SU1329794A1 - Method of foam suppressing - Google Patents

Abstract

The invention relates to methods for the foaming of water-containing foams and can be used in the chemical industry and metallurgy in the enrichment of ores. The proposed method allows several times to increase the degree of quenching of foams stabilized by cationic surfactants, to reduce the loss of dyed components with foam leaving with drains. The defoaming is carried out by treating with high molecular weight acrylamide-based compounds with copolymers of acrylamide, acryltrile and acrylic acid, acrylamide and acrylic acid. 2 tab. 00 N3 CO with 4

Description

The invention relates to methods for defoaming and can be used in the chemical and metallurgical industries.

The aim of the invention is to increase the degree of defoaming of water-containing foams stabilized by cationic surfactants.

Example 1. When purifying wastewater from cationic compounds by passing air onto the surface of the foam, a copolymer of acrylamide and acrylic acid is served, half of the two-phase foams are listed in Table 1.

Table 1

Copolymer of acrylamide and acrylic acid, obtained by alkaline hydrolysis of polyacrylamide (hydrolyzed polyacrylamide) Copolymer of acrylamide and acrylic acid, obtained by copolymerization of monomers

V

Copolymer of acrylamide, acrylic acid and acrylonitrile obtained by hydrolysis of polyacrylonitrile (PANG)

Copolymer of acrylamide, acrylic acid and acrylonitrile, obtained by copolymerization of monomers

Polyacrylamide

Example 2 On the surface of the thickener concentrate reverse flotation of iron ore using cationic reagent IM-11 serves a copolymer acr g1 amide, acrylonitrile and acrylic acid, obtained by hydrolysis of polyacrylonitrile (PANG) and copolymerization of monomers. Sands thickener come to filtering.

alkaline hydrolysis of polyacrylamide and copolymerization of monomers,

The defoaming is also carried out using as a defoaming agent a copolymer of acrylamide, acrylic acid and acrylonitrile, obtained by hydrolysis of polyacrylonitrile and copolymerization of monomers,

To compare the defoaming effect, defoaming is carried out by the introduction of polyacrylamide. Antifoaming agents are introduced in an amount of 3 g / m.

The results of the experiments defoaming

sixteen

37

57

100

17

39 60

99

18 joint-stock company

62

100

18 AI 63 3915

100 25

thirty

Under the same conditions, a copolymer of acrylamide and acrylic acid, obtained by hydrolysis of polyacrylamide and copolymerization of monomers, and polyacrylamide are used as a foam agent (for comparison). The amount of reagents to be injected is 5 g / l.

Results of triple foamed foam trials obtained during flotation

pyrite, are given in table. 2.

Copolymer of acrylamide, acrylonitrile and acrylic acid, obtained by hydrolysis of polyacrylonitrile (PANG)

Copolymer of acrylamide, acrylonitrile and acrylic acid, obtained by copolymerization of monomers

Copolymer of acrylamide and acrylic acid, obtained by alkaline hydrolysis of polyacrylamide (hydrolyzed polyacrylamide

Copolymer of acrylamide and acrylic acid, obtained with the formula of the invention

The method of defoaming by introducing a high molecular weight acrylamide-based reagent, characterized in that, in order to increase the degree of defoaming of water-containing

Editor I.Rybchenko

Order 3513/9 Circulation 656 Subscription

VNII1Sh State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

table 2

145

147

146

foams stabilized with cationic surfactants, a copolymer of acrylamide and acrylic acid or a copolymer of acrylamide, acrylic acid and acrylonitrile are used as the high molecular weight acrylamide based reagent.

Compiled by G. Lebedeva

Tehred L. Serdyukova Proofreader A. Tsko

Claims (1)

A copolymer of acrylamide, acrylonitrile and acrylic acid obtained by hydrolysis of poly- acrylonitrile (PANG) 48 71 87 97 145 A copolymer of acrylamide, acrylonitrile and acrylic acid, obtained by copolymerization of monomers 48 71 88 98 ¹⁴⁷ A copolymer of acrylamide and acrylic acid obtained by alkaline hydrolysis of polyacrylamide (hydrolyzed polyacrylamide) 51 73 90 one hundred 146 A copolymer of acrylamide and acrylic acid obtained by copolymerization of monomers fifty 72 89 one hundred - 144 Polyacrylamide eleven 21 25 31 35 - Formula invented and I one Pen, stabilized cationic asset surface-active substances The method of defoaming by introducing 35, as a high molecular weight high molecular weight reagent based on acrylamide-based reagent based on acrylamide, the only difference is that they use an acrylamide copolymer and acrylic so that, in order to increase lytic acid or a copolymer of acrylamide anti-foaming agent for water-containing yes, acrylic acid and acrylonitrile.