JP2002540941A - More active dispersing polymer to aid purification, dewatering and retention and drainage - Google Patents

Abstract

  (57) [Summary] The present invention relates to a method for purifying industrial wastewater and furnish. More specifically, it is an improvement that the water-soluble cationic polymer flocculant is added to the wastewater and the furnish so that the concentration thereof is at least 25%. This is a method of purifying industrial wastewater and furnish by dispersing the amount. Industrial wastewater is preferably food processing wastewater, oily wastewater, paper mill wastewater, inorganic pollution wastewater. The furnish may be an aqueous cellulose suspension.

Description

DETAILED DESCRIPTION OF THE INVENTION

FIELD OF THE INVENTION The present invention relates to a method for purifying industrial wastewater and furnish. More specifically, the addition of a water-soluble cationic polymer flocculant to a concentration of at least 25% with respect to the wastewater and the furnish is an improvement, and the water-soluble cationic polymer flocculant is effectively used. This is a method of purifying industrial wastewater and furnish by dispersing the amount. Industrial wastewater is preferably food processing wastewater, oily wastewater, paper mill wastewater, inorganic pollution wastewater. The furnish may be an aqueous cellulose suspension.

BACKGROUND OF THE INVENTION The present invention is directed to the suspension of organic substances having a pale or cellulosic nature, such as may be found in sewage and industrial mill effluent or paper mill effluent. It relates to polymers which are particularly useful as flocculants used.

[0003] Organic suspensions, which are inherently hydrophilic and have a specific gravity very close to the specific gravity of the aqueous solution in which the suspension is suspended, are converted to inorganic hydrophilic materials which are more hydrophilic than the organic suspension. The suspension is compared with standard methods. This inorganic suspension is physically dehydrated, such as filtration, flotation, sedimentation, dehydration, or economically agglomerated with chemical reagents rather than retaining the inorganic suspension during the process steps. Is frequently found to be even more difficult. This tendency is particularly remarkable when the inorganic suspended substance is contained at a high concentration, and the suspended solution usually has a paste-like viscosity and is called sludge or furnish.

[0004] Purification and dehydration of sewage, industrial sludge and similar organic suspensions are facilitated by the use of chemicals, separated into solids / liquids from water, and converted to liquids / liquids. It is well known to add chemicals to induce a coagulation or aggregation state that facilitates the separation process. For this purpose, iron or aluminum lime or salt is used. The most recent synthetic polymer electrolytes include:
Cation copolymers with acrylamide have been found of interest.

[0005] Cation-charged water-soluble or water-dispersible polymers are used in a variety of processes. For example, a process that involves separating solids or insoluble liquids dispersed or suspended in water from water. These types of polymers may be naturally occurring or synthetically produced and are commonly referred to as coagulants or flocculants. These polymers can be used in a variety of processes such as emulsification prevention, sewage dewatering, tap water purification, drainage and retention aids in the pulp and paper manufacturing stage, and flotation aids in decolorization and mining processes.

[0006] Polymers of this type act by neutralizing anionic charged suspensions or suspensions that need to be removed. These suspensions or suspensions may be waste that must be removed from the water or that is preferably removed from the aqueous system. For example, such as coal fuel, which can be solidified or agglomerated and can be sold as a fuel.

[0007] In the water treatment field of solid / liquid separation, the suspension is removed from the water via various treatments. For example, processes such as precipitation, filtration, flotation, filtration, coagulation, coagulation and prevention of emulsification. In addition, after the suspension has been removed from the water, the suspension may need to be dehydrated for further processing and disposal. The liquids processed for solids removal are in the order of billions of suspended or dispersed oil. Alternatively, it may contain a very large amount of suspension or suspended oil. The dehydrated solids may contain from about 0.25% to about 40, 50% by weight solids. Solid / liquid or liquid / liquid separation refers to the removal of solids from liquids or the removal of liquids from liquids.

[0008] While rigorous mechanical means are used for solid / liquid separation, modern means add synthetic or natural cationic polymer compounds to enhance the rate of removal of solids from water. Relies on mechanical separation technology. This mechanical means
Treating the tap water with a cationic coagulant polymer that precipitates suspended inorganic particulates. Thus, the water after the suspended matter is removed can be used for industry and daily life. Other examples of these treatments include the removal of colored soluble materials from waste from paper mills, the use of organic polymer flocculants to agglomerate industrial and domestic waste, and the use of sludge Treatments such as collection and prevention of emulsification are also included.

[0009] Describing the mechanism of the separation treatment, the particles are originally charged with either cations or anions. In addition, these particles are removed by a water-soluble coagulant or flocculant polymer charged to the opposite charge as the particles. This is explained that polyelectrolytes enhance the solid / liquid separation process. In short, a water-soluble or water-dispersible polymer is added to neutralize charged particles and emulsified droplets, and as a result, charged particles and emulsified droplets are separated. The capacity of these polymers will vary depending on the processing situation. The lower the charge, the lower the polymer, the suspended particles will not be electrically neutralized and will repel each other. Conversely, the higher the charge, the more polymer will be wasted, In the worst case, the polymer itself will cause problems.

As an example of a cationic polymer for dehydration, US Pat. No. 3,409,546 uses N- (aminomethyl) -polyacrylamide in combination with other cationic polymers used for treating sewage sludge. It is described. U.S. Pat. No. 3,414,514 describes the use of a copolymer of acrylamide and a quaternary cationic methacrylate ester. Furthermore, Japanese Patent Application No. 61-1060
Publication No. 72 describes another type of cationic polymer and water-soluble copolymer used to dewater wastewater as described in US Pat. No. 3,897,333. Polyethyleneimine, cationic acrylate and methacrylate homopolymers, and other cationic polymers such as polyvinylpyridine are also known.

[0011] Another example of a cationic polymer useful in sewage treatment is US Pat.
No. 645, a cationic copolymer composed of a nonionic monomer such as acrylamide, and a quaternary trimethylammonium ethyl methacrylate methyl sulfate (TMAEM.MSQ) or a quaternary dimethylaminoethyl acrylate methyl sulfate (DMEAEA). .MSQ). Another example of a polymer treatment for sewage dewatering is disclosed in U.S. Pat.
No. 448 describes 1,4-dichloro-2-butene-dimethylamine ionic polychloride and U.S. Pat. No. 5,234,604 describes a block copolymer.

Useful treatments with improved retention and drainage are disclosed in US Pat. Nos. 5,126,014 and 5,26.
No. 6,164.

[0013] These polymers have been discovered to allow coagulation and coagulation of solid sludge and, despite their industrially useful diversity, may limit the use of these materials. There are not various circumstances. While treatment with these known substances is economically feasible for some sludges, it requires expensive and inefficient amounts of reagents to completely treat more sludge. I often do. In addition, mutants are often present in sludge from any one source. For example, mutants contained in materials that feed wastewater, sludge, furnish processing, and / or oxidation state mutants that may be present in the products of these wastewaters are: Any type of particles that must be removed. Further, for some reason, it is not uncommon for some of the known polymer flocculants to be difficult to flocculate. Then, in this invention, it aims at dehydrating the sludge containing industrial wastewater, or providing the excellent artificial method in industrial processing retention.

[0014] SUMMARY OF THE INVENTION The invention relates to method for purifying industrial waste water and the furnish. More specifically, the addition of a water-soluble cationic polymer flocculant to a concentration of at least 25% with respect to the wastewater and the furnish is an improvement, and the water-soluble cationic polymer flocculant is effectively used. This is a method of purifying industrial wastewater and furnish by dispersing the amount. Industrial wastewater is preferably food processing wastewater, oily wastewater, paper mill wastewater, inorganic pollution wastewater. The furnish may be an aqueous cellulose suspension.

DETAILED DESCRIPTION OF THE INVENTION The method of dispersing the polymer used in the present invention is described in US Pat. No. 5,006,59 to Kyoritsu Yuki.
No. 0 and 4,929,655. In addition, Himo (Hy
mo Corporation of Tokyo, Japan) US Patents 5,708,071 and 5,
No. 587,415 also has a detailed description. References were made to these patents for fusing.

The present invention is characterized by a major improvement in the artificial processing of aqueous systems using dispersed polymers. As shown in the examples, currently utilized and published dispersion polymers are lower in concentration than the higher concentrations of these dispersion polymers described herein. The superior polymeric dispersants described herein generally have a far greater effect than would be expected for an artificially produced dispersed polymer. The unexpected superior effect at much lower doses is suggested below. That is unforeseen in the past.

(Monomer) According to the present invention, the polymer dispersant used for treating industrial wastewater or the like includes (I)
Is prepared from a water-soluble monomer mixture comprising at least 5 mol% of a cationic monomer represented by

[0018]

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R ₁ is H or CH ₃ . R ₂ and R ₃ are each an alkyl group having 1 or 2 carbon atoms. A ₁
Represents an oxygen atom or NH. B ₁ represents an alkyl group or hydroxypropyl group having 2 to 4 carbon atoms, and X ₁ represents a counter anion. The water-soluble monomer mixture dissolves in the aqueous solution of the anionic salt. However, polymers made from the monomer mixture do not dissolve in similar aqueous anionic salt solutions. A polymer of the monomer mixture can also be used as a seed polymer. This seed polymer will be described in detail below.

The cationic monomer represented by (I) is preferably a quaternary ammonium salt obtained by reacting benzyl chloride and dimethylaminoethyl acrylate. Specifically, diethylaminoethyl acrylate, dimethylaminohydroxypropyl acrylate, dimethylaminopropyl acrylamide,
Dimethylaminoethyl methacrylate, dimethylaminoethyl methacrylate,
And diethylaminoethyl methacrylate and dimethylaminopropyl methacrylamide.

Among the monomers obtained by copolymerizing the cationic monomer represented by (I), acrylamide, methacrylamide or N-substituted (meth) acrylamide and the cationic monomer represented by the chemical formula 2 are preferable.

[0022]

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R ₄ is H or CH 3. R ₅ and R ₆ are each an alkyl group having 1 or 2 carbon atoms. R ₇ is H or an alkyl group having 1 or 2 carbon atoms. A ₂ is an oxygen atom or NH. B ₂ is an alkyl group having 2 to 4 carbon atoms or a hydroxypropyl group. And X ₂ are counter anions (
counter anion). X ₁ and X ₂ are halogen or very similar to halogen.
Anionic counterions such as SO ₃ OCH ₃ and OC (O) CH ₃
rions).

Among the monomers represented by (II), preferred are ammonium salts such as dimethylaminoethyl acrylate, diethylaminoethyl acrylate, dimethylaminopropyl acrylamide, diethylaminopropyl acrylamide and dimethylhydroxypropyl acrylate, dimethylaminoethyl methacrylate , Diethylaminoethyl methacrylate, dimethylaminopropyl methacrylamide, diethylaminopropyl methacrylamide and dimethylhydroxypropyl methacrylate or N-substituted (meth) acrylamide, and also the methylated and ethylated quaternary salts thereof. Among the cationic monomers represented by the formula (II), particularly preferred are salts and methylated quaternary salts of dialkylaminoethyl acrylate and dialkylaminoethyl methacrylate. The concentration of the above-mentioned monomer in the polymerization reaction mixture is preferably 5 to 30% by weight. (Anion salt) The anion salt bound in the aqueous solution in the present invention is preferably a sulfate, a phosphate, a chloride, or a mixture thereof. More preferably, ammonium sulfate, sodium sulfate, magnesium sulfate, aluminum sulfate, ammonium chloride,
Sodium chloride, ammonium hydrogen phosphate, sodium hydrogen phosphate and potassium hydrogen phosphate. In the present invention, an aqueous solution having a concentration of these salts of 10% or more is used. (Dispersant) The dispersant polymer (also referred to as a stabilizer polymer) is present in a water-soluble anion salt solution obtained by polymerizing the above-mentioned monomers. The dispersant polymer is a water soluble high molecular weight cationic polymer. The dispersant polymer exhibits at least partial solubility in the water-soluble salt solution described above. The dispersant polymer can range from 1 to 1 based on the total weight of the monomers.
It is preferably 0% by weight. Further, the dispersant polymer may be a diallyldialkyl ammonium halide or (I), (II)
) Is contained in an amount of 5 mol% or more. The balance consists of acrylamide or methacrylamide, other N-substituted (meth) acrylamide or diallyldimethylammonium chloride. Although the function of the dispersant does not largely depend on the molecular weight, the molecular weight of the dispersant is preferably in the range of 10,000 to 10,000,000. As an example in the present invention, a polyfunctional alcohol such as glycerin or polyethylene glycol and a chain transfer agent such as sodium formate act together in the polymerization mechanism. The presence of these additives facilitates fine particle precipitation.

(Dispersion Polymer) In carrying out the polymerization reaction, usually, a water-soluble radical-forming agent (water-soluble radical-forming agent) is used.
water-soluble azo compounds such as 2,2'-azobis (2-amidinopropane) hydrochloride and 2,2'-azobis (N, N'-dimethyleneisobutylamine) hydrochloride. Used.

As an example in the present invention, a seed polymer may be added before the polymerization reaction of the monomer is started in order to sufficiently disperse the monomer. The seed polymer is a water-soluble cationic polymer that is insoluble in a water-soluble anion salt. It is also preferred that the polymer is made from the monomer mixture by the steps described herein. Nevertheless, the monomer structure of the seed polymer need not be identical to the monomer structure of the water-soluble cationic polymer formed during the polymerization reaction. However, like the water-soluble polymer formed during the polymerization reaction, the seed polymer should contain at least 5 mol% of the cationic monomer units represented by (I). As an example in the present invention, the seed polymer used in one polymerization reaction is a water-soluble polymer that has been conditioned during a previous reaction using a similar monomer mixture.

One aspect of the present invention is a method of purifying wastewater by dispersing a water-soluble cationic polymer flocculant at least once in an amount sufficient to purify the wastewater. This purification method comprises the steps of: adding an effective amount of the water-soluble coagulant to the wastewater to coagulate a suspension; removing the suspension to obtain purified wastewater. It is. This is because free radical forming conditions (free-radical forming con
dition), said dispersion of said water-soluble cationic polymer flocculant formed by polymerizing vinyl monomers. This water-soluble cationic polymer flocculant is obtained by polymerizing the following substances.

A) contains at least 5 mol% of a cationic monomer selected from the monomers of (I).

[0029]

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R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl. Also, A₁
Is selected from the group consisting of O and NH;₁Is C₂Alkyl, C₃Al
Selected from the group consisting of kill and hydropropoxy groups. Furthermore, X₁
^-Are monomers of the anionic counterion and (II).

[0031]

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R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl. Also, R ₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl
, A₂Is composed of a group consisting of an oxygen atom and NH. B₂Is C
₂Alkyl, C₃Alkyl, C₄Group consisting of alkyl and hydroxypropyl
Selected from the loop. X₂ ⁻Consists of a negative counterion. Negative counter ion in b)
Consists of the compounds shown.

[0033] _b) C _{1 -C} 10 N- alkyl _acrylamide, C _{1 -C} 10 _N, N- dialkyl-allyl _amide, C _{1 -C} 10 N- _{alkylmethacrylamide,} C _{1 -C} 10 _N, N- dialkyl methacrylamide Amide, N-allylacrylamide, N, N-diallylacrylamide, N-allylmethacrylamide, N, N-diallylmethacrylamide, N-allylalkylacrylamide, N, N-diallylalkylacrylamide, N-allylalkylmethacrylamide, N , N-diallylalkyl methacrylamide, acrylamide and methacrylamide at least 5 mol% of a monomer selected from the group consisting of: Further, the stabilizer polymer is a cationic polymer, and is at least partially dissolved in the aqueous solution of the anionic salt. Further, the present invention is improved by adding the water-soluble cationic flocculant polymer to the wastewater in which the polymer dispersion is dissolved in water at a concentration of at least 25% by weight, and dispersing the wastewater.

Another embodiment of the present invention is a wastewater dewatering method for dispersing a water-soluble cationic polymer flocculant at least once and dewatering the wastewater with an effective dewatering amount. This dehydration method is a method of purifying wastewater by adding the water-soluble coagulant to the wastewater in an amount effective for dehydrating the suspension and removing the suspension. The water-soluble coagulant is formed by polymerizing vinyl monomers under a free-radical forming condition in a storage solution containing water, a monomer, a stabilizer polymer, and an aqueous solution of an anion salt. The water-soluble cationic polymer flocculant. This water-soluble cationic polymer flocculant is obtained by polymerizing the following substances.

A) at least 5 mol% of a cationic monomer selected from the monomers of (I).

[0036]

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R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl and C₂Selected from the group consisting of alkyl. Also, A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And hydropropoxy groups. Furthermore, X₁ ^-
Are monomers of the anionic counterion and (II).

[0038]

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R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl. Also, R ₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl
, A₂Is composed of a group consisting of an oxygen atom and NH. B₂Is C
₂Alkyl, C₃Alkyl, C₄Group consisting of alkyl and hydroxypropyl
Selected from the loop. X₂ ⁻Consists of a negative counterion. Negative counter ion in b)
Consists of the compounds shown.

[0040] _b) C _{1 -C} 10 N- alkyl _acrylamide, C _{1 -C} 10 _N, N- dialkyl-allyl _amide, C _{1 -C} 10 N- _{alkylmethacrylamide,} C _{1 -C} 10 _N, N- dialkyl methacrylamide Amide, N-allylacrylamide, N, N-diallylacrylamide, N-allylmethacrylamide, N, N-diallylmethacrylamide, N-allylalkylacrylamide, N, N-diallylalkylacrylamide, N-allylalkylmethacrylamide, N , N-diallylalkyl methacrylamide, acrylamide and methacrylamide at least 5 mol% of a monomer selected from the group consisting of Further, the stabilizer polymer is a cationic polymer, and is at least partially dissolved in the aqueous solution of the anionic salt. Further, the present invention is improved by adding the water-soluble cationic flocculant polymer to the wastewater in which the polymer dispersion is dissolved in water at a concentration of at least 25% by weight, and dispersing the wastewater.

In yet another embodiment of the present invention, an improved method of retaining and draining process water in the manufacture of pulp and paper by dispersing an effective amount, at least once, of a water-soluble cationic polymer flocculant. I will provide a. This involves adding an effective amount to the process water to retain the water-soluble flocculant and improve drainage, in a solvent including water, monomers, stabilizer polymer and a water-soluble anion salt solution. Dispersing the water-soluble cationic polymer flocculant formed from polymerizing vinyl monomers under a free-radical forming condition. The water-soluble cationic polymer flocculant is polymerized from the following.

A) At least 5 mol% of a cationic monomer selected from the monomers of (I).

[0043]

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R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl and C₂Selected from the group consisting of alkyl. Also, A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And hydropropoxy groups. Furthermore, X₁ ^-
Are monomers of the anionic counterion and (II).

[0045]

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R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl. Also, R ₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl
, A₂Is composed of a group consisting of an oxygen atom and NH. B₂Is C
₂Alkyl, C₃Alkyl, C₄Group consisting of alkyl and hydroxypropyl
Selected from the loop. X₂ ⁻Consists of a negative counterion. Negative counter ion in b)
Consists of the compounds shown.

[0047] _b) C _{1 -C} 10 N- alkyl _acrylamide, C _{1 -C} 10 _N, N- dialkyl-allyl _amide, C _{1 -C} 10 N- _{alkylmethacrylamide,} C _{1 -C} 10 _N, N- dialkyl methacrylamide Amide, N-allylacrylamide, N, N-diallylacrylamide, N-allylmethacrylamide, N, N-diallylmethacrylamide, N-allylalkylacrylamide, N, N-diallylalkylacrylamide, N-allylalkylmethacrylamide, N , N-diallylalkyl methacrylamide, acrylamide and methacrylamide at least 5 mol% of a monomer selected from the group consisting of: Further, the stabilizer polymer is a cationic polymer, and is at least partially dissolved in the aqueous solution of the anionic salt. Further, the present invention is improved by adding the water-soluble cationic flocculant polymer to the wastewater in which the polymer dispersion is dissolved in water at a concentration of at least 25% by weight, and dispersing the wastewater.

Among them, a more preferable polymer flocculant is poly (DMEA.MCQ / AcAm).
), Poly (DMEA.BCQ / AcAm) and poly (DMEA.MCQ / DMA)
EA. BCQ / AcAm).

In any embodiment of the present invention, the stabilizer polymer may be polymerized from at least 5 mol% of a cationic monomer selected from the group consisting of the monomers of (I).

[0050]

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R ₁ is selected from the group consisting of H or CH ₃ and R ₂ and R ₃ are selected from the group consisting of C ₁ alkyl and C ₂ alkyl. A ₁ is selected from the group consisting of O or NH, and B ₁ is selected from the group consisting of C ₂ alkyl, C ₃ alkyl and hydropropoxy groups. In addition, X ₁ ^- is a negative counterion, diallyldialkylammonium halogen and (II) monomers.

[0052]

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R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl. Also, R ₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl
, A₂Is composed of a group consisting of an oxygen atom and NH. B₂Is C
₂Alkyl, C₃Alkyl, C₄Group consisting of alkyl and hydroxypropyl
Selected from the loop. X₂ ⁻Consists of a negative counterion. Preferred diallyldia
The alkylammonium halide is diallyldimethylammonium chloride (DA
DMAC).

The wastewater may be selected from the group consisting of industrial wastewater and domestic wastewater.
Further, the industrial wastewater may preferably be selected from the group consisting of food processing wastewater, oily wastewater, paper mill wastewater, and inorganic polluting wastewater. The polymers described herein may be used in combination with poly (DADMAC), poly (epichlorohydrin / dimethylamine) and the inorganic materials therein.

The polymers in the present invention are comparable to polymers from Derypol SACo (Spain). Trade names DR-2570 (15% concentration at the time of purchase), DR-3000 and DR
-4000 (both at 20% concentration when purchased) (Deryool SACo, Spain).

Hereinafter, preferred embodiments and advantages of the present invention will be described. Further, even if it is described in the examples that the present invention is not particularly described in the claims, the present invention is not limited thereto.

Example 1 25% polymer solids, 65 mol% AcAm / 25% DMAEA. BCQ / and 10%
DMAEA. Each dispersant of MCQ is synthesized according to the following procedure. Mix a 1500cc flask with a stirrer, thermocouple, condenser and nitrogen purge tube.
tube), an addition port and a heating tape. In this apparatus, 173.7 g of acrylamide (50% aqueous solution, manufactured by Narco Chemical Co. of Naperville, Ill.) And 158.5 g of dimethylaminoethyl acrylate benzyl chloride quaternary salt (80% aqueous solution, Naruko Chemical Co., Ltd.) were added. 17. Nalco Chemical Co. of Naperville, Ill., 45.5 g of dimethylaminoethyl acrylate methyl chloride quaternary salt (80% aqueous solution, CPS Chemical Company of Old Bridge, NY); 8 g of glycerin, 45.9 g of dimethylaminoethyl acrylate methyl chloride quaternary salt homopolymer (20% aqueous solution, manufactured by Nalco Chemical Co. of Napervi
lle, IL)), a copolymer of 16.7 g of diallyldimethylammonium chloride and dimethylaminoethyl acrylate benzyl chloride quaternary salt (15% aqueous solution, Nalco Chemical Co. of Naperville, IL), 1 0.5 g of a 1.0% aqueous sodium bisulfite solution, sodium diethylenetriamine pentaacetate (DABERSEEN 503 45% aqueous solution, manufactured by Derypol SA (Spain))
. 5 g, 135.0 g ammonium sulfate and 332.3 g deionized water are added. The mixture was stirred at 90 rpm while under a regular nitrogen purge for 35
Heat each time. After reaching 35 degrees, 2% of a 1.0% aqueous solution was
, 2'-azobis (N, N'-dimethyleneisobutylamidine) dihydrochloride (WAKO VA-044 manufactured by Wako Chemicals, Inc., Wako Chemicals of Dallas, TX)
) Was added to the reaction mixture and kept constant at 35 degrees for about 16 hours.
Thereafter, the temperature was raised to 50 ° C., and 1.5 g of a 10% aqueous ammonium persulfate and 1.5 g of a 10% aqueous sodium bisulfite were added. After maintaining the temperature at 50 ° C. for 1 hour, the temperature was lowered to room temperature, and 45.0 g of ammonium sulfate, 10.0 g of sodium thiosulfate, and 10.0 g of acetic acid were added. The final product was a smooth milky white dispersion with a bulk viscosity of 1950 cps. 0.5
% Of active polymer, 74c in 2% aqueous ammonium sulfate
It had a solution viscosity of ps.

Example 2 In order to determine the effectiveness of a solid polymer, a more polymer synthesized in accordance with the process described in Example 1, in purifying wastewater, a jar test was performed. The test was performed using vegetable food processing equipment. 200ml
An untreated wastewater snatch sample was brought from a sewage sump in the facility prior to the containment chamber. An appropriate amount of polymer is added to the sample at pH 7.1, and the solution is stirred vigorously for 5 seconds, followed by gentle stirring for 30 seconds.

The degree of purification of the supernatant liquid is visually evaluated using an index of 1 to 10. 10 indicates that the solid is most treated and in good condition. Flock size is based on visual evaluation. The larger the floc size (the larger the numerical value), the better.

Table 1 shows polymer A (20% active dispersion polymer DR-3000, Derypol SA
2 shows a comparison between Co (Spain) and Polymer B (25% active dispersion polymer, synthesized by the production method of Example 1). 0.125 equivalent of NaN
Since the specific viscosities of both polymers measured in the O ₃ solution decreased equally, it is considered that both polymers have the same molecular weight.

The volumes of the compounds in Table 1 are based on the active basis of a similar polymer.
). Since both polymers have similar compositions and molecular weights, it is generally expected that the performance in Active Basis will be similar, but in this case, the polymer B of the present invention would be more commercially available It became clear that the effect and efficiency were increased as compared with A. Polymer B had better floc size and higher purification than Polymer A. From this, the effect can be obtained with a relatively small capacity when the polymer B is used.

Surprising results were obtained at 25% enrichment. It will be appreciated from the recognition of this wonderful result that as technology improves and much higher concentrations yield greater benefits.

[0063]

[Table 1]

Example 3 A comparison of the polymers synthesized by the production method of Example 1 promoted efficiency in the process performed to dewater sewage on two belt presses of a food processing facility.

The polymer A and the polymer B are combined with a NALmat dosing system.
Nalco Chemical Co., Naperville, Ill.) Was used to pour into the stream of food processing wastewater. The NALMAT dosing system is preferably used to experiment with latex polymers. Once the initial dilution has taken place, the polymer is prepared as a dilute solution. The polymer B diluent must be adjusted to a lower concentration than polymer A due to the much higher Brookfield viscosity of polymer A. The first dilution was adjusted with a NALMAT dosing system also used for the second dilution using a static stirrer to reach lower concentrations. Table 2 shows the first and second dilution strengths.

The turbidity of the filtration removed from the belt filter press was measured by Hack DR-200.
0 (Hach®) spectrophotometer. The less turbidity, the better the performance of the polymer. The cake solids (final wastewater at the end of the belt filter press) were weighed according to the standard procedure. The larger the cake solids, the more effective the treatment at dewatering the solids removed from the wastewater (or sewage). If the polymer performs poorly and significant amounts of solids are squeezed out of the machine, it is possible to artificially increase the cake solids. Therefore, the overall performance of the polymer must be considered. Since the performance of the belt press was largely based on visual evaluation, the following factors were observed: That is, the floc size and shape, the degree of purification of the untreated drainage area, the stability of the wedge section wastewater (squeezing), and the stability of the compression area (including cake viscosity and mat characteristics).

Table 2 shows the results. Improved performance was obtained by using polymer B over commercially utilized polymer A. The cake solid approximates polymer A as a result of treatment with polymer B. However, the overall quality of the treatment with polymer B was very good and the belt was not visible at all (eg a plugged belt). Compared with the polymer A, the purification degree of the filtrate was excellent with a smaller amount than the polymer A. As in Example 2, Polymer A and Polymer B are of similar composition and molecular weight, and therefore expected to have equal performance in active basis. However, it has been found that the effect and efficiency of the polymer B in the present invention are higher than those of the polymer A commercially used.

[0068]

[Table 2]

Example 4 The dewatering ability of wastewater during centrifugation of the polymer synthesized by the production method of Example 1 into wastewater containing oil and grease in a wastewater treatment step was also compared.

[0070] Polymer A and polymer B were poured in-line using a Gear pump. With this type of setting, changes in volume automatically result in changes in dissolution strength as shown in Table 3.

The central clarity (water drained from the centrifuge) and the cake quality were compared qualitatively on a visual basis and the results are summarized in Table 3. Both polymers gave excellent performance, but polymer B was better.

According to Table 3, the lower the value of center clarity, the higher the performance of the polymer. The same amount of polymer A and polymer B have equal center clarity, but polymer B
It is superior to Polymer A because of its high cake quality (drier cake, low viscosity and compactness) over the appropriate dosage range. In Example 4, as in Examples 1 to 3 above, the polymers have the same composition and molecular weight, so the performance in active basis can be expected to be usually equal. Table 3 suggests that polymer B in the present invention is clearly more effective and efficient than polymer A, which is commercially utilized.

[0073]

[Table 3]

Example 5 A polymer synthesized by the production method according to Example 1 was compared with respect to its ability to dewater sludge composed of inorganic contaminated soil around a track. The procedure was performed in a similar manner to Example 2, and the results in Table 4 were obtained.

The polymer volumes in Table 4 also correspond to the active basis of the polymer. Polymer performance includes floc size (largest floc size most preferred), sewage settling velocity (faster is preferred), floc stability to shear (preferably stronger retention during shearing), drainage The speed (the greater the amount of water drained is preferred), was evaluated from these perspectives. Since the polymers have the same composition and molecular weight, it is expected that the performance in the active basis will usually be equal, but the polymer B in the present invention has an effect compared to the commercially utilized polymer A. Table 4 suggests that the efficiency is high.

[0076]

[Table 4]

Example 6 The polymer synthesized by the production method of Example 1 was also compared with respect to the retention and drainage capacity in a recycled paper mill.

[0078] Both Polymer A and Polymer B were poured directly in-line prior to the pressure screen. A simple static stirrer was used to condition the polymer solution. No aging tank was used.

The performance of both polymers is evaluated by measuring the first pass retention (FPR). FRP measures the amount of fiber, fine powder and filler retained in the paper and is calculated by the following formula.

% FRP = [(A−B) / A] × 100 A: Concentration of headbox furnish B: Concentration of white water (eg, filtered water) (g / l) It is preferable that the% FPR be as high as possible. As is clear from Table 5, polymer B
Was used to obtain the same% FPR as obtained when using polymer A.
Similar effects can be obtained with much lower amounts of polymer B. Since the polymers have the same composition and molecular weight, it is expected that the performance in the active basis will usually be equal, but the polymer B in the present invention has an effect compared to the commercially utilized polymer A. Table 5 suggests that the efficiency is high.

[0081]

[Table 5]

Example 7 The polymers synthesized by the production method of Example 1 were compared with respect to their ability to dewater oily wastewater discharged from a smelter. Sewage samples were collected prior to the two belt presses used for dewatering. The polymer was evaluated using a free drainage test performed by the following method. The specified amount of polymer was added to 200 ml of sludge and mixed by inverting 10 times using a graduated cylinder. Pour test load into the pipe on top of the filter cloth and time immediately. The amount of untreated wastewater obtained after 10 seconds is recorded.

Table 6 shows the results of recording the drainage amount after 10 seconds. The greater the amount of drainage, the higher the effect of dehydration. As is evident from Table 6, polymer B is superior to polymer A in active basis. This is because the polymer B has both the more effective (higher drainage capacity) and the more efficient (small amount of application). Since the polymers have the same composition and molecular weight, it is expected that the performance in the active basis will usually be equal, but the polymer B in the present invention has an effect compared to the commercially utilized polymer A. Table 6 suggests that the efficiency is high.

[0084]

[Table 6]

Without departing from the spirit and scope of the invention as set forth in the claims, changes may be made within the scope of rearrangement, operation, and processing of the methods of the invention described herein.

[Procedure amendment]

[Submission date] October 18, 2001 (2001.10.18)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Contents of correction]

[Claims]

Embedded image R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
Negative counterions, and monomers of (II),

Embedded image R ₄ is selected from the group consisting of H and CH ₃ , R ₅ and R ₆ are selected from the group consisting of C ₁ alkyl and C ₂ alkyl, and R ₇ is a hydrogen atom, C ₁ alkyl and C ₂ alkyl. Selected from the group consisting of alkyl,
A ₂ is comprised of the group consisting of an oxygen atom and NH, and B ₂ is selected from the group consisting of C ₂ alkyl, C ₃ alkyl, C ₄ alkyl and hydroxypropyl. X ₂ ^- is a negative counterion below _{b), b) C 1 -C} 10 N- alkyl _acrylamide, C _{1 -C} 10 _N, N- dialkyl-allyl _amide, C _{1 -C} 10 N- alkylmethacrylamide , C ₁ -C ₁₀ N, N-dialkyl methacrylamide, N-allyl acrylamide, N, N-diallyl acrylamide, N-allyl methacrylamide, N, N-diallyl methacrylamide, N-allyl alkyl acrylamide, N, N- At least 5 mol% of a monomer selected from the group consisting of diallylalkylacrylamide, N-allylalkylmethacrylamide, N, N-diallylalkylmethacrylamide, acrylamide and methacrylamide; To the aqueous anion salt solution And it is partially dissolved even without, adding the water-soluble cationic polymer flocculant to said waste water, at least 25 in water
Dispersing at a concentration of% by weight; and a method of treating water.

Embedded image R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, A₁Is O and
Selected from the group consisting of₁Is C₂Alkyl, C₃Alkyl and
And a hydropropoxy group.₁ ^-Is a negative pair
Ion (anionic counterion), diallyldialkylammonium halogen,
And (II) monomers,

Embedded image R ₄ is selected from the group consisting of H and CH ₃ , R ₅ and R ₆ are selected from the group consisting of C ₁ alkyl and C ₂ alkyl, and R ₇ is selected from a hydrogen atom, C ₁ alkyl and C ₂ alkyl is selected from the consisting group, A ₂ is composed of a group consisting of an oxygen atom and NH, _{B 2} is selected from the group consisting of _{C 2} alkyl, _{C 3} alkyl, _{C 4} alkyl and hydroxy propyl, _{X 2} ^- is 3. The method for treating water according to claim 2, wherein the method is a negative counter ion and further comprises these bonds.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/56 C02F 1 / 56F 11/14 11/14 D C08F 2/44 C08F 2/44 C 20 / 34 20/34 20/60 20/60 291/00 291/00 (81) Designated countries EP (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE), OA (BF, BJ, CF, CG, CI, CM, GA, GN, GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SL, SZ, UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AE, AL, AM, AT, AU, AZ, BA, BB, BG, BR BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG , KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, UZ, VN, YU, ZA, ZW (72) Inventor Buerte, Rudolf Germany, Day 63584 Gruendau, Rosenstrasse 15 ( 72) Inventor Joanson, Kathy, C. 27F F-Term (Reference) 4F015 BA06 BA09 BA11 BA19 BA21 BB06 CA04 CA05 CA06 CA20 DB04 DB07 DC07 DC08 EA04 EA07 EA14 EA16 EA32 4D059 AA00 BE08 BE57 BF13 BJ00 DB24 DB01 DB26 JA14 JB26 PA06 PA09 PA10 PA69 PC07 4J026 AA47 AA50 BA29 BA32 FA04 GA06 4J100 AL08P AM21P BA32 BC43 FA21 JA18

Claims (30)

[Claims] 1. An effective amount of a water-soluble cationic polymer to purify wastewater.
A method of purifying wastewater by dispersing a flocculant at least once, wherein the water-soluble flocculant is added to the water in an effective amount to flocculate the suspension;
Removing the suspension; obtaining purified water; and removing the suspension in a solvent comprising water, a monomer and stabilizer polymer, and an aqueous anionic salt solution.
Polymerized beads under free-radical forming conditions
The dispersion of the water-soluble cationic polymer flocculant formed from phenyl monomer,
Wherein said water-soluble cationic polymer flocculant is selected from the group consisting of: a) the monomers of (I).
Polymerized from mole% of cationic monomers, R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
Monomers of the negative counterion (II) and (II) formula R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl;₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl,
A₂Is composed of a group consisting of an oxygen atom and NH;₂Is C₂A
Luquil, C₃Alkyl, C₄Glue consisting of alkyl and hydroxypropyl
Selected from the group. X₂ ⁻Is a negative counter ion shown in b) below, b) C₁-C₁₀N-alkylacrylamide, C₁-C₁₀N, N-dial
Killarylamide, C₁-C₁₀N-alkyl methacrylamide, C₁-C₁₀ N, N-dialkylmethacrylamide, N-allylacrylamide, N, N-di
Allylacrylamide, N-allylmethacrylamide, N, N-diallylmethac
Rilamide, N-allylalkylacrylamide, N, N-diallylalkyl
Acrylamide, N-allylalkylmethacrylamide, N, N-diallylalkyl
Group consisting of methacrylamide, acrylamide and methacrylamide.
At least 5 mol% of a monomer selected from a loop; and wherein the polymer stabilizer is at least partially soluble in the aqueous anionic salt solution.
Adding the water-soluble cationic polymer flocculant to the wastewater and adding at least 25
A method for purifying wastewater, comprising: dispersing at a concentration of% by weight; 2. The stabilizer polymer is composed of the monomers (I).
Polymerized from at least 5 mol% of a cationic monomer selected from the group: R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, A₁Is O and
Selected from the group consisting of₁Is C₂Alkyl, C₃Alkyl and
And a hydropropoxy group.₁ ^-Is a negative pair
Ion (anionic counterion), diallyldialkylammonium halogen,
And (II) monomers, R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl,₇Is hydrogen
Atom, C₁Alkyl and C₂Selected from the group consisting of alkyl, A₂Is
A group consisting of an oxygen atom and NH;₂Is C₂Alkyl
, C₃Alkyl, C₄From the group consisting of alkyl and hydroxypropyl
Selected, X₂ ⁻Is a negative counterion and is characterized by being composed of these bonds.
The method for purifying wastewater according to claim 1, wherein the wastewater is purified. 3. The method according to claim 1, wherein the wastewater is selected from a group consisting of industrial wastewater and domestic wastewater. 4. The method of claim 1, wherein the anion salt is selected from the group consisting of phosphate, sulfate, chloride and a mixture thereof. 5. The method according to claim 1, further comprising a step of adding an appropriate amount of a coagulant to the wastewater at least once. 6. The method according to claim 3, wherein the industrial wastewater is selected from the group consisting of food processing wastewater, oily wastewater, paper mill wastewater, and inorganic polluting wastewater. 7. An effective amount of a water-soluble cationic polymer for dewatering wastewater.
A method of dewatering wastewater by dispersing the flocculant at least once, wherein the water-soluble flocculant is added to the wastewater in an amount effective to dehydrate the suspension;
Removing the suspension; obtaining purified water; and removing the suspension in a solvent comprising water, a monomer and stabilizer polymer, and an aqueous anionic salt solution.
Polymerized beads under free-radical forming conditions
The dispersion of the water-soluble cationic polymer flocculant formed from phenyl monomer,
Wherein said water-soluble cationic polymer flocculant is selected from the group consisting of: a) the monomers of (I).
Polymerized from mole% of cationic monomer, R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
A monomer of a negative counterion (anionic counterion) and (II), R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl;₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl,
A₂Is composed of a group consisting of an oxygen atom and NH;₂Is C₂A
Luquil, C₃Alkyl, C₄Glue consisting of alkyl and hydroxypropyl
Selected from the group. X₂ ⁻Is a negative counter ion shown in b) below, b) C₁-C₁₀N-alkylacrylamide, C₁-C₁₀N, N-dial
Killarylamide, C₁-C₁₀N-alkyl methacrylamide, C₁-C₁₀ N, N-dialkylmethacrylamide, N-allylacrylamide, N, N-di
Allylacrylamide, N-allylmethacrylamide, N, N-diallylmethac
Rilamide, N-allylalkylacrylamide, N, N-diallylalkyl
Acrylamide, N-allylalkylmethacrylamide, N, N-diallylalkyl
Group consisting of methacrylamide, acrylamide and methacrylamide.
At least 5 mol% of a monomer selected from a loop; and wherein the polymer stabilizer is at least partially soluble in the aqueous anionic salt solution.
Adding the water-soluble cationic polymer flocculant to the wastewater and adding at least 25
A method for dewatering wastewater, comprising: dispersing at a concentration of% by weight; 8. The stabilizer polymer is a group consisting of the monomers of (I).
Comprising at least 5 mol% of a cationic monomer selected from: R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
A monomer of the negative counterion (anionic counterion) and (II), R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl;₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl,
A₂Is composed of a group consisting of an oxygen atom and NH;₂Is C₂A
Luquil, C₃Alkyl, C₄Glue consisting of alkyl and hydroxypropyl
Selected from the group. X₂ ⁻Is a negative counterion and consists of these bonds
The method for dewatering wastewater according to claim 7, wherein: 9. The method according to claim 7, wherein the wastewater is selected from the group consisting of industrial wastewater and domestic wastewater. 10. The method of claim 7, wherein the anion salt is selected from the group consisting of phosphate, sulfate, chloride, and mixtures thereof.
The method for dewatering wastewater described in 1. 11. The method according to claim 7, further comprising the step of adding an appropriate amount of a coagulant to the wastewater at least once. 12. The industrial wastewater is selected from the group consisting of food processing wastewater, oily wastewater, paper mill wastewater and inorganic polluting wastewater.
The method for dewatering wastewater described in 1. 13. A process for retaining and draining process water in the manufacture of pulp and paper.
An effective amount of a water-soluble cationic polymer flocculant for at least one portion.
A method for improving process water retention and drainage by dispersing, wherein an effective amount of
Water, monomer and stabilizer polymer, and a solvent containing aqueous anionic salt solution.
Polymerized beads under free-radical forming conditions
The dispersion of the water-soluble cationic polymer flocculant formed from phenyl monomer,
Wherein said water-soluble cationic polymer flocculant is selected from the group consisting of: a) the monomers of (I).
Polymerized from mole% of cationic monomer, R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
A monomer of a negative counterion (anionic counterion), and (II), R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl;₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl,
A₂Is composed of a group consisting of an oxygen atom and NH;₂Is C₂A
Luquil, C₃Alkyl, C₄Glue consisting of alkyl and hydroxypropyl
Selected from the group. X₂ ⁻Is a negative counter ion shown in b) below, b) C₁-C₁₀N-alkylacrylamide, C₁-C₁₀N, N-dial
Killarylamide, C₁-C₁₀N-alkyl methacrylamide, C₁-C₁₀ N, N-dialkylmethacrylamide, N-allylacrylamide, N, N-di
Allylacrylamide, N-allylmethacrylamide, N, N-diallylmethac
Rilamide, N-allylalkylacrylamide, N, N-diallylalkyl
Acrylamide, N-allylalkylmethacrylamide, N, N-diallylalkyl
Group consisting of methacrylamide, acrylamide and methacrylamide.
At least 5 mol% of a monomer selected from a loop; and wherein the polymer stabilizer is at least partially soluble in the aqueous anionic salt solution.
Adding the water-soluble cationic polymer flocculant to the wastewater and adding at least 25
A method for improving process water retention and drainage, comprising: dispersing at a concentration of% by weight; 14. The stabilizer polymer according to claim 1, wherein the glue comprises the monomers of (I).
Polymerized from at least 5 mol% of cationic monomers selected from the group consisting of: R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
A monomer of the negative counterion (anionic counterion), and (II), R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl;₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl,
A₂Is composed of a group consisting of an oxygen atom and NH;₂Is C₂A
Luquil, C₃Alkyl, C₄Glue consisting of alkyl and hydroxypropyl
Selected from the group. X₂ ⁻Is a negative counterion and consists of these bonds
The method for improving process water retention and drainage according to claim 13, wherein: 15. The method of claim 1, wherein the anion salt is selected from the group consisting of phosphate, sulfate, chloride, and mixtures thereof.
3. The method for improving process water retention and drainage according to 3. 16. An effective amount of a water-soluble cationic poly to purify wastewater.
A method for purifying wastewater by dispersing a mer flocculant at least once
Adding the water-soluble coagulant to the water in an amount effective to coagulate the suspension.
Removing the suspension; obtaining purified water; and removing the suspension in a solvent comprising water, a monomer and stabilizer polymer, and an aqueous anionic salt solution.
Polymerized beads under free-radical forming conditions
The dispersion of the water-soluble cationic polymer flocculant formed from phenyl monomer,
Wherein said water-soluble cationic polymer flocculant is selected from the group consisting of: a) the monomers of (I).
Polymerized from mole% of cationic monomer, R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
A monomer of a negative counterion (anionic counterion), and (II) R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl;₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl,
A₂Is composed of a group consisting of an oxygen atom and NH;₂Is C₂A
Luquil, C₃Alkyl, C₄Glue consisting of alkyl and hydroxypropyl
Selected from the group. X₂ ⁻Is a negative counter ion shown in b) below, b) C₁-C₁₀N-alkylacrylamide, C₁-C₁₀N, N-dial
Killarylamide, C₁-C₁₀N-alkyl methacrylamide, C₁-C₁₀ N, N-dialkylmethacrylamide, N-allylacrylamide, N, N-di
Allylacrylamide, N-allylmethacrylamide, N, N-diallylmethac
Rilamide, N-allylalkylacrylamide, N, N-diallylalkyl
Acrylamide, N-allylalkylmethacrylamide, N, N-diallylalkyl
Group consisting of methacrylamide, acrylamide and methacrylamide.
At least 5 mol% of a monomer selected from a loop; and wherein the polymer stabilizer is at least partially soluble in the aqueous anionic salt solution.
Adding the water-soluble cationic polymer flocculant to the wastewater, and adding a 25% by weight concentration in the water.
And a method of purifying wastewater, characterized in that: 17. The stabilizer polymer is composed of the monomers (I).
Polymerized from at least 5 mol% of a cationic monomer selected from the group consisting of
, R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, A₁Is O and
Selected from the group consisting of₁Is C₂Alkyl, C₃Alkyl and
And a hydropropoxy group.₁ ^-Is a negative pair
Ion (anionic counterion), diallyldialkylammonium halogen,
And (II) monomers, R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl,₇Is hydrogen
Atom, C₁Alkyl and C₂Selected from the group consisting of alkyl, A₂Is
A group consisting of an oxygen atom and NH;₂Is C₂Alkyl
, C₃Alkyl, C₄From the group consisting of alkyl and hydroxypropyl
Selected, X₂ ⁻Is a negative counterion and is characterized by being composed of these bonds.
The method for purifying wastewater according to claim 16, wherein the wastewater is purified. 18. The method according to claim 16, wherein the wastewater is selected from the group consisting of industrial wastewater and domestic wastewater. 19. The method of claim 1, wherein the anion salt is selected from the group consisting of phosphate, sulfate, chloride, and mixtures thereof.
7. The method for purifying wastewater according to 6. 20. The method according to claim 16, further comprising the step of adding an appropriate amount of a coagulant to the wastewater at least once. 21. The industrial wastewater is selected from the group consisting of food processing wastewater, oily wastewater, paper mill wastewater and inorganic polluting wastewater.
9. The method for purifying wastewater according to item 8. 22. An effective amount of a water-soluble cationic poly to dewater wastewater.
In a method of dewatering wastewater by dispersing a mer flocculant at least once
Adding the water-soluble coagulant to the wastewater in an amount effective to dehydrate the suspension.
Removing the suspension; obtaining purified water; and removing the suspension in a solvent comprising water, a monomer and stabilizer polymer, and an aqueous anionic salt solution.
Polymerized beads under free-radical forming conditions
The dispersion of the water-soluble cationic polymer flocculant formed from phenyl monomer,
Wherein said water-soluble cationic polymer flocculant is selected from the group consisting of: a) the monomers of (I).
Polymerized from mole% of cationic monomer, R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
Monomers of the negative counterion (anionic counterion) and (II), R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl;₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl,
A₂Is composed of a group consisting of an oxygen atom and NH;₂Is C₂A
Luquil, C₃Alkyl, C₄Glue consisting of alkyl and hydroxypropyl
Selected from the group. X₂ ⁻Is a negative counter ion shown in b) below, b) C₁-C₁₀N-alkylacrylamide, C₁-C₁₀N, N-dial
Killarylamide, C₁-C₁₀N-alkyl methacrylamide, C₁-C₁₀ N, N-dialkylmethacrylamide, N-allylacrylamide, N, N-di
Allylacrylamide, N-allylmethacrylamide, N, N-diallylmethac
Rilamide, N-allylalkylacrylamide, N, N-diallylalkyl
Acrylamide, N-allylalkylmethacrylamide, N, N-diallylalkyl
Group consisting of methacrylamide, acrylamide and methacrylamide.
At least 5 mol% of a monomer selected from a loop; and wherein the polymer stabilizer is at least partially soluble in the aqueous anionic salt solution.
Adding the water-soluble cationic polymer flocculant to the wastewater, and adding a 25% by weight concentration in the water.
And dispersing the waste water. 23. The stabilizer polymer according to claim 1, wherein the polymer is a glue comprising the monomers of (I).
Comprising at least 5 mol% of cationic monomers selected from the group consisting of: R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
Monomers of the negative counterion (II), and (II), R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl;₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl,
A₂Is composed of a group consisting of an oxygen atom and NH;₂Is C₂A
Luquil, C₃Alkyl, C₄Glue consisting of alkyl and hydroxypropyl
Selected from the group. X₂ ⁻Is a negative counterion and consists of these bonds
23. The method of dewatering wastewater according to claim 22, wherein: 24. The method according to claim 22, wherein the wastewater is selected from a group consisting of industrial wastewater and domestic wastewater. 25. The method of claim 2, wherein the anion salt is selected from the group consisting of phosphate, sulfate, chloride, and mixtures thereof.
3. The method for dewatering wastewater according to 2. 26. The method according to claim 22, further comprising the step of adding an appropriate amount of a coagulant to the wastewater at least once. 27. The industrial wastewater is selected from the group consisting of food processing wastewater, oily wastewater, paper mill wastewater and inorganic polluting wastewater.
4. The method for dewatering wastewater according to 4. 28. A process for retaining and draining process water in the manufacture of pulp and paper.
An effective amount of a water-soluble cationic polymer flocculant for at least one portion.
A method for improving process water retention and drainage by dispersing, wherein an effective amount of
Water, monomer and stabilizer polymer, and a solvent containing aqueous anionic salt solution.
Polymerized beads under free-radical forming conditions
The dispersion of the water-soluble cationic polymer flocculant formed from phenyl monomer,
Wherein said water-soluble cationic polymer flocculant is selected from the group consisting of: a) the monomers of (I).
Polymerized from mole percent of a cationic monomer, R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
A monomer of a negative counterion (anionic counterion), and (II) R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl;₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl,
A₂Is composed of a group consisting of an oxygen atom and NH;₂Is C₂A
Luquil, C₃Alkyl, C₄Glue consisting of alkyl and hydroxypropyl
Selected from the group. X₂ ⁻Is a negative counter ion shown in b) below, b) C₁-C₁₀N-alkylacrylamide, C₁-C₁₀N, N-dial
Killarylamide, C₁-C₁₀N-alkyl methacrylamide, C₁-C₁₀ N, N-dialkylmethacrylamide, N-allylacrylamide, N, N-di
Allylacrylamide, N-allylmethacrylamide, N, N-diallylmethac
Rilamide, N-allylalkylacrylamide, N, N-diallylalkyl
Acrylamide, N-allylalkylmethacrylamide, N, N-diallylalkyl
Group consisting of methacrylamide, acrylamide and methacrylamide.
At least 5 mol% of a monomer selected from a loop; and wherein the polymer stabilizer is at least partially soluble in the aqueous anionic salt solution.
Adding the water-soluble cationic polymer flocculant to the wastewater, at a 25% concentration in the water,
Dispersing; and improving the retention and drainage of process water, characterized in that: 29. The stabilizer polymer comprising a glue comprising the monomers of (I).
Polymerized from at least 5 mol% of cationic monomers selected from R₁Is H and CH₃Selected from the group consisting of₂And R₃Is C ₁ Alkyl, and C₂Selected from the group consisting of alkyl, and A₁Is
Selected from the group consisting of O and NH, B₁Is C₂Alkyl, C₃Archi
And X is selected from the group consisting of₁ ^-Is
Monomers of the negative counterion (anionic counterion) and (II); R₄Is H and CH₃Selected from the group consisting of₅And R₆Is C₁ Alkyl and C₂Selected from the group consisting of alkyl;₇ Is a hydrogen atom, C₁Alkyl and C₂Selected from the group consisting of alkyl,
A₂Is composed of a group consisting of an oxygen atom and NH;₂Is C₂A
Luquil, C₃Alkyl, C₄Glue consisting of alkyl and hydroxypropyl
Selected from the group. X₂ ⁻Is a negative counterion and consists of these bonds
The method for improving process water retention and drainage according to claim 28. 30. The method of claim 2, wherein the anion salt is selected from the group consisting of phosphate, sulfate, chloride, and mixtures thereof.
9. The method for improving process water retention and drainage according to item 8.