Agent of anti dirt of allylloxy polyether, and preparation method

An allyloxy polyether, allyloxy technology, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc., can solve pollution, poor performance, bacteria and algae red tide and other problems to achieve good compatibility

Inactive Publication Date: 2007-07-25
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the research on scale inhibitors at home and abroad mainly focuses on organic polyphosphoric acid scale inhibitors and polycarboxylic acid scale inhibitors. Among them, organic polyphosphoric acid scale inhibitors have stable chemical properties, can withstand high temperature and pH, and are effective. Obvious solubility limit effect and synergistic effect, etc., prevent CaCO 3 Because of its high scale efficiency, it has been widely used, such as aminotrimethylene phosphoric acid (ATMP), hydroxyethylene diphosphonic acid (HEDP), 2-phosphorylbutane-1,2,4-tricarboxylic acid (PBTCA ), etc., but such antiscalants cannot effectively inhibit Ca 3 (PO 4 ) 2 Scale and Zn scale cannot solve the problem of iron oxide precipitation, and they are easy to form organic phosphate scale. At the same time, phosphorus-containing antiscalants are also easy to cause eutrophication of environmental waters, pr

Method used

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  • Agent of anti dirt of allylloxy polyether, and preparation method
  • Agent of anti dirt of allylloxy polyether, and preparation method
  • Agent of anti dirt of allylloxy polyether, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0037] Example 1: at N 2 Add 100g of allyloxy polyethoxy ether, 25g of sulfamic acid, and 1g of urea into the protected four-neck flask, and heat the reactants to 100-120°C for 4 hours to obtain allyloxypolyethoxysulfonium ammonium acid. in N 2 Under protection, mix 50g of allyloxy polyethoxy ammonium sulfonate (dissolved in 150g of distilled water) and 60g of maleic anhydride-acrylic acid copolymer and then heat up to 60°C, while adding 50g of 50% maleic anhydride dropwise Aqueous solution and 3g of benzoyl peroxide (dissolved in 50g of distilled water) were added dropwise at constant temperature for 1 hour. After the dropping, the temperature was raised to 70°C to continue the reaction for 1 hour, and then lowered to room temperature to obtain a dark yellow viscous transparent AOPE liquid.

[0038] The obtained AOPE scale inhibitor inhibits Ca 3 (PO 4 ) 2 The rate is 99.47%; CaCO 3 The rate is 97.97%.

example 2

[0039] Example 2: at N 2 Add 100g of allyloxy polyethoxy ether, 25g of sulfamic acid, and 1g of urea into the protected four-necked flask, and heat the reactant to 110-120°C for 4 hours to obtain allyloxypolyethoxysulfonium ammonium acid. in N 2 Under protection, mix 50g of allyloxy polyethoxy ammonium sulfonate (dissolved in 150g of distilled water), 60g of maleic anhydride-acrylic acid copolymer and 100g of 50% maleic anhydride aqueous solution and then heat up to 60°C. Add 3g of benzoyl peroxide (dissolved in 50g of distilled water) dropwise, add dropwise at a constant temperature for 1 hour, after the dropping, raise the temperature to 70°C and continue the reaction for 2 hours, then cool down to room temperature to obtain a dark yellow viscous transparent AOPE liquid.

[0040] The obtained AOPE scale inhibitor inhibits Ca 3 (PO 4 ) 2 The rate is 94.92%; CaCO 3 The rate is 83.53%.

example 3

[0041] Example 3: at N 2 Add 100g of allyloxy polyethoxy ether, 25g of sulfamic acid, and 1g of urea into the protected four-necked flask, and heat the reactant to 110-120°C for 4 hours to obtain allyloxypolyethoxysulfonium ammonium acid. in N 2 Under protection, 50g of allyloxy polyethoxy ammonium sulfonate (dissolved in 200g of distilled water), 160g of maleic anhydride-acrylic acid copolymer were mixed and heated to 70°C, while 80g of maleic anhydride (dissolved in 150g of distilled water) and 5g of ammonium superphosphate (dissolved in 50g of distilled water), the temperature was kept at 70°C during the dropwise addition, and after the dropwise addition, the temperature was raised to 80°C and continued to insulate and stir the reaction for 3h, down to room temperature, and the obtained appearance was Dark yellow viscous transparent liquid.

[0042] The obtained AOPE scale inhibitor inhibits Ca 3 (PO 4 ) 2 The rate is 99.23%; CaCO 3 The rate is 80.78%.

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PUM

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Abstract

This invention relates to a method for preparing allyloxy polyether scale inhibitor, which is a stable, phosphorus-free, biodegradable and environmentally friendly scale inhibitor. The scale inhibitor is a mixture of free radical copolymerization product of allyloxy polyether monomer and vinyl-containing monomer 80-90 wt.%, and graft-copolymerization product of allyloxy polyether monomer and maleic anhydride-acrylic acid copolymer 10-20 wt.%. The method comprises: (1) reacting allyloxy polyethoxy ether, amino sulfonic acid and urea under nitrogen protection to obtain allyloxy polyethoxy ammonia sulfonate; (2) mixing with maleic anhydride-acrylic acid copolymer, and adding water to obtain an aqueous solution; (3) adding initiator solution and maleic anhydride solution at a uniform speed; (4) reacting for 0.5-5 h to obtain the product.

Description

technical field [0001] The invention relates to the preparation of a stable, phosphorus-free and biodegradable green allyloxy polyether scale inhibitor, which belongs to the scale inhibitor preparation technology in the technical field of water treatment and is suitable for industrial cooling water circulation systems. Background technique [0002] Corrosion, scaling and microbial growth are the three major problems in the industrial cooling water circulation system. Therefore, the cooling water treatment chemicals are mainly composed of corrosion inhibitors, scale inhibitors and bactericides. Dispersed microcrystals and lattice distortion can prevent the deposition of scale-causing salts in water on the surface of equipment. Since scaling of equipment will reduce heat transfer efficiency and cause under-scale corrosion, it is important to use high-efficiency scale inhibitors to inhibit scale formation. One of the key technologies to keep the cooling water circulation system...

Claims

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Application Information

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IPC IPC(8): C02F5/10
Inventor 周钰明杜琨
Owner SOUTHEAST UNIV
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