Preparation method of phosphorus-free reverse osmosis scale inhibitor

A scale inhibitor and reverse osmosis technology, applied in the field of preparation of phosphorus-free reverse osmosis scale inhibitor, can solve the problems of single function, low scale inhibition performance, uneven product performance, etc., to improve the ability, not easy to deposit, The effect of preventing fouling on the membrane surface

Inactive Publication Date: 2021-01-19
山东普尼奥水处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of phosphorus-free reverse osmosis antiscalant, which has the advantages of preventing fouling of the membrane surface, preventing fouling of the reverse osmosis membrane, and the components do not contain phosphorus, and will not pollute the environment. The main reverse osmosis antiscalants include the products of Kinglee Company, Argo Company, and FMC Company of the United States, and there are also some domestic products. The performance of the products is uneven, the antiscalant performance is not high, and the function is single

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of phosphorus-free reverse osmosis scale inhibitor comprises the following steps:

[0026] S1, take a certain amount of maleic anhydride and put it into a 250mL four-necked flask equipped with a thermometer, a stirrer, and a condenser;

[0027] S2. Add a certain amount of ammonia water in proportion to start the stirrer, wherein maleic anhydride is 30%, ammonia water is 70%, and cooling water is passed at the same time, the reaction begins to emit a large amount of heat, and when the temperature is about 60 ° C, a milky white turbid liquid is obtained. Continue Stir evenly for a period of time, the suspended matter is completely dissolved, and becomes a clear and slightly yellow homogeneous solution. After adding ammonia water, the temperature rises to 90°C, then cools down to 70°C, then keeps it for 1 hour, and then raises the temperature to 90°C , at this time, the condenser tube is removed to evaporate the water molecules and excess ammonia mol...

Embodiment 2

[0033] The preparation method of phosphorus-free reverse osmosis scale inhibitor comprises the following steps:

[0034] S1, take a certain amount of maleic anhydride and put it into a 250mL four-necked flask equipped with a thermometer, a stirrer, and a condenser;

[0035] S2. Add a certain amount of ammonia water in proportion to start the stirrer, wherein maleic anhydride is 30%, ammonia water is 70%, and cooling water is passed at the same time, the reaction begins to emit a large amount of heat, and when the temperature is about 60°C, a milky white turbid liquid is obtained. Continue Stir evenly for a period of time, the suspended matter is completely dissolved, and becomes a clear and slightly yellow homogeneous solution. After adding ammonia water, the temperature rises to 90°C, then cools down to 65°C and keeps it for 1 hour, then raises the temperature to 90°C , at this time, the condenser tube is removed to evaporate the water molecules and excess ammonia molecules; ...

Embodiment 3

[0041] The preparation method of phosphorus-free reverse osmosis scale inhibitor comprises the following steps:

[0042] S1, take a certain amount of maleic anhydride and put it into a 250mL four-necked flask equipped with a thermometer, a stirrer, and a condenser;

[0043] S2. Add a certain amount of ammonia water in proportion to start the stirrer, wherein maleic anhydride is 30%, ammonia water is 70%, and cooling water is passed at the same time, the reaction begins to emit a large amount of heat, and when the temperature is about 60°C, a milky white turbid liquid is obtained. Continue Stir evenly for a period of time, the suspended matter is completely dissolved, and becomes a clear and slightly yellow homogeneous solution. After adding ammonia water, the temperature rises to 90°C, then cools down to 70°C, then keeps it for 1 hour, and then raises the temperature to 90°C , at this time, the condenser tube is removed to evaporate the water molecules and excess ammonia molec...

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Abstract

The invention discloses a preparation method of a phosphorus-free reverse osmosis scale inhibitor. The preparation method comprises the following steps: weighing a certain amount of maleic anhydride and putting maleic anhydride into a four-neck flask; adding a certain amount of ammonia water in proportion, starting a stirrer, and heating to evaporate water molecules and redundant ammonia molecules; raising the temperature to 120 DEG C, enabling the reaction solution to become turbid, adding a catalyst until the solution becomes light red and then becomes orange, and increasing the viscosity; heating to 150 DEG C, keeping the temperature for a period of time, and cooling to room temperature to obtain a brittle orange solid, namely polysuccinimide; suspending polysuccinimide in water, adding2-aminoethanesulfonic acid and sodium hydroxide, and stirring in an ice bath to obtain a sulfonic acid group-containing polyaspartic acid grafted copolymer; forming the reverse osmosis scale inhibitor by compounding a sulfonic acid group-containing polyaspartic acid graft copolymer, a scale inhibitor and a dispersing agent according to a certain ratio. The invention has the advantages that the membrane surface is prevented from scaling, the reverse osmosis membrane is prevented from being polluted and blocked, the components do not contain phosphorus, and the environment is not polluted.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a preparation method of a phosphorus-free reverse osmosis scale inhibitor. Background technique [0002] Antiscalant for reverse osmosis is a scale inhibitor specially used for reverse osmosis systems, nanofiltration and ultrafiltration systems, which can prevent scaling on the membrane surface, improve water production and water quality, and reduce operating costs. With the advancement of membrane science and technology, reverse osmosis water treatment technology has been widely used in electric power, food, electronics, and chemical industries, and has a wide range of applications in the fields of advanced treatment of industrial water supply and sewage reuse. The reverse osmosis membrane is the key equipment of the reverse osmosis system. When the system runs continuously for a long time, the calcium and magnesium plasma in the water will continuously precipitate and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/12C08G73/10
CPCC02F5/12C08G73/1092
Inventor 李其涛马百法
Owner 山东普尼奥水处理有限公司
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