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Preparation method of olefin ether and unsaturated carboxylic acid copolymer anti-sludging agent

A technology of olefin ether carboxylic acid and carboxylic acid copolymer, applied in chemical instruments and methods, descaling and water softening, water/sludge/sewage treatment, etc. It can solve the problems of inhibiting calcium carbonate precipitation and insufficient scale inhibition performance, so as to achieve the effect of enhancing initiation efficiency, improving solubility, and improving scale inhibition performance.

Inactive Publication Date: 2015-06-03
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the scale inhibitor dosage is 6mg / L, the calcium sulfate and calcium phosphate inhibition rates are 82.88% and 99.89% respectively, but the scale inhibition effect on calcium carbonate is not good. Even if the dosage is 20mg / L, the carbonation resistance Calcium rate is only 65%
Ling et al. (Ling L, Zhou Y, Huang J, et al.Carboxylate-terminated double-hydrophilic block copolymer as an effective and environmental inhibitor in cooling water systems[J].Desalination,2012,304:33-40.) synthesized a A double hydrophilic block copolymer scale inhibitor PAA / APEG-PG-COOH, (polyacrylic acid-allyl alcohol polyoxyethylene ether-polyglycerol) has good scale inhibition effect on calcium sulfate and calcium phosphate, but It cannot inhibit the formation of calcium carbonate precipitates very well, and the calcium carbonate resistance rate can only reach about 80%.
From the above, it can be seen that this kind of scale inhibitor only has a good scale inhibition effect on a certain scale body, and the scale inhibition performance on other scale bodies is still insufficient.

Method used

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  • Preparation method of olefin ether and unsaturated carboxylic acid copolymer anti-sludging agent
  • Preparation method of olefin ether and unsaturated carboxylic acid copolymer anti-sludging agent
  • Preparation method of olefin ether and unsaturated carboxylic acid copolymer anti-sludging agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Add 7.5g of isobutenyl alcohol polyoxyethylene ether, 0.6g of sodium hydroxide and 15ml of absolute ethanol (0.789g / ml) into a four-neck flask, and after alkalization at 50°C for 1.0h, slowly dropwise add 1.985g of chloroacetic acid (dissolved After the ethanol solution in 5ml of absolute ethanol) was added dropwise, 0.6g of sodium hydroxide was added, and the temperature was raised to 90°C for 5h, and filtered, distilled, and vacuum-dried to obtain sodium isobutenol polyoxyethylene ether carboxylate (HPEC );

[0047] Add 2.0g sodium isobutenol polyoxyethylene ether carboxylate, 2.0g itaconic acid and 7.0g distilled water to the four-neck flask, mix well and heat up to 90°C, then slowly add 0.240g (dissolved in 1.0g distilled water) Sodium phosphate aqueous solution and 0.320g (dissolved in 2.0g distilled water) ammonium persulfate aqueous solution, the oxidant is added dropwise in batches, and the interval between drops is 10min. After the dropwise addition, react at ...

Embodiment 2

[0054] Add 7.5g of isobutenol polyoxyethylene ether, 0.6g of potassium hydroxide and 20ml of absolute ethanol to a four-neck flask, and after alkalization at 60°C for 1.0h, slowly add 2.279g of 3-chloropropionic acid (dissolved in 10ml of anhydrous Ethanol) ethanol solution, after the dropwise addition, add 0.6g of potassium hydroxide, heat up to 110°C for 3 hours, filter, distill, and dry in vacuo to obtain potassium isobutenol polyoxyethylene ether carboxylate;

[0055] Add 2.0g potassium isobutenol polyoxyethylene ether carboxylate, 2.0g aconitic acid and 8.0g distilled water to the four-neck flask, mix well and heat up to 100°C, then slowly add 0.200g (dissolved in 1.0g distilled water) sub Sodium phosphate aqueous solution and 0.320g (dissolved in 3.0g distilled water) ammonium persulfate aqueous solution, the oxidizing agent was added dropwise in 3 batches, and the interval between drops was 10min. After the dropwise addition, react at 100°C for 1.5h, and cool to room te...

Embodiment 3

[0059] Add 7.5g of allyl alcohol polyoxyethylene ether, 0.8g of sodium hydroxide and 20ml of distilled water to a four-necked flask, and after alkalization at 40°C for 1.5h, slowly add 1.985g of chloroacetic acid (dissolved in 10ml of distilled water) aqueous solution dropwise. After the addition is complete, add 0.8g of sodium hydroxide, raise the temperature to 100°C for 4.0h, filter, distill, and vacuum dry to obtain sodium allyl alcohol polyoxyethylene ether carboxylate (APEC 5 );

[0060] Add 2.0g sodium allyl alcohol polyoxyethylene ether carboxylate, 4.0g itaconic acid and 8.0g distilled water to the four-neck flask, mix well and heat up to 110°C, then slowly add 0.360g (dissolved in 2.0g distilled water) sub Sodium bisulfate and 0.360g (dissolved in 3.0g distilled water) potassium persulfate aqueous solution, the oxidant was added dropwise in 3 batches, and the interval between drops was 10min. After the dropwise addition, react at 110°C for 1.0h, and cool to room tem...

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Abstract

The invention belongs to the technical field of water treatment and provides a preparation method of an olefin ether and unsaturated carboxylic acid copolymer anti-sludging agent. The anti-sludging agent is synthesized through the following steps: (1) adding halogenated acid into a reaction system after the olefin ether is alkalized, raising the temperature to react, filtering, distilling, and drying in vacuum to obtain a carboxylic acid reaction monomer of the olefin ether; (2) raising the temperature and enabling the carboxylic acid reaction monomer of the olefin ether and the unsaturated carboxylic acid to react under the action of an initiator system, and cooling to the room temperature to obtain the olefin ether and unsaturated carboxylic acid copolymer anti-sludging agent. The anti-sludging agent contains a super-hydrophilic polyether structure and a large number of carboxyl, is good in water solubility, reacts easily with calcium ions in a circulating water system, and has an excellent anti-sludging property for calcium carbonate, calcium sulfate and calcium phosphate.

Description

technical field [0001] The invention relates to a preparation method of an olefin ether and unsaturated carboxylic acid copolymer scale inhibitor, which belongs to the scale inhibitor preparation technology in the technical field of water treatment and is suitable for industrial circulating cooling water systems. Background technique [0002] In the field of water treatment, chemical treatment is often used to control the corrosion, scaling, algae, slime and other hazards of water equipment and water pipelines caused by circulating water by adding an appropriate amount of chemical treatment agents to improve cooling. Water cycle ratio, the purpose of saving water resources and reducing waste water discharge. Among a series of chemical treatment chemicals, organophosphorus water treatment chemicals are widely used due to their excellent corrosion and scale inhibition properties, low dosage and low price. Bacteria proliferate. In recent years, large-scale red tides have occu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/10C08F283/06C08F4/40
Inventor 韶晖王雅冷一欣钟璟陈若愚
Owner CHANGZHOU UNIV
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