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Water-soluble polymer composition, production method for water-soluble polymer composition, and application for water-soluble polymer composition

A technology of water-soluble polymers and compositions, applied in chemical instruments and methods, sustainable manufacturing/processing, dissolution, etc., can solve problems such as pipe blockage, increase in water intake and discharge, and decrease in cooling efficiency, so as to avoid Foaming, excellent effect, excellent dispersion stability

Active Publication Date: 2018-03-27
TOAGOSEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] It is known that in plants using industrial water containing silica, silica scales precipitate and adhere to heat exchangers, cooling piping, etc., causing problems such as a decrease in cooling efficiency and clogging of piping.
In order to prevent the precipitation of scale, it is effective to adjust the concentration of silica in the cooling water so as not to exceed the solubility, but in the case of using such an operation method, the intake and discharge of water will increase.

Method used

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  • Water-soluble polymer composition, production method for water-soluble polymer composition, and application for water-soluble polymer composition
  • Water-soluble polymer composition, production method for water-soluble polymer composition, and application for water-soluble polymer composition

Examples

Experimental program
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Effect test

Embodiment 1

[0116]

[0117] 650 g of water and 17 g of a 30% sodium hypophosphite aqueous solution were poured into a flask equipped with a stirrer and a capacitor, and the temperature was maintained at 80°C. A liquid obtained by mixing 1,025 g of 80% acrylic acid aqueous solution (hereinafter also referred to as "80%AA") and 180 g of tert-butylacrylamide (hereinafter also referred to as "TBAM") was continuously supplied to the flask for 4 hours each. , and 30% sodium hypophosphite aqueous solution 83g, 30% sodium persulfate aqueous solution 83g, carry out polymerization reaction. After completion of the supply, the reaction liquid was further kept at 80° C. for 1 hour to react. The reaction solution was kept at 80° C., and 48% sodium hydroxide aqueous solution and deionized water were supplied to obtain an aqueous solution (water-soluble polymer composition E1) containing the water-soluble polymer E1 with a solid content concentration of 40% and a pH of 3.0. .

[0118] When the weigh...

Embodiment 2～11 and comparative example 1～4

[0130] Except that the types of raw materials and their usage amounts during polymerization were set as in Table 1 and Table 2, the same operation as in Example 1 was carried out to obtain water-soluble polymer compositions E2 to E11 and C1 with a solid content concentration of 40%. ~C4. The weight average molecular weight of each polymer, the pH of 40% aqueous solution, and evaluation as a scale inhibitor and a dispersant were performed similarly to Example 1, and the results are shown in Table 1 and Table 2.

[0131] [Table 1]

[0132]

[0133] [Table 2]

[0134]

[0135] The details of the compounds shown in Table 1 and Table 2 are as follows.

[0136] 30% NHP: 30% sodium hypophosphite aqueous solution

[0137] 30%Na 2 HPO 3 : 30% disodium hydrogen phosphite pentahydrate aqueous solution

[0138] 48% NaOH: 48% sodium hydroxide aqueous solution

[0139] 80% AA: 80% acrylic acid in water

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Abstract

A water-soluble polymer composition that includes a water-soluble polymer that includes 40-95 parts by mass of a structural unit (A) derived from a carboxyl-group-containing unsaturated monomer, 5-30parts by mass of a structural unit (B) derived from a (meth)acrylamide derivative that has a C1-8 alkyl group, and 0-35 parts by mass of a structural unit (C) derived from another monomer (provided that (A)-(C) total 100 parts by mass) and that is provided with a structural unit (D) derived from one or more compound selected from among phosphorous acid compounds and hypophosphorous acid compounds.The water-soluble polymer composition has a free phosphorus compound content of 2.0 mass% or less.

Description

technical field [0001] The present invention relates to a water-soluble polymer composition, a method for its production, and its utilization. Specifically, it relates to a water-soluble polymer composition useful as a dispersant and a scale inhibitor, and a method for producing the same. Background technique [0002] It is known that in plants using industrial water containing silica, silica scales precipitate and adhere to heat exchangers, cooling piping, etc., causing problems such as a decrease in cooling efficiency and clogging of piping. In order to prevent the deposition of scale, it is effective to adjust the concentration of silica in the cooling water so that it does not exceed the solubility, but in the case of using such an operation method, the intake and discharge of water increase. In recent years, from the standpoint of energy saving and cost reduction, it is required to reduce the amount of water used in the cooling water system, etc. As a result, the opera...

Claims

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Application Information

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IPC IPC(8): C08F220/04B01F17/52C02F5/00C02F5/10C02F5/14C08F2/38C08F220/56C09K23/52
CPCC02F5/00C02F5/10C02F5/14C08F2/38C08F220/04C08F220/56Y02P20/10
Inventor 藤原正裕
Owner TOAGOSEI CO LTD
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