Reverse osmosis scale inhibitor and preparation method thereof

A scale inhibitor and reverse osmosis technology, applied in reverse osmosis, chemical instruments and methods, osmosis/dialysis water/sewage treatment, etc., can solve problems such as poor scale inhibition performance, membrane fouling, and single performance, and achieve excellent resistance The effect of silica scale performance, simple production process and excellent scale inhibition performance

Pending Publication Date: 2021-10-22
新疆水处理工程技术研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to protect the reverse osmosis system, many enterprises have added pretreatment units at the water source, generally including flocculation, sterilization, filtration and other processes; but due to the control of groundwater use, enterprises generally use surface water, and even enterprises in some regions have to use Reclaimed water is used as the feed water of the reverse osmosis desalination system. These water sources have complex components, high content of metal ions, organic matter, and microorganisms, and the water quality fluctuates greatly. The pretreatment cannot meet the feed water requirements of the reverse osmosis system, resulting in rapid fouling of the reverse osmosis membrane.
[0004] The current technical means also include the use of antiscalants to inhibit scaling, but the performance of reverse osmosis antiscalants on the market is uneven, and the antiscaling performance is not good and the performance is single, mainly considering the problem of scaling
However, the concentration of ions in concentrated water is relatively high, which is easy to breed bacteria and algae and cause membrane fouling. Antiscalants do not have the functions of dispersion, sterilization, and stripping, which cannot meet the safe operation of reverse osmosis systems.

Method used

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  • Reverse osmosis scale inhibitor and preparation method thereof
  • Reverse osmosis scale inhibitor and preparation method thereof
  • Reverse osmosis scale inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]Weigh the following raw materials: 10g of sodium citrate, 15g of hydrolyzed polymaleic anhydride, 20g of polyepoxysuccinate, 10g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 1g of polylactic acid, deionized water 44g.

[0036] After the weighing is completed, pour sodium citrate, hydrolyzed polymaleic anhydride, polyepoxysuccinate and acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer into the reaction kettle for mixing, and add half of the deionized Water, at a temperature of 40°C, stir and dissolve for 2 hours until the liquid becomes viscous; at the same time, dissolve polylactic acid in half of deionized water to obtain a polylactic acid solution;

[0037] Then, the material prepared in the reactor was stirred at a temperature of 70°C, and the polylactic acid solution was added dropwise, and the flow rate was controlled. Store at heat preservation for 3 hours, and finally cool down the material in the reactor to 20°C to obtain t...

Embodiment 2

[0039] Weigh the following raw materials: sodium citrate 11g, hydrolyzed polymaleic anhydride 17g, polyepoxysuccinate 21g, acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer 12g, polylactic acid 2g, deionized water 37g.

[0040] After the weighing is completed, pour sodium citrate, hydrolyzed polymaleic anhydride, polyepoxysuccinate and acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer into the reaction kettle for mixing, and add half of the deionized Water, at a temperature of 45°C, stir and dissolve for 2 hours until the liquid becomes viscous; at the same time, dissolve polylactic acid in half of deionized water to obtain a polylactic acid solution;

[0041] Then, the material prepared in the reactor was stirred at a temperature of 70°C, and the polylactic acid solution was added dropwise, and the flow rate was controlled. Store at heat preservation for 3 hours, and finally cool down the material in the reactor to 20°C to obtain the reverse osm...

Embodiment 3

[0043] Weigh the following raw materials: 12g of sodium citrate, 20g of hydrolyzed polymaleic anhydride, 22g of polyepoxysuccinate, 13g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 3g of polylactic acid, deionized water 30g.

[0044] After the weighing is completed, pour sodium citrate, hydrolyzed polymaleic anhydride, polyepoxysuccinate and acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer into the reaction kettle for mixing, and add half of the deionized Water, at a temperature of 50°C, stir and dissolve for 2.5 hours until the liquid becomes viscous; at the same time, dissolve polylactic acid in half of deionized water to obtain a polylactic acid solution;

[0045] Then the materials prepared in the reactor were stirred at a temperature of 75°C, and the polylactic acid solution was added dropwise, the flow rate was controlled, and the dropping time was 5.5 hours; after the addition was completed, the stirring was continued for 1 hour, ...

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Abstract

The invention provides a reverse osmosis scale inhibitor and a preparation method thereof, and the reverse osmosis scale inhibitor is mainly prepared from the following raw materials in parts by mass: 10 to 15 parts of sodium citrate, 15 to 25 parts of hydrolytic polymaleic anhydride, 20 to 25 parts of polyepoxysuccinate, 10 to 15 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, 1 to 5 parts of polylactic acid and 15 to 44 parts of deionized water. The reverse osmosis scale inhibitor disclosed by the invention has good scale inhibition performance on silicon scale and calcium scale, is high in scale inhibition performance, environment-friendly, stable in property and long in storage period, and can ensure long-period stable operation of a system.

Description

technical field [0001] The invention relates to the technical field of water treatment chemicals, in particular to a reverse osmosis scale inhibitor and a preparation method thereof. Background technique [0002] With the advancement of membrane technology, reverse osmosis water treatment technology has been widely used in the advanced treatment of water supply and sewage reuse in the power, food, electronics, and chemical industries. The reverse osmosis membrane is the core component of the desalinated water system. During the long-term operation of the reverse osmosis equipment, when the insoluble salts and colloids are continuously concentrated in the membrane element and exceed their solubility limit, they will be in the reverse osmosis membrane. Scaling occurs on the surface, causing membrane fouling. The higher the recovery rate of desalinated water, the greater the risk of scaling. In the reverse osmosis (RO) system, the common insoluble salt is CaSO 4 , CaCO 3 and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02B01D65/02C02F1/44C02F1/66C02F5/10
CPCB01D61/025B01D65/02C02F5/10C02F1/66C02F1/441
Inventor 余莉陈晓青艾山·玉素莆宋勇
Owner 新疆水处理工程技术研究中心有限公司
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