperature in the kettle, and the temperature control range is 75~95℃. After putting paraformaldehyde into the reactor for the first time, put 28g of paraformaldehyde into the reactor every 15 to 25 minutes, and finish 7 times;

[0038] (3) Control the temperature in the kettle in the range of 75-85°C and keep it warm for 80 minutes. Then the temperature was raised to 95-110°C for 50 minutes at high temperature. Then use the conventional method to test the emulsification point of the phenoli...

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Abstract

The invention relates to a method for producing phenolic resin by utilizing paraformaldehyde, which comprises the following steps of: 1. preparing raw materials in the following proportion by weight: 350-400 phenol, 176-224 paraformaldehyde, 1.5-2 sodium hydroxide, 10-15 barium hydroxide, 14-20 urea and 80-150 water; 2. adding the phenol, the sodium hydroxide and the barium hydroxide into a reaction kettle for heating; adding 1 / 8 of paraformaldehyde and controlling the temperature in the kettle; and adding again every 15-25 minutes and adding totally seven time; 3. preserving heat for 60-80 minutes and then heating to the temperature of 95-110 DEG C for high temperature reaction for 30-50 minutes; and 4. when an opacifying point reaches 52-57 DEG C, adding the urea and the water and discharging when the temperature in the kettle is decreased to 50 DEG C to obtain a finished product. The method overcomes the problems of inconvenient liquid formaldehyde transportation, large energy consumption, environmental pollution and the like troubling enterprise development for a long time, and is beneficial to the development of the trade.

Description

technical field [0001] The invention relates to a production method of phenolic resin, which belongs to the technical field of high molecular organic compounds. Background technique [0002] Phenolic foam is a light-weight and energy-saving product with excellent performance. It has multiple functions such as fire prevention, heat insulation, and sound insulation. It has been widely used in air ducts, wall insulation, aviation, and chemical industries. And be used to produce the raw material phenolic resin of phenolic foam, at present, the overwhelming majority still adopts phenol and the liquid formaldehyde solution that concentration is 37% to react under the catalysis of alkaline catalyst. Using this traditional process, in addition to the inconvenient transportation of liquid formaldehyde and the need to consume a lot of energy for dehydration of the resin, there is also the problem of discharging a large amount of waste water and polluting the environment. These proble...

Claims

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Application Information

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IPC IPC(8): C08G8/10
Inventor 黎超喻泽
Owner 湖南中野高科技特种材料有限公司
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