CN209772094U - Esterification reaction system for resin - Google Patents
Esterification reaction system for resin Download PDFInfo
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- CN209772094U CN209772094U CN201920157631.2U CN201920157631U CN209772094U CN 209772094 U CN209772094 U CN 209772094U CN 201920157631 U CN201920157631 U CN 201920157631U CN 209772094 U CN209772094 U CN 209772094U
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- paddle
- water outlet
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- 238000005886 esterification reaction Methods 0.000 title claims abstract description 24
- 239000011347 resin Substances 0.000 title claims abstract description 24
- 229920005989 resin Polymers 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 238000003756 stirring Methods 0.000 claims abstract description 40
- 238000006243 chemical reaction Methods 0.000 claims abstract description 37
- 238000010992 reflux Methods 0.000 claims abstract description 26
- 239000011521 glass Substances 0.000 claims description 13
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 5
- 238000009776 industrial production Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 description 23
- 239000007788 liquid Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000025 natural resin Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229920001800 Shellac Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000004208 shellac Substances 0.000 description 1
- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 description 1
- 229940113147 shellac Drugs 0.000 description 1
- 235000013874 shellac Nutrition 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
An esterification reaction system for resin comprises a stirring component, a reaction kettle and a reflux component; the reaction kettle comprises a cylinder and an end enclosure, the upper end of the cylinder is connected with the end enclosure through a bolt, a kettle bottom valve is arranged at the lower end of the cylinder, a jacket is arranged on the outer side of the cylinder, and the upper end of the end enclosure is fixedly connected with the backflow component; the reflux assembly comprises a steam pipe, a condenser, a separator and a reflux pipe, the lower end of the steam pipe is fixedly connected with the upper end of the seal head, the upper end of the steam pipe is fixedly connected with the condenser, the condenser is connected with the separator through a pipeline, the middle part of the separator is connected with the upper end of the seal head through the reflux pipe, a sight hole is formed in the middle part of the separator, and the lower end of the separator is fixedly connected with a water outlet pipe; the backflow pipe is provided with a backflow valve, and the water outlet pipe is provided with a water outlet valve. The esterification reaction system has the advantages of simple structure, small occupied area, convenient maintenance, easy operation and suitability for industrial production.
Description
Technical Field
The utility model relates to an esterification reaction system for resin belongs to the chemical industry equipment field.
Background
the resin is divided into natural resin and synthetic resin, and the natural resin refers to amorphous organic substances obtained from animal and plant secretion in nature, such as rosin, amber, shellac, etc. The synthetic resin refers to a resin product obtained by chemical synthesis of simple organic matters or chemical reaction of some natural products, such as phenolic resin, polyvinyl chloride resin and the like, wherein the synthetic resin is a main component of plastics. Currently, resins are widely used in various fields, and the resins become an important chemical raw material.
the viscosity of the resin is high, the requirement on stirring in the production process is high, and the conventional production stirring equipment cannot realize uniform stirring, so that the conditions of insufficient reaction, increased byproducts and the like are caused; in addition, in the production process of the resin, one step of important esterification reaction is required, the esterification reaction needs to be carried out in a high-temperature reflux state in the reaction process, water is generated in the esterification reaction, the water in the reaction system needs to be removed in time for ensuring the conversion rate of the reaction, and the reflux quantity of the solvent during high-temperature reflux in the reaction system needs to be ensured. The conventional solvent reflux and moisture removal device is often complex, the occupied area of equipment is large, the maintenance is troublesome, the operation is inconvenient, and the device is not suitable for industrial production.
SUMMERY OF THE UTILITY MODEL
The utility model discloses not enough to prior art exists, provide a simple structure, it is small, easy and simple to handle, it is convenient to overhaul, and the stirring is suitable, is fit for industrial production's esterification reaction system moreover.
The utility model provides an above-mentioned technical problem's technical scheme as follows: an esterification reaction system for resin comprises a stirring component, a reaction kettle and a reflux component;
The stirring assembly comprises a rack, a motor and a stirring paddle, the lower end of the rack is fixedly connected with the upper end of the reaction kettle, the upper end of the rack is fixedly connected with the motor, the motor is fixedly connected with the stirring paddle, and the stirring paddle is arranged in the reaction kettle;
the reaction kettle comprises a barrel and an end enclosure, the upper end of the barrel is connected with the end enclosure through a bolt, a kettle bottom valve is arranged at the lower end of the barrel, a jacket is arranged on the outer side of the barrel, an inlet is arranged at the lower end of the jacket, an outlet is arranged at the upper end of the jacket, a heating medium is introduced into the jacket for heating and heat preservation of the barrel, a feeding pipe is fixedly connected to the upper end of the end enclosure, and the upper end of the end enclosure is fixedly connected with the backflow component;
the reflux assembly comprises a steam pipe, a condenser, a separator and a reflux pipe, the lower end of the steam pipe is fixedly connected with the upper end of the seal head, the upper end of the steam pipe is fixedly connected with the condenser, the condenser is connected with the separator through a pipeline, the middle part of the separator is connected with the upper end of the seal head through the reflux pipe, a sight hole is formed in the middle part of the separator, and the lower end of the separator is fixedly connected with a water outlet pipe; the backflow pipe is provided with a backflow valve, and the water outlet pipe is provided with a water outlet valve. Under the condition of high temperature, the evaporated solvent and water enter a condenser through a steam pipe to be condensed into liquid, the liquid solvent and water enter a separator to realize layering, the water is on the lower layer, the solvent is on the upper layer, the layering condition in the separator is observed through a sight hole, a reflux valve is opened, the solvent on the upper layer returns to a reaction kettle through a reflux pipe, then a water outlet valve is opened, the water on the lower layer is discharged from a water outlet pipe, and therefore the reflux of the solvent and the removal of moisture are realized.
Furthermore, the motor is provided with a speed reducer, and the speed reducer is convenient for controlling the stirring speed.
Further, the stirring paddle comprises a paddle rod, a lower turbine type paddle, a propulsion type paddle and an upper turbine type paddle, and the paddle rod is sequentially sleeved with the lower turbine type paddle, the propulsion type paddle and the upper turbine type paddle from bottom to top; in the stirring process, the lower turbine type blade and the upper turbine type blade can generate radial flow, the shearing force is large, and the stirring device is suitable for stirring a high-viscosity system; the propelling type propeller blades can generate axial flow, the circulation volume is large, the stirring power is small, and the structure is simple. The lower turbine type blade, the propulsion type blade and the upper turbine type blade are mutually matched to be beneficial to uniform stirring of a high-viscosity system, and the device is small in power, simple in structure and more suitable for industrial production.
furthermore, the lower end of the stirring paddle is provided with a fixing rod, the lower end inside the reaction kettle is provided with a fixing sleeve, and the fixing rod is inserted into the fixing sleeve, so that the inner wall of the reaction kettle can be prevented from being touched by the stirring paddle in the stirring process, and the normal operation of stirring is influenced.
Further, a temperature sensor is arranged inside the barrel, a support is arranged on the side face of the upper end of the barrel, and the support is convenient for mounting and fixing the reaction kettle.
Furthermore, the upper end of the seal head is fixedly connected with a pressure gauge, so that the pressure condition in the reaction kettle can be observed at any time; head upper end fixedly connected with balance tube, the balance tube is equipped with the balanced valve, and when reation kettle internal pressure was too high, the balanced valve can be opened, makes the pressure in the reation kettle balanced with external atmospheric pressure, avoids the pressure too high, leads to reation kettle's damage.
Further, the head with be equipped with the rubber gasket between the barrel, the setting of rubber gasket more does benefit to the sealed between head and the barrel, avoids among the reaction sequence solvent to be volatilized, leads to material waste and environmental pollution.
Further, the separator upper end fixedly connected with balance tube, balance tube is equipped with the balanced valve, and the setting of balance tube and balanced valve is used for the pressure in the balanced separator, avoids the separator internal pressure too high or low excessively, and influences the backward flow of solvent.
furthermore, the middle part of the water outlet pipe is provided with a sight glass, the sight glass is positioned above the water outlet valve, a circulating pipe is fixedly connected between the water outlet pipe and the return pipe, the connecting part of the circulating pipe and the water outlet pipe is positioned above the sight glass, and the circulating pipe is provided with a circulating valve. When the solvent and the water in the separator are less, the water outlet valve can be directly opened, the water in the lower layer in the separator is discharged from the water outlet pipe, the water outlet valve is closed and the circulating valve is opened when the layered interface of the solvent and the water is seen through the observation of a sight glass, so that the solvent in the separator returns to the reaction kettle through the circulating pipe.
furthermore, the condenser is a horizontal condenser, and the horizontal condenser can avoid the problem that the whole esterification reaction system is too high in height and inconvenient to install and maintain.
The utility model has the advantages that: the reflux of the solvent and the removal of moisture are realized in a liquid separation mode of the separator, no complex and precise equipment is provided, the structure is simple, the occupied area is small, and the overhaul is convenient; the separation condition of the solvent and the water can be visually observed through the sight hole and the sight glass, the operation is easy, and the device is very suitable for operators in workshops and is suitable for industrial production; in addition, the lower turbine type blade, the propulsion type blade and the upper turbine type blade are matched with each other, so that the uniform stirring of a high-viscosity resin system is facilitated, the power is low, the structure is simple, and the device is more suitable for industrialization.
Drawings
FIG. 1 is a schematic view of an esterification reaction system for a resin in the example;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is a schematic view of the stirring assembly;
FIG. 4 is a schematic structural view of a reflow assembly;
FIG. 5 is a perspective view of a lower turbine blade;
FIG. 6 is a perspective view of a propulsion blade;
FIG. 7 is a perspective view of an upper turbine blade;
In the figure, 1 machine frame, 2 motor, 3 stirring paddle, 4 cylinder, 5 head, 6 bolt, 7 kettle bottom valve, 8 jacket, 9 inlet, 10 outlet, 11 inlet pipe, 12 steam pipe, 13 condenser, 14 separator, 15 return pipe, 16 sight hole, 17 outlet pipe, 18 return valve, 19 outlet valve, 20 reducer, 21 paddle rod, 22 lower turbine type paddle, 23 propelling type paddle, 24 upper turbine type paddle, 25 fixed rod, 26 fixed sleeve, 27 temperature sensor, 28 support, 29 pressure gauge, 30 balance pipe, 31 balance valve, 32 rubber gasket, 33 sight glass, 34 circulation pipe, 35 circulation valve.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in the figure, the esterification reaction system for the resin comprises a stirring component, a reaction kettle and a backflow component; the stirring assembly comprises a rack 1, a motor 2 and a stirring paddle 3, the lower end of the rack 1 is fixedly connected with the upper end of the reaction kettle, the upper end of the rack 1 is fixedly connected with the motor 2, the motor 2 is fixedly connected with the stirring paddle 3, and the stirring paddle 3 is arranged in the reaction kettle;
The reaction kettle comprises a cylinder 4 and an end enclosure 5, the upper end of the cylinder 4 is connected with the end enclosure 5 through a bolt 6, a kettle bottom valve 7 is arranged at the lower end of the cylinder 4, a jacket 8 is arranged on the outer side of the cylinder 4, an inlet 9 is arranged at the lower end of the jacket 8, an outlet 10 is arranged at the upper end of the jacket 8, a feed pipe 11 is fixedly connected to the upper end of the end enclosure 5, and the upper end of the end enclosure 5 is fixedly connected with the backflow component;
The reflux assembly comprises a steam pipe 12, a condenser 13, a separator 14 and a reflux pipe 15, the lower end of the steam pipe 12 is fixedly connected with the upper end of the seal head 5, the upper end of the steam pipe 12 is fixedly connected with the condenser 13, the condenser 13 is connected with the separator 14 through a pipeline, the middle part of the separator 14 is connected with the upper end of the seal head 5 through the reflux pipe 15, the middle part of the separator 14 is provided with a viewing hole 16, and the lower end of the separator 14 is fixedly connected with a water outlet pipe 17; the return pipe 15 is provided with a return valve 18, and the water outlet pipe 17 is provided with a water outlet valve 19.
A reducer 20 is arranged on the motor 2. The stirring paddle 3 comprises a paddle rod 21, a lower turbine type paddle 22, a propulsion type paddle 23 and an upper turbine type paddle 24, and the paddle rod 21 is sequentially sleeved with the lower turbine type paddle 22, the propulsion type paddle 23 and the upper turbine type paddle 24 from bottom to top. The lower end of the stirring paddle 3 is provided with a fixing rod 25, the lower end inside the reaction kettle is provided with a fixing sleeve 26, and the fixing rod 25 is inserted into the fixing sleeve 26. A temperature sensor 27 is arranged inside the cylinder body 4, and a support 28 is arranged on the side face of the upper end of the cylinder body 4. The upper end of the seal head 5 is fixedly connected with a pressure gauge 29, the upper end of the seal head 5 is fixedly connected with a balance pipe 30, and the balance pipe 30 is provided with a balance valve 31. A rubber gasket 32 is arranged between the seal head 5 and the cylinder body 4. The upper end of the separator 14 is fixedly connected with a balance pipe 30, and the balance pipe 30 is provided with a balance valve 31. The middle part of the water outlet pipe 17 is provided with a sight glass 33, the sight glass 33 is positioned above the water outlet valve 19, a circulating pipe 34 is fixedly connected between the water outlet pipe 17 and the return pipe 15, the connecting part of the circulating pipe 34 and the water outlet pipe 17 is positioned above the sight glass 33, and the circulating pipe 34 is provided with a circulating valve 35. The condenser 13 is a horizontal condenser.
the working principle of the esterification reaction system is as follows: after reaction raw materials and a solvent are added into the reaction kettle through a feeding pipe 11, a motor 2 is started, and the stirring speed of a stirring paddle 3 is controlled through a speed reducer 20; heating medium is introduced into the jacket 8 from the inlet 9 to heat the raw material in the cylinder 4, and the temperature condition in the reaction kettle is observed through the temperature sensor 27; under the heating condition, the solvent in the reaction kettle and the water generated by the esterification reaction are gasified, enter a condenser 13 along with a steam pipe 12, are cooled in the condenser 13 to become liquid, the liquid solvent and the water enter a separator 14, the liquid solvent and the water are layered in the separator 14, the upper layer is the solvent, the lower layer is the water, a reflux valve 18 is opened, the solvent in the upper layer returns to the reaction kettle through a reflux pipe 15, then a water outlet valve 19 is opened, the water is extracted from a water outlet pipe 17, and the layering condition in the separator 14 and the reflux condition of the solvent are observed through an observation hole 16; when the amount of the solvent and the amount of the water in the separator 14 are small, whether or not the stratification is observed by the sight glass 33, and then the circulation valve 35 is opened to return a small amount of the solvent to the reaction tank through the circulation pipe 34. The product after the reaction is discharged through a kettle bottom valve 7.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An esterification reaction system for resin is characterized by comprising a stirring component, a reaction kettle and a reflux component;
The stirring assembly comprises a rack (1), a motor (2) and a stirring paddle (3), the lower end of the rack (1) is fixedly connected with the upper end of the reaction kettle, the upper end of the rack (1) is fixedly connected with the motor (2), the motor (2) is fixedly connected with the stirring paddle (3), and the stirring paddle (3) is arranged in the reaction kettle;
The reaction kettle comprises a barrel (4) and a seal head (5), the upper end of the barrel (4) is connected with the seal head (5) through a bolt (6), a kettle bottom valve (7) is arranged at the lower end of the barrel (4), a jacket (8) is arranged on the outer side of the barrel (4), an inlet (9) is arranged at the lower end of the jacket (8), an outlet (10) is arranged at the upper end of the jacket (8), a feeding pipe (11) is fixedly connected to the upper end of the seal head (5), and the upper end of the seal head (5) is fixedly connected with the backflow component;
The reflux assembly comprises a steam pipe (12), a condenser (13), a separator (14) and a reflux pipe (15), the lower end of the steam pipe (12) is fixedly connected with the upper end of the seal head (5), the upper end of the steam pipe (12) is fixedly connected with the condenser (13), the condenser (13) is connected with the separator (14) through a pipeline, the middle part of the separator (14) is connected with the upper end of the seal head (5) through the reflux pipe (15), the middle part of the separator (14) is provided with a sight hole (16), and the lower end of the separator (14) is fixedly connected with a water outlet pipe (17); the return pipe (15) is provided with a return valve (18), and the water outlet pipe (17) is provided with a water outlet valve (19).
2. An esterification reaction system for resins according to claim 1, wherein the motor (2) is provided with a speed reducer (20).
3. the system of claim 1, wherein the stirring paddle (3) comprises a paddle rod (21), a lower turbine type paddle (22), a propulsion type paddle (23) and an upper turbine type paddle (24), and the paddle rod (21) is sleeved with the lower turbine type paddle (22), the propulsion type paddle (23) and the upper turbine type paddle (24) from bottom to top in sequence.
4. The system for the esterification reaction of resin according to claim 1, wherein the lower end of the stirring paddle (3) is provided with a fixing rod (25), the lower end of the inside of the reaction kettle is provided with a fixing sleeve (26), and the fixing rod (25) is inserted into the fixing sleeve (26).
5. an esterification reaction system for resin according to claim 1, wherein a temperature sensor (27) is provided inside the cylinder (4), and a support (28) is provided on the outer side of the upper end of the cylinder (4).
6. The esterification reaction system for resin according to claim 1, wherein a pressure gauge (29) is fixedly connected to the upper end of the head (5), a balance pipe (30) is fixedly connected to the upper end of the head (5), and the balance pipe (30) is provided with a balance valve (31).
7. An esterification reaction system for resins according to claim 1, characterized in that a rubber gasket (32) is provided between the head (5) and the barrel (4).
8. An esterification reaction system for resin according to claim 1, wherein a balance pipe (30) is fixedly connected to the upper end of the separator (14), and the balance pipe (30) is provided with a balance valve (31).
9. An esterification reaction system for resin according to claim 1, characterized in that a sight glass (33) is arranged in the middle of the water outlet pipe (17), the sight glass (33) is positioned above the water outlet valve (19), a circulation pipe (34) is fixedly connected between the water outlet pipe (17) and the return pipe (15), the connection position of the circulation pipe (34) and the water outlet pipe (17) is positioned above the sight glass (33), and the circulation pipe (34) is provided with a circulation valve (35).
10. An esterification reaction system for resins according to claim 1, wherein the condenser (13) is a horizontal condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920157631.2U CN209772094U (en) | 2019-01-29 | 2019-01-29 | Esterification reaction system for resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920157631.2U CN209772094U (en) | 2019-01-29 | 2019-01-29 | Esterification reaction system for resin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209772094U true CN209772094U (en) | 2019-12-13 |
Family
ID=68794065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920157631.2U Active CN209772094U (en) | 2019-01-29 | 2019-01-29 | Esterification reaction system for resin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209772094U (en) |
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2019
- 2019-01-29 CN CN201920157631.2U patent/CN209772094U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An esterification reaction system for resin Effective date of registration: 20220627 Granted publication date: 20191213 Pledgee: Rizhao Bank Co.,Ltd. Yantai Zhifu sub branch Pledgor: LAIYANG HONGAN CHEMICAL Co.,Ltd. Registration number: Y2022980009131 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20191213 Pledgee: Rizhao Bank Co.,Ltd. Yantai Zhifu sub branch Pledgor: LAIYANG HONGAN CHEMICAL Co.,Ltd. Registration number: Y2022980009131 |