Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Production method for sulfonic acid curing agent used for casting

A production method and curing agent technology, applied in sulfonic acid preparation, casting molding equipment, casting molds, etc., can solve the problems of unsatisfactory production efficiency and environmental protection requirements, long dehydration time, etc., achieve broad market application prospects and improve production efficiency , The effect of shortening the production man-hour

Inactive Publication Date: 2012-06-27
NINGXIA KOCEL GRP CO LTD +1
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The dehydration time of the synthesis reaction is relatively long. Taking the 3-ton reactor in the workshop as an example, it takes 9-10 hours to achieve the dehydration amount required by the process, and produces 250kg-300kg of waste water. The production efficiency and environmental protection requirements are not ideal.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production method for sulfonic acid curing agent used for casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment one: a kind of production method of casting sulfonic acid curing agent is characterized in that: it comprises the following steps

[0021] a. Close the bottom valve of the kettle, turn on the vacuum pump, and inhale 5% to 8% of toluene;

[0022] b. Close the vacuum valve, open the vent valve, open the sulfuric acid feeding valve, start the mixer, and add 30% to 35% of concentrated sulfuric acid;

[0023] c. Open the steam valve, maintain the steam pressure at 0.2-0.3MPa, raise the temperature to 100-118°C within 40-50 minutes, and keep the temperature for 90 minutes;

[0024] d. Open the cooling water valve, lower the temperature to 60°C, and slowly add 20% to 30% of organic alcohol through the high-level tank;

[0025] e. After adding the organic alcohol, slowly add 30% to 40% of water through the high tank;

[0026] f. After adding water, cool down to 45°C, add 1% hydrogen peroxide aqueous solution, stir for 20 minutes and take samples for inspection.

...

Embodiment 2

[0028] Embodiment two: a kind of production method of sulfonic acid solidifying agent for foundry, it comprises the following steps: a. close the bottom valve of the tank, open the vacuum pump, inhale 5%~8% of toluene;

[0029] b. Close the vacuum valve, open the vent valve, open the sulfuric acid feeding valve, start the mixer, and add 35% to 40% of concentrated sulfuric acid;

[0030] c. Open the steam valve, maintain the steam pressure at 0.2-0.3MPa, and raise the temperature to 100°C-118°C within 40-50 minutes; keep warm for 90 minutes;

[0031] d. Open the cooling water valve, lower the temperature to 60°C, and slowly add 20% to 30% of organic alcohol through the high-level tank;

[0032] e. After adding the organic alcohol, slowly add 25% to 35% of water through the high tank;

[0033] f. After adding water, cool down to 45°C, add 1% hydrogen peroxide aqueous solution, stir for 20 minutes and take samples for inspection.

[0034] The sulfonic acid curing agent is suita...

Embodiment 3

[0035] Embodiment three: a kind of production method of casting sulfonic acid curing agent, it comprises the following steps: a. close the bottom valve of the tank, open the vacuum pump, inhale 5%~8% of toluene;

[0036] b. Close the vacuum valve, open the vent valve, open the sulfuric acid feeding valve, start the mixer, and add 40% to 50% of concentrated sulfuric acid;

[0037] c. Open the steam valve, maintain the steam pressure at 0.2-0.3MPa, raise the temperature to 100-118°C within 40-50 minutes, and keep the temperature for 90 minutes;

[0038] d. Open the cooling water valve, lower the temperature to 60°C, and slowly add 20% to 30% of organic alcohol through the high-level tank;

[0039] e. After adding the organic alcohol, slowly add 15% to 25% of water through the high tank;

[0040] f. After adding water, cool down to 45°C, add 1% hydrogen peroxide aqueous solution, stir for 20 minutes and take samples for inspection.

[0041] The sulfonic acid curing agent is su...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a production method for sulfonic acid curing agent and especially to a production method for sulfonic acid curing agent used for casting without generation of three wastes (waste gas, waste water and industrial residue). The method is characterized by comprising the following steps: a, closing a kettle bottom valve, opening a vacuum pump and taking in toluene with a desired weight; b, closing a vacuum valve, opening an air release valve and a sulfuric acid feeding valve, starting a mixer and adding concentrated sulfuric acid with a desired weight; c, opening a steam valve, maintaining steam pressure to be 0.2 to 0.3 MPa, allowing temperature to rise to 100 to 118 DEG C within 40 to 50 min and carrying out insulation for 90 min; d, opening a cooling water valve, allowing temperature to drop to 60 DEG C and slowly adding organic alcohol with a desired weight through an elevated tank; e, slowly adding water with a desired weight through the elevated tank after addition of organic alcohol is finished; and f, after addition of water is finished, allowing temperature to drop to 45 DEG C, adding an aqueous hydrogen peroxide solution with a desired weight, carrying out stirring for 20 min and carrying out inspection by sampling. According to the invention, control of total acidity of the curing agent and free acid is realized, production efficiency is effectively improved, and no discharge of industrial three wastes is realized.

Description

technical field [0001] The present invention relates to a production method of a sulfonic acid curing agent, in particular to a production method of a sulfonic acid curing agent for foundry that does not produce three wastes. Background technique [0002] At present, the commonly used sulfonic acid curing agent for furan resin in the industry is p-toluenesulfonic acid aqueous solution. It is produced by sulfonation, detoluene, transposition crystallization and separation of toluene under the action of a catalyst. During sulfonation, it mainly generates ortho- and para-position substitutions. The reaction formula is: [0003] [0004] The dehydration time of the synthesis reaction is relatively long. Taking the 3-ton reactor in the workshop as an example, it takes 9-10 hours to achieve the dehydration amount required by the process, and 250kg-300kg of waste water is generated. The production efficiency and environmental protection requirements are not ideal. Contents of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/06C07C309/30B22C1/10
Inventor 靳毅韩文杨洋何龙
Owner NINGXIA KOCEL GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com