CN108864448A - A kind of granulation of cationic polyacrylamide, drying means - Google Patents
A kind of granulation of cationic polyacrylamide, drying means Download PDFInfo
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- CN108864448A CN108864448A CN201810659110.7A CN201810659110A CN108864448A CN 108864448 A CN108864448 A CN 108864448A CN 201810659110 A CN201810659110 A CN 201810659110A CN 108864448 A CN108864448 A CN 108864448A
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- micelle
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/128—Polymer particles coated by inorganic and non-macromolecular organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/24—Homopolymers or copolymers of amides or imides
- C08J2333/26—Homopolymers or copolymers of acrylamide or methacrylamide
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Abstract
The invention discloses a kind of cationic polyacrylamide to be granulated, drying means, includes the following steps that the kation polyacrylamide colloid that polymerization finishes slightly is granulated by (1)；(2) dispersing agent containing anti-crosslinking agent is added；(3) it is carefully granulated, dispersing agent is uniformly mixed with micelle after thin granulation, and micelle is dispersed；(4) micelle is then introduced into fluidized bed, high temperature drying；(5) polyacrylamide powder product is obtained after the particle obtained after drying being ground, sieved.Cationic polyacrylamide provided by the invention is granulated, drying means, utilize the dispersing agent for adding anti-crosslinking agent, so that it is thin be granulated after micelle be able to it is fully dispersed, dispersant-coated is on micelle surface simultaneously, avoid the self-adhesion between micelle, micelle in a fluidized bed can sufficiently fluidization and fast dewatering, utmostly reduce high molecular degradation, the crosslinking of polyacrylamide is also avoided, the adverse effect so as to avoid drying process to product quality.
Description
Technical field
The present invention relates to a kind of drying preparation method thereof of polyacrylamide dry powder more particularly to a kind of cation polypropylene acyls
The granulation of amine power-product, drying means.
Background technique
Cationic polyacrylamide is that current dosage is maximum, most wide one of the water soluble polymer classification of application range,
The numerous areas such as water process, oil recovery, papermaking, weaving have a wide range of applications.It, can since cationic polyacrylamide is positively charged
Play the role of charge neutrality and adsorption bridging in conjunction with particle negatively charged in water, is very suitable for the print high in the content of organic matter
It is used in the processing of the industrial wastewaters such as dye, papermaking, oily waste water, and dirty, sludge dewatering processing as flocculant.
Cationic polyacrylamide is generally respectively colloid, powdery and emulsion-type three types product, wherein powder product
Since relative to colloid products solution rate, fast, use and convenient transportation, preparation process are simple, it is most widely used for being at present
Product type.Cationic monomer and acrylamide are generally first copolymerized by cationic polyacrylamide powder product production process
To cation acrylamide colloid products, granulating from colloid, drying, milling and screening are further obtained into cation polypropylene acyl
Amine power-product.The research of overwhelming majority polyacrylamide process for producing has concentrated on polymerization technique at present.
However, being determined in polymerization technique, i.e., in the fixed situation of colloid products quality, it is granulated and drying process is also very big
Ground affects the quality of polyacrylamide power-product.Polyacrylamide at high temperature, is easy to happen imidization and generates friendship
Connection forms space network, keeps product not soluble in water and lose flocculating property, in addition, high temperature can also cause polyacrylamide
Degradation, causes product relative molecular mass to decline, and application effect accordingly declines.Therefore, how by be granulated, drying process it is excellent
Change, granulation, influence of the drying process to polyacrylamide power-product quality is reduced as far as possible, for cationic polyacrylamide
Production process is also extremely important.
Currently, most of polyacrylamide manufacturing enterprise be all thermal current using vibration fluidized bed, in thermopnore and
Vibration makes micelle fluidization, and is divided to two sections of temperature that micelle is dried.But since polyacrylamide colloid surface is larger viscous
Property, micelle after granulation easily self-adhesion agglomerates, into it is vibration fluidized bed when bulk be difficult to form fluidization, part also adheres to
On drying equipment, lead to micelle uneven heating, product crosslinking or relative molecular mass decline, quality are difficult to ensure.Application number
Method for hydrolysis after a kind of polyacrylamide serialization is disclosed for the patent of CN201410568101.9, it is poly- preparing anion
During acrylamide powder, it is separately added into fatty alcohol and ethylene oxide condensate, polyglycerol ester before hydrolysis and drying process,
The surfactants such as sorbitan fatty acid ester disperse micelle, solve adhesion problem of the micelle in hydrolytic process
With the dispersion of the hydrolytic reagent in micelle.However, solving the dispersion of micelle using surfactant merely, surface is living
Property agent dosage can be very big, due to the price problem of surfactant, the addition of a large amount of surfactant will lead to polypropylene
Amide dry powder preparation cost substantial increase, the economy decline of drying process.
Summary of the invention
In order to solve the above technical problems, the present invention proposes a kind of granulation of cationic polyacrylamide, drying means,
It is thin to be granulated the preceding dispersing agent that anti-crosslinking agent is added, reduce manufacturing cost.
In order to achieve the above object, technical scheme is as follows：A kind of granulation of cationic polyacrylamide, drying
Method includes the following steps：
(1) kation polyacrylamide colloid that polymerization finishes is subjected to thick be granulated and obtains cationic polyacrylamide glue
Grain；
(2) dispersing agent containing anti-crosslinking agent is added in step (1) the cationic polyacrylamide micelle；
(3) the cationic polyacrylamide micelle that dispersing agent is added in step (2) is subjected to thin be granulated and obtains thin micelle, carefully
Dispersing agent is uniformly mixed with micelle after granulation, and micelle is dispersed；
(4) the thin micelle in step (3) is introduced into fluidized bed, in a fluidized bed high temperature drying, after being dried
Cationic polyacrylamide particle；
(5) the cationic polyacrylamide particle in step (4) ground, sieve and takes 20-80 mesh powder
Obtain polyacrylamide powder product.
Preferably, the solid content of the kation polyacrylamide colloid in the step (1) is 15%-50%.
Preferably, the thick prilling in the step (1) uses single screw rod extruding pelletization, it is granulated partial size 20-50mm,
Thin granulation in the step (3) is granulated using rotary knife, and granulation partial size is 1-5mm.
Preferably, dispersing agent is the lotion that aviation kerosine, surfactant and water are mixed to form in the step (2).
Preferably, the surfactant is sorbitanmonolaureate.
Preferably, the dosage of the dispersing agent is the 1.2%-2% of micelle quality.
Preferably, the dispersing agent preparation process is：First sorbitanmonolaureate and aviation kerosine are stirred mixed
Conjunction obtains mixture；Water and mixture are stirred again and dissolve each other to obtain dispersing agent；Wherein, sorbitanmonolaureate and boat
The mass ratio 1 of empty kerosene:20-1:5, the mass ratio of water and mixture is 1:2-1:0.5；
Preferably, the anti-crosslinking agent is sodium formate or sodium hypophosphite, the anti-crosslinking agent accounts for the quality of dispersing agent
Ratio is 0.5%-2%.
Preferably, three sections of the thin drying process of micelle in a fluidized bed point in the step (4), first two sections are sent for high temperature
Wind carries out fluidized drying, and the air-supply of final stage room temperature carries out boiling cooling.
Preferably, thin micelle three sections of temperature of drying process in a fluidized bed are followed successively by 115-125 in the step (4)
DEG C, 90-110 DEG C and room temperature, drying time is followed successively by 10-15min, 10-15min, 3-5min.
Beneficial effects of the present invention：The granulation of cationic polyacrylamide provided by the invention, drying means are carefully being granulated
Before be added to plus anti-crosslinking agent dispersing agent, dispersing agent is the lotion formed by surfactant, aviation kerosine and water, dispersing agent
It is coated on micelle surface, on hydrophilic micelle surface, foring structure is micelle surface-surface activating agent-aviation kerosine
Layer protecting film, it is therefore prevented that micelle bonds again, micelle be able to it is fully dispersed, micelle in a fluidized bed can sufficiently fluidization and
Fast dewatering in shortest time utmostly reduces high molecular degradation.During fluidized drying, aviation kerosine is due to boiling
Point is low, can also volatilize quickly with water, not influence power-product quality.While reaching peptizaiton, dispersing agent cost is also obtained
With sharp fall.In addition, the anti-crosslinking agent in dispersing agent also avoids the crosslinking of polyacrylamide, to ensure that dried
Influence of the journey to product quality.Two sections of temperature are dry in high-temperature drying procedures, and first segment uses high temperature, in colloidal solid moisture content
Dry tack free can quickly be made in the case where relatively high, take moisture out of, in the case where colloid is dried to a certain degree, second segment
Temperature is reduced, product crosslinking or molecular chain rupture are avoided.
Specific embodiment
The present invention will be further described in detail with reference to the specific embodiments.
Embodiment one
(1) dispersing agent containing anti-crosslinking agent sodium formate is prepared first：Sorbitanmonolaureate and aviation kerosine are pressed
Mass ratio 1:9 are stirred to obtain mixture, then by water and mixture in mass ratio 1:1 is stirred and dissolves each other to obtain dispersing agent,
Sodium formate is finally dissolved in into dispersing agent by the 1% of dispersing agent mass ratio；
(2) polymerization being finished, the kation polyacrylamide colloid that solid content is 30% carries out single screw rod and squeezes out thick granulation,
Control is thick to be granulated particle size analysis about 30mm；
(3) thick micelle is introduced into rotary knife pelletizer, while the dispersing agent containing anti-crosslinking agent sodium formate is added, then carried out thin
It is granulated, dispersing agent dosage is the 2% of micelle quality, and the thin control particle size analysis that is granulated is 2-3mm；
(4) micelle is introduced into fluidized bed by blower, is divided to 120 DEG C, 105 DEG C two sections high temperature air-supply is sent to carry out fluidized drying,
Drying time is respectively 15min and 15min, is then blown by 3min room temperature into cooling；
(5) particle obtained after drying ground, sieve and takes 20-80 mesh powder, obtain polyacrylamide powder
Product.
Dispersed relative to surfactant is used alone, the present embodiment reduces dispersing agent cost 60%, reaches simultaneously
Preferably dispersion and drying effect.
Embodiment two
(1) dispersing agent containing anti-crosslinking agent sodium hypophosphite is prepared first, by sorbitanmonolaureate and aviation coal
Oil in mass ratio 1:20 are stirred to obtain mixture, then by water and mixture in mass ratio 1:2 are stirred and dissolve each other point
Sodium hypophosphite is finally dissolved in dispersing agent by the 2% of dispersing agent mass ratio by powder.
(2) polymerization being finished, the kation polyacrylamide colloid that solid content is 50% carries out single screw rod and squeezes out thick granulation,
Control is thick to be granulated particle size analysis about 50mm；
(3) thick micelle is then introduced into rotary knife pelletizer, while the dispersing agent containing anti-crosslinking agent sodium hypophosphite is added, into
Row is thin to be granulated, and dispersing agent dosage is the 1% of micelle quality, and the thin control particle size analysis that is granulated is 4-5mm；
(4) micelle is introduced into fluidized bed by blower, is divided to 105 DEG C, 90 DEG C two sections high temperature air-supply is sent to carry out fluidized drying, does
The dry time is respectively 10min and 10min, is then blown by 5min room temperature into cooling；
(5) particle obtained after drying ground, sieve and takes 20-80 mesh powder, obtain polyacrylamide powder
Product.
Dispersed relative to surfactant is used alone, the present embodiment reduces dispersing agent cost 55%, reaches simultaneously
Preferably dispersion and drying effect.
Embodiment three
(1) dispersing agent for preparing the sodium formate containing anti-crosslinking agent time first, by sorbitanmonolaureate and aviation kerosine
In mass ratio 1:5 are stirred to obtain mixture, then by water and mixture in mass ratio 1:0.5 is stirred to dissolve each other and is dispersed
Sodium formate is finally dissolved in dispersing agent by the 0.5% of dispersing agent mass ratio by agent.
(2) polymerization being finished, the kation polyacrylamide colloid that solid content is 15% carries out single screw rod and squeezes out thick granulation,
Control is thick to be granulated particle size analysis about 20mm；
(3) thick micelle is then introduced into rotary knife pelletizer, while the dispersing agent of the sodium formate containing anti-crosslinking agent time is added, carried out
Thin to be granulated, dispersing agent dosage is the 1% of micelle quality, and the thin control particle size analysis that is granulated is 1-3mm.
(4) micelle is introduced into fluidized bed by blower, is divided to 125 DEG C, 110 DEG C two sections high temperature air-supply is sent to carry out fluidized drying,
Drying time is respectively 15min and 15min, is then blown by 5min room temperature into cooling；
(5) particle obtained after drying ground, sieve and takes 20-80 mesh powder, obtain polyacrylamide powder
Product.
Dispersed relative to surfactant is used alone, the present embodiment reduces dispersing agent cost 75%, reaches simultaneously
Preferably dispersion and drying effect.
Above-described embodiment is only presently preferred embodiments of the present invention, is not intended to limit the scope of the present invention, can when using
Simplified or equivalence changes are carried out to above-described embodiment according to actual needs.
Claims (10)
1. a kind of granulation of cationic polyacrylamide, drying means, which is characterized in that include the following steps：
(1) kation polyacrylamide colloid that polymerization finishes is subjected to thick be granulated and obtains cationic polyacrylamide micelle；
(2) dispersing agent containing anti-crosslinking agent is added in step (1) the cationic polyacrylamide micelle；
(3) the cationic polyacrylamide micelle that dispersing agent is added in step (2) is subjected to thin be granulated and obtains thin micelle；
(4) the thin micelle in step (3) is introduced into fluidized bed, in a fluidized bed high temperature drying, after dry it is positive from
Sub- polyacrylamide particle；
(5) the cationic polyacrylamide particle in step (4) ground, sieve 20-80 mesh powder is taken to obtain
Polyacrylamide powder product.
2. the granulation of cationic polyacrylamide according to claim 1, drying means, which is characterized in that the step
(1) solid content of the kation polyacrylamide colloid in is 15%-50%.
3. the granulation of cationic polyacrylamide according to claim 1 or 2, drying means, which is characterized in that the step
Suddenly the thick prilling in (1) uses single screw rod extruding pelletization, is granulated partial size 20-50mm, and the thin granulation in the step (3) is adopted
It is granulated with rotary knife, granulation partial size is 1-5mm.
4. the granulation of cationic polyacrylamide according to claim 1, drying means, which is characterized in that the step
(2) dispersing agent is the lotion that aviation kerosine, surfactant and water are mixed to form in.
5. the granulation of cationic polyacrylamide according to claim 4, drying means, which is characterized in that the surface
Activating agent is sorbitanmonolaureate.
6. the granulation of cationic polyacrylamide according to claim 5, drying means, which is characterized in that the dispersion
The dosage of agent is the 1.2%-2% of micelle quality.
7. the granulation of cationic polyacrylamide according to claim 5, drying means, which is characterized in that the dispersion
Agent preparation process is：
First it is stirred sorbitanmonolaureate and aviation kerosine to obtain mixture；
Water and mixture are stirred again and dissolve each other to obtain dispersing agent；
Wherein, the mass ratio 1 of sorbitanmonolaureate and aviation kerosine:20-1:5, the mass ratio of water and mixture
It is 1:2-1:0.5.
8. the granulation of cationic polyacrylamide according to claim 1, drying means, which is characterized in that the anti-friendship
Joining agent is sodium formate or sodium hypophosphite, and the mass ratio that the anti-crosslinking agent accounts for dispersing agent is 0.5%-2%.
9. the granulation of cationic polyacrylamide according to claim 1, drying means, which is characterized in that the step
(4) three sections of the thin drying process of micelle in a fluidized bed point in, first two sections carry out fluidized drying for high temperature air-supply, and final stage is normal
Temperature air-supply carries out boiling cooling.
10. the granulation of cationic polyacrylamide according to claim 9, drying means, which is characterized in that the step
(4) the three sections of temperature of drying process of thin micelle in a fluidized bed are followed successively by 115-125 DEG C, 90-110 DEG C and room temperature in, when dry
Between be followed successively by 10-15min, 10-15min, 3-5min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810659110.7A CN108864448A (en) | 2018-06-25 | 2018-06-25 | A kind of granulation of cationic polyacrylamide, drying means |
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| CN201810659110.7A CN108864448A (en) | 2018-06-25 | 2018-06-25 | A kind of granulation of cationic polyacrylamide, drying means |
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| CN108864448A true CN108864448A (en) | 2018-11-23 |
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| CN201810659110.7A Pending CN108864448A (en) | 2018-06-25 | 2018-06-25 | A kind of granulation of cationic polyacrylamide, drying means |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104448353A (en) * | 2013-09-16 | 2015-03-25 | 中国石油化工股份有限公司 | Dispersant composition and application thereof |
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- 2018-06-25 CN CN201810659110.7A patent/CN108864448A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104448353A (en) * | 2013-09-16 | 2015-03-25 | 中国石油化工股份有限公司 | Dispersant composition and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 赵普春: "《胶体聚合物造粒用分散剂研究》", 《西南石油学院学报》 * |
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Application publication date: 20181123 |