CN114733221B - Rectifying tower for quickly heating and vaporizing materials - Google Patents
Rectifying tower for quickly heating and vaporizing materials Download PDFInfo
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- CN114733221B CN114733221B CN202210449358.7A CN202210449358A CN114733221B CN 114733221 B CN114733221 B CN 114733221B CN 202210449358 A CN202210449358 A CN 202210449358A CN 114733221 B CN114733221 B CN 114733221B
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- rectifying tower
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/26—Fractionating columns in which vapour and liquid flow past each other, or in which the fluid is sprayed into the vapour, or in which a two-phase mixture is passed in one direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/30—Fractionating columns with movable parts or in which centrifugal movement is caused
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
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Abstract
The invention provides a rectifying tower for quickly heating and vaporizing materials, which comprises: a rectifying tower; the heating kettle is arranged at the bottom of the rectifying tower; the electromagnetic heating part is arranged on the outer wall of the heating kettle and used for heating the heating kettle; the atomization device is positioned in the heating kettle and used for atomizing the material input into the heating kettle and spraying the material to the inner wall of the heating kettle; the bottom of the rectifying tower and the top of the heating kettle are sealed; a reflux chamber is arranged between the filler and the bottom of the rectifying tower; the cooling part is positioned in the backflow chamber, arranged at the bottom end of the filler and used for accelerating backflow liquid in the filler to be left in the backflow chamber; the protection part is arranged at the bottom of the heating kettle and below the atomizing device and is used for receiving or accommodating materials falling from the inner wall of the heating kettle. The invention can reduce the retention time, further avoid the defect of denaturation or coking of the thermosensitive material and improve the rectification yield.
Description
Technical Field
The invention relates to the technical field of rectifying equipment, in particular to a rectifying tower for quickly heating and vaporizing materials.
Background
In the prior art, high-boiling point and heat-sensitive materials are usually separated by high vacuum rectification, and the operating pressure is usually less than one thousand pascals. In the high vacuum rectification process, the heating and vaporization of the materials are critical, and particularly, the materials need to be heated and vaporized under high vacuum. The current devices have the following disadvantages: the high vacuum of the material heating vaporization process is less than one thousand pascal, the retention time is long, so that the material needs to be vaporized at higher temperature, partial denaturation or coking of the thermosensitive material is caused, the rectification yield is reduced, and the like. A rectification tower capable of realizing rapid temperature rise and vaporization of materials is provided by an authorization notice number CN109011676B (hereinafter referred to as 'the scheme'), and comprises a rectification tower body, a tower bottom heating kettle and an atomizer arranged in the tower bottom heating kettle, wherein the rectification tower body is provided with a tower top lifting air port and a tower top reflux port, and a filler is arranged in the rectification tower body; a feeding hole and a kettle bottom discharging hole are formed in the tower bottom heating kettle, an electromagnetic coil is wound on the outer wall of the tower bottom heating kettle, and two ends of the electromagnetic coil are connected with a temperature control circuit system; the atomizer is connected with a feed inlet pipeline on the tower bottom heating kettle, and a jet orifice is arranged at the side part of the atomizer. The rapid heating vaporization of the material can be realized, the retention time of the material on the high-temperature surface is reduced, and the denaturation and coking of the material are prevented. However, the scheme has the following defects: the liquid collecting plate is used for collecting reflux liquid flowing down from the filler, the reflux liquid flows down from the bottom of the rectifying tower body easily in the process, and the temperature is higher in the tower bottom heating kettle, so that the temperature is transferred to the bottom of the rectifying tower body, and the reflux liquid collecting efficiency is greatly influenced. The atomized materials are sprayed to the side wall of the tower bottom heating kettle through the spray opening of the atomizer, and the spray pressure of the materials after the materials come out of the spray opening can be gradually reduced, so that the spray opening of the atomizer is still short in contact time between a part of the materials and the side wall of the tower bottom heating kettle no matter the position of the spray opening is close to a part of the side wall or is equidistant to the side wall, the materials fall on the inner wall of the kettle bottom of the tower bottom heating kettle, and the defects of denaturation and coking of a part of the materials in the kettle exist.
Disclosure of Invention
The invention aims to provide a rectifying tower for quickly heating and vaporizing materials, which solves the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a rectifying tower for rapid temperature rise vaporization of materials comprises:
a rectifying tower;
the heating kettle is arranged at the bottom of the rectifying tower;
a packing disposed within the rectification column;
the electromagnetic heating part is arranged on the outer wall of the heating kettle and is used for heating the heating kettle;
the atomizing device is positioned in the heating kettle and is used for atomizing the material input into the heating kettle and spraying the material to the inner wall of the heating kettle;
the bottom of the rectifying tower and the top of the heating kettle are sealed;
a reflux chamber is arranged between the filler and the bottom of the rectifying tower;
the cooling part is positioned in the backflow chamber, arranged at the bottom end of the filler and used for accelerating backflow liquid in the filler to be left in the backflow chamber;
one end of the pipe body is penetrated into the heating kettle from the upper part of the heating kettle, and the other end of the pipe body is penetrated into the rectifying tower from the side wall of the rectifying tower;
the protection part is arranged at the bottom of the heating kettle and below the atomizing device and used for receiving or containing materials falling from the inner wall of the heating kettle.
Preferably, the cooling portion includes the cavity board, a plurality of hole of permeating water has been seted up on the cavity board, the side of cavity board is provided with the circulation nest of tubes with the cavity UNICOM of cavity board.
Preferably, the area of the upper end surface of the cavity plate is smaller than that of the bottom end of the filler.
Preferably, the cooling part includes a serpentine-shaped tube having a group of circulating tubes connected to both ends thereof.
Preferably, one end of the pipe body is connected with a branch pipe, and the end part of the branch pipe extends to the bottom end of the filler.
Preferably, the bottom of backward flow room is provided with the insulating layer, still be provided with the discharge gate on the backward flow room.
Preferably, the protection part comprises a high temperature resistant layer, the high temperature resistant layer is provided with a plurality of curved channels from top to bottom, and a concave pit and a rough surface are arranged between every two adjacent curved channels.
Preferably, a heat insulation layer is arranged between the protective part and the kettle bottom of the heating kettle, a blanking cavity is arranged between the bottom of the protective part and the heating kettle, and a discharge port at the kettle bottom is formed by penetrating the bottom of the blanking cavity into the blanking cavity.
Compared with the prior art, the invention has the beneficial effects that:
the top of the rectifying tower is connected with an air inlet pipe of the tower top condenser through a tower jacking air port, a liquid outlet pipe of the tower top condenser is divided into two paths, one path of liquid outlet pipe is connected with a tower top reflux port of the rectifying tower, and the other path of liquid outlet pipe is connected with a liquid storage tank pipe, so that the collection of a rectified product is realized. The feeding pump sends the material into the heating kettle, and the atomization is realized through the atomization device. The bottom of the heating kettle is connected with a liquid storage tank pipeline through a kettle bottom discharge port, so that the collection of kettle liquid is realized.
The insulating layer also can assist electromagnetic heating portion to keep the samming in to heating kettle, through setting up the protection part, fall on the high temperature resistant layer that the material fell to, the heat sensitivity material in the material can break away from the inside wall contact of direct and high temperature heating kettle like this, make the heat sensitivity material in the material protected like this, thereby can reduce the high temperature environment that the heating that is in electromagnetic heating portion package heating kettle department was located, can reduce length of time that stops, and then avoid the drawback of heat sensitivity material degeneration or coking, the rectification yield has been improved.
Cross the feed liquor pipe of outside pump connection circulating pipe group, go into the cavity inboard with coolant liquid or cold water pump, then coolant liquid or cold water come out from the drain pipe, can make cavity board department keep lower temperature like this, make the fluid of filler because of receiving the temperature difference influence, can liquefy with higher speed, collect in the filler bottom fast, thereby converge fast, the drop is collected in the backward flow room, and the backward flow liquid in the backward flow room can be carried to the heating kettle again by the feed pump, and realize the atomizing through the atomizer.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a cooling portion according to the present invention;
fig. 3 is another schematic view of the cooling part according to the present invention.
In the figure: the device comprises a rectifying tower 1, a heating kettle 2, a filler 3, an electromagnetic heating part 4, an atomizing device 5, a reflux chamber 6, a reflux chamber 7, a cooling part 8, a discharge hole 9, a branch pipe 10, a protection part 11, a blanking cavity 12, a heat insulation layer 13, a bent channel 14, a pit 15, a rough surface 16, a cavity plate 17, a water permeable hole 18, a pipe 19, a circulating pipe group 20, a high-temperature layer 21, a kettle bottom discharge hole 22, a tower jacking steam port 23, a tower top reflux port 24 and a tower top reflux port.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
The embodiment is as follows:
referring to fig. 1 to 3, the present invention provides a technical solution:
a rectifying tower for rapid temperature rise vaporization of materials comprises:
a rectifying column 1;
the heating kettle 2 is arranged at the bottom of the rectifying tower 1;
a packing 3 disposed in the rectifying column 1;
the electromagnetic heating part 4 is arranged on the outer wall of the heating kettle 2 and is used for heating the heating kettle 2;
the atomizing device 5 is positioned in the heating kettle 2 and is used for atomizing the material input into the heating kettle 2 and spraying the material to the inner wall of the heating kettle 2;
the bottom of the rectifying tower 1 and the top of the heating kettle 2 are sealed;
a reflux chamber 7 is arranged between the filler 3 and the bottom of the rectifying tower 1;
a cooling part 8 which is positioned in the reflux chamber 7, is arranged at the bottom end of the filler 3 and is used for accelerating the reflux liquid in the filler 3 to be left in the reflux chamber 7;
one end of the pipe body 6 is penetrated into the heating kettle 2 from the upper part of the kettle, and the other end is penetrated into the rectifying tower 1 from the side wall of the rectifying tower;
the protection part 11 is arranged at the bottom of the heating kettle 2 and below the atomizing device 5, and is used for receiving or containing the material falling from the inner wall of the heating kettle 2.
Specifically, the protection portion 11 includes a high temperature resistant layer 21, the high temperature resistant layer 21 is provided with a plurality of curved channels 14 from top to bottom, and a concave pit 15 and a rough surface 16 are arranged between two adjacent curved channels 14. A heat insulation layer 13 is arranged between the protective part 11 and the kettle bottom of the heating kettle 2, a blanking cavity 12 is arranged between the bottom of the protective part 11 and the heating kettle 2, and a kettle bottom discharge port 22 is formed by penetrating the bottom of the blanking cavity 12 into the blanking cavity 12.
In the present invention, as shown in fig. 1, when the rectifying tower is operated, the electromagnetic heating unit 4 is heated to uniformly raise the temperature of the side wall of the heating kettle 2 to a desired temperature. The spray opening of the atomization device 5 sprays atomized materials to the inner side wall of the heating kettle 2. Because the injection pressure of the material after coming out of the injection orifice can be gradually reduced, no matter the position of the injection orifice of the atomizing device 5 is close to one part of the inner side wall or is equidistant from the inner side wall, the contact time of one part of the material and the inner side wall of the heating kettle 2 is short, and the material falls on the inner wall of the kettle bottom of the heating kettle 2. Through setting up protection part 11, the material that falls on the resistant high temperature layer 21, and resistant high temperature layer 21 adopts high temperature resistant fibre, it has high temperature resistant (below 400 ℃ long-time work, highest 560 ℃), acid and alkali resistance, specifically like poly-p-phenylene terephthamide fibre etc., the heat sensitive material in the material can break away from direct and the contact of the inside wall of high temperature heating cauldron 2 like this, make the heat sensitive material in the material protected like this, thereby can reduce the high temperature environment that the heating that is in electromagnetic heating portion 4 parcel heating cauldron 2 department is located, can reduce and stay for a long time, and then avoid the drawback of heat sensitive material degeneration or coking, the rectification yield has been improved.
In the invention, the bent channel 14 and the concave pit 15 are arranged, wherein the bent channel 14 is used for containing materials with smaller blanking size or fluid with smaller viscosity, and the bent channel 14 is bent to be wave-shaped, so that the containing capacity of the channel can be increased after the blanking cavity 12 is filled with blanking (kettle liquid). The wells 15 are intended to contain large sized or viscous fluids or still liquid that tends to solidify. The rough surface 16 is arranged, so that materials on the surface of the protection part 11 can be stable, the stable materials are prevented from being displaced to the inner side wall of the heating kettle 2, the high temperature of the inner side wall of the heating kettle 2 is prevented from generating denaturation or coking on the heat-sensitive materials on or contained in the protection part 11 in order to improve the protection capability of the high temperature resistant layer 21 on the heat-sensitive materials, and the heat-sensitive materials are prevented from being heated by the high temperature of the inner side wall of the heating kettle 2.
Specifically, one end of the pipe body 6 is connected with a branch pipe 10, and the end of the branch pipe 10 extends to the bottom end of the packing 3. The bottom of the return chamber 7 is provided with a heat insulation layer 13. In the invention, the bottom of the rectifying tower 1 is not communicated with the top of the heating kettle 2, and the bottom of the rectifying tower and the top of the heating kettle 2 are communicated through the pipe body 6, so that the influence of high temperature in the heating kettle 2 on reflux flowing down from a filler can be avoided, and the reflux can be collected in the reflux chamber 7. Meanwhile, the heat insulation layer 13 is arranged at the bottom in the rectifying tower 1, so that the influence of higher temperature in the heating kettle on the bottom of the rectifying tower body is small, and the reflux liquid collection efficiency is improved.
Specifically, the cooling portion 8 includes a cavity plate 17, a plurality of water permeable holes 18 are opened on the cavity plate 17, and a circulating pipe group 20 communicated with a cavity of the cavity plate 17 is disposed on a side surface of the cavity plate 17. The area of the upper end surface of the cavity plate 17 is smaller than that of the bottom end of the filler 3. The circulating pipe group 20 includes 2 pipes, an inlet pipe and an outlet pipe. In the present invention, as shown in fig. 2, the liquid inlet pipe of the circulating pipe set 20 is connected to an external pump, the cooling liquid or cold water is pumped into the cavity plate 17, and then the cooling liquid or cold water is discharged from the liquid outlet pipe, so that the cavity plate 17 can be kept at a lower temperature, and the fluid of the filler 3 can be liquefied at an accelerated speed due to the influence of the temperature difference, and is collected at the bottom of the filler 3, and then flows together quickly and is drained into the backflow chamber 7 to be collected. In the present invention, as shown in fig. 3, the cooling part 8 includes a serpentine tube 19, and a circulation tube group 20 is connected to both ends of the tube 19. The installation area can be saved with respect to the cavity plate 17. The backflow chamber 7 is also provided with a discharge hole 9, when backflow liquid in the backflow chamber 7 is full, the backflow liquid is conveyed into the heating kettle 2 again through the discharge hole 9 and atomized, in the invention, it is required to be noted that the water permeable holes 18 of the cavity plate 17 are used for enabling the backflow liquid to fall into the backflow chamber 7, and when the backflow liquid passes through the water permeable holes 18, the backflow liquid cannot be communicated with the cavity plate 17 through the water permeable holes 18. The cavity plate 17, the serpentine tube 19, and the circulating tube group 20 may be made of a high-temperature-resistant and corrosion-resistant metal material, or may be made of the same material as that of the heating kettle 2.
When the rectifying tower works, a tower top condenser, a feed pump and a liquid storage tank need to be connected, and the temperature can be set according to materials needing to be vaporized, and the method comprises the following steps:
the top of the rectifying tower 1 is connected with a gas inlet pipe pipeline of the tower top condenser through a tower jacking gas port 23, a liquid outlet pipe of the tower top condenser is divided into two paths, one path is connected with a tower top reflux port 24 pipeline of the rectifying tower 1, and the other path is connected with a liquid storage tank pipeline, so that the collection of a rectified product is realized. The feed pump sends the material into heating kettle 2 to realize the atomization through atomizing device 5. The bottom of the heating kettle 2 is connected with a liquid storage tank pipeline through a kettle bottom discharge port 22, so that the collection of kettle liquid is realized.
Insulating layer 13 also can assist electromagnetic heating portion 4 to keep the samming in heating cauldron 2, through setting up protection part 11, fall on the high temperature resistant layer 21 that the material fell, the heat sensitivity material in the material can break away from the direct inside wall contact with heating cauldron 2 of high temperature like this, make the heat sensitivity material in the material protected like this, thereby can reduce the high temperature environment that the heating that is in electromagnetic heating portion 4 parcel heating cauldron 2 department was located, can reduce to dwell for a long time, and then avoid the drawback of heat sensitivity material degeneration or coking, the rectification yield has been improved.
Cross the feed liquor pipe of outside pump connection circulating pipe group 20, in pumping into cavity board 17 with coolant liquid or cold water, then coolant liquid or cold water come out from the drain pipe, can make cavity board 17 department keep lower temperature like this, make the fluid of filler 3 because of receiving the temperature difference influence, can liquefy with higher speed, the quick collection is in filler 3 bottoms, thereby converge fast, drip to and be collected in the backward flow room 7, and the backward flow liquid in the backward flow room 7 can be carried to heating kettle 2 again by the charge pump, and realize the atomizing through atomizer 9.
The invention, the remaining parts not described, are the same as, or known or realizable by the prior art and will not be described in detail here.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A rectifying tower for rapid heating and vaporization of materials is characterized by comprising:
a rectifying column (1);
the heating kettle (2) is arranged at the bottom of the rectifying tower (1);
a packing (3) disposed within the rectification column (1);
the electromagnetic heating part (4) is arranged on the outer wall of the heating kettle (2) and is used for heating the heating kettle (2);
the atomizing device (5) is positioned in the heating kettle (2) and is used for atomizing the material input into the heating kettle (2) and spraying the material to the inner wall of the heating kettle (2);
the bottom of the rectifying tower (1) and the top of the heating kettle (2) are sealed;
a reflux chamber (7) is arranged between the filler (3) and the bottom of the rectifying tower (1);
the cooling part (8) is positioned in the backflow chamber (7), is arranged at the bottom end of the filler (3), and is used for accelerating backflow liquid in the filler (3) to be reserved in the backflow chamber (7);
one end of the pipe body (6) is penetrated into the heating kettle (2) from the upper part of the kettle, and the other end is penetrated into the rectifying tower (1) from the side wall of the rectifying tower;
the protection part (11) is arranged at the kettle bottom of the heating kettle (2), is positioned below the atomizing device (5) and is used for receiving or accommodating materials falling from the inner wall of the heating kettle (2);
the protection part (11) comprises a high-temperature-resistant layer (21), a plurality of bent channels (14) are arranged from top to bottom on the high-temperature-resistant layer (21), and a concave pit (15) and a rough surface (16) are arranged between every two adjacent bent channels (14).
2. The rectifying tower for rapid temperature rise and vaporization of materials according to claim 1, wherein the cooling part (8) comprises a cavity plate (17), a plurality of water permeable holes (18) are opened on the cavity plate (17), and a circulating pipe group (20) communicated with the cavity of the cavity plate (17) is arranged on the side surface of the cavity plate (17).
3. The rectifying tower for the rapid temperature rise vaporization of materials as claimed in claim 1, characterized in that the area of the upper end surface of the cavity plate (17) is smaller than the area of the bottom end of the packing (3).
4. A rectifying tower for the rapid thermal evaporation of materials according to claim 1, characterized in that said cooling section (8) comprises a serpentine tube (19), the two ends of which (19) are connected with a set of circulating tubes (20).
5. The rectifying tower for rapid heating and vaporization of materials according to claim 1, characterized in that a branch pipe (10) is connected to one end of the pipe body (6), and the end of the branch pipe (10) extends to the bottom end of the packing (3).
6. The rectifying tower for rapid temperature rise and vaporization of materials according to claim 1, characterized in that a heat insulation layer (13) is arranged at the bottom of the reflux chamber (7), and a discharge hole (9) is further arranged on the reflux chamber (7).
7. The rectifying tower for rapid temperature rise and vaporization of materials according to claim 1, wherein a heat insulation layer (13) is arranged between the protection part (11) and the bottom of the heating kettle (2), a blanking cavity (12) is arranged between the bottom of the protection part (11) and the heating kettle (2), and a kettle bottom discharge hole (22) penetrates into the blanking cavity (12) from the bottom of the blanking cavity (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210449358.7A CN114733221B (en) | 2022-04-24 | 2022-04-24 | Rectifying tower for quickly heating and vaporizing materials |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210449358.7A CN114733221B (en) | 2022-04-24 | 2022-04-24 | Rectifying tower for quickly heating and vaporizing materials |
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| CN114733221A CN114733221A (en) | 2022-07-12 |
| CN114733221B true CN114733221B (en) | 2023-03-28 |
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| US7247765B2 (en) * | 2004-05-21 | 2007-07-24 | Exxonmobil Chemical Patents Inc. | Cracking hydrocarbon feedstock containing resid utilizing partial condensation of vapor phase from vapor/liquid separation to mitigate fouling in a flash/separation vessel |
| JP5038251B2 (en) * | 2008-07-30 | 2012-10-03 | 東邦チタニウム株式会社 | Titanium tetrachloride distillation purification apparatus, maintenance method of the apparatus, and purification method of titanium tetrachloride using the apparatus |
| CN201537399U (en) * | 2009-04-28 | 2010-08-04 | 北京恒聚化工集团有限责任公司 | Distillation separating tower of two-element mixed liquid substances |
| CN105797415B (en) * | 2014-12-31 | 2018-03-30 | 亚申科技研发中心（上海）有限公司 | A kind of material boils module and applies its distillation system again |
| CN204848760U (en) * | 2015-07-21 | 2015-12-09 | 黄河三角洲京博化工研究院有限公司 | Reduce burnt stirring steam loop of coking fractionating tower bear building -up |
| CN205252570U (en) * | 2015-12-10 | 2016-05-25 | 巴州澳华油脂有限公司 | Biodiesel distillation column |
| US10751639B2 (en) * | 2018-06-26 | 2020-08-25 | Uop Llc | Process and apparatus for hydrocracking with integrated dual stripping columns |
| CN109011676B (en) * | 2018-08-21 | 2021-06-04 | 浙江工业大学 | Rectifying tower capable of realizing rapid temperature rise and vaporization of materials |
| CN211863908U (en) * | 2020-03-18 | 2020-11-06 | 南通利奥化工科技有限公司 | Gas-liquid distributor device of rectifying tower |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203096011U (en) * | 2013-03-14 | 2013-07-31 | 济钢集团有限公司 | Benzene and water separation device in debenzolized rich oil |
| CN111621320A (en) * | 2020-05-02 | 2020-09-04 | 山东省科学院能源研究所 | Pyrolysis product grading separation method and multi-inner-tower rectifying device |
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Address after: 226000 Yangkou Chemical Industrial Park, Rudong County, Nantong City, Jiangsu Province Applicant after: Jiangsu Jiasheng Chemical Technology Co.,Ltd. Address before: 226000 Yangkou Chemical Industrial Park, Rudong County, Nantong City, Jiangsu Province Applicant before: NANTONG LEO CHEMICAL TECHNOLOGY Co.,Ltd. |