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A high-efficiency composite silicate scale inhibitor and dispersant

A scale-inhibiting dispersant and composite technology, applied in scale removal and water softening, chemical instruments and methods, water/sludge/sewage treatment, etc., to improve scale-inhibiting efficiency, benefit environmental protection, and overcome scale-inhibiting effects bad effect

Active Publication Date: 2019-08-16
陕西延长青山科技工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the problems existing in existing silica scale scale inhibitors, and to provide a composite silicate scale scale inhibitor dispersant that is biodegradable, less in dosage and high in scale inhibition efficiency

Method used

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  • A high-efficiency composite silicate scale inhibitor and dispersant
  • A high-efficiency composite silicate scale inhibitor and dispersant
  • A high-efficiency composite silicate scale inhibitor and dispersant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] At normal temperature, 48.5g of prenyl alcohol polyoxyethylene ether / maleic acid / acrylic acid copolymer with a solid content of 33.2% (i.e. the reddish-brown transparent liquid prepared in Example 4 in CN104262546A, M in formula I 1 , M 2 , M 3 , M 4 Both are Na + , R 1 =R 2 =CH 3 , R 3 =H, n is 16, x is 2.8%, y is 48.1%, z is 49.1%, the viscosity of this copolymer is 12.3Pa.s, the number average molecular weight is about 6213, polydispersity index is 1.36, is abbreviated as TPEG / MA / AA), 16.0g tannic acid, 35.5g water are mixed, stir evenly, obtain composite silicon scale antiscaling dispersant, wherein the effective concentration of TPEG / MA / AA and tannic acid is 16%.

Embodiment 2

[0026] 72.5g of prenyl polyoxyethylene ether / maleic acid / acrylic acid copolymer (TPEG / MA / AA, the same as Example 1), 8.0g of tannic acid, and 19.5g of 33.2% solid content were mixed and stirred evenly , to obtain a composite silica scale antiscaling dispersant, wherein the effective concentrations of TPEG / MA / AA and tannic acid are 24% and 8% respectively.

Embodiment 3

[0028] 85.0g of prenol polyoxyethylene ether / maleic acid / acrylic acid copolymer (TPEG / MA / AA, same as Example 1) with a solid content of 33.2%, 4.0g of tannic acid, and 11.0g were mixed and stirred evenly , to obtain a composite silica scale antiscaling dispersant, wherein the effective concentrations of TPEG / MA / AA and tannic acid are 28% and 4% respectively.

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Abstract

The invention discloses a high-efficiency composite anti-silicate-scale dispersing agent. The antiscale dispersing agent is compounded from an alkenyl polyoxyethylene ether / maleic anhydride / acrylic acid copolymer and tannic acid, wherein the alkenyl polyoxyethylene ether / maleic anhydride / acrylic acid copolymer contains polyether groups with high hydrophilicity and abundant carboxylate ions capable of being effectively chelated with calcium and magnesium ions, and thus, has obvious properties for preventing silicon dioxide in water from deposition; and the compounding of the tannic acid and alkenyl polyoxyethylene ether / maleic anhydride / acrylic acid copolymer can obviously enhance the silicon dioxide scale resistance of the alkenyl polyoxyethylene ether / maleic anhydride / acrylic acid copolymer, has obvious anti-silicate-scale synergistic effects, and can effectively prevent silicon dioxide and silicates from deposition, thereby lowering the agent consumption and enhancing the antiscale efficiency. The dispersing agent according to the formula is free of phosphorus, is biodegradable, and thus, is beneficial to environmental protection. The dispersing agent solves the problem of water eutrophication caused by the agent, and is an environment-friendly water treating agent.

Description

technical field [0001] The invention belongs to the technical field of industrial water treatment, and in particular relates to an antiscaling and dispersing agent capable of inhibiting the deposition of silicon dioxide in water. Background technique [0002] Silicon is one of the most abundant elements on the earth, and it is also the most common colloidal substance in the water environment. The solubility in water is usually between 150 and 180 mg / L. Silica scale including SiO 2 Scale and silicate scale, the former is mainly amorphous scale, and the latter mainly refers to magnesium silicate scale, which is also amorphous in general. L.Dubin and others have studied the control of high silicon water deposition, and believe that there are three mechanisms for the generation of silicon scale: (1) Silicic acid condensation to form colloidal amorphous SiO 2 Produce deposition; (2) SiO 2 After the colloid is destroyed, it will coagulate and form scale; (3) silicic acid or sil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/12C02F101/10
CPCC02F5/12C02F2101/10
Inventor 张国辉杨鸿鹰邱利平王丽莉张玉娟殷旭任蕊
Owner 陕西延长青山科技工程股份有限公司