CN112811620A - Low-phosphorus scale and corrosion inhibitor for circulating water - Google Patents

Low-phosphorus scale and corrosion inhibitor for circulating water Download PDF

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Publication number
CN112811620A
CN112811620A CN202110004780.7A CN202110004780A CN112811620A CN 112811620 A CN112811620 A CN 112811620A CN 202110004780 A CN202110004780 A CN 202110004780A CN 112811620 A CN112811620 A CN 112811620A
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China
Prior art keywords
phosphorus
low
corrosion
scale
acid
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CN202110004780.7A
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Chinese (zh)
Inventor
梁新新
张留成
郭翠娟
徐旭东
耿俊玲
刘娅林
郑萍
范春燕
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SHANDONG TIANQING TECHNOLOGY DEVELOPMENT CO LTD
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SHANDONG TIANQING TECHNOLOGY DEVELOPMENT CO LTD
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Priority to CN202110004780.7A priority Critical patent/CN112811620A/en
Publication of CN112811620A publication Critical patent/CN112811620A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
    • C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C02F5/105—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances combined with inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/08—Corrosion inhibition

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Abstract

A low-phosphorus scale and corrosion inhibitor for circulating water comprises the following substances in percentage by weight: 20 to 25 percent of carboxyethyl sulfosuccinic acid, 15 to 20 percent of 2-phosphonic acid-1, 2, 4-tricarboxybutane, 3 to 6 percent of anhydrous zinc chloride, 5 to 8 percent of polyepoxysuccinic acid, 10 to 15 percent of hydrolyzed polymaleic anhydride, 5 to 10 percent of polyamino polyether methylene phosphonic acid and the balance of water. The composite low-phosphorus corrosion and scale inhibitor prepared by the invention can lead total phosphorus (in PO) in circulating water to be reduced because only PBTCA contains lower content of phosphorus and the dosage is less4 3‑Calculated) the content is less than 2 mg/L; therefore, the composite low-phosphorus corrosion and scale inhibitor prepared by the invention has low phosphorus content, reduces the discharge of phosphorus, lightens the pollution to the environment, has main components which are easily biodegraded, is an environment-friendly corrosion and scale inhibitor, has better environmental protection property, excellent scale and corrosion inhibition performance and good application prospect.

Description

Low-phosphorus scale and corrosion inhibitor for circulating water
Technical Field
The invention belongs to the field of scale and corrosion inhibitors, and particularly relates to a low-phosphorus scale and corrosion inhibitor for circulating water and a preparation method thereof.
Background
Phosphorus based formulations have been applied for more than 30 years since the mid 70 s of the 20 th century. Because the phosphorus water treatment agent is low in price and has good corrosion and scale inhibition performance, the phosphorus water treatment agent still occupies an absolute dominant position in water treatment at present. At present, China pays more and more attention to environmental protection, and has stricter requirements on the quality of sewage of chemical enterprises, so that a corrosion and scale inhibitor used by a circulating cooling water system needs to be continuously updated to adapt to new environmental requirements, and a traditional high-phosphorus formula is replaced by a low-phosphorus formula. The invention analyzes the feasibility of the low-phosphorus formula corrosion and scale inhibitor and obtains good effect when being applied to a circulating water system.
Disclosure of Invention
The invention provides a low-phosphorus scale and corrosion inhibitor for circulating water, which is used for overcoming the defects in the prior art.
The invention is realized by the following technical scheme:
a low-phosphorus scale and corrosion inhibitor for circulating water comprises the following substances in percentage by weight:
Figure BDA0002882765050000011
the low-phosphorus scale and corrosion inhibitor for circulating water is deionized water.
The preparation method of the low-phosphorus scale and corrosion inhibitor for circulating water comprises the following steps:
the method comprises the following steps: accurately weighing carboxyethyl thiosuccinic acid, 2-phosphonic acid-1, 2, 4-tricarboxybutane, anhydrous zinc chloride, polyepoxysuccinic acid, hydrolyzed polymaleic anhydride, polyamino polyether methylene phosphonic acid and water;
step two: adding a part of water, sequentially stirring and adding carboxyethyl sulfosuccinic acid, 2-phosphonic acid group-1, 2, 4-tricarboxybutane, anhydrous zinc chloride, polyepoxysuccinic acid, hydrolyzed polymaleic anhydride and polyamino polyether methylene phosphonic acid, supplementing water to a preset amount according to requirements, and continuously stirring until the solution is transparent to obtain the low-phosphorus scale and corrosion inhibitor.
The invention has the advantages that: the composite low-phosphorus corrosion and scale inhibitor prepared by the invention can lead total phosphorus (in PO) in circulating water to be reduced because only PBTCA contains lower content of phosphorus and the dosage is less4 3-Calculated) the content is less than 2 mg/L; therefore, the composite low-phosphorus corrosion and scale inhibitor prepared by the invention has low phosphorus content, reduces the discharge of phosphorus, lightens the pollution to the environment, has main components which are easily biodegraded, is an environment-friendly corrosion and scale inhibitor, has better environmental protection property, excellent scale and corrosion inhibition performance and good application prospect.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
42kg of deionized water is added into a reactor, 10kg of hydrolyzed polymaleic anhydride, 5kg of polyepoxysuccinic acid, 20kg of carboxyethyl sulfosuccinic acid, 15kg of 2-phosphonic acid-1, 2, 4-tricarboxybutane, 5kg of polyamino polyether methylene phosphonic acid and 3kg of anhydrous zinc chloride are sequentially added, and a stirrer is started to stir until the solution is bright, so that the composite efficient low-phosphorus corrosion and scale inhibitor is prepared.
Example 2
Adding 32kg of deionized water into a reactor, sequentially adding 12kg of hydrolyzed polymaleic anhydride, 6kg of polyepoxysuccinic acid, 20kg of carboxyethylsulfosuccinic acid, 18kg of 2-phosphonic acid-1, 2, 4-tricarboxybutane, 7kg of polyamino polyether methylene phosphonic acid and 5kg of anhydrous zinc chloride, and stirring by using a stirrer until the solution is bright to obtain the composite efficient low-phosphorus corrosion and scale inhibitor.
Example 3
Adding 29kg of deionized water into a reactor, sequentially adding 13kg of hydrolyzed polymaleic anhydride, 6kg of polyepoxysuccinic acid, 22kg of carboxyethyl sulfosuccinic acid, 20kg of 2-phosphonic acid-1, 2, 4-tricarboxybutane, 5kg of polyamino polyether methylene phosphonic acid and 5kg of anhydrous zinc chloride, and stirring by using a stirrer until the solution is bright to obtain the composite efficient low-phosphorus corrosion and scale inhibitor.
Example 4
Adding 32kg of deionized water into a reactor, sequentially adding 10kg of hydrolyzed polymaleic anhydride, 7kg of polyepoxysuccinic acid, 23kg of carboxyethyl sulfosuccinic acid, 17kg of 2-phosphonic acid-1, 2, 4-tricarboxybutane, 7kg of polyamino polyether methylene phosphonic acid and 4kg of anhydrous zinc chloride, and stirring by using a stirrer until the solution is bright to obtain the composite efficient low-phosphorus corrosion and scale inhibitor.
Example 5
Adding 16kg of deionized water into a reactor, sequentially adding 15kg of hydrolyzed polymaleic anhydride, 8kg of polyepoxysuccinic acid, 25kg of carboxyethyl sulfosuccinic acid, 20kg of 2-phosphonic acid-1, 2, 4-tricarboxybutane, 10kg of polyamino polyether methylene phosphonic acid and 6kg of anhydrous zinc chloride, and stirring by using a stirrer until the solution is bright to obtain the composite efficient low-phosphorus corrosion and scale inhibitor.
The composite high-efficiency low-phosphorus corrosion and scale inhibitor prepared in the embodiment 1-4 of the invention is compared with polyepoxysuccinic acid, hydrolyzed polymaleic anhydride, polyamino polyether methylene phosphate, carboxyethyl sulfosuccinic acid and SQ-1038 of the company for experiments, and the scale inhibition experiments are carried out according to GB/T16632-2008 'determination of scale inhibition performance of water treatment agents by calcium carbonate deposition method'; according to a rotating coupon method for measuring the slow release performance of the water treatment agent in GB/T18175-2014 in a corrosion test, the #20 carbon steel is selected as a test piece; the experimental results are shown in table one.
Figure BDA0002882765050000041
Watch 1
In conclusion, the scale inhibition rate and the corrosion rate of the composite low-phosphorus corrosion and scale inhibitor are superior to those of the existing products, the phosphorus content of the composite low-phosphorus corrosion and scale inhibitor prepared by the invention is low, the phosphorus emission is reduced, the environmental pollution is reduced, the main components are easily biodegraded, the composite low-phosphorus corrosion and scale inhibitor has good environmental protection property, excellent scale inhibition and corrosion inhibition performance and good application prospect.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (3)

1. A low-phosphorus scale and corrosion inhibitor for circulating water is characterized in that: comprises the following substances in percentage by weight:
Figure FDA0002882765040000011
2. the low-phosphorus scale and corrosion inhibitor for circulating water according to claim 1, which is characterized in that: the water is deionized water.
3. The low-phosphorus scale and corrosion inhibitor for circulating water according to claim 1, which is characterized in that: the preparation method comprises the following steps:
the method comprises the following steps: accurately weighing carboxyethyl thiosuccinic acid, 2-phosphonic acid-1, 2, 4-tricarboxybutane, anhydrous zinc chloride, polyepoxysuccinic acid, hydrolyzed polymaleic anhydride, polyamino polyether methylene phosphonic acid and water;
step two: adding a part of water, sequentially stirring and adding carboxyethyl sulfosuccinic acid, 2-phosphonic acid group-1, 2, 4-tricarboxybutane, anhydrous zinc chloride, polyepoxysuccinic acid, hydrolyzed polymaleic anhydride and polyamino polyether methylene phosphonic acid, supplementing water to a preset amount according to requirements, and continuously stirring until the solution is transparent to obtain the low-phosphorus scale and corrosion inhibitor.
CN202110004780.7A 2021-01-04 2021-01-04 Low-phosphorus scale and corrosion inhibitor for circulating water Pending CN112811620A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102674570A (en) * 2011-03-15 2012-09-19 中国石油化工股份有限公司 Composite low-phosphorus corrosion and scale inhibitor and application thereof
CN107473408A (en) * 2017-08-16 2017-12-15 鞍钢贝克吉利尼水处理有限公司 Low-phosphorous environment-friendly corrosion inhibiting and descaling agent and preparation method applied to low-temperature circulating water system
CN107473409A (en) * 2017-09-12 2017-12-15 山东天庆科技发展有限公司 A kind of recirculated cooling water ultra-high magnifications operation dirt dispersion agent
CN109748402A (en) * 2017-11-03 2019-05-14 中国石油化工股份有限公司 The processing method of low-phosphorous composite slow-corrosion scale resistor and its application and recirculated cooling water
CN110818101A (en) * 2018-08-14 2020-02-21 江苏皇冠鸟生物科技股份有限公司 Low-phosphorus composite corrosion and scale inhibitor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102674570A (en) * 2011-03-15 2012-09-19 中国石油化工股份有限公司 Composite low-phosphorus corrosion and scale inhibitor and application thereof
CN107473408A (en) * 2017-08-16 2017-12-15 鞍钢贝克吉利尼水处理有限公司 Low-phosphorous environment-friendly corrosion inhibiting and descaling agent and preparation method applied to low-temperature circulating water system
CN107473409A (en) * 2017-09-12 2017-12-15 山东天庆科技发展有限公司 A kind of recirculated cooling water ultra-high magnifications operation dirt dispersion agent
CN109748402A (en) * 2017-11-03 2019-05-14 中国石油化工股份有限公司 The processing method of low-phosphorous composite slow-corrosion scale resistor and its application and recirculated cooling water
CN110818101A (en) * 2018-08-14 2020-02-21 江苏皇冠鸟生物科技股份有限公司 Low-phosphorus composite corrosion and scale inhibitor

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Application publication date: 20210518