Corrosion and scale inhibitor for cooling water in petrochemical industry

A technology of corrosion and scale inhibitors and corrosion inhibitors, which is applied in the field of high-efficiency composite corrosion and scale inhibitors and cooling water scale and corrosion inhibitors. It can solve the problems that calcium phosphate scale cannot be effectively inhibited and improve the reuse rate. , best market value and environmental protection value, excellent corrosion and scale inhibition performance

Active Publication Date: 2012-07-25
山东京博众诚清洁能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The existing main method to improve circulating cooling water is to add compound corrosion and scale inhibitors for water treatment. However, although the compound corrosion and scale inhibitors in the prior art can effectively prevent corrosion and scaling of equipment, due to Organic phosphorus cannot effectively inhibit calcium phosphate scale and iron oxide precipitation, etc., and phosphorus-containing compounds are easy to nourish bacteria and algae, making environmental water eutrophication. Therefore, it has once again been confirmed that the development of low-phosphorus or phosphorus-free environmentally friendly composite corrosion and scale inhibitors is the future. Important Research Directions for Development

Method used

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  • Corrosion and scale inhibitor for cooling water in petrochemical industry

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Effect test

Embodiment 1

[0026] The specific component distribution ratio of the slow-release scale inhibitor is: 30g 2-phosphonobutane-1,2,4-tricarboxylic acid, 1g zinc chloride, 28.6g sodium ethylenediamine tetramethylene phosphonate, 0.5 g sodium hexametaphosphate, 20g sodium polyepoxysuccinate, 5g citric acid, 2g polyoxyethylene ether imidazoline, 45g deionized water.

[0027] The specific preparation process is: first add organic carboxylate corrosion and scale inhibitor, then add zinc salt; after the zinc salt is fully dissolved, then add organic polyphosphonic acid corrosion and scale inhibitor, polymer scale inhibitor, metal ion Chelating agent, surfactant, and finally add deionized water to the prescription amount, stir and mix thoroughly to obtain the compound product - slow-release scale inhibitor A.

Embodiment 2

[0029] The specific component distribution ratio of the slow-release scale inhibitor is: 30g 2-phosphonobutane-1,2,4-tricarboxylic acid, 2g zinc chloride, 20g sodium ethylenediamine tetramethylene phosphonate, 10g poly Sodium epoxy succinate, 1g sodium hexametaphosphate, 2g citric acid, 4g polyoxyethylene ether imidazoline, 41.5g deionized water.

[0030] The specific preparation process is: first add organic carboxylate corrosion and scale inhibitor, then add zinc salt; after the zinc salt is fully dissolved, then add organic polyphosphonic acid corrosion and scale inhibitor, polymer scale inhibitor, metal ion Chelating agent, surfactant, and finally add deionized water to the prescription amount, stir and mix thoroughly to obtain the compound product - slow-release scale inhibitor B.

Embodiment 3

[0032]The specific component distribution ratio of the slow-release scale inhibitor is: 20g 2-phosphonobutane-1,2,4-tricarboxylic acid, 0.5g zinc chloride, 5g sodium ethylenediamine tetramethylene phosphonate, 8g Sodium polyepoxysuccinate, 0.2g sodium hexametaphosphate, 0.5g citric acid, 1g polyoxyethylene ether imidazoline, 40g deionized water.

[0033] The specific preparation process is: first add organic carboxylate corrosion and scale inhibitor, then add zinc salt; after the zinc salt is fully dissolved, then add organic polyphosphonic acid corrosion and scale inhibitor, polymer scale inhibitor, metal ion Chelating agent, surfactant, and finally add deionized water to the prescription amount, stir and mix thoroughly to obtain the compound product - slow-release scale inhibitor C.

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Abstract

The invention belongs to the technical field of chemical industry, and relates to a cooling water corrosion inhibitor, in particular to an efficient composite corrosion and scale inhibitor which can remarkably reduce corrosion and scaling phenomena of the cooling water of a petrochemical system. The corrosion and scale inhibitor is prepared by evenly mixing organic phosphine carboxylic acid corrosion inhibitor, organic multi-element phosphine acid corrosion and scale inhibitor, polymer scale inhibitor, metal ion succimer, surface active agent, zinc salt, functionality additive and water. The corrosion and scale inhibitor prepared from the components has low phosphine content and excellent corrosion and scale inhibition performance, can prolong the service life of devices, improve the repeated utilization rate of cooling water and reduce the water resource consumption.

Description

technical field [0001] The invention relates to the technical field of chemical industry, and relates to a cooling water scale and corrosion inhibitor, in particular to a high-efficiency composite corrosion and scale inhibitor which can significantly reduce the corrosion and scaling phenomenon of cooling water in a petrochemical system. Background technique [0002] In the petrochemical industry, circulating cooling water accompanies the whole process of production, accounting for 70% to 80% of the total water consumption. Due to the continuous evaporation and concentration of the circulating cooling water, the scale and corrosion of the circulating cooling water are relatively serious, and it is easy to breed bacteria and algae, which will affect the heat transfer effect of the equipment and reduce the service life of the equipment. Therefore, to improve the reuse rate of industrial water, it is necessary to carry out water quality treatment on circulating cooling water to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/14
CPCC23F11/08C23F14/02
Inventor 王雪马韵升史庆苓栾波张建林牟庆平
Owner 山东京博众诚清洁能源有限公司
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