Super-branched chain reverse osmosis scale inhibitor with net structure as well as preparation method and application of super-branched chain reverse osmosis scale inhibitor

A network structure, hyperbranched chain technology, applied in the field of scale inhibitors, can solve the problems of high content of metal oxides, easy fouling of reverse osmosis membranes, and affect the service life of the membrane, etc., to achieve excellent dispersion performance, improve calcium tolerance, The effect of reducing pollution

Active Publication Date: 2019-04-09
SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the water quality of reused water is much worse than that of conventional surface water or groundwater, therefore, for the reuse of such water quality, especially for some landfill leachate and printing and dyeing wastewater, the water before pretreatment into the membrane is generally treated with biochemical treatment. , high microbial content, after biochemical treatment, the macromolecular organic content of the water is still > 50mg/L, and the film feed water has high hardness, high sulfate radicals, and high m

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030]

[0031] Step 1, mixing polyamino polyether methylene phosphonic acid and hydroxy ethylidene diphosphonic acid in a mass ratio of 2:1. Weigh the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, the mixture of polyamino polyether methylene phosphonic acid and hydroxyl ethylidene diphosphonic acid, and citric acid according to the mass ratio of 2:1:1. Acid, and put the weighed three kinds of raw materials into different containers.

[0032] Step 2: Add pure water with a mass that is 1 times the sum of the mass of the three raw materials weighed in step 1 into the reactor, and add a mixture of acrylic acid and hydroxyethyl acrylate as a crosslinking agent to the pure water. The mass of the agent is 0.6% of the mass of pure water, and hydrochloric acid is added to the pure water, the concentration of the hydrochloric acid in the water is 1 mol / L, and the mixture is stirred evenly.

[0033] Step 3. Control the temperature of the reactor at 40°C, and combine the ...

Example Embodiment

[0037]

[0038] Step 1. Mix the polyamino polyether methylene phosphonic acid with the organic phosphine derivative amino trimethylene phosphonic acid, tetrasodium amino trimethylene phosphonic acid, and pentasodium amino trimethylene phosphonic acid, wherein the polyamino polyether methylene phosphonic acid The mass ratio of phosphonic acid to organic phosphine derivative is 2.5:1. Weigh the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, the above-mentioned mixture of polyamino polyether methylene phosphonic acid and organic phosphine derivatives, and citric acid according to the mass ratio of 2.2:1:0.8 , And put the weighed three kinds of raw materials into different containers.

[0039] Step 2: Add pure water 1.2 times the total mass of the three raw materials weighed in step 1 to the reactor, and add hydroxyethyl acrylate as a crosslinking agent to the pure water. The quality of the crosslinking agent is 0.7% of the mass of the pure water, add hydrochloric...

Example Embodiment

[0044]

[0045] Step 1. Mix the polyamino polyether methylene phosphonic acid with the organic phosphine derivatives hydroxy ethylidene diphosphonic acid and ethylene diamine tetramethylene phosphonic acid, wherein the polyamino polyether methylene phosphonic acid and the organic phosphine The mass ratio of the derivative is 2.2:1. Weigh the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer, the above-mentioned mixture of polyamino polyether methylene phosphonic acid and organic phosphine derivatives, and nitrilotriacetic acid according to the mass ratio of 2.5:1:0.5 , And put the weighed three kinds of raw materials into different containers.

[0046] Step 2. Add pure water 1.5 times the total mass of the three raw materials weighed in step 1 into the reactor, and add hydroxyethyl acrylate, hydroxyethyl methacrylate, and hydroxy methacrylate to the pure water. The propyl ester mixture is used as a cross-linking agent, the mass of the cross-linking agent is 0.5% o...

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PUM

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Abstract

The invention provides a super-branched chain reverse osmosis scale inhibitor with a net structure. The super-branched chain reverse osmosis scale inhibitor is characterized by being prepared from substances containing the following components: the mass ratio of an acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer to a mixture of polyamino polyether methylene phosphonate and organic phosphine derivatives to tricarboxylic acid is (2-2.5):1:(0.5-1); the mass of water is 1-1.5 times as much as the sum of masses of the acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer, the mixture of polyamino polyether methylene phosphonate and organic phosphine derivatives and tricarboxylic acid; the mass of a crosslinking agent is 0.5-1% of the mass of the water; and the concentration of an organic acid catalyst in the water is 0.5-1 mol/L. A scale inhibitor is capable of effectively preventing carbonate, sulfate, metal oxide and silicon dioxide from blocking a reverse osmosis membrane and effectively realizing sterilization.

Description

technical field [0001] The invention relates to the technical field of scale inhibitors, in particular to a network-structured hyperbranched reverse osmosis scale inhibitor and its preparation method and application. Background technique [0002] As people pay more and more attention to water resources, more and more enterprises use reverse osmosis system or nanofiltration system to reuse reclaimed water to reduce emissions. In order to prevent fouling of reverse osmosis system or nanofiltration system, it is necessary Antiscalants are used to inhibit scale in the system. However, because the water quality of reused water is much worse than that of conventional surface water or groundwater, therefore, for the reuse of such water quality, especially for some landfill leachate and printing and dyeing wastewater, the water before pretreatment into the membrane is generally treated with biochemical treatment. , high microbial content, after biochemical treatment, the macromolec...

Claims

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Application Information

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IPC IPC(8): C02F1/44
CPCC02F1/441
Inventor 张金山夏志先谢冰
Owner SHANGHAI FENGXIN ENVIRONMENTAL PROTECTION TECH
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