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Non-dewatering production method of quick-hardening furan resin

A production method and technology of furan resin, applied in the field of casting, can solve problems such as difficult wastewater treatment, and achieve the effects of reducing energy consumption, reducing moisture, and reducing material loss

Active Publication Date: 2016-06-15
共享新材料(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides a kind of non-dehydration production method of fast hardening furan resin, to solve the technical problem that the waste water treatment of production is difficult

Method used

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  • Non-dewatering production method of quick-hardening furan resin
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Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 50 parts of formaldehyde, 100 parts of paraformaldehyde, and 180 parts of furfuryl alcohol into the reaction kettle, stir evenly, add 0.01 parts of propionic acid, heat to 100°C, keep the temperature for 3 hours; then continue to add 50 parts of urea to the reaction kettle, The reaction temperature is increased to 105°C, and the reaction is kept for 50 minutes; 400 parts of furfuryl alcohol are continuously added, and the material is discharged while stirring and cooling to room temperature. Wherein, the parts of each raw material component are parts by weight.

Embodiment 2

[0026] Add 60 parts of formaldehyde, 90 parts of paraformaldehyde, and 200 parts of furfuryl alcohol into the reaction kettle, stir well, add 0.02 parts of propionic acid, heat to 102°C, keep warm for 3.5 hours; then continue to add 60 parts of urea to the reaction kettle, The reaction temperature is increased to 106°C, and the reaction is kept for 55 minutes; 500 parts of furfuryl alcohol are continuously added, and the temperature is lowered to room temperature with stirring to discharge. Wherein, the parts of each raw material component are parts by weight.

Embodiment 3

[0028] Add 100 parts of formaldehyde, 80 parts of paraformaldehyde, and 250 parts of furfuryl alcohol into the reactor, stir evenly, add 0.04 parts of propionic acid, heat to 104°C, keep the temperature for 4 hours; then continue to add 80 parts of urea to the reactor, The reaction temperature is increased to 108°C, and the reaction is kept for 60 minutes; 600 parts of furfuryl alcohol are continuously added, and the temperature is lowered to room temperature with stirring to discharge. Wherein, the parts of each raw material component are parts by weight.

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Abstract

The invention discloses a non-dewatering production method of a quick-hardening furan resin. The method comprises the following steps: adding 50-100 parts by weight of formaldehyde, 75-150 parts by weight of polyformaldehyde and 150-300 parts by weight of furfuryl alcohol into a reaction kettle, stirring uniformly, adding 0.01-0.05 part by weight of organic acid catalyst, heating, and keeping the temperature to react; continuing adding 50-100 parts by weight of urea into a reaction kettle, heating, and keeping the temperature to react; and continuing adding 400-800 parts by weight of furfuryl alcohol, cooling to room temperature by stirring, and discharging. Polyformaldehyde is used instead of part of formaldehyde to react with furfuryl alcohol, thereby lowering the water content in the reaction environment, enhancing the reaction speed, eliminating the dewatering process, lowering the energy consumption and material loss, and achieving the effect of wastewater-free production. When the non-dewatering production method provided by the invention is in actual use, the ratio of the stripping time to the usable time can reach 9:1, thereby greatly enhancing the production efficiency.

Description

Technical field [0001] The invention relates to the field of casting, in particular to a method for rapidly hardening furan resin without dehydration. Background technique [0002] 2,5-Dihydroxymethylfuran is used as a furan resin additive, which can effectively promote the hardening of furan resin, but there is currently no large-scale industrial production of 2,5-dimethylolfuran in China. [0003] Using furfuryl alcohol and formaldehyde under a special catalyst can produce a mixture containing 2,5-dimethylolfuran. [0004] (2,5-Dihydroxymethylfuran) [0005] Use this mixture as a primary polymer to produce a new type of fast-curing furan resin. But in production, vacuum dehydration is required, on the one hand to promote the reaction of furfuryl alcohol and formaldehyde, on the other hand to remove the excess water brought in by the aqueous formaldehyde solution. [0006] Vacuum dehydration produces waste water containing formaldehyde, which is difficult to process and expensive. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G16/04C08G16/02
CPCC08G16/0262C08G16/04
Inventor 马文韩文崔刚
Owner 共享新材料(山东)有限公司
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