A reverse osmosis antiscalant

A reverse osmosis and antiscalant technology, applied in the field of water treatment, can solve the problems of poor antiscaling effect and achieve high antiscaling rate, strong antiscaling and dispersion effect, and high tolerance

Active Publication Date: 2021-03-19
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] By providing a reverse osmosis scale inhibitor, the present invention solves the technical problem that the existing reverse osmosis scale inhibitor has poor scale inhibition effect on water quality with high hardness and high sulfate concentration

Method used

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  • A reverse osmosis antiscalant
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Examples

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preparation example Construction

[0029] see figure 1 , in an embodiment of the present invention, the preparation method of the crotonic acid-acrylamide-hydroxypropyl acrylate copolymer comprises the following steps:

[0030] S101: add a certain amount of water into the reaction kettle, heat it to 60-90° C., add an appropriate amount of isopropanol to obtain a reaction system; The weight ratio of isopropanol and water is 1:6-8;

[0031] Wherein, water is the solvent of the polymerization reaction, and isopropanol is used to adjust the molecular weight of the polymer.

[0032] S102: drop the mixed monomer and the initiator into the reaction system, and control the temperature of the dropwise process system at 70-95 °C; wherein, the mixed monomer is composed of crotonic acid, acrylamide and hydroxypropyl acrylate, Its weight ratio is 10-30:5-10:10-30;

[0033] S103: After the dropwise addition of the mixed monomer and the initiator, the temperature of the system is raised to 95-120° C., and the reaction is m...

Embodiment 1

[0040] S1: Preparation of crotonic acid-acrylamide-hydroxypropyl acrylate copolymer:

[0041] 105g of water was added to the reactor, heated to 60°C, and 17.5g of isopropanol was added to obtain a reaction system;

[0042] The mixed monomer and ammonium persulfate aqueous solution were added dropwise to the reaction system, and the temperature of the system during the dropwise addition was controlled at 70°C; wherein, the mixed monomer was composed of 10 g of crotonic acid, 5 g of acrylamide and 10 g of hydroxypropyl acrylate , the dosage of ammonium persulfate is 0.125g;

[0043] After the dropwise addition of the mixed monomer and the initiator, the temperature of the system was raised to 95° C., and the reaction was maintained for 8 hours to obtain the crotonic acid-acrylamide-hydroxypropyl acrylate copolymer.

[0044] S2: Weigh 35g polyaminopolyether-based methylenephosphonic acid (PAPEMP), 40g crotonic acid-acrylamide-hydroxypropyl acrylate copolymer, 5g ethylenediaminet...

Embodiment 2

[0049] S1: Preparation of crotonic acid-acrylamide-hydroxypropyl acrylate copolymer:

[0050] 150g of water was added to the reactor, heated to 70°C, and 25g of isopropanol was added to obtain a reaction system;

[0051] The mixed monomer and ammonium persulfate aqueous solution were added dropwise to the reaction system, and the temperature of the system during the dropwise addition was controlled at 80°C; wherein, the mixed monomer was composed of 30 g of crotonic acid, 5 g of acrylamide and 15 g of hydroxypropyl acrylate , the dosage of ammonium persulfate is 0.5g;

[0052] After the dropwise addition of the mixed monomer and the initiator, the temperature of the system was raised to 100° C., and the reaction was maintained for 6 hours to obtain the crotonic acid-acrylamide-hydroxypropyl acrylate copolymer.

[0053] S2: Weigh 45g of polyaminopolyether methylenephosphonic acid (PAPEMP), 35g of crotonic acid-acrylamide-hydroxypropyl acrylate copolymer, 5g of ethylenediaminet...

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Abstract

The invention discloses a reverse-osmosis scale inhibitor and belongs to the technical field of water treatment. Based on 100 parts by weight of the reverse-osmosis scale inhibitor, the reverse-osmosis scale inhibitor comprises 30 to 50 parts by weight of polyamino polyether methylene phosphonate, 30 to 60 parts by weight of a butenoic acid-acrylamide-hydroxypropyl acrylate copolymer, 3 to 5 parts by weight of ethylenediaminetetra(methylenephosphonic acid) and 10 to 20 parts by weight of water. According to the reverse-osmosis scale inhibitor disclosed by the invention, all components in a formula have a synergistic effect and the technical problem of an existing reverse-osmosis scale inhibitor that the scale inhibition effect on water quality with high rigidity and high sulfate concentration is poor is solved; and the reverse-osmosis scale inhibitor is suitable for a reverse-osmosis desalting system for the water quality with the high rigidity and high sulfate concentration and is used for preventing a condition that salt in the water is enriched to form scale and a reverse-osmosis membrane is polluted and blocked.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a reverse osmosis scale inhibitor. Background technique [0002] Reverse osmosis technology is to use reverse osmosis membrane to separate water and water ions, so as to achieve the purpose of purifying water. In the process of water separation, due to the continuous permeation of the reverse osmosis membrane, the salt in the water is enriched on the inlet side of the membrane to form concentrated water. Blocking the reverse osmosis membrane. Therefore, in order to prevent the reverse osmosis membrane from being fouled and blocked by the salt-rich dirt in the water, measures are generally taken to protect the reverse osmosis membrane by adding an appropriate amount of scale inhibitor (or reverse osmosis membrane protective agent) at the inlet of the reverse osmosis system. [0003] The maintenance of the reverse osmosis membrane plays an indispensable role in the normal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D65/08B01D61/02C02F1/44
CPCB01D61/025B01D65/08B01D2321/16C02F1/441
Inventor 刘旭明张跃洋赵路遥董舒宇
Owner SHOUGANG CORPORATION
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