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Combinational antisludging agent and preparation method thereof

A kind of antiscalant and antiscaling technology, which is applied in the field of antiscalant, can solve the problems of membrane device pollution, etc., and achieve the effect of high antiscaling efficiency, less dosage, prolonging life and service cycle

Inactive Publication Date: 2010-12-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the pollution of the membrane device by pollutants during operation, CaCO is generated on the surface 3 , Ca 3 (PO 4 ) 2 , CaSO 4 , BaSO 4 , SrSO 4 , metal oxides and silicon scale deposits, the present invention provides a multifunctional scale inhibitor to prevent their formation, especially suitable for preventing the formation of silicon scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: the preparation of scale inhibitor

[0025] The scale inhibitor of the present invention is prepared in a four-necked flask equipped with a heating device, a condensation reflux device, a stirring device and a temperature indicating device. Add various antiscalant agents and additives in proportion to the four-neck flask. After the solid material is completely dissolved, heat up to a certain temperature. Stir and mix evenly and keep it for a certain period of time. Stop heating, adjust the solid content with water, and cool down. to normal temperature to obtain the scale inhibitor of the present invention.

example 1

[0027] Polymer antiscalant: acrylic acid, methyl acrylate and propylene sulfonic acid terpolymer 30wt%, organic phosphonic acid antiscalant: polyamino polyether group methylene phosphonic acid (solid content is 40%, active ingredient 35% above) 70wt%, reacted at 45°C for 4 hours according to the above-mentioned preparation method to obtain product 1. Adjust the solid content to 35.0wt% with water and call it ZGJ1.

example 2

[0029] Polymer antiscalant: polyacrylic acid 30wt%, organic phosphonic acid antiscalant: aminotrimethylenephosphonic acid 70wt%, reacted at 75°C for 2.5 hours with the above preparation method to obtain product 2. Adjust the solid content to 40.0wt% with water, called ZGJ2.

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PUM

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Abstract

The invention discloses a combinational antisludging agent, comprising a polymer antisludging agent and an organophosphonic acid antisludging agent, wherein the content of single polymer antisludging agent is 5wt%-95wt%, the content of single organophosphonic acid antisludging agent is 5wt%-95wt% and the content of auxiliary agent is not more than 30wt%; the molecular structure of the single polymer antisludging agent or the molecular structure of the single organophosphonic acid antisludging agent contains an amide group or an amino group, and the single agent containing the amide group or the amino group accounts for 10wt%-100wt% of the total weight of the antisludging agent. The antisludging agent of the invention is widely applied in running of a reverse osmosis membrane, a nanofiltration membrane, an ultrafiltration membrane and the like and plays a role in scale inhibition, thereby achieving the purpose of prolonging the service life and the service cycle of a membrane device and protecting the normal running of the membrane device. The invention has advantages of high scale inhibition efficiency, less adding amount and environmental friendliness.

Description

[technical field] [0001] The invention relates to a water treatment agent, in particular to a scale inhibitor. [Background technique] [0002] The inventor retrieved 5 Chinese patents on antiscalants for reverse osmosis membranes, and 10 other documents. The scale inhibitors in the patent literature are all compound scale inhibitors, the composition of which is: organic phosphonic acid compound, lignin, polymaleic acid or anhydride, phosphine carboxylic acid, organic carboxylic acid, amide-containing compound, sulfonic acid-containing Base compounds, ether phosphoric acid, phosphorus-containing polymers, high-efficiency dispersants, fungicides, 1,2,4-tricarboxy, 2-phosphonobutane, crotonic acid-acrolein-hydroxypropyl acrylate copolymer, Polyaspartic acid, an acrylic acid homopolymer and at least one acrylic acid copolymer. Among them, the antiscalant invented by Chinese patent CN200410103525.4 also has the effect of preventing silicon scale; the antiscalant invented by CN2...

Claims

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Application Information

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IPC IPC(8): C02F5/12C02F5/14
Inventor 张英雄邢琳曹宗仑平春霞许树华马友富
Owner CHINA PETROLEUM & CHEM CORP
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