CN108675265B - Post-treatment device for hydrogen peroxide production process by anthraquinone process - Google Patents
Post-treatment device for hydrogen peroxide production process by anthraquinone process Download PDFInfo
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- CN108675265B CN108675265B CN201810738748.XA CN201810738748A CN108675265B CN 108675265 B CN108675265 B CN 108675265B CN 201810738748 A CN201810738748 A CN 201810738748A CN 108675265 B CN108675265 B CN 108675265B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
- C01B15/01—Hydrogen peroxide
- C01B15/022—Preparation from organic compounds
- C01B15/023—Preparation from organic compounds by the alkyl-anthraquinone process
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Abstract
The invention relates to a post-treatment device for a hydrogen peroxide production process by an anthraquinone method, and belongs to the technical field of chemical equipment. The post-treatment device comprises an alkali tower, a clay bed and a tower cap assembly; the tower cap assembly comprises an inner guide cylinder, a gas-liquid separation cylinder sleeved outside the inner guide cylinder, an outer guide cylinder, a sedimentation cylinder sleeved outside the outer guide cylinder and a cap shell with an exhaust port at the top; a structured packing layer with the upper surface lower than the inner guide cylinder is filled between the gas-liquid separation cylinder and the inner guide cylinder; a regular packing layer with the lower surface higher than the lower end hole of the outer guide cylinder is filled between the sedimentation cylinder and the inner guide cylinder; the sedimentation cylinder and the cap shell enclose a liquid collecting chamber which is arranged around the sedimentation cylinder, and a liquid collecting chamber outlet which is connected with the clay bed through a pipeline is arranged on the cap shell. Through setting up tower cap subassembly to carry out gas-liquid separation treatment and oil water separation treatment to the working solution after alkali tower drying treatment, when in order to reduce the treatment facility quantity, simplify manual operation, but wide application in the production field of hydrogen peroxide solution.
Description
Technical Field
The invention relates to the technical field of chemical equipment, in particular to a post-treatment device for a process for producing hydrogen peroxide by an anthraquinone method.
Background
Currently, the anthraquinone process is the most dominant hydrogen peroxide production process. In the production process, the working solution is subjected to hydrogenation treatment in a hydrogenation step to obtain a hydrogenated solution, the hydrogenated solution is subjected to oxidation treatment in an oxidation step to obtain an oxidized solution containing hydrogen peroxide, and the oxidized solution is extracted in an extraction step by using pure water to obtain an extract solution and the working solution containing a small amount of water and hydrogen peroxide. When the working fluid is recycled, the water in the working fluid needs to be removed so as to prevent explosion hazard. Currently, methods for removing water from a working fluid in industrial production include a vacuum dehydration method, an alkali dehydration method, and an oil-water separation method disclosed in patent document CN104370331 a.
For the alkali dehydration method, patent document with publication number CN204237558U discloses a post-treatment device for the production process of hydrogen peroxide by anthraquinone process, as shown in fig. 1, comprising an alkali tower 01, an alkali separator 02, an alkali settler 03, a clay bed 04, an alkali recovery tank 05 and an alkali evaporator 06, wherein the top of the alkali tower 01 is communicated with the alkali separator 02 through a pipeline, the alkali separator 02 is communicated with the alkali settler 03 through a pipeline, and the alkali settler 03 is communicated with the clay bed 04 through a pipeline. In the working process, (1) after the working solution flowing out of the top of the extraction tower is separated out of partial water possibly carried by the raffinate separator, the working solution enters the alkaline tower 01 from a material port at the bottom of the alkaline tower 01; (2) A concentrated potassium carbonate solution is filled in the alkali tower 01 and is used for removing residual moisture and neutralizing acids in the working solution and decomposing residual hydrogen peroxide; (3) The working solution flowing out from the top of the alkali tower 01 flows through the alkali separator 02 and the alkali settler 03 in sequence, and after the possibly entrained potassium carbonate solution is separated, the working solution enters the clay bed 04 for treatment, and the separated potassium carbonate solution is collected in the alkali recovery tank 05. The diluted potassium carbonate solution in the alkali tower 01 and the potassium carbonate solution collected in the alkali recovery tank 05 are concentrated by the alkali evaporator 06 and then enter the alkali tower 01 again for recycling.
However, after the hydrogen peroxide remained in the extracted working solution enters the alkali tower 01 along with the working solution, a severe decomposition reaction can occur in the alkali tower 01, a large amount of gas and heat are released, if the gas is discharged in a short time, the alkali tower 01 is overpressurized, the gas also bubbles in the alkali tower 01 to generate a phenomenon of water-in-oil, the water-in-oil refers to that the light phase working solution wraps the potassium carbonate to form bubbles, the working solution and the potassium carbonate solution are not easy to separate, a large amount of potassium carbonate solution is carried out of the alkali tower 01, the concentration of the potassium carbonate solution in the alkali tower 01 is reduced, the service cycle of the concentrated potassium carbonate is shortened, the consumption of the potassium carbonate is increased, and the loads of the alkali separator 02, the alkali settler 03, the alkali evaporator 06 and manual operation are aggravated.
Disclosure of Invention
The invention aims to provide a post-treatment device for the process of producing hydrogen peroxide by an anthraquinone method, so as to reduce the number of equipment and simplify the operation.
In order to achieve the above purpose, the post-treatment device provided by the invention comprises an alkali tower and a clay bed, wherein the alkali tower comprises a tower shell, the top of the tower shell is provided with a working solution outlet, and a tower cap assembly is arranged on the tower shell; the tower cap assembly comprises an inner guide cylinder, a gas-liquid separation cylinder sleeved outside the inner guide cylinder, an outer guide cylinder, a sedimentation cylinder sleeved outside the outer guide cylinder and a cap shell with an exhaust port at the top; the gas-liquid separation cylinder is positioned above the outer guide cylinder; the lower port of the inner guide cylinder is fixedly arranged on the tower shell in a butt joint communication with the working fluid outlet; the lower port of the gas-liquid separation cylinder is in butt joint communication with the upper port of the outer guide cylinder, the upper end is an open end with the end face higher than that of the inner guide cylinder, and a packing layer with the upper surface lower than that of the upper cylinder port of the inner guide cylinder is filled between the gas-liquid separation cylinder and the inner guide cylinder; the lower end part of the outer guide cylinder is provided with a liquid outlet hole communicated with the inner cavity of the sedimentation cylinder; a packing layer with the lower surface higher than the liquid outlet hole is filled between the sedimentation cylinder and the outer guide cylinder, and a part of inner cavity below the liquid outlet hole forms a potassium carbonate solution sedimentation chamber; the sedimentation cylinder and the cap shell form a liquid collecting chamber which is arranged around the sedimentation cylinder, and the upper port of the sedimentation cylinder is lower than the open end; the cap shell is provided with a liquid collecting chamber outlet connected with the clay bed through a pipeline.
In the working process, after the working solution is dried in the alkali tower, the working solution flows through a working solution outlet and floats upwards along the inner guide cylinder, part of gas is directly discharged from the gas outlet, the working solution and the entrained potassium carbonate solution are dispersed and dropped along the edge of the upper cylinder opening of the inner guide cylinder under the action of gravity and pass through a packing layer, and the possible oil water is punctured, so that the gas is discharged from the gas outlet under the action of buoyancy; the working solution and the potassium carbonate solution after gas-liquid separation are continuously descended under the action of gravity, flow through the sinking diversion channel and flow into the oil-water separation chamber from the liquid outlet; because the specific gravity of the potassium carbonate is larger, the potassium carbonate is settled to the bottom of the separation chamber and is gathered in the potassium carbonate solution settling chamber, the working solution is lighter, floats upwards and enters the effusion chamber to be collected, and finally flows out to the clay bed from the material outlet. The first packing layer is arranged to puncture the water in oil, and the second packing layer is arranged to regulate the oil-water separation process, so that the oil-water separation is more thorough; thereby realizing the gas-liquid separation of water-in-oil and the separation of potassium carbonate solution and working solution, reducing the number of equipment without an alkali separator and an alkali settler, and simplifying the manual operation.
The upper end of the sedimentation cylinder is sleeved outside the lower end of the gas-liquid separation cylinder, and the upper end and the lower end are radially arranged at intervals to form an overflow port.
Another specific scheme is that the bottom of the potassium carbonate solution sedimentation chamber is connected with an alkali discharging pipeline for conveying the settled potassium carbonate solution to a potassium carbonate solution storage chamber positioned at the bottom of the alkali tower.
The preferable scheme is that a plurality of liquid outlet holes are uniformly distributed along the circumferential direction of the outer guide cylinder.
More preferably, the top of the tower shell is a frustum-shaped shell, and a small diameter port of the frustum-shaped shell forms a working fluid outlet; the inner diameter of the outer guide cylinder is fixedly connected with the small-diameter port in an equal-diameter manner with the working fluid outlet, and the lower end of the outer guide cylinder is fixedly connected with the frustum-shaped shell.
The other preferable scheme is that the cap shell comprises a base cylinder body with the outer diameter larger than that of the tower shell and a sealing head detachably arranged on the upper port of the base cylinder body; the lower end part of the base cylinder body is sleeved outside the upper end part of the tower shell, and the lower port is fixedly connected with the tower shell in a watertight manner.
More preferably, the vent is located in the central region of the closure head.
Another more preferable scheme is that an inner cylinder body is fixedly arranged on the inner wall of the base cylinder body, and a liquid collecting chamber is formed between the inner cylinder body and the base cylinder body in a surrounding manner; the base cylinder is connected with the inner cylinder to form a sedimentation cylinder.
The further scheme is that the upper end face of the inner cylinder body is a sawtooth overflow surface, and tooth grooves in the sawtooth overflow surface are uniformly distributed along the circumferential direction of the inner cylinder body.
The gas-liquid separation cylinder comprises a large-diameter cylinder part for filling a packing layer and an inverted cone-shaped cylinder part fixedly arranged on the lower end part of the large-diameter cylinder part in a grounding way, and an upper cylinder opening of the outer guide cylinder is fixedly connected with a small-diameter port part of the inverted cone-shaped cylinder part in the grounding way; the packing layer is a structured packing layer.
Drawings
FIG. 1 is a schematic diagram of a conventional aftertreatment device;
FIG. 2 is a schematic diagram of an embodiment of the present invention;
FIG. 3 is a schematic view of a base tower and cap assembly according to an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of a part of the tower cap assembly and the alkaline tower according to the embodiment of the invention;
fig. 5 is a partial enlarged view of fig. 3 a.
Detailed Description
The invention is further described below with reference to examples and figures thereof.
Examples
Referring to fig. 2 to 5, the post-treatment apparatus 1 of the present invention comprises a base tower 11, a tower cap assembly 12 mounted on the top of the base tower, a clay bed 13 in communication with the material outlet of the tower cap assembly 12 through a pipe, and a potassium carbonate solution storage chamber in communication with the base tower 11 through a pipe.
The caustic tower 11 comprises a tower shell 110, and a material inlet 113 for communicating with a material outlet of the raffinate separator through a pipeline is arranged on the tower shell 110 so as to receive working liquid to be treated. The top of the tower shell 110 is a frustum-shaped shell 111, and a small diameter port of the frustum-shaped shell 111 forms a working solution outlet 112, namely the working solution after the drying treatment of the potassium carbonate solution is discharged from the working solution outlet 112 to the alkali tower 11.
The tower cap assembly 12 is mounted on top of the tower shell 110 and includes an inner draft tube 2, a gas-liquid separation tube 3, an outer draft tube 4, a settling tube 5, and a cap shell 6.
The lower port of the inner guide cylinder 2 and the working fluid outlet 112 are fixedly connected in a butt joint manner on the small-diameter port part of the frustum-shaped shell part 111, the inner cylinder hole of the inner guide cylinder forms an ascending guide channel, and the outer guide cylinder 2 has a straight cylinder structure with the inner diameter equal to the working fluid outlet 112.
The outer guide cylinder 4 is of a straight cylinder structure sleeved outside the inner guide cylinder 2, and a radial gap formed by the interval between the outer guide cylinder and the inner guide cylinder forms a sinking guide channel; the lower port of the outer guide cylinder 4 is fixedly connected with the frustum-shaped shell 111, and the cylinder wall at the lower end is provided with a circle of liquid outlet holes 40 which are arranged around the lower end, in this embodiment, the liquid outlet holes 40 form evenly arranged circumferentially around the outer guide cylinder 4, so that the flow in the sinking guide channel can be approximately evenly distributed around the lower end.
The gas-liquid separation cylinder 3 comprises a large-diameter cylinder part 30 for filling the structured packing layer 32 and an inverted cone cylinder part 31 fixedly arranged on the lower end part of the large-diameter cylinder part 30 in a grounding way, and an upper cylinder opening of the outer guide cylinder 4 is fixedly connected with a small-diameter port part of the inverted cone cylinder part 31 in a grounding way so that the gas-liquid separation cylinder 3 is positioned above the outer guide cylinder 4. The inverted cone 31 serves to collect the liquid after treatment with the layer of structured packing 32 so that the fluid entering the submerged diversion channel is substantially evenly distributed circumferentially.
The cap shell 6 comprises a base cylinder 60 with an outer diameter larger than that of the tower shell 110 and a sealing head 61 detachably arranged on the upper port of the base cylinder 60, wherein the sealing head 61 is used for sealing the upper port of the base cylinder 60. In this embodiment, the base cylinder 60 has a straight cylinder structure with a reduced structure at the lower end, and is sleeved outside the upper end of the tower shell 110, and the lower reduced end is fixedly connected with the tower shell 110 in a watertight manner. An exhaust port 62 is arranged in the top central area of the seal head 61, namely, the top of the cap shell 6 is provided with an exhaust port, a material outlet 63 is arranged on the base cylinder 60, and the material outlet 63 forms a material outlet which is communicated with the clay bed 13 through a pipeline in the tower cap assembly 12.
An inner cylinder 51 is fixedly arranged on the inner wall of the upper end part of the base cylinder 60, the lower end part of the inner cylinder 51 is a folded edge part which is bent outwards and extends, and the folded edge part is fixedly connected with the inner wall surface of the base cylinder 60 in a watertight manner, so that a liquid collecting chamber 50 is enclosed between the inner cylinder 51 and the base cylinder 60.
The cylinder body 60 below the inner cylinder body 51 and the inner cylinder body 51 form a connection to form a sedimentation cylinder 5 in the embodiment, namely, the sedimentation cylinder 5 is sleeved outside the outer guide cylinder 4 and the gas-liquid separation cylinder 3, a radial gap between the two forms an oil-water separation chamber, the sedimentation cylinder 5 and the cap shell 6 form a liquid collecting chamber 50 which is arranged around the sedimentation cylinder 5, and in the embodiment, the liquid collecting chamber 50 is circumferentially arranged around the inner cylinder body 51. A structured packing layer 52 with the lower surface higher than the liquid outlet hole 40 is filled between the sedimentation cylinder 5 and the inner guide cylinder 4, and a part of the inner chamber of the oil-water separation chamber below the liquid outlet hole 40 forms a potassium carbonate solution sedimentation chamber 53.
In this embodiment, the inner port of the material outlet 63 communicates with the plenum 50, i.e., it forms the plenum outlet, to communicate the clay bed 13 with the plenum 50 via a conduit.
The upper end of the gas-liquid separation cylinder 3 is an open end with the end surface higher than the inner guide cylinder 2, so that working fluid floating up from the inner guide cylinder 2 can be received. The upper end of the sedimentation cylinder 5 is sleeved outside the lower end of the gas-liquid separation cylinder 3, so that the upper port of the sedimentation cylinder 5 is lower than the end face of the open end of the gas-liquid separation cylinder 3 to form an overflow port of the oil-water separation chamber; in the present embodiment, the upper end surface of the inner cylinder 51 is provided as a serration overflow surface 510, and tooth grooves in the serration overflow surface 510 are uniformly arranged along the circumferential direction of the inner cylinder 51.
A caustic soda removal pipeline 530 is connected to the bottom of the potassium carbonate solution settling chamber 53, and is used for conveying the settled and collected potassium carbonate solution to a potassium carbonate solution storage chamber at the bottom of the caustic tower 11, so that the diluted potassium carbonate solution is conveyed to the caustic evaporator 14 through a pipeline connected with the material outlet 114 for concentration by distillation, and then recycled and reused in the caustic tower 11.
In the working process, (1) the working solution of fire treated by the extraction separator enters the alkaline tower 11 through the material inlet 113, and the working solution is dried; the working solution after the drying treatment floats upwards along the inner guide cylinder 2 through the working solution outlet 112, part of gas directly enters the cavity of the seal head 61 and is discharged through the air outlet 62, the working solution and the possibly entrained potassium carbonate solution are dispersed and fall under the action of gravity, and the possibly existing 'water-in-oil' is punctured through the structured packing layer 23, so that the gas rises into the cavity of the seal head 61 due to the buoyancy effect and is discharged through the air outlet 62; (3) The working solution and the potassium carbonate solution after gas-liquid separation are continuously descended under the action of gravity, flow through the sinking diversion channel and are uniformly distributed into the oil-water separation chamber from the liquid outlet holes 40; (4) Because the potassium carbonate has a higher specific gravity, the potassium carbonate settles at the bottom and gathers in the potassium carbonate solution settling chamber 53, the working solution is lighter, floats up into the effusion chamber 50 to be collected, and finally flows out of the clay bed 14 through the material outlet. And the potassium carbonate solution settled in the potassium carbonate solution settling chamber 53 is returned to the potassium carbonate storage area at the bottom of the alkali column through an automatic alkali discharging line. The structured packing layer 32 is arranged to puncture the water in oil, and the structured packing layer 52 is arranged to regulate the oil-water separation process so as to enable the oil-water separation to be more thorough, namely the packing layer 32 is used to puncture the water in oil so as to promote gas-liquid separation; thereby realizing the gas-liquid separation of water-in-oil and the separation of potassium carbonate solution and working solution, reducing the number of equipment without an alkali separator and an alkali settler, and simplifying the manual operation.
In the above embodiments, the watertight fixing connection between the cylinders may be achieved by using a welding process.
The main conception of the invention is that the tower cap component for carrying out gas-liquid separation treatment on 'water-in-oil' in the working solution after the drying treatment of the alkali tower and carrying out separation treatment on the potassium carbonate solution in the working solution is arranged on the top of the alkali tower, so that an alkali separator and an alkali settler are omitted, the number of equipment is reduced, and the complexity of manual operation can be simplified. According to the conception, the structures of the alkali tower, the clay bed and the alkali evaporator can be designed by referring to the structures of the existing products; the packing used in the regular packing layer can be conventional packing without special requirements; in addition, the structure of the sedimentation cylinder and the cap shell can be manufactured by adopting a two-layer mutually sleeved cylinder structure.
Claims (12)
1. The post-treatment device for the process of producing hydrogen peroxide by the anthraquinone method comprises an alkali tower and a clay bed, wherein the alkali tower comprises a tower shell with a working solution outlet at the top, and the post-treatment device is characterized in that:
a tower cap assembly is arranged on the tower shell; the tower cap assembly comprises an inner guide cylinder, a gas-liquid separation cylinder and an outer guide cylinder sleeved outside the inner guide cylinder, a sedimentation cylinder sleeved outside the outer guide cylinder, and a cap shell with an exhaust port at the top; the gas-liquid separation cylinder is positioned above the outer guide cylinder;
the lower port of the inner guide cylinder is fixedly arranged on the tower shell in a butt joint communication with the working fluid outlet; the lower port of the gas-liquid separation cylinder is in butt joint communication with the upper port of the outer guide cylinder, the upper end is an open end with the end face higher than the inner guide cylinder, and a first packing layer with the upper surface lower than the upper cylinder opening of the inner guide cylinder is filled between the gas-liquid separation cylinder and the inner guide cylinder;
the lower end part of the outer guide cylinder is provided with a liquid outlet hole communicated with the inner cavity of the sedimentation cylinder; a second packing layer with the lower surface higher than the liquid outlet hole is filled between the sedimentation cylinder and the outer guide cylinder, and a part of inner chamber below the liquid outlet hole forms a potassium carbonate solution sedimentation chamber; the sedimentation cylinder and the cap shell form a liquid collecting chamber which is arranged around the sedimentation cylinder, and the upper port of the sedimentation cylinder is lower than the open end; the cap shell is provided with a liquid collecting chamber outlet connected with the clay bed through a pipeline, and the second packing layer is lower than the first packing layer.
2. The aftertreatment device of claim 1, wherein:
the bottom of the potassium carbonate solution sedimentation chamber is connected with an alkali discharge pipeline for conveying the settled potassium carbonate solution to a potassium carbonate solution storage chamber positioned at the bottom of the alkali tower.
3. The aftertreatment device of claim 1, wherein:
the upper end part of the sedimentation cylinder is sleeved outside the lower end part of the gas-liquid separation cylinder, and the upper end part and the lower end part are radially arranged at intervals to form an overflow port.
4. A post-processing apparatus according to claim 3, wherein:
the bottom of the potassium carbonate solution sedimentation chamber is connected with an alkali discharge pipeline for conveying the settled potassium carbonate solution to a potassium carbonate solution storage chamber positioned at the bottom of the alkali tower.
5. The aftertreatment device of any one of claims 1-4, wherein:
the liquid outlet holes are uniformly distributed along the circumferential direction of the outer guide cylinder.
6. The aftertreatment device of claim 5, wherein:
the cap shell comprises a base cylinder body with the outer diameter larger than that of the tower shell and a sealing head detachably arranged on the upper port of the base cylinder body;
the lower end part of the base cylinder body is sleeved outside the upper end part of the tower shell, and the lower port is fixedly connected with the tower shell in a watertight manner.
7. The aftertreatment device of claim 5, wherein:
the top of the tower shell is a frustum-shaped shell, and a small diameter port of the frustum-shaped shell forms the working fluid outlet; the inner diameter of the outer guide cylinder and the working fluid outlet are fixedly connected to the small-diameter port in a constant-diameter manner, and the lower end of the outer guide cylinder is fixedly connected to the frustum-shaped shell.
8. The aftertreatment device of any one of claims 1-4, wherein:
the cap shell comprises a base cylinder body with the outer diameter larger than that of the tower shell and a sealing head detachably arranged on the upper port of the base cylinder body;
the lower end part of the base cylinder body is sleeved outside the upper end part of the tower shell, and the lower port is fixedly connected with the tower shell in a watertight manner.
9. The aftertreatment device of claim 8, wherein:
the exhaust port is located on a central region of the head.
10. The aftertreatment device of claim 8, wherein:
an inner cylinder body is fixedly arranged on the inner wall of the base cylinder body, and the liquid collecting chamber is enclosed between the inner cylinder body and the base cylinder body;
the base cylinder body is positioned below the inner cylinder body, and the cylinder body is connected with the inner cylinder body to form the sedimentation cylinder.
11. The aftertreatment device of claim 10, wherein:
the upper end face of the inner cylinder body is a sawtooth-shaped overflow surface, and tooth grooves in the sawtooth-shaped overflow surface are uniformly distributed along the circumferential direction of the inner cylinder body.
12. The aftertreatment device of any one of claims 1-4, wherein:
the gas-liquid separation cylinder comprises a large-diameter cylinder part for filling the first packing layer and an inverted cone-shaped cylinder part fixedly arranged on the lower end part of the large-diameter cylinder part in a grounding way, and an upper cylinder opening of the outer guide cylinder is fixedly connected with a small-diameter port part of the inverted cone-shaped cylinder part in a grounding way;
the first packing layer and the second packing layer are structured packing layers.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018107316319 | 2018-07-05 | ||
| CN2018210638760 | 2018-07-05 | ||
| CN201821063876 | 2018-07-05 | ||
| CN201810731631 | 2018-07-05 |
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| CN108675265A CN108675265A (en) | 2018-10-19 |
| CN108675265B true CN108675265B (en) | 2023-09-15 |
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| CN201810738748.XA Active CN108675265B (en) | 2018-07-05 | 2018-07-06 | Post-treatment device for hydrogen peroxide production process by anthraquinone process |
| CN201821076492.2U Active CN208586059U (en) | 2018-07-05 | 2018-07-06 | A kind of after-treatment device of process for prepairng hydrogen peroxide by anthraquinone technique |
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| CN201821076492.2U Active CN208586059U (en) | 2018-07-05 | 2018-07-06 | A kind of after-treatment device of process for prepairng hydrogen peroxide by anthraquinone technique |
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| CN108675265B (en) * | 2018-07-05 | 2023-09-15 | 浙江工程设计有限公司 | Post-treatment device for hydrogen peroxide production process by anthraquinone process |
| CN114180773A (en) * | 2021-12-07 | 2022-03-15 | 黎明化工研究设计院有限责任公司 | Novel post-treatment process of working solution for producing hydrogen peroxide by anthraquinone method |
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| CN108675265A (en) | 2018-10-19 |
| CN208586059U (en) | 2019-03-08 |
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