CN113262748A - Polymerization kettle for producing polyacrylamide - Google Patents
Polymerization kettle for producing polyacrylamide Download PDFInfo
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- CN113262748A CN113262748A CN202110700157.5A CN202110700157A CN113262748A CN 113262748 A CN113262748 A CN 113262748A CN 202110700157 A CN202110700157 A CN 202110700157A CN 113262748 A CN113262748 A CN 113262748A
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- magnetic control
- reaction kettle
- concentration
- polymerization reaction
- slide block
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/087—Cleaning containers, e.g. tanks by methods involving the use of tools, e.g. brushes, scrapers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F120/00—Homopolymers 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 a salt, anhydride, ester, amide, imide or nitrile thereof
- C08F120/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F120/52—Amides or imides
- C08F120/54—Amides, e.g. N,N-dimethylacrylamide or N-isopropylacrylamide
- C08F120/56—Acrylamide; Methacrylamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/01—Processes of polymerisation characterised by special features of the polymerisation apparatus used
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
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- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention relates to a polymerization reaction kettle for producing polyacrylamide, which comprises a reaction kettle body, wherein an elastic friction ring is arranged inside the reaction kettle body, and the elastic friction ring is slidably arranged on a first slide bar and a second slide bar through a first magnetic control slide block and a second magnetic control slide block; the second magnetic control slide block and the first magnetic control slide block are provided with an external magnetic control device in a matching way, and the external magnetic control device is arranged outside the reaction kettle body.
Description
Technical Field
The invention relates to the technical field of polymerization reaction kettles for producing polyacrylamide, in particular to a polymerization reaction kettle for producing polyacrylamide.
Background
The polymerization kettle is a reaction vessel for producing artificial latex by high molecular polymerization reaction, and the reaction monomers are polymerized in the polymerization kettle to form long chains, wherein the (carboxyl) styrene-butadiene latex has certain viscosity and is easy to stick on the inner wall of the polymerization kettle, namely, the phenomenon of wall hanging is generated; if the glue is not removed in time, adverse effect can be generated on the reaction on the inner wall of the polymerization kettle, adverse effect can be generated on the reaction of the next reaction kettle, the consistency of products is difficult to control, and the unsmooth inner wall of the polymerization kettle can cause the difficulty in colloid blanking.
The traditional treatment mode is that a Teflon material is sprayed on the inner surface of a polymerization kettle, but in the process of repeated use, the sprayed material on the inner surface can fall off, and the spraying must be carried out again at intervals, so that the repetition and the troublesome operation are caused, the use cost is greatly increased, and the product quality can be influenced by the falling off of the sprayed material on the inner surface when the polymerization kettle is used; the oil spraying mode is adopted, the cleaning effect is not ideal, the wall hanging removal rate is low, and more damaged raw materials are obtained; the wall is hung on the wall for a long time to be condensed, so that the inner wall is rotten and damaged; therefore, a polymerization reaction kettle for producing polyacrylamide is needed.
Disclosure of Invention
The invention aims to provide a polymerization reaction kettle for producing polyacrylamide, which has the characteristics of simple structure, thorough removal, convenient use and material saving.
In order to solve the problems, the invention provides a polymerization reaction kettle for producing polyacrylamide, which comprises a reaction kettle body, wherein an elastic friction ring is arranged inside the reaction kettle body, and the elastic friction ring is slidably arranged on a first slide bar and a second slide bar through a first magnetic control slide block and a second magnetic control slide block; the second magnetic control slide block and the first magnetic control slide block are provided with an external magnetic control device in a matching way, and the external magnetic control device is arranged outside the reaction kettle body.
The polymerization reaction kettle for producing polyacrylamide provided by the invention also has the following technical characteristics:
furthermore, the elastic friction ring is annular, and the external magnetic control device is annular.
Furthermore, at least one second magnetic control slide block and at least one first magnetic control slide block are arranged.
Furthermore, the second magnetic control slider is arranged on the second slide bar, and the first magnetic control slider is arranged on the first slide bar.
Further, the process conditions of the polymerization reaction are as follows: the material concentration is 23-25%, the ionic degree is 28%, the initiation temperature is 0-2 ℃, the concentration of the redox agent is 0.003 ‰, the concentration of the azodiisobutyronitrile is 0.15 ‰, the urea concentration is 2.5-3.5%, the pH value is 7.5, the concentration of the complexing agent is 0.012 ‰, and the concentration of the chain transfer agent is 0.06 ‰.
Further, the polymerization initiator in the polymerization reaction kettle is composed of an S-20 emulsifier and light oil in proportion.
Further, the ratio of the S-20 emulsifier to the light oil is 2: 8.
the invention creates a polymerization reaction kettle for producing polyacrylamide by the reaction kettle body, the elastic friction ring, the first slide bar, the external magnetic control device, the second slide bar, the second magnetic control slide block and the first magnetic control slide block, and has the characteristics of simple structure, thorough cleaning, convenient use and material saving.
The invention has the following beneficial effects: the following points are provided by combining specific technical means:
1. according to the invention, the elastic friction ring is arranged in the reaction kettle body, the second magnetic control slide block and the first magnetic control slide block are utilized to enable the elastic friction ring to slide up and down along the first slide rod and the second slide rod, and the second magnetic control slide block and the first magnetic control slide block are influenced by the external magnetic control device, so that the elastic friction ring can perform friction sliding on the inner wall of the reaction kettle body, the effect of removing wall hanging is achieved, the structure is simple, and the effect is good.
2. The invention removes the rubber blocks of the polymerization reaction by friction, saves resources, has less waste and pollution and good removal effect compared with the traditional mode, and does not influence the production process of the reaction kettle.
3. The technological conditions of the polymerization reaction created by the invention are as follows: the material concentration is 23-25%, the ionic degree is 28%, the initiation temperature is 0-2 ℃, the concentration of the redox agent is 0.003 per thousand, the concentration of the azodiisobutyronitrile is 0.15 per thousand, the concentration of the urea is 2.5-3.5%, the pH value is 7.5, the concentration of the complexing agent is 0.012 per thousand, and the concentration of the chain transfer agent is 0.06 per thousand.
4. The invention creates a polymerization initiator in a polymerization reaction kettle, which is composed of an S-20 emulsifier and light oil in a ratio of 2: 8, the wall hanging phenomenon is greatly reduced, and the process has good process performance.
Drawings
FIG. 1 is a front view of a polymerization reactor for producing polyacrylamide according to an embodiment of the present invention;
FIG. 2 is a schematic view showing the internal state of an elastic friction ring of a polymerization reactor for producing polyacrylamide according to an embodiment of the present invention;
FIG. 3 is a plan view showing the internal state of the elastic friction ring of a polymerization reactor for producing polyacrylamide according to an embodiment of the present invention;
in the figure: 1. the reaction kettle comprises a reaction kettle body 2, an elastic friction ring 3, a first slide bar 4, an external magnetic control device 5, a second slide bar 6, a second magnetic control slide block 7 and a first magnetic control slide block.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The polymerization reaction kettle for producing polyacrylamide shown in fig. 1-3 comprises a reaction kettle body 1, wherein an elastic friction ring 2 is arranged inside the reaction kettle body 1, and the elastic friction ring 2 is slidably arranged on a first slide bar 3 and a second slide bar 5 through a first magnetic control slide block 7 and a second magnetic control slide block 6; the second magnetic control slider 6 and the first magnetic control slider 7 are provided with an outer magnetic control device 4 in a matching way, and the outer magnetic control device 4 is arranged outside the reaction kettle body 1.
When the invention is implemented, the implementation key points are as follows:
1. according to the invention, the elastic friction ring 2 is arranged in the reaction kettle body 1, the second magnetic control slide block 6 and the first magnetic control slide block 7 are utilized to enable the elastic friction ring 2 to slide up and down along the first slide bar 3 and the second slide bar 5, and the second magnetic control slide block 6 and the first magnetic control slide block 7 are influenced by the outer magnetic control device 4, so that the elastic friction ring 2 can perform friction sliding on the inner wall of the reaction kettle body 1, and the effect of removing wall hanging is achieved.
2. The invention removes the rubber blocks of the polymerization reaction by friction, saves resources, has less waste and pollution and good removal effect compared with the traditional mode, and does not influence the production process of the reaction kettle.
3. The technological conditions of the polymerization reaction created by the invention are as follows: the material concentration is 23-25%, the ionic degree is 28%, the initiation temperature is 0-2 ℃, the concentration of the redox agent is 0.003 per thousand, the concentration of the azodiisobutyronitrile is 0.15 per thousand, the concentration of the urea is 2.5-3.5%, the pH value is 7.5, the concentration of the complexing agent is 0.012 per thousand, and the concentration of the chain transfer agent is 0.06 per thousand.
4. The invention creates a polymerization initiator in a polymerization reaction kettle, which is composed of an S-20 emulsifier and light oil in a ratio of 2: 8, the wall hanging phenomenon is greatly reduced, and the process has good process performance.
In an embodiment of the application, the elastic friction ring 2 is annular, and the external magnetic control device 4 is annular, so that the structure matching performance is good, the cost is low, and the effect is good.
In an embodiment of the application, at least one of the second magnetic control slider 6 and the first magnetic control slider 7 is arranged, so that the effect is good, the structure is simple, and the implementation is convenient.
In one embodiment of the application, the second magnetic control slider 6 is arranged on the second sliding rod 5, and the first magnetic control slider 7 is arranged on the first sliding rod 3, so that the structure is simple and practical, and the implementation is convenient.
In one embodiment herein, the process conditions for the polymerization reaction are: the material concentration is 23-25%, the ionic degree is 28%, the initiation temperature is 0-2 ℃, the concentration of the redox agent is 0.003 ‰, the concentration of the azodiisobutyronitrile is 0.15 ‰, the urea concentration is 2.5-3.5%, the pH value is 7.5, the concentration of the complexing agent is 0.012 ‰, and the concentration of the chain transfer agent is 0.06 ‰;
according to the traditional and existing production conditions, the material concentration is 23-25%, and the ionic degree is 28%;
the experimental data for initiation temperature are as follows:
| initiation temperature deg.C | -4 | -2 | 0 | 2 | 4 | 6 | 8 | 10 | 12 | 14 |
| Molecular weight (ten thousand) | Is free of | 1713 | 2123 | 2106 | 1704 | 1645 | 1572 | 1511 | 1352 | 1198 |
In connection with initiationThe redox reagent concentration test data are as follows: wherein the number is 3 x 10-6Benchmark evaluation of reaction rate and molecular weight effects, wherein-is decreased, + is increased; the molecular weight influence refers to that the polymer proportion of 2000-2100 ten thousand is used as an evaluation index, and the reaction rate is the polymerization reaction speed;
| redox concentration (. about.10)-6） | 1.5 | 3 | 6 | 9 |
| Rate of reaction | - | 0 | + | ++ |
| Influence of molecular weight | + | 0 | - | -- |
The test data for urea content are as follows:
| urea content% | Molecular weight 104 | Insoluble substance (3 mm > d ≥ 1 mm) | Whether it is qualified or not |
| 1 | 2068 | 10% | Fail to be qualified |
| 1.5 | 2114 | 9% | Fail to be qualified |
| 2 | 2166 | 7% | Qualified |
| 2.5 | 2079 | 5% | Qualified |
| 3 | 2036 | 5% | Qualified |
| 3.5 | 2015 | 8% | Qualified |
| 4 | 1998 | 8% | Fail to be qualified |
| 4.5 | 1896 | 7% | Fail to be qualified |
| 5 | 1800 | 7% | Fail to be qualified |
The concentration of the reaction system materials is certain, the optimal urea addition amount can be obtained by adjusting the urea content under the condition that the initiator content is determined, the production cost can be reduced, the polymer solubility is improved, the concentration of the molecular weight is not reduced to be 2-3%, the urea content exceeds 4%, the product solubility does not change too much, but the molecular weight is gradually reduced, and the product is easy to agglomerate along with the increase of the urea content.
The azodiisobutyronitrile is selected as the initiator according to the initiation temperature required by the polymerization reaction, and the azodiisobutyronitrile is insensitive to solvent and impurities, and the water solubility of the azodiisobutyronitrile can be increased by introducing polar groups; because the concentration of the azodiisobutyronitrile is not obviously changed, the reaction requirement can be met by selecting the conventional concentration, and the azodiisobutyronitrile is 0.15 per mill.
The data for the pH test are as follows:
when the pH value is higher, the polymerization rate is accelerated, and the molecular weight is reduced; too low a pH value, intermolecular and intramolecular imidization reactions occur during polymerization to form branched and crosslinked products, and the solubility is reduced;
molecular weight and solubility were evaluated on a pH 7.5 basis, where-is decrease, + is increase
| |
6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 |
| Molecular weight | +++ | ++ | + | 0 | - | -- | --- |
| Solubility in water | --- | -- | - | 0 | + | ++ | +++ |
The experimental data for the complexing agent concentration are as follows:
evaluating the reaction rate and the influence of molecular weight by taking the concentration of the complexing agent as 0.012 per thousand as a reference, wherein-is reduction and + is increase; the molecular weight influence refers to that the polymer proportion of 2000-2100 ten thousand is used as an evaluation index, and the reaction rate is the polymerization reaction speed;
| concentration of complexing agent (. about.10)-6） | 10 | 12 | 14 |
| Rate of reaction | - | 0 | + |
| Influence of molecular weight | + | 0 | - |
The test data for chain transfer agent concentration are as follows:
evaluating the reaction rate and the influence of molecular weight by taking the concentration of the chain transfer agent as 0.06 per thousand as a reference, wherein-is reduction and + is increase; the molecular weight influence refers to that the polymer proportion of 2000-2100 ten thousand is used as an evaluation index, and the reaction rate is the polymerization reaction speed;
| chain transfer agent concentration (. about.10)-6） | 4 | 6 | 8 |
| Rate of reaction | - | 0 | + |
| Influence of molecular weight | + | 0 | - |
Therefore, the process reaction efficiency under the condition is high, and the process conditions of the polymerization reaction are as follows: the material concentration is 23-25%, the ionic degree is 28%, the initiation temperature is 0-2 ℃, the concentration of the redox agent is 0.003 thousandth, the concentration of the azodiisobutyronitrile is 0.15 thousandth, the concentration of the urea is 2.5-3.5%, the pH value is 7.5, the concentration of the complexing agent is 0.012 thousandth, the concentration of the chain transfer agent is 0.06 thousandth, the reaction rate is high, the molecular weight meets the requirements, and the yield is good.
In one embodiment of the application, the polymerization initiator in the polymerization reaction kettle is composed of an S-20 emulsifier and light oil in proportion; the ratio of the S-20 emulsifier to the light oil is 2: 8; the original traditional mode, the improved mechanical mode and the new formula are adopted, and the probability of exceeding the standard of the residue of the spot check wall hanging is compared, the frequency of cleaning the wall hanging, the loss of cleaning materials and the recovery rate of the materials are compared;
| in a conventional manner | New formula | Mechanical cleaning | Mechanical cleaning + new formula | |
| Percent of pass | 90% | 98% | 85% | 100% |
| Frequency of cleaning the wall | 120 | 90 | 90 | 30 |
| Cleaning material | 60L | 45L | 0 | 15L |
| Recovery ratio | 90% | 85% | Without recycling | 85% |
The data are analyzed and summarized according to months, and it can be seen that the material loss and waste solved by the new formula need to be frequently cleaned to ensure the qualification rate of the sampling inspection, the wall cleaning times are reduced, repeated wall flushing is mainly avoided, and the wall-hanging glue blocks are completely dissolved, so that repeated wall flushing is not needed; the removal rate of mechanical removal is not high, but no material is lost, so that the material using amount is greatly reduced, and the material recovery is not needed; in order to improve the qualification rate, the improved formula is used, the new formula is used for dissolving under the condition of reducing the using amount, mechanical removal is added, the production continuity can be ensured by the original cleaning and adjustment for one time per day for each shift, and the influence of the wall-hanging glue block on the product quality is prevented.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a polymerization cauldron is used in polyacrylamide production, includes reation kettle body (1), its characterized in that: an elastic friction ring (2) is arranged in the reaction kettle body (1), and the elastic friction ring (2) is slidably arranged on the first sliding rod (3) and the second sliding rod (5) through a first magnetic control sliding block (7) and a second magnetic control sliding block (6); the second magnetic control slider (6) and the first magnetic control slider (7) are provided with an outer magnetic control device (4) in a matched manner, and the outer magnetic control device (4) is arranged outside the reaction kettle body (1).
2. The polymerization reaction kettle for producing polyacrylamide as recited in claim 1, wherein: the elastic friction ring (2) is annular, and the external magnetic control device (4) is annular.
3. The polymerization reaction kettle for producing polyacrylamide as recited in claim 1, wherein: at least one second magnetic control slide block (6) and at least one first magnetic control slide block (7) are arranged respectively.
4. The polymerization reaction kettle for producing polyacrylamide as recited in claim 1, wherein: the second magnetic control slide block (6) is arranged on the second slide bar (5), and the first magnetic control slide block (7) is arranged on the first slide bar (3).
5. The polymerization reaction kettle for producing polyacrylamide as recited in claim 1, wherein: wherein the process conditions of the polymerization reaction are as follows: the material concentration is 23-25%, the ionic degree is 28%, the initiation temperature is 0-2 ℃, the concentration of the redox agent is 0.003 ‰, the concentration of the azodiisobutyronitrile is 0.15 ‰, the urea concentration is 2.5-3.5%, the pH value is 7.5, the concentration of the complexing agent is 0.012 ‰, and the concentration of the chain transfer agent is 0.06 ‰.
6. The polymerization reaction kettle for producing polyacrylamide as recited in claim 1, wherein: the polymerization initiator in the polymerization reaction kettle is composed of S-20 emulsifier and light oil in proportion.
7. The polymerization reaction kettle for producing polyacrylamide as recited in claim 1, wherein: the ratio of the S-20 emulsifier to the light oil is 2: 8.
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| CN202110700157.5A CN113262748A (en) | 2021-06-23 | 2021-06-23 | Polymerization kettle for producing polyacrylamide |
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| CN202110700157.5A CN113262748A (en) | 2021-06-23 | 2021-06-23 | Polymerization kettle for producing polyacrylamide |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003211112A (en) * | 2002-01-18 | 2003-07-29 | Ichiro Ihara | Glass wiping apparatus |
| CN1648140A (en) * | 2004-12-28 | 2005-08-03 | 大庆东昊投资有限公司 | Method for preparing high molecular weight cation type polyacrylamide |
| CN101372524A (en) * | 2008-10-17 | 2009-02-25 | 四川通丰科技有限公司 | Process for producing cation polyacrylamide |
| CN104645924A (en) * | 2015-02-04 | 2015-05-27 | 湖州申祥丝织有限责任公司 | Reaction kettle |
| CN110746550A (en) * | 2019-10-09 | 2020-02-04 | 中国石油天然气股份有限公司 | Multi-component copolymer containing long-chain side group and preparation and application thereof |
| CN211303037U (en) * | 2019-11-06 | 2020-08-21 | 沈阳宏城精细化工科技有限公司 | Reaction kettle for chemical industry |
| CN211913759U (en) * | 2020-01-06 | 2020-11-13 | 杭州方周科技有限公司 | Water-based emulsion reaction device |
-
2021
- 2021-06-23 CN CN202110700157.5A patent/CN113262748A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003211112A (en) * | 2002-01-18 | 2003-07-29 | Ichiro Ihara | Glass wiping apparatus |
| CN1648140A (en) * | 2004-12-28 | 2005-08-03 | 大庆东昊投资有限公司 | Method for preparing high molecular weight cation type polyacrylamide |
| CN101372524A (en) * | 2008-10-17 | 2009-02-25 | 四川通丰科技有限公司 | Process for producing cation polyacrylamide |
| CN104645924A (en) * | 2015-02-04 | 2015-05-27 | 湖州申祥丝织有限责任公司 | Reaction kettle |
| CN110746550A (en) * | 2019-10-09 | 2020-02-04 | 中国石油天然气股份有限公司 | Multi-component copolymer containing long-chain side group and preparation and application thereof |
| CN211303037U (en) * | 2019-11-06 | 2020-08-21 | 沈阳宏城精细化工科技有限公司 | Reaction kettle for chemical industry |
| CN211913759U (en) * | 2020-01-06 | 2020-11-13 | 杭州方周科技有限公司 | Water-based emulsion reaction device |
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Application publication date: 20210817 |