Combinational antisludging agent and preparation method thereof

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...