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

Ascorbic acid phosphorus-free corrosion and scale inhibitor, and preparation method thereof

A technology of ascorbic acid and phosphorus-free corrosion inhibition, which is applied in the fields of descaling and water softening, water/sludge/sewage treatment, chemical instruments and methods, etc. problems, to achieve the effect of reducing the corrosion rate, blocking the action of the primary battery, and reducing the corrosion current

Active Publication Date: 2011-10-26
WUHAN UNIV OF TECH +1
View PDF2 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Industrial circulating cooling water has the following characteristics: (1) The concentration of ions in industrial circulating cooling water is generally 4 to 5 times, and the scaling ion Ca 2+ , Mg 2+ 、HCO 3 - Such a large increase will easily cause fouling of the equipment, affect the heat conduction of the equipment, and easily cause production accidents; (2) The concentration of corrosive ions is also increasing, and the corrosion effect on the equipment will be enhanced, affecting the service life of the equipment
[0004] With the strengthening of environmental protection and safety awareness, some harmful and toxic corrosion and scale inhibitors will be restricted and banned

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
  • Ascorbic acid phosphorus-free corrosion and scale inhibitor, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of Ascorbic Acid Phosphorus-Free Corrosion and Scale Inhibitor

[0028] The material is taken according to the following composition mass percentages, hydrolyzed polymaleic acid 15%-20%, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 10%-15%, ascorbic acid 0.6%-1%, aminosulfonic acid 0.5% to 1%, zinc nitrate or zinc sulfate 10% to 15%, D-sodium gluconate 10% to 15%, the rest is distilled water, and then hydrolyzed polymaleic acid, acrylic acid-2-acrylamide-2-methyl Propanesulfonic acid, ascorbic acid, sulfamic acid, zinc nitrate or zinc sulfate, D-sodium gluconate or D-potassium gluconate, and distilled water are added to the container in the above order and stirred for 0.5h to 1h. The product is obtained when the mixture is clear and free of insoluble impurities.

Embodiment 2

[0030] Prepare 100g of ascorbic acid phosphorus-free corrosion and scale inhibitors, preparation process: get 50% hydrolyzed polymaleic acid 16.8g, 30% acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 11g, ZnSO 4 .7H 2 Add 12g of O, 12.8g of sodium D-gluconate, 0.7g of ascorbic acid, 0.8g of sulfamic acid, and the rest in distilled water into a clean and dry beaker, and stir evenly to obtain the product.

Embodiment 3

[0032] Prepare 100g of ascorbic acid phosphorus-free corrosion and scale inhibitors, preparation process: get 50% hydrolyzed polymaleic acid 16.8g, 30% acrylic acid-2-acrylamide-2-methylpropanesulfonic acid 12g, ZnSO 4 .7H 2 Add 11.5g of O, 13.4g of sodium D-gluconate, 0.7g of ascorbic acid, 0.7g of sulfamic acid, and the rest in distilled water into a clean and dry beaker, and stir evenly to obtain the product.

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

PropertyMeasurementUnit
scale inhibition rateaaaaaaaaaa
Login to View More

Abstract

The invention discloses an ascorbic acid phosphorus-free corrosion and scale inhibitor which is applicable for treatment of industrial circulating cooling water. The corrosion and scale inhibitor is prepared by compounding a maleic acid compound, an acrylic acid terpolymer, ascorbic acid, a sulfamic acid compound, a zinc salt, a gluconate and distilled water. The ascorbic acid phosphorus-free corrosion and scale inhibitor provided by the present invention provides good corrosion inhibition and scale inhibition effects for carbon steel equipment. The dosage of the phosphorus-free corrosion and scale inhibitor is 20 mg.L<-1> - 50 mg.L<-1> in the industrial circulating cooling water having an alkalinity less than 400 mg.L<-1>, a hardness less than 500 mg.L<-1>, a pH value less than 8.2, a conductance controlled from 0[mu]s.cm<-1>-2400[mu]s.cm<-1>. A plurality of experiment results show that the corrosion and scale inhibitor provides a annual corrosion rate lower than 0.04 mm.a<-1> and a calcium carbonate inhibition rate higher than 98% for the A3 carbon steel. Advantages of the ascorbic acid phosphorus-free corrosion and scale inhibitor and the preparation method are as follows: the discharged waste water during using the corrosion and scale inhibitor does not provide a eutrophic pollution caused by phosphor for water body; the environment is environment-friendly; agent cost for treating each ton of the water is less than 0.12 yuan; the product preparation process is simple.

Description

technical field [0001] The invention relates to a phosphorus-free ascorbic acid corrosion and scale inhibitor and its preparation, which is a phosphorus-free, biodegradable and environment-friendly corrosion and scale inhibitor suitable for industrial circulating cooling water treatment systems. Background technique [0002] Since entering the 21st century, the sustainable development strategy has become the consensus of all countries in the world. The three major problems facing the sustainable development of today's society are population expansion, resource shortage, and environmental degradation. To realize the harmonious development between man and nature, it is necessary to save resources and reduce the waste of resources caused by corrosion. The use of corrosion and scale inhibitors is a better anti-corrosion and scale-inhibiting method, which can play a big role in protecting resources and reducing material loss. [0003] In the past 30 years, my country's economy ...

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): C02F5/10
Inventor 曾德芳张伟张正亮张旭鸿
Owner WUHAN UNIV OF TECH
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