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Production technology of furan resin for casting

A technology of furan resin and production process, which is applied in the direction of manufacturing tools, casting molding equipment, casting molds, etc., can solve environmental pollution and other problems, and achieve the effects of eliminating pollution, good environmental protection effect, and shortening production hours

Active Publication Date: 2012-06-27
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

Wastewater contains a large amount of free formaldehyde, methanol, methyl furan and other small molecular organic substances, and the COD value is as high as tens of thousands. Discharging into water will cause very serious environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment one: a kind of production technology of casting furan resin is characterized in that: it comprises the steps:

[0022] a. Feeding: Close the discharge valve at the bottom of the kettle, open the feed valve, add 22% formaldehyde, start the mixer, add 15% urea, 8% paraformaldehyde, close the feed valve, and use lye to bring the pH value of the feed solution to 8.5 —8.8;

[0023] b. heating up : Open the steam valve, maintain the steam pressure at 0.1-0.2MPa, raise the temperature to 90-92°C within 30 minutes, and keep the temperature for 60 minutes;

[0024] c. Dehydration: After the heat preservation is over, turn on the cooling water, lower the temperature to 90°C, add 26.5% furfuryl alcohol, 0.2% formaldehyde reducer, and add an acidic catalyst to adjust the pH value of the feed solution to 4.3-4.5;

[0025] d. Open the steam valve, raise the temperature to 88-92°C within 20-30 minutes, and keep warm for 60 minutes;

[0026] e. Discharging: When the temp...

Embodiment 2

[0028] Embodiment two: a kind of production technology of casting furan resin is characterized in that: it comprises the steps:

[0029] a. Feeding: Close the discharge valve at the bottom of the kettle, open the feed valve, add 3.1% formaldehyde, start the mixer, add 0.5% urea, 2% paraformaldehyde, close the feed valve, and use lye to adjust the pH value of the feed solution to 8.5 —8.8;

[0030] b. heating up : Open the steam valve, maintain the steam pressure at 0.1-0.2MPa, raise the temperature to 90-92°C within 30 minutes, and keep the temperature for 60 minutes;

[0031] c. Dehydration: After the heat preservation is over, turn on the cooling water, lower the temperature to 90°C, add 50% furfuryl alcohol, 0.6% formaldehyde reducer, and add an acidic catalyst to adjust the pH value of the feed solution to 4.3-4.5;

[0032] d. Open the steam valve, raise the temperature to 88-92°C within 20-30 minutes, and keep warm for 60 minutes;

[0033] e. Discharging: when the tem...

Embodiment 3

[0035] Embodiment three: a kind of production technology of casting furan resin is characterized in that: it comprises the steps:

[0036] a. Feeding: close the discharge valve at the bottom of the kettle, open the feed valve, add 19.8% formaldehyde, start the mixer, add 13.8% urea, 15% paraformaldehyde, close the feed valve, and use lye to bring the pH value of the feed solution to 8.5 —8.8;

[0037] b. heating up : Open the steam valve, maintain the steam pressure at 0.1-0.2MPa, raise the temperature to 90-92°C within 30 minutes, and keep the temperature for 60 minutes;

[0038] c. Dehydration: After the heat preservation is over, turn on the cooling water, lower the temperature to 90°C, add 30% furfuryl alcohol, 0.6% aldehyde reducer, and add an acidic catalyst to adjust the pH value of the feed liquid to 4.3-4.5;

[0039] d. Open the steam valve, raise the temperature to 88-92°C within 20-30 minutes, and keep warm for 60 minutes;

[0040] e. Discharging: when the tempe...

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Abstract

The invention relates to a production technology of furan resin, particularly to a production technology of the furan resin for casting, comprising the following steps: charging, heating up, dehydrating, opening a steam valve, heating up to 80-108 DEG C in 20-30 min, preserving heat for 60-90 min, discharging, packaging, and warehousing. According to the invention, a product with low free formaldehyde and high strength can be provided by the technology, and the production process has no generation of three wastes and is green.

Description

technical field [0001] The present invention relates to a production method of furan resin, in particular to a production process of furan resin for casting. Background technique [0002] Furan resin is a polymer based on furfuryl alcohol, which is the most widely used type of casting resin binder. At present, it is the most used in our country. The appearance of furan resin has greatly changed the core-making process of foundry workshops for single-piece and small-batch production. It enables the workshops for small batch production of single pieces to form mechanized assembly line production, and the mechanized molding line represented by "high-speed molding circle" appears. Various types of furan resins and corresponding curing agents and auxiliary materials have been supplied in large quantities in China. Accelerated the wide application of furan resin. [0003] At present, the production of no-bake furan resin in China mainly uses formaldehyde (36.5%) aqueous solutio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G16/02B22C1/22
Inventor 靳毅何龙杨洋韩文
Owner 共享新材料(山东)有限公司
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