CN113429566B - High-performance PA66 polymerization production process and device thereof - Google Patents
High-performance PA66 polymerization production process and device thereof Download PDFInfo
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- CN113429566B CN113429566B CN202110822291.2A CN202110822291A CN113429566B CN 113429566 B CN113429566 B CN 113429566B CN 202110822291 A CN202110822291 A CN 202110822291A CN 113429566 B CN113429566 B CN 113429566B
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- 229920002302 Nylon 6,6 Polymers 0.000 title claims abstract description 94
- 238000006116 polymerization reaction Methods 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000010521 absorption reaction Methods 0.000 claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 21
- 238000011084 recovery Methods 0.000 claims abstract description 17
- 239000012266 salt solution Substances 0.000 claims description 27
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 claims description 20
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 14
- 235000011037 adipic acid Nutrition 0.000 claims description 10
- 239000001361 adipic acid Substances 0.000 claims description 10
- 238000006068 polycondensation reaction Methods 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- RLSSMJSEOOYNOY-UHFFFAOYSA-N m-cresol Chemical compound CC1=CC=CC(O)=C1 RLSSMJSEOOYNOY-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/26—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
- C08G69/28—Preparatory processes
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyamides (AREA)
Abstract
The invention discloses a high-performance PA66 polymerization production process and a device thereof in the field of PA66 production, and the high-performance PA66 polymerization production process comprises a post-polymerizer, wherein the right side of the post-polymerizer is provided with a pushing mechanism extending into the post-polymerizer, the outer side of the post-polymerizer is provided with a water-cooling device connected with the ground, and the water-cooling device comprises: the cold water tank, a water pump, the heat absorption casing, air vent and recovery water tank, the cold water tank is located the right side of rear polymerization ware, recovery water tank is located the left side of rear polymerization ware, cold water tank and recovery water tank are all fixed subaerial, install the water pump in the cold water tank, the water pump leads to pipe and links to each other with the right-hand member of heat absorption casing, the heat absorption casing is installed in the outside of rear polymerization ware, the left end of heat absorption casing leads to pipe and links to each other with recovery water tank, the equipartition has a plurality of air vents on the heat absorption casing. The invention has high cooling speed to the molten nylon-66 and prevents the nylon-66 from being oxidized.
Description
Technical Field
The invention relates to the field of PA66 production, in particular to a high-performance PA66 polymerization production process and a device thereof.
Background
Polyhexamethylene adipamide, commonly known as nylon-66, is a thermoplastic resin generally prepared by the polycondensation of adipic acid and hexamethylene diamine. Insoluble in general solvents, only m-cresol, etc. High mechanical strength and hardness, and high rigidity. It can be used as engineering plastics and mechanical accessories, such as gear and lubricating bearing, and can be used to replace nonferrous metal material to make machine shell and blade of car engine, etc. and also can be used to make synthetic fibre.
At present, in the last blanking stage when the PA66 is produced, the PA66 is oxidized and yellowed after being contacted with air due to overhigh temperature, so that aiming at the current situation, the PA66 polymerization production process and the device thereof, which have high cooling speed on molten nylon-66 and high performance and can prevent the nylon-66 from being oxidized, are urgently needed to be developed so as to overcome the defects in the current practical application and meet the current requirements.
Disclosure of Invention
The invention aims to provide a high-performance PA66 polymerization production process and a device thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-performance PA66 polymerization production process comprises the following steps: step one, raw material preparation: putting hexamethylene diamine and adipic acid into different containers, and then adding water to prepare a hexamethylene diamine solution and an adipic acid solution; step two, preparing a nylon-66 salt solution: mixing the hexamethylenediamine solution prepared in the step one with an adipic acid solution, and reacting at normal temperature to obtain a nylon-66 salt solution, wherein the mass fraction of nylon-66 salt in the nylon-66 salt solution is 40-50%; step three, dehydration and concentration: adding the nylon-66 salt solution into an evaporator, wherein the heating temperature of the evaporator is 150-170 ℃, and evaporating the water in the nylon-66 salt solution to increase the mass fraction of the nylon-66 salt in the nylon-66 salt solution to 70%; step four, preheating: adding the concentrated nylon-66 salt solution into a preheater for preheating; step five, polycondensation: adding the preheated nylon-66 salt solution into a reactor for polycondensation to obtain molten nylon-66, and completely evaporating the water in the nylon-66 salt solution; step six, cooling and blanking: and feeding the molten nylon-66 obtained by polycondensation into a post-polymerizer, cooling the molten nylon-66 to 210 ℃ by a water-cooling device, and pushing the molten nylon-66 out of the post-polymerizer by a pushing mechanism.
As a further scheme of the invention: the preheating temperature of the preheater was 210 ℃.
As a further scheme of the invention: the internal temperature of the reactor was 280 ℃.
The utility model provides a device of PA66 polymerization production technology of high performance, includes the rear polymerization ware, the right side of rear polymerization ware is installed and is extended to its inside pushing equipment, the water-cooling heat sink that links to each other with ground is installed in the outside of rear polymerization ware, the water-cooling heat sink includes: cold water tank, water pump, heat absorption casing, air vent and recovery water tank, the cold water tank is located the right side of rear polymerization ware, recovery water tank is located the left side of rear polymerization ware, cold water tank and recovery water tank are all fixed subaerial, install the water pump in the cold water tank, the water pump leads to pipe and links to each other with the right-hand member of heat absorption casing, the heat absorption casing is installed in the outside of rear polymerization ware, the left end of heat absorption casing leads to pipe and links to each other with recovery water tank, the equipartition has a plurality of air vents on the heat absorption casing.
As a further scheme of the invention: the top of the post-polymerizer is provided with a feeding hole, the left end of the post-polymerizer is provided with a discharging hole, and the post-polymerizer is connected with the ground through a plurality of supporting legs.
As a further scheme of the invention: the pushing equipment includes: servo motor, first bevel gear, second bevel gear, threaded rod and base, servo motor installs on the base, the base is fixed subaerial, install first bevel gear on servo motor's the output shaft, first bevel gear's upside is installed and is rotated complex second bevel gear with it, second bevel gear installs in the right-hand member of threaded rod, the threaded rod extends to in the rear polymerization ware, the threaded rod passes through the bearing and is connected with rear polymerization ware rotation.
As a further scheme of the invention: the outer surface of the heat absorption shell is in a circular ring shape.
As a further scheme of the invention: the heat absorption shell is made of aluminum alloy.
Compared with the prior art, the invention has the beneficial effects that: according to the high-performance PA66 polymerization production process and the device thereof, molten nylon-66 enters a post-polymerizer, a servo motor drives a first bevel gear to rotate, a second bevel gear is driven to rotate by the rotation of the first bevel gear, a threaded rod is driven to rotate by the rotation of the second bevel gear, so that the nylon-66 moves along a threaded groove on the threaded rod and is finally discharged from a discharge port, meanwhile, cold water is conveyed into a heat absorption shell through a water pump, heat on the post-polymerizer is taken away through water flow, the nylon-66 is cooled to 210 ℃ and then discharged, and the nylon-66 is prevented from being oxidized and yellowing due to direct contact with air due to overhigh temperature. In conclusion, the invention has high cooling speed to the molten nylon-66 and prevents the nylon-66 from being oxidized.
Drawings
FIG. 1 is a flow chart of a high-performance PA66 polymerization production process.
FIG. 2 is a schematic diagram of the structure of a high-performance PA66 polymerization production process.
Fig. 3 is a front cross-sectional view of fig. 2 of the present invention.
Fig. 4 isbase:Sub>A view frombase:Sub>A-base:Sub>A in fig. 3 according to the present invention.
In the figure: 1-post polymerizer, 101-feeding port, 102-discharging port, 2-pushing mechanism, 201-servo motor, 202-first bevel gear, 203-second bevel gear, 204-threaded rod, 205-base, 3-water cooling device, 301-cold water tank, 302-water pump, 303-heat absorption shell, 304-vent hole, 305-recovery water tank and 4-support leg.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "first", "second" and "third" are used for the sake of clarity in describing the numbering of the components of the product and do not represent any substantial difference, unless explicitly stated or limited otherwise. The directions of "up", "down", "left" and "right" are all based on the directions shown in the drawings. Specific meanings of the above terms in the embodiments of the present invention may be understood by those of ordinary skill in the art according to specific situations.
It is to be understood that, unless otherwise expressly specified or limited, the term "coupled" is used broadly, and may, for example, refer to directly coupled devices or indirectly coupled devices through intervening media. Specific meanings of the above terms in the embodiments of the invention may be understood as specific cases by those of ordinary skill in the art.
Examples
Referring to fig. 1, in an embodiment of the present invention, a high performance PA66 polymerization production process includes the following steps:
step one, raw material preparation: putting hexamethylene diamine and adipic acid into different containers, and then adding water to prepare a hexamethylene diamine solution and an adipic acid solution; step two, preparing a nylon-66 salt solution: mixing the hexamethylenediamine solution prepared in the step one with an adipic acid solution, and reacting at normal temperature to obtain a nylon-66 salt solution, wherein the mass fraction of nylon-66 salt in the nylon-66 salt solution is 40-50%;
step three, dehydration and concentration: adding the nylon-66 salt solution into an evaporator, wherein the heating temperature of the evaporator is 150-170 ℃, and evaporating the water in the nylon-66 salt solution to increase the mass fraction of the nylon-66 salt in the nylon-66 salt solution to 70%;
step four, preheating: adding the concentrated nylon-66 salt solution into a preheater for preheating, wherein the preheating temperature of the preheater is 210 ℃;
step five, polycondensation: adding the preheated nylon-66 salt solution into a reactor for polycondensation to obtain molten nylon-66, wherein the internal temperature of the reactor is 280 ℃, and the water in the nylon-66 salt solution is completely evaporated;
step six, cooling and blanking: and (3) feeding the molten nylon-66 obtained by polycondensation into a post-polymerizer, cooling the molten nylon-66 to 210 ℃ by a water-cooling device, and then pushing the molten nylon-66 out of the post-polymerizer by a pushing mechanism.
Referring to fig. 2-4, in an embodiment of the present invention, a high-performance PA66 polymerization production apparatus includes a post-polymerizer 1, a feeding port 101 is disposed at a top of the post-polymerizer 1, molten nylon-66 after polymerization enters the post-polymerizer 1 from the feeding port 101, a temperature of the molten nylon-66 at this time is 208 ℃, a discharging port 102 is disposed at a left end of the post-polymerizer 1, the post-polymerizer 1 is connected to a ground through a plurality of support legs 4, a pushing mechanism 2 extending into the post-polymerizer 1 is installed at a right side of the post-polymerizer 1, and the pushing mechanism 2 includes: servo motor 201, first bevel gear 202, second bevel gear 203, threaded rod 204 and base 205, servo motor 201 installs on base 205, base 205 is fixed subaerial, install first bevel gear 202 on servo motor 201's the output shaft, first bevel gear 202's upside is installed with it normal running fit's second bevel gear 203, second bevel gear 203 installs the right-hand member in threaded rod 204, threaded rod 204 extends to in the post polymerizer 1, threaded rod 204 passes through the bearing and is connected with post polymerizer 1 is rotated, the water-cooling heat sink 3 that links to each other with ground is installed in the outside of post polymerizer 1, water-cooling heat sink 3 includes: the heat absorption device comprises a cold water tank 301, a water pump 302, a heat absorption shell 303, vent holes 304 and a recovery water tank 305, wherein the cold water tank 301 is located on the right side of the rear polymerizer 1, the recovery water tank 305 is located on the left side of the rear polymerizer 1, the cold water tank 301 and the recovery water tank 305 are both fixed on the ground, the water pump 302 is installed in the cold water tank 301, the water pump 302 is connected with the right end of the heat absorption shell 303 through a water pipe, the heat absorption shell 303 is installed on the outer side of the rear polymerizer 1, the outer surface of the heat absorption shell 303 is in a circular ring shape, the heat absorption shell 303 is made of aluminum alloy and has good heat absorption performance, heat on the rear polymerizer 1 can be taken away quickly, the left end of the heat absorption shell 303 is connected with the recovery water tank 305 through a water pipe, the heat absorption shell 303 is uniformly provided with the vent holes 304, and the vent holes 304 enlarge the surface area of the heat absorption shell 303, so that the heat absorption shell 303 is in contact with air more fully, and the heat dissipation speed is improved. Molten nylon-66 enters the post-polymerizer 1, the servo motor 201 drives the first bevel gear 202 to rotate, the first bevel gear 202 rotates to drive the second bevel gear 203 to rotate, the second bevel gear 203 rotates to drive the threaded rod 204 to rotate, so that the nylon-66 moves along the threaded groove on the threaded rod 204 and is finally discharged from the discharge port 102, meanwhile, cold water is conveyed into the heat absorption shell 303 through the water pump 302, heat on the post-polymerizer 1 is taken away through water flow, the nylon-66 is cooled to 210 ℃ and then discharged, and the nylon-66 is prevented from being oxidized and yellowed due to direct contact with air due to overhigh temperature.
According to the high-performance PA66 polymerization production process and the device thereof, molten nylon-66 enters the post-polymerizer 1, the servo motor 201 drives the first bevel gear 202 to rotate, the first bevel gear 202 rotates to drive the second bevel gear 203 to rotate, the second bevel gear 203 rotates to drive the threaded rod 204 to rotate, so that the nylon-66 moves along the threaded groove on the threaded rod 204 and is discharged from the discharge port 102, meanwhile, cold water is conveyed into the heat absorption shell 303 through the water pump 302, heat on the post-polymerizer 1 is taken away through water flow, the nylon-66 is cooled to 210 ℃ and then discharged, and the nylon-66 is prevented from being oxidized and yellowed due to direct contact with air due to overhigh temperature.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. A high-performance PA66 polymerization production process is characterized by comprising the following steps:
step one, raw material preparation: putting hexamethylene diamine and adipic acid into different containers, and then adding water to prepare a hexamethylene diamine solution and an adipic acid solution;
step two, preparing a nylon-66 salt solution: mixing the hexamethylenediamine solution prepared in the step one with an adipic acid solution, and reacting at normal temperature to obtain a nylon-66 salt solution, wherein the mass fraction of nylon-66 salt in the nylon-66 salt solution is 40-50%;
step three, dehydration and concentration: adding the nylon-66 salt solution into an evaporator, wherein the heating temperature of the evaporator is 150-170 ℃, and evaporating the water in the nylon-66 salt solution to increase the mass fraction of the nylon-66 salt in the nylon-66 salt solution to 70%;
step four, preheating: adding the concentrated nylon-66 salt solution into a preheater for preheating;
step five, polycondensation: adding the preheated nylon-66 salt solution into a reactor for polycondensation to obtain molten nylon-66, and completely evaporating the water in the nylon-66 salt solution;
step six, cooling and blanking: feeding the molten nylon-66 obtained by polycondensation into a post-polymerizer, cooling the molten nylon-66 to 210 ℃ by a water-cooling device, and then pushing the molten nylon-66 out of the post-polymerizer by a pushing mechanism;
the water-cooling device (3) comprises: cold water tank (301), water pump (302), heat absorption casing (303), air vent (304) and recovery water tank (305), cold water tank (301) are located the right side of post-polymerization ware (1), recovery water tank (305) are located the left side of post-polymerization ware (1), cold water tank (301) and recovery water tank (305) are all fixed subaerial, install water pump (302) in cold water tank (301), water pump (302) lead to pipe links to each other with the right-hand member of heat absorption casing (303), install in the outside of post-polymerization ware (1) heat absorption casing (303), the left end lead to pipe of heat absorption casing (303) links to each other with recovery water tank (305), the equipartition has a plurality of air vents (304) on heat absorption casing (303).
2. The high performance PA66 polymerization process of claim 1, wherein the preheater preheat temperature is 210 ℃.
3. The high performance PA66 polymerization process of claim 1, wherein the internal temperature of the reactor is 280 ℃.
4. A device for the high-performance PA66 polymerization production process according to any of claims 1-3, wherein the right side of the post-polymerizer (1) is provided with a pushing mechanism (2) extending into the post-polymerizer, and the outer side of the post-polymerizer (1) is provided with a water-cooling device (3) connected with the ground.
5. The apparatus for high-performance PA66 polymerization production process according to claim 4, wherein the top of the post-polymerizer (1) is provided with a feed inlet (101), the left end of the post-polymerizer (1) is provided with a discharge outlet (102), and the post-polymerizer (1) is connected with the ground through a plurality of legs (4).
6. The plant of a high-performance PA66 polymerization production process according to claim 4, characterized in that said pusher mechanism (2) comprises: servo motor (201), first bevel gear (202), second bevel gear (203), threaded rod (204) and base (205), servo motor (201) are installed on base (205), base (205) are fixed subaerial, install first bevel gear (202) on servo motor (201)'s the output shaft, the upside of first bevel gear (202) is installed and is rotated complex second bevel gear (203) with it, second bevel gear (203) are installed in the right-hand member of threaded rod (204), threaded rod (204) extend to in back polymerizer (1), threaded rod (204) are connected with back polymerizer (1) rotation through the bearing.
7. The plant for the polymerization production process of PA66 according to claim 4, characterized in that the external surface of the heat-absorbing shell (303) is in the shape of a circular ring.
8. The plant for the high-performance PA66 polymerization production process according to claim 7, characterized in that the heat-absorbing shell (303) is made of aluminum alloy.
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| CN202110822291.2A CN113429566B (en) | 2021-07-21 | 2021-07-21 | High-performance PA66 polymerization production process and device thereof |
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| CN103073716B (en) * | 2011-10-26 | 2016-02-03 | 江苏文凤化纤集团有限公司 | A kind of nylon 66 continuous polymerization residual heat Application way |
| CN108570148B (en) * | 2018-06-07 | 2023-10-03 | 聊城市鲁西化工工程设计有限责任公司 | Anti-oxidation nylon 6 slice polymerization production device and method |
| CN209193860U (en) * | 2018-12-03 | 2019-08-02 | 重庆晟淦新材料科技有限公司 | A kind of process units of high temperature resistant nylon |
| CN110283311B (en) * | 2019-06-26 | 2021-09-24 | 平顶山神马帘子布发展有限公司 | Production system and production method for reducing copper precipitation in nylon 66 industrial yarn production |
| CN213493724U (en) * | 2020-10-27 | 2021-06-22 | 衡水超凡新能源材料有限公司 | Cooling and recycling device for reaction furnace |
| CN112473610B (en) * | 2020-10-31 | 2022-10-11 | 山东广垠新材料有限公司 | Process and apparatus for melt polymerization of semi-aromatic polyamides |
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Denomination of invention: A high-performance PA66 polymerization production process and its device Effective date of registration: 20231214 Granted publication date: 20221014 Pledgee: China Postal Savings Bank Co.,Ltd. Rui'an City Branch Pledgor: ZHEJIANG SHINY NEW MATERIAL CO.,LTD. Registration number: Y2023980071401 |