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Preparation method for compound corrosion-inhibiting scale inhibitor

A technology of corrosion and scale inhibitor and initiator, applied in chemical instruments and methods, descaling and water softening, bathing facility wastewater treatment, etc. Increase and increase the effect of scale inhibition performance

Inactive Publication Date: 2017-10-20
常州环际商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem that the scale inhibitor prepared by the alkali metal salt of orthophosphoric acid consumes too fast, can cause scaling after use, and has poor scale inhibition effect, a composite corrosion and scale inhibitor is provided preparation method

Method used

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  • Preparation method for compound corrosion-inhibiting scale inhibitor

Examples

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Effect test

example 1

[0023] First weigh 20g of glutamic acid and add it to a three-necked flask with a thermometer and a reflux device, move the flask into a heat-collecting thermostatic stirrer, control the temperature of the stirrer at 40°C, and the speed of the stirrer at 220r / min, and then add Add 220mL of water to the flask, stir and mix for 15min, then add 15% sodium hydroxide solution to adjust the pH to 10.8, add 25mL epichlorohydrin dropwise to the flask while stirring, control the dropping time for 30min, and dropwise Afterwards, heat up to 60°C, stir and react for 4 hours, then add 300mL of absolute ethanol to mix and stir for 20min, filter, obtain the filtrate and spray dry to obtain epoxy-modified amino acid, take 12g of methylene succinic acid, 50mL of iso Propanol and 3g tert-butyl hydroperoxide were added to the beaker, the beaker was placed in a water bath, the temperature was controlled at 90°C, and the magnetic stirring reaction was carried out for 3h. After the reaction was comp...

example 2

[0025] First weigh 15g of glutamic acid and add it to a three-necked flask with a thermometer and a reflux device, then move the flask into a heat-collecting thermostatic stirrer, control the temperature of the stirrer at 30°C, and the speed of the stirrer at 200r / min, and then pour it into the flask Add 200mL of water to the flask, stir and mix for 10min, then add 15% sodium hydroxide solution to adjust the pH to 10.5, add 20mL of epichlorohydrin dropwise to the flask while stirring, control the dropping time to 25min, and dropwise Afterwards, heat up to 50°C, stir and react for 3 hours, then add 200mL of absolute ethanol to mix and stir for 15min, filter, obtain the filtrate and spray dry to obtain epoxy-modified amino acid, take 8g of methylene succinic acid, 40mL of iso Propanol and 1g of tert-butyl hydroperoxide were added to the beaker, the beaker was placed in a water bath, the temperature was controlled at 80°C, and the reaction was carried out with magnetic stirring fo...

example 3

[0027] First weigh 17g of glutamic acid and add it to a three-necked flask with a thermometer and a reflux device, move the flask into a heat-collecting constant temperature stirrer, control the temperature of the stirrer at 35°C, and the speed of the stirrer at 210r / min, and then add Add 210mL of water to the flask, stir and mix for 12min, then add 15% sodium hydroxide solution to adjust the pH to 10.7, add 22mL of epichlorohydrin dropwise to the flask while stirring, control the dropping time to 27min, and the dropwise addition is completed Afterwards, heat up to 55°C, stir and react for 4 hours, then add 250mL of absolute ethanol to mix and stir for 17min, filter, obtain the filtrate and spray dry to obtain epoxy-modified amino acid, take 10g of methylene succinic acid, 45mL of iso Propanol and 2g tert-butyl hydroperoxide were added to the beaker, the beaker was placed in a water bath, the temperature was controlled at 85°C, and the magnetic stirring was carried out for 2 ho...

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Abstract

The invention relates to a preparation method for a compound corrosion-inhibiting scale inhibitor, which belongs to the technical field of chemical engineering. According to the preparation method, amino acid as a material is epoxy-modified to add molecular active groups, so that the formation of calcium and magnesium salt can be inhibited, moreover, metal ions are complexed, consequently, a scale inhibition effect is achieved, and the scale inhibitor can also be prevented from being agglomerated; reaction is then carried out with itaconic acid monomer as a material, so that homopolymer is produced, and the two carboxyl groups in the homopolymer which are connected to double bonds can enhance the scale inhibition property, dispersibility and metal corrosion inhibition property of the scale inhibitor; chitosan is then used for coating; when the scale inhibitor gets into water, the chitosan can slowly swell, so that substances therein pass through the holes of the chitosan to get into the water, consequently, the scale inhibitor can be continuously released, and the scale inhibition time is prolonged. The scale inhibitor prepared by the preparation method has a good scale inhibition effect, and also has the characteristic of slow release, so the scale inhibitor does not need to be added in a large amount.

Description

technical field [0001] The invention relates to a preparation method of a composite corrosion and scale inhibitor, which belongs to the technical field of chemical industry. Background technique [0002] Scale inhibitors are a class of agents that can disperse insoluble inorganic salts in water, prevent or interfere with the precipitation and scaling of insoluble inorganic salts on metal surfaces, and maintain good heat transfer effects on metal equipment. The anti-corrosion and anti-scaling agent for cold replacement equipment is made of epoxy resin and specific amino resin as the base material, and is formulated by adding appropriate amount of various additives. It is a single component. It has excellent shielding, anti-seepage, anti-rust properties, good scale resistance, thermal conductivity, excellent resistance to weak acids, strong alkalis, organic solvents, etc. It has strong adhesion, and the film layer is bright, flexible, dense, and hard. . [0003] At present, ...

Claims

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Application Information

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IPC IPC(8): C02F5/12
CPCC02F5/125C02F2103/42C02F2303/08C02F2303/22
Inventor 雷晓燕王维
Owner 常州环际商贸有限公司
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