CN218609348U - Perfluoroalkyl ethyl alkoxysilane apparatus for producing - Google Patents
Perfluoroalkyl ethyl alkoxysilane apparatus for producing Download PDFInfo
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- CN218609348U CN218609348U CN202221872921.3U CN202221872921U CN218609348U CN 218609348 U CN218609348 U CN 218609348U CN 202221872921 U CN202221872921 U CN 202221872921U CN 218609348 U CN218609348 U CN 218609348U
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model belongs to the technical field of chemical production and discloses a perfluoroalkyl ethyl alkoxy silane production device.A fluoroolefin tank is connected with a saturated alcohol metering tank through a pipeline, and the saturated alcohol metering tank is connected with a reaction kettle; the upper end of the reaction kettle is respectively connected with a silane metering tank and a tail gas absorption tower, and the silane metering tank is connected with a perfluoroalkyl ethyl trichlorosilane tank; the tail gas absorption tower is connected with a tail gas tower circulating pump, and the tail gas tower circulating pump is connected with a wastewater collection tank connecting pipe; the reaction kettle is connected with the distillation kettle, the distillation kettle is connected with the condenser, and the condenser is connected with the material receiving storage tank connecting pipe; the reaction kettle is provided with a jacket, a steam heating pipeline with a regulating valve and a drainage pipeline; a pressure detector is arranged above the reaction kettle; 1 temperature detector is respectively arranged above the reaction kettle and inserted into the middle lower part. The utility model is used for producing perfluoroalkylethyl alkoxysilane, the utility model has the characteristics of simple structure, reliable and stable, the yield is high, and the cost is lower.
Description
Technical Field
The utility model belongs to the technical field of chemical production, especially, relate to a perfluoroalkylethyl alkoxysilane apparatus for producing.
Background
At present, perfluoroalkylethylalkoxysilane is an important fluorine-containing fine chemical and intermediate, and plays an important role in a surfactant due to excellent performance. It is applicable to coating, fabric, petroleum industry, etc. At the present time, a few developed countries such as the United states, germany, etc. in the world monopolize the production technology of such fluorine-containing fine chemicals. The existing production equipment of the perfluoroalkyl ethyl alkoxy silane has the advantages of complex structure, poor stability, low yield and high cost.
Through the above analysis, the problems and defects of the prior art are as follows: the prior production technology of the perfluoroalkylethyl alkoxysilane has the disadvantages of complex process, poor stability, low yield and high cost.
SUMMERY OF THE UTILITY MODEL
To the problems existing in the prior art, the utility model provides a perfluoroalkyl ethyl alkoxy silane apparatus for producing.
The utility model is realized in such a way that a perfluoroalkyl ethyl alkoxy silane production device is provided with a fluoroolefin tank; the fluoroolefin tank is connected with a saturated alcohol metering tank through a pipeline, and the saturated alcohol metering tank is connected with the reaction kettle;
the upper end of the reaction kettle is respectively connected with a silane metering tank and a tail gas absorption tower, and the silane metering tank is connected with a perfluoroalkyl ethyl trichlorosilane tank;
the tail gas absorption tower is connected with a tail gas tower circulating pump, and the tail gas tower circulating pump is connected with a wastewater collection tank connecting pipe; the reaction kettle is connected with the distillation kettle, the distillation kettle is connected with the condenser, and the condenser is connected with the material receiving storage tank connecting pipe.
Further, the reaction kettle is provided with a jacket, a steam heating pipeline with a regulating valve and a drain pipeline; a pressure detector is arranged above the reaction kettle; 1 temperature detector is respectively arranged above the reaction kettle and inserted into the middle lower part.
Further, a stirrer is arranged in the reaction kettle, and is provided with an impeller which is positioned on a connecting line between the lower seal head and the cylinder body; the stirrer is provided with a speed reducer and variable frequency speed regulation.
Further, the reation kettle below is provided with the sampling tube, and the reation kettle top is provided with the rupture disk, and the reation kettle top is provided with the vacuum pipe mouth.
Further, a nitrogen pipe orifice is arranged above the reaction kettle, and a material inlet is arranged above the reaction kettle and is connected with a feeding pipe; a pressure detector is arranged above the reaction kettle, and 1 temperature detector is respectively arranged above and below the reaction kettle; and a tail gas pipe is arranged above the reaction kettle and connected with a tail gas absorption tower.
Further, the silane metering tank is provided with a feeding and discharging pipe orifice and an electronic scale, and 1 temperature detector is arranged above the silane metering tank and inserted into the middle lower part of the silane metering tank;
the silane metering tank is provided with an equipment pipe orifice which is connected with a corresponding pipeline through a metal hose, and the installation position of the equipment pipe orifice is higher than that of the reaction kettle; the silane metering tank is provided with a jacket, a steam heating pipeline with a regulating valve and a drainage pipeline, and the steam heating pipeline is provided with the regulating valve.
Further, the saturated alcohol metering tank is provided with a feeding and discharging pipe opening and an electronic scale, the saturated alcohol metering tank is provided with a saturated alcohol metering tank feeding pipe, and the saturated alcohol metering tank feeding pipe is provided with a stop valve.
Furthermore, the tail gas absorption tower is provided with a circulating pump, the tail gas absorption tower is provided with a filler section, and the tail gas absorption tower is provided with a spray pipe which adopts a spiral spray head.
Further, the distillation kettle is provided with a jacket and a heat conduction oil heating pipeline with a regulating valve; the distillation kettle is provided with a double-layer flap stirrer, and the double-layer flap stirrer is provided with a speed reducer and a variable frequency speed regulator;
a gas phase pipe is arranged above the distillation still and connected below the condenser; the condenser below of stills top is provided with the discharging pipe, and the discharging pipe is provided with sight glass and sample connection, is provided with the ball valve around sight glass and the sample connection, and the stills below is provided with the discharge gate.
Further, the condenser adopts a tube array jacket structure, and a jacket is provided with a circulating water cooling structure and a steam heating structure; the condenser is provided with a jacket circulating water cooling return pipe, and the jacket circulating water cooling return pipe is provided with a thermometer.
In combination with the technical problems of the above technical solutions and solutions, please analyze from the following aspects the utility model discloses the advantages and positive effects that technical solution to be protected possessed are:
first, to the technical problem that above-mentioned prior art exists and the degree of difficulty of solving this problem, combine closely the utility model discloses an in-process result and data etc. of technical scheme and the research and development that will protect, analyze in detail, deeply the utility model discloses how technical scheme solves's technical problem, some that bring after the solution problem possess creative technological effect. The specific description is as follows:
(1) The fluoroolefin and the hydrogen-containing alkoxy silane are obtained by reaction, the process method is not perfect, and the unit consumption of the product is high.
(2) The existing device system has the advantages of low automation level, frequent manual operation and short stable operation period.
(3) The utility model is used for producing perfluoroalkyl ethyl alkoxy silane, and has the characteristics of simple process, stability, reliability, high yield, lower cost and the like.
(4) Reacting perfluoroalkyl ethyl trichlorosilane with methanol under the action of sodium methoxide to obtain a crude product, and rectifying the crude product to obtain a perfluoroalkyl ethyl alkoxy silane product with the purity of more than 98 percent.
The second, regard technical scheme as a whole or from the angle of product, the utility model discloses technical effect and advantage that technical scheme to protect possessed, the concrete description is as follows:
the utility model discloses fraction before the first stage distillation, preceding fraction return reation kettle and do the raw materials, and second stage distillation product is received according to condenser import pipe temperature TI705 interval, and sampling tube SC through condenser bottom discharging pipe samples every hour, and the product is received the material interval and is greater than 98%.
Drawings
FIG. 1 is a schematic structural diagram of a perfluoroalkylethylalkoxysilane production apparatus provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of a perfluoroalkylethylalkoxysilane structure provided by an embodiment of the present invention;
FIG. 3 (a) is a schematic diagram of a connection of a part of a fluoroolefin tank 1 of the structure of a perfluoroalkylethylalkoxysilane production apparatus provided in FIG. 2 according to an embodiment of the present invention;
FIG. 3 (b) is a schematic diagram showing a connection of a part of a reaction tank of the structure of the perfluoroalkylethylalkoxysilane production apparatus provided in FIG. 2 according to an embodiment of the present invention;
FIG. 3 (c) is a schematic diagram showing a connection between a distillation still part of the structure of the perfluoroalkylethylalkoxysilane production apparatus provided in FIG. 2 according to an embodiment of the present invention;
in the figure: 1. a fluoroolefin tank; 2. a saturated alcohol metering tank; 3. a reaction kettle; 4. a perfluoroalkylethyl trichlorosilane tank; 5. a silane metering tank; 6. a tail gas absorption tower; 7. a wastewater collection tank connecting pipe; 8. a distillation kettle; 9. a condenser; 10. the material receiving storage tank is connected with a pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
1. Illustrative embodiments are explained. This section is an explanatory embodiment for expanding the technical solutions of the claims so as to make those skilled in the art fully understand how to implement the present invention.
As shown in FIG. 1, the apparatus for producing perfluoroalkylethylalkoxysilane according to the embodiment of the present invention comprises: a saturated alcohol metering tank 2, a reaction kettle 3, a silane metering tank 5, a tail gas absorption tower 6, a wastewater collection tank 7, a distillation kettle 8 and a condenser 9; fluoroolefin jar 1 passes through the pipeline and is connected with saturated mellow metering tank 2, and saturated mellow metering tank 2 is connected with reation kettle 3, and 3 upper ends of reation kettle respectively with silane metering tank 5 and tail gas absorption tower 6, and silane metering tank 5 is connected with perfluoroalkyl ethyl trichlorosilane jar 4. The tail gas absorption tower 6 is connected with a tail gas tower circulating pump, and the tail gas tower circulating pump is connected with a waste water collecting tank connecting pipe 7. Reaction kettle 3 is connected with stills 8, and stills 8 is connected with condenser 9, and condenser 9 is connected with receipts material storage tank connecting pipe 10.
The reaction kettle 3 is provided with a jacket, a steam heating pipeline with a regulating valve and a drain pipeline; a pressure detector is arranged above the reaction kettle 3; 1 temperature detector is arranged above the reaction kettle 3 and inserted into the middle lower part; a stirrer is arranged in the reaction kettle 3, the stirrer is provided with an impeller, the impeller is positioned on a connecting line between the lower end enclosure and the barrel, the upper part and the lower part are 0.1-0.2D, D is the diameter of the barrel of the reaction kettle, and the stirrer is provided with a speed reducer and a variable-frequency speed regulator; a sampling tube is arranged below the reaction kettle 3 and is used for analyzing and detecting the process of a reaction product; a rupture disk is arranged above the reaction kettle 3 and used for preventing overpressure, and a discharge pipe is introduced into a tail gas treatment system; a vacuum pipe orifice is arranged above the reaction kettle 3 and used for removing air before reaction; a nitrogen pipe orifice is arranged above the reaction kettle 3 and is used for reaction auxiliary discharging, kettle internal replacement and the like; a material inlet is arranged above the reaction kettle 3 and is connected with a feeding pipe. A pressure detector is arranged above the reaction kettle 3, and 1 temperature detector is respectively arranged above and below the reaction kettle 3. And a tail gas pipe is arranged above the reaction kettle 3 and connected with a tail gas absorption tower 6 for absorbing the residual tail gas of the reaction system.
The silane metering tank 5 is provided with a feeding and discharging pipe orifice and an electronic scale, and 1 temperature detector is arranged above the silane metering tank and inserted into the middle lower part; silane metering tank 5 is provided with the equipment mouth of pipe, and the equipment mouth of pipe is higher than reation kettle 3 through metal collapsible tube with correspond the pipe connection, mounted position, is favorable to throwing the material. The silane metering tank 5 is provided with a jacket, a steam heating pipeline with an adjusting valve and a drainage pipeline, wherein the steam heating pipeline is provided with the adjusting valve, is interlocked with a thermometer and is used for controlling the temperature of materials.
Saturated alcohol metering tank 2 is provided with business turn over material mouth of pipe, electronic scale, and saturated alcohol metering tank 2 is provided with the equipment mouth of pipe, and the equipment mouth of pipe is through metal collapsible tube with correspond the pipe connection, and the mounted position is higher than reation kettle 3, is favorable to throwing the material. The saturated alcohol metering tank 2 is provided with a feeding pipe which is provided with a stop valve, and the feeding pipe is interlocked with an electronic scale and pressure and is used for supplementing materials and preventing overfilling.
The tail gas absorption tower 6 is provided with a circulating pump for spraying and treating tail gas. The tail gas absorption tower 6 is provided with a packing section with the height of 1-3D (the diameter of the tower), and is provided with a pall ring or a Taylor rosette for providing a tail gas absorption interface. The tail gas absorption tower 6 is provided with a spray pipe, and the spray pipe adopts a spiral spray head.
The distillation kettle 8 is provided with a jacket and a heat conduction oil heating pipeline with a regulating valve; the distillation kettle 8 is provided with a double-layer flap stirrer, the diameter of the stirring blade is 0.7-0.9D (the diameter of the kettle barrel), and the double-layer flap stirrer is provided with a speed reducer and a variable frequency speed regulator; a gas phase pipe is arranged above the distillation still 8 and connected below the condenser, the diameter of the gas phase pipe is 0.1-0.2D (the diameter of the kettle barrel), and the gas phase pipe is connected from the upper part of the condenser; a discharging pipe is arranged below the condenser above the distillation still 8, the discharging pipe is provided with a viewing mirror and a sampling port, and ball valves are arranged in front of and behind the viewing mirror and the sampling port. A discharge hole with the diameter of 0.2-0.3D (the diameter of the kettle barrel) is arranged below the distillation kettle 8 and used for cleaning.
The condenser 9 adopts a tube array jacket structure, a jacket is provided with a circulating water cooling structure and a steam heating structure, the condenser 9 is provided with a jacket circulating water cooling water return pipe, and the jacket circulating water cooling water return pipe is provided with a thermometer.
The utility model discloses a theory of operation does: raw material silane and saturated alcohol are metered into a reaction kettle 3 for reaction, a reaction product is placed into a distillation kettle 8, the reaction product is distilled to obtain a crude product, unreacted tail gas enters a tail gas absorption tower 6 for absorption, and the unreacted tail gas is obtained after the reaction.
As shown in fig. 2, the method specifically includes the following steps:
before the reaction, a nitrogen pipe valve above the reaction kettle 3 is opened, nitrogen is added into the whole system for replacement, then a vacuum pipe valve is opened to vacuumize the system, and the steps are repeated until the oxygen content of the system is less than 100ppm.
Methanol was charged into the saturated alcohol metering vessel 2 in the required amount, and when the level meter W1A601 for detecting the liquid level of the fluoroolefin tank 1 reached the set value, the valve HS701 for feeding the fluoroolefin tank 1 was closed.
A valve HS702 for communicating the fluoroolefin tank 1 with the reaction kettle 3 is opened, and the metered methanol is added into the reaction kettle 3.
Sodium methoxide was charged into the saturated alcohol metering tank 2 in the required amount, and when W1a601 reached the set value, the valve HS701 was closed.
Opening a valve HS702, and adding metered sodium methoxide into the reaction kettle 3, wherein the adding amount is 1/2 of the total amount;
the jacket steam of the silane metering tank 5 is opened, a temperature detector TI701 in the silane metering tank 5 is controlled to be 40-60 ℃ through a regulating valve, and the perfluoroalkyl ethyl trichlorosilane is loaded into the silane metering tank 5 according to the required quantity.
The jacket steam of the reaction kettle 3 is opened, and a temperature detector TI702 positioned in the reaction kettle 3 is controlled to be 60-90 ℃ by a regulating valve.
The stirring speed is set to be 100-300 r/min.
And opening a valve HS702, uniformly adding the perfluoroalkyl ethyl trichlorosilane into the reaction kettle 3 to start reaction, and controlling the temperature and the pressure to be stable, wherein the pressure is less than 0.3MPa.
And supplementing sodium methoxide twice in the reaction process, wherein the first supplementing time is 2-3 hours after the reaction is carried out, and the second supplementing time is 4-6 hours after the reaction is carried out.
The liquid level of the reaction kettle 3 is 20-60%, the feeding is stopped when the liquid level exceeds 60%, and the reaction condition is judged by sampling and analyzing the reactant content through a sampling point SC.
After the reaction is finished, the feeding valve and the steam valve are closed, and the temperature of the kettle is reduced to below 30 ℃.
And (3) opening a circulating pump of the tail gas absorption tower before the reaction is finished, operating the tail gas absorption system, opening a valve of a tail gas treatment pipeline from the reaction kettle to the tail gas absorption tower after the temperature of the kettle is reduced, and absorbing the residual tail gas in the kettle through the absorption tower.
The reaction material in reaction vessel 3 was placed in distillation vessel 8 (V703) and distilled. The distillation system was purged with nitrogen before distillation.
Vacuum distillation is adopted, and the pressure is less than-0.095 MPa; the temperature TIR704 of the distillation still 8 is controlled to be 100-250 ℃.
The first stage distills front fraction, the front fraction returns to the reaction kettle to be used as raw material, the second stage distills product, the material is collected according to the temperature TI705 interval of an inlet pipe of the condenser, the sampling pipe SC of a discharge pipe at the bottom of the condenser samples every hour, and the product collection interval is more than 98%.
Wherein, FIG. 3 (a) is a connection diagram of a part of a fluoroolefin tank 1 of the structure of a perfluoroalkylethylalkoxysilane production apparatus provided in FIG. 2, provided in an embodiment of the present invention; FIG. 3 (b) is a schematic diagram showing a connection between a part of a reaction tank of the structure of the perfluoroalkylethylalkoxysilane production apparatus shown in FIG. 2 according to an embodiment of the present invention; FIG. 3 (c) is a schematic diagram showing a still part of the structure of a perfluoroalkylethylalkoxysilane production apparatus provided in FIG. 2 according to an embodiment of the present invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be covered within the protection scope of the present invention by those skilled in the art within the technical scope of the present invention.
Claims (10)
1. A perfluoroalkylethylalkoxysilane production apparatus, characterized in that it is provided with:
a fluoroolefin tank;
the fluoroolefin tank is connected with a saturated alcohol metering tank through a pipeline, and the saturated alcohol metering tank is connected with the reaction kettle;
the upper end of the reaction kettle is respectively connected with a silane metering tank and a tail gas absorption tower, and the silane metering tank is connected with a perfluoroalkyl ethyl trichlorosilane tank;
the tail gas absorption tower is connected with a tail gas tower circulating pump, and the tail gas tower circulating pump is connected with a wastewater collection tank connecting pipe; the reaction kettle is connected with the distillation kettle, the distillation kettle is connected with the condenser, and the condenser is connected with the material receiving storage tank connecting pipe.
2. A perfluoroalkylethylalkoxysilane production apparatus according to claim 1, wherein said reaction vessel is provided with a jacket, a steam heating line and a drain line equipped with a regulating valve; a pressure detector is arranged above the reaction kettle; 1 temperature detector is respectively arranged above the reaction kettle and inserted into the middle lower part.
3. The apparatus for producing perfluoroalkylethyl alkoxysilane according to claim 1, wherein a stirrer is disposed in the reaction vessel, the stirrer has an impeller, and the impeller is disposed on a connecting line between the lower seal head and the vessel body; the stirrer is provided with a speed reducer and variable frequency speed regulation.
4. The apparatus for producing perfluoroalkylethyl alkoxysilane according to claim 1, wherein a sampling tube is provided below the reaction vessel, a rupture disk is provided above the reaction vessel, and a vacuum nozzle is provided above the reaction vessel.
5. The apparatus for producing perfluoroalkylethyl alkoxysilane according to claim 1, wherein a nitrogen pipe port is provided above the reaction vessel, and a material inlet is provided above the reaction vessel and connected to a feed pipe; a pressure detector is arranged above the reaction kettle, and 1 temperature detector is respectively arranged above and below the reaction kettle; and a tail gas pipe is arranged above the reaction kettle and connected with a tail gas absorption tower.
6. A perfluoroalkylethylalkoxysilane production apparatus according to claim 1, wherein said silane measuring tank is provided with a feed/discharge nozzle and an electronic scale, and 1 temperature detector is provided above and inserted into the lower middle part;
the silane metering tank is provided with an equipment pipe orifice which is connected with a corresponding pipeline through a metal hose, and the installation position of the equipment pipe orifice is higher than that of the reaction kettle; the silane metering tank is provided with a jacket, a steam heating pipeline with a regulating valve and a drainage pipeline, and the steam heating pipeline is provided with the regulating valve.
7. The apparatus for producing perfluoroalkylethyl alkoxysilane according to claim 1, wherein the saturated alcohol measuring tank is provided with a feed/discharge port and an electronic scale, and the saturated alcohol measuring tank is provided with a saturated alcohol measuring tank feed pipe provided with a shut-off valve.
8. The apparatus for producing perfluoroalkylethyl alkoxysilane according to claim 1, wherein the tail gas absorption tower is provided with a circulation pump, the tail gas absorption tower is provided with a packing section, and the tail gas absorption tower is provided with a spray pipe, and the spray pipe is a spiral spray head.
9. The apparatus for producing perfluoroalkylethylalkoxysilane as claimed in claim 1, wherein said distillation vessel is provided with a jacket, a heat transfer oil heating line equipped with an adjusting valve; the distillation kettle is provided with a double-layer flap stirrer, and the double-layer flap stirrer is provided with a speed reducer and a variable frequency speed regulator;
a gas phase pipe is arranged above the distillation still and connected below the condenser; the condenser below of stills top is provided with the discharging pipe, and the discharging pipe is provided with sight glass and sample connection, is provided with the ball valve around sight glass and the sample connection, and the stills below is provided with the discharge gate.
10. The apparatus for producing perfluoroalkylethyl alkoxysilane according to claim 1, wherein the condenser has a tube-in-tube jacket structure, and the jacket has a circulating water cooling structure and a steam heating structure; the condenser is provided with a jacket circulating water cooling return pipe, and the jacket circulating water cooling return pipe is provided with a thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221872921.3U CN218609348U (en) | 2022-07-18 | 2022-07-18 | Perfluoroalkyl ethyl alkoxysilane apparatus for producing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221872921.3U CN218609348U (en) | 2022-07-18 | 2022-07-18 | Perfluoroalkyl ethyl alkoxysilane apparatus for producing |
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| CN218609348U true CN218609348U (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221872921.3U Active CN218609348U (en) | 2022-07-18 | 2022-07-18 | Perfluoroalkyl ethyl alkoxysilane apparatus for producing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115318224A (en) * | 2022-07-18 | 2022-11-11 | 福建三农新材料有限责任公司 | Perfluoroalkyl ethyl alkoxy silane production device and control method thereof |
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2022
- 2022-07-18 CN CN202221872921.3U patent/CN218609348U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115318224A (en) * | 2022-07-18 | 2022-11-11 | 福建三农新材料有限责任公司 | Perfluoroalkyl ethyl alkoxy silane production device and control method thereof |
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Denomination of utility model: A production device for perfluoroalkyl ethyl alkoxysilane Effective date of registration: 20230925 Granted publication date: 20230314 Pledgee: Industrial and Commercial Bank of China Limited Sanming Sanyuan Branch Pledgor: FUJIAN SANNONG NEW MATERIALS CO.,LTD. Registration number: Y2023980058306 |