Ecological water treatment chemical with both corrosion inhibition and scale inhibition performances

An ecological and water treatment technology, applied in the field of water treatment, can solve the problems of unsatisfactory corrosion inhibition effect, high consumption of ammonia water, and many phosphorus-containing chemicals, and achieve excellent corrosion and scale inhibition performance and good application prospects

Active Publication Date: 2018-12-18
LANZHOU JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the invention involves many phosphorus-containing agents, and the organic solvents are toxic substances such as toluene, which is not conducive to the personal safety of the experimenters, and puts pressure on the protection of the ecological environment, and once industrialized production will be caused by the recovery of phosphorus. Additional economic loss; patent CN105621641A provides a compound scale inhibitor of polyaspartic acid and ethylenediamine tetramethylene phosphonic acid, the raw materials used in this product include: maleic anhydride 26% to 28% , 51% to 53% ammonia water, 2% mixture of iron oxide and nickel oxide, 13% ethylenediamine tetramethylene phosphonic acid, and the balance is sodium hydroxide aqueous solution, which is produced by mixing at a certain temperature. Aspartic acid and ethylenediaminetetramethylenephosphonic acid compound scale inhibitor, the consumption of raw material a

Method used

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  • Ecological water treatment chemical with both corrosion inhibition and scale inhibition performances
  • Ecological water treatment chemical with both corrosion inhibition and scale inhibition performances
  • Ecological water treatment chemical with both corrosion inhibition and scale inhibition performances

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Dissolve 9.8g of maleic anhydride in 20ml of distilled water at 60°C, add 6.72g of ammonium carbonate in portions in an ice-water bath, heat up to 90°C after dissolving, and perform amination and hydrolysis for 1.0h to obtain a white paste-like substance called maleic anhydride. amine. Then the temperature was raised to 180° C., and the high-temperature thermal polycondensation reaction was carried out for 1.0 h to obtain unpurified orange-yellow brittle solid PSI.

[0060] Weigh the above 15.0g PSI, dissolve it with 60ml N,N-dimethylformamide (DMF), stir it in a constant temperature water bath at 40°C for 4 hours, filter it with suction, discard the residue, add absolute ethanol, and precipitate Analyze for 30 minutes, then filter with Buchner funnel, the filter cake is purified PSI, and the filtrate is recovered.

[0061] Weigh 15.2g of ethyl benzoylacetate (EBA) and 8g of NaOH into 186ml of water, add 9.7g of purified PSI after reacting for 50min, and react for anot...

Embodiment 2

[0065] Dissolve 9.8g of maleic anhydride in 20ml of distilled water at 60°C, add 5.76g of ammonium carbonate in portions in an ice-water bath, heat up to 80°C after dissolution, and perform amination and hydrolysis for 2.0 hours to obtain a white paste-like substance called maleic anhydride. amine. Then the temperature was raised to 165° C., and the high-temperature thermal polycondensation reaction was carried out for 1.5 h to obtain unpurified orange-yellow brittle solid PSI.

[0066] Weigh the above 15.0g PSI, dissolve it with 60ml N,N-dimethylformamide (DMF), stir it in a constant temperature water bath at 40°C for 4 hours, filter it with suction, discard the residue, add absolute ethanol, and precipitate Analyze for 30 minutes, then filter with Buchner funnel, the filter cake is purified PSI, and the filtrate is recovered.

[0067] Weigh 10.4g of EBA and 4.8g of NaOH into 141ml of water, react for 30 minutes, add 9.7g of purified PSI, and react for another 18 hours to ob...

Embodiment 3

[0071] Dissolve 9.8g of maleic anhydride in 20ml of distilled water at 60°C, add 6.72g of ammonium carbonate in portions in an ice-water bath, heat up to 85°C after dissolving, and perform amination and hydrolysis for 1.5h to obtain a white paste-like substance called maleic anhydride. amine. Then the temperature was raised to 170° C., and the high-temperature thermal polycondensation reaction was carried out for 1.2 hours to obtain unpurified orange-yellow brittle solid PSI.

[0072] Weigh the above 15.0g PSI, dissolve it with 60ml N,N-dimethylformamide (DMF), stir it in a constant temperature water bath at 40°C for 4 hours, filter it with suction, discard the residue, add absolute ethanol, and precipitate Analyze for 30 minutes, then filter with Buchner funnel, the filter cake is purified PSI, and the filtrate is recovered.

[0073] Weigh 12.8g of EBA and 6.4g of NaOH into 164ml of water, react for 40min, add 9.7g of purified PSI, react for another 20 hours, and obtain a re...

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PUM

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Abstract

The invention discloses an ecological water treatment chemical with both corrosion inhibition and scale inhibition performances. The ecological water treatment chemical comprises beta-dicarbonyl compound modified polyaspartic acid used as a main agent, and sodium molybdate, hydroxyethylidene diphosphonic acid and zinc salts used as auxiliary agents. The ecological water treatment chemical of the invention can be applied to a circulating cooling water treatment system, and has excellent corrosion and scale inhibition performances; the chemical has a calcium carbonate inhibition rate of 100% andan annual A3 carbon steel corrosion rate of less than 0.075 mm; the concentration of Zn<2+> in discharged water is 0-1.5 mg/L, and the content of phosphorus in the discharged water is 0-0.05 mg/L; soharm to the environment due to high contents of phosphorus and zinc is avoided, and increasingly strict environmental protection requirements are met.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to an ecological water treatment chemical with both corrosion inhibition and scale inhibition properties. Background technique [0002] For a long time, the shortage of water resources and low reuse rate have been a major problem facing our country. In order to better save water resources, the industry usually uses circulating cooling water technology to reuse water resources. Although this method can save water, scaling and corrosion will occur during the water cycle, which will affect the normal use of equipment in industrial production. To address the above corrosion and scaling problems, adding scale and corrosion inhibitors to the circulating cooling water system is currently the most common and effective method. [0003] With the increasing demand for environmentally friendly water treatment chemicals in industrial circulating cooling water systems, polyaspartic aci...

Claims

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Application Information

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IPC IPC(8): C02F5/14
CPCC02F5/145C02F2303/08C23F11/08C23F14/02
Inventor 杨玉华张庚尹召龙王欢胡正海李一正刘潘勤
Owner LANZHOU JIAOTONG UNIV
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