CN213131979U - Rectification system is used in organosilicon production - Google Patents
Rectification system is used in organosilicon production Download PDFInfo
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- CN213131979U CN213131979U CN202021593274.3U CN202021593274U CN213131979U CN 213131979 U CN213131979 U CN 213131979U CN 202021593274 U CN202021593274 U CN 202021593274U CN 213131979 U CN213131979 U CN 213131979U
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Abstract
The utility model provides a rectification system for organic silicon production, which comprises a storage tank, a first rectification tower, a second rectification tower, a third rectification tower and a collecting tank; the material storage tank is communicated with a feed inlet of the first rectifying tower through a first pipeline; and the tower top gas phase discharge port of the first rectifying tower is sequentially communicated with the feed inlets of the first condenser, the first gas-liquid separator, the first vacuum pump and the second rectifying tower through a second pipeline. A rectification system is used in organosilicon production, set up first condenser and second condenser at the gaseous phase discharge port of first rectifying column and second rectifying column respectively, set up first vacuum pump and second vacuum pump again and be connected with it, can carry out the rectification with leading-in next rectifying column of product after the condensation, set up vapour and liquid separator in the one end of condenser, and set up the filter box at vapour and liquid separator's gas discharge port, can avoid the combustion gas air pollution, the purpose convenient to use and energy-concerving and environment-protective has been reached.
Description
Technical Field
The utility model belongs to the technical field of the organosilicon rectification, especially, relate to a rectification system is used in organosilicon production.
Background
Organosilicon, i.e., organosilicon compounds, are compounds which contain Si-C bonds and have at least one organic radical directly bonded to the silicon atom, and compounds in which an organic radical is bonded to the silicon atom via oxygen, sulfur, nitrogen, or the like are also conventionally used as organosilicon compounds. Among them, the polysiloxane having a siloxane bond (-Si-O-Si-) as a skeleton is the most abundant, most studied and most widely used class of organosilicon compounds, and accounts for about 90% or more of the total amount. The rectification is needed in the production process, but the existing rectification system has the following defects:
most of the existing rectifying systems for producing organic silicon have gas exhausted in the rectifying process to pollute air, and are not energy-saving and environment-friendly.
Disclosure of Invention
In view of this, the utility model aims at providing an organosilicon is rectification system for production to overcome prior art's defect, the rectification is effectual, simultaneously energy-concerving and environment-protective.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a rectification system for organic silicon production comprises a storage tank, a first rectification tower, a second rectification tower, a third rectification tower and a collection tank;
the material storage tank is communicated with a feed inlet of the first rectifying tower through a first pipeline;
the top gas phase discharge port of the first rectifying tower is sequentially communicated with the first condenser, the first gas-liquid separator, the first vacuum pump and the feed inlet of the second rectifying tower through a second pipeline; a tower bottom liquid phase discharge port of the first rectifying tower is sequentially communicated with a fourth vacuum pump, a first reflux tank and a feed inlet of the first rectifying tower through a fifth pipeline;
the tower top gas phase discharge port of the second rectifying tower is sequentially communicated with a second condenser, a second gas-liquid separator, a second vacuum pump and a feed inlet of a third rectifying tower through a third pipeline; a tower bottom liquid phase discharge port of the second rectifying tower is sequentially communicated with a fifth vacuum pump, a second reflux tank and a feed inlet of the second rectifying tower through a sixth pipeline;
the top gas phase discharge port of the third rectifying tower is sequentially communicated with the feed inlets of a third condenser, a third gas-liquid separator, a third vacuum pump and a collecting tank through a fourth pipeline; a tower bottom liquid phase discharge port of the third rectifying tower is sequentially communicated with a sixth vacuum pump, a third reflux tank and a feed inlet of the third rectifying tower through a seventh pipeline;
the gas phase outlets of the first gas-liquid separator, the second gas-liquid separator and the third gas-liquid separator are communicated with a filter box.
Further, the filter box is an active carbon filter box.
Further, an outlet of the first condenser is communicated with a liquid inlet of the first gas-liquid separator, and a liquid outlet of the first gas-liquid separator is communicated with the first vacuum pump.
Furthermore, an outlet of the second condenser is communicated with a liquid inlet of the second gas-liquid separator, and a liquid outlet of the second gas-liquid separator is communicated with the second vacuum pump.
Further, an outlet of the third condenser is communicated with a liquid inlet of the third gas-liquid separator, and a liquid outlet of the third gas-liquid separator is communicated with the third vacuum pump.
Further, the condenser is a shell-and-tube heat exchanger.
Furthermore, the first rectifying tower, the second rectifying tower and the third rectifying tower are all packing type rectifying towers, and the second rectifying tower and the third rectifying tower are all identical to the first rectifying tower in structure.
Further, first rectifying column includes rectifying column main part, the induction pipe, the gaseous phase discharge pipe, the liquid phase discharge pipe, metal packing, limiting plate and filter screen, the top fixedly connected with induction pipe of rectifying column main part surface, the top fixedly connected with gaseous phase discharge pipe of rectifying column main part, the bottom fixedly connected with liquid phase discharge pipe of rectifying column main part, the inner wall fixedly connected with metal packing and the limiting plate of rectifying column main part, the inside swing joint of limiting plate has the filter screen, the quantity of filter screen is two.
Furthermore, the first pipeline, the second pipeline and the third pipeline are all three-way pipelines; a first inlet of the first pipeline is communicated with an outlet of the material storage tank, a second inlet of the first pipeline is communicated with an outlet of the fifth pipeline, and the outlet of the first pipeline is communicated with a feed inlet of the first rectifying tower; a first inlet of the second pipeline is communicated with a gas phase discharge port at the top of the first rectifying tower, a second inlet of the second pipeline is communicated with an outlet of the sixth pipeline, and an outlet of the second pipeline is communicated with a feed inlet of the second rectifying tower; the first inlet of the third pipeline is communicated with the tower top gas phase discharge port of the second rectifying tower, the second inlet of the third pipeline is communicated with the outlet of the seventh pipeline, and the outlet of the third pipeline is communicated with the feed inlet of the third rectifying tower.
Further, a second inlet of the second pipeline is positioned between the first vacuum pump and the feed inlet of the second rectifying tower; the second inlet of the third pipeline is positioned between the second vacuum pump and the feed inlet of the third rectifying tower.
Compared with the prior art, the rectification system for producing the organic silicon has the following advantages:
(1) through setting up three rectifying column, and set up first condenser and second condenser at the gaseous phase discharge port of first rectifying column and second rectifying column respectively, set up first vacuum pump and second vacuum pump rather than being connected again, can lead to the leading-in next rectifying column of product after the condensation and rectify, thereby better rectification effect has been reached, set up vapour and liquid separator in the one end of condenser, and set up the filter box at vapour and liquid separator's gaseous discharge port, can avoid the combustion gas to pollute the air, set up the eduction tube in the bottom of first rectifying column, second rectifying column and third rectifying column, sixth pipeline and seventh pipeline, can rectify the liquid phase after rectifying column rectification separately again, the waste of resource has been avoided, the purpose convenient to use and energy-concerving and environment-protective has been reached.
(2) Set up the limiting plate through the inside at the rectifying column main part to set up swing joint's filter screen in the inside of limiting plate, can filter the collection through the impurity of filter screen in to packing, thereby can the person of facilitating the use dismantle the filter screen and clear up and install the filter screen after the clearance from the filterable impurity in packing in addition, reached the purpose of convenient to use, embodied the rationality of design.
Drawings
FIG. 1 is a schematic diagram of a rectification system for organosilicon production according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a first rectifying tower according to an embodiment of the present invention.
Reference numerals:
1-a material storage tank; 2-a first rectification column; 201-a column body; 202-a feed inlet; 203-overhead gas phase discharge; 204-bottom liquid phase discharge port; 205-a first metal filler layer; 206-a first limiting plate; 207-a first filter; 208-a second metal filler layer; 209-a second limiting plate; 210-a second filter; 3-a first condenser; 4-a first gas-liquid separator; 5-a filter cartridge; 6-a first vacuum pump; 7-a second rectification column; 8-a second condenser; 9-a second gas-liquid separator; 10-a first conduit; 11-a second vacuum pump; 12-a third rectification column; 13-a third condenser; 14-a third gas-liquid separator; 15-a second conduit; 16-a third vacuum pump; 17-a collection tank; 18-a fourth vacuum pump; 19-a first reflux drum; 20-a second reflux drum; 21-a third reflux drum; 22-a third line; 23-a fourth line; 24-a fifth pipeline; 25-a sixth pipeline; 26-a seventh conduit; 27-a fifth vacuum pump; 28-sixth vacuum pump.
Detailed Description
Unless defined otherwise, technical terms used in the following examples have the same meanings as commonly understood by one of ordinary skill in the art to which this invention belongs. The test reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.
The present invention will be described in detail with reference to the following embodiments and accompanying drawings.
As shown in fig. 1-2, a rectification system for organosilicon production comprises a storage tank 1, a first rectification tower 2, a second rectification tower 7, a third rectification tower 12 and a collection tank 17, wherein the storage tank 1 is communicated with a feed inlet of the first rectification tower 2 through a first pipeline 10, and a gas phase discharge outlet at the top of the first rectification tower 2 is sequentially communicated with feed inlets of a first condenser 3, a first gas-liquid separator 4, a first vacuum pump 6 and the second rectification tower 7 through a second pipeline 15; a gas phase discharge port at the top of the second rectifying tower 7 is sequentially communicated with feed inlets of a second condenser 8, a second gas-liquid separator 9, a second vacuum pump 11 and a third rectifying tower 12 through a third pipeline 22; a gas phase discharge port at the top of the third rectifying tower 12 is sequentially communicated with feed inlets of a third condenser 13, a third gas-liquid separator 14, a third vacuum pump 16 and a collecting tank 17 through a fourth pipeline 23; a tower bottom liquid phase discharge port of the first rectifying tower 2 is sequentially communicated with a fourth vacuum pump 18, a first reflux tank 19 and a feed inlet of the first rectifying tower 2 through a fifth pipeline 24; a tower bottom liquid phase discharge port of the second rectifying tower 7 is sequentially communicated with a fifth vacuum pump 27, the second reflux tank 20 and a feed inlet of the second rectifying tower 7 through a sixth pipeline 25; the liquid phase discharge outlet at the bottom of the third distillation column 12 is sequentially communicated with a sixth vacuum pump 28, a third reflux tank 21 and the feed inlet of the third distillation column 12 through a seventh pipeline 26. The gas phase outlets of the first gas-liquid separator 4, the second gas-liquid separator 9 and the third gas-liquid separator 14 are communicated with a filter box 5. By arranging the three rectifying towers, arranging the first condenser 3 and the second condenser 8 at the gas phase exhaust ports of the first rectifying tower 2 and the second rectifying tower 7 respectively, and arranging the first vacuum pump 6 and the second vacuum pump 11 to be connected with the first condenser and the second condenser, the condensed product can be guided into the next rectifying tower for rectification, so that a better rectification effect is achieved; one end of each condenser is provided with a gas-liquid separator, and a gas outlet of the gas-liquid separator is provided with a filter box 5, so that the discharged gas can be prevented from polluting the air, and the purpose of convenient use is achieved.
As an optional embodiment of the present invention, the filter cartridge 5 is an activated carbon filter cartridge 5. The activated carbon filter box 5 can be purchased from the market or manufactured by the user, and the structure can be as follows when manufactured by the user: can dismantle sealing connection has the lid on a box body to pack the active carbon in the box body, set up air inlet and gas outlet on the box body, best can set up the filter screen of interception active carbon in air inlet and gas outlet department, and the material of box body and lid then can select for use heat-resisting corrosion-resistant material, for example polytetrafluoroethylene.
As an optional embodiment of the present invention, the first pipeline 10, the second pipeline 15, and the third pipeline 22 are all three-way pipelines; a first inlet of the first pipeline 10 is communicated with an outlet of the storage tank 1, a second inlet of the first pipeline 10 is communicated with an outlet of the fifth pipeline 24, and an outlet of the first pipeline 10 is communicated with a feed inlet of the first rectifying tower 2; a first inlet of the second pipeline 15 is communicated with a gas phase discharge outlet at the top of the first rectifying tower 2, a second inlet of the second pipeline 15 is communicated with an outlet of the sixth pipeline 25, and an outlet of the second pipeline 15 is communicated with a feed inlet of the second rectifying tower 7; the first inlet of the third pipeline 22 is communicated with the top gas phase discharge port of the second rectifying tower 7, the second inlet of the third pipeline 22 is communicated with the outlet of the seventh pipeline 26, and the outlet of the third pipeline 22 is communicated with the feed inlet of the third rectifying tower 12. Preferably, the second inlet of the second pipeline 15 is positioned between the first vacuum pump 6 and the feed inlet of the second rectifying tower 7; the second inlet of the third pipeline 22 is located between the second vacuum pump 11 and the feed inlet of the third rectification column 12. Therefore, the material entering the first rectifying tower 2 is a mixture of the material from the material storage tank 1 and the bottom distillate of the first rectifying tower 2, similarly, the material entering the second rectifying tower 7 is a mixture of the material from the top of the first rectifying tower 2 after cooling and gas-liquid separation and the bottom distillate of the second rectifying tower 7, and the material entering the third rectifying tower 12 is a mixture of the material from the top of the second rectifying tower 7 after cooling and gas-liquid separation and the bottom distillate of the third rectifying tower 12. Therefore, the liquid phase at the bottom of the tower after rectification in each rectifying tower can be rectified again, the waste of resources is avoided, and the purposes of energy conservation and environmental protection are achieved.
Wherein, the liquid inlet of first gas-liquid separator 4 communicates the export of first condenser 3, is the heat medium export of communicating first condenser 3 specifically, and the heat medium entry of first condenser 3 communicates the top of the tower gas phase discharge port of first rectifying column 2, and the liquid outlet of first gas-liquid separator 4 communicates the entry of first vacuum pump 6, and the gas outlet of first gas-liquid separator 4 communicates its filter cartridge 5 that corresponds. Similarly, the liquid inlet of the second gas-liquid separator 9 is communicated with the outlet of the second condenser 8, specifically, the heat medium outlet of the second condenser 8, the heat medium inlet of the second condenser 8 is communicated with the top gas phase outlet of the second rectifying tower 7, the liquid outlet of the second gas-liquid separator 9 is communicated with the inlet of the second vacuum pump 11, and the gas outlet of the second gas-liquid separator 9 is communicated with the corresponding filter cartridge 5. A liquid inlet of the third gas-liquid separator 14 is communicated with an outlet of the third condenser 13, specifically, a heat medium outlet of the third condenser 13, a heat medium inlet of the third condenser 13 is communicated with a tower top gas phase discharge port of the third rectifying tower 12, a liquid outlet of the third gas-liquid separator 14 is communicated with an inlet of the third vacuum pump 16, and a gas outlet of the third gas-liquid separator 14 is communicated with the corresponding filter box 5.
The first condensed gas, the second condenser 8 and the third condenser 13 may all adopt a shell-and-tube heat exchanger, and the refrigerant for heat exchange may be cold water or oil or other media.
The utility model discloses in, first rectifying column 2, second rectifying column 7, third rectifying column 12 all adopt filler formula rectifying column, and this filler formula rectifying column is equipped with a large amount of packings in the tower and is the gas-liquid mass transfer equipment of alternate contact component, and first rectifying column 2, second rectifying column 7 and third rectifying column 12 structure are the same, and their feed inlets establish the position that leans on in the centre of tower separately best.
As far as the structure of the three rectification columns is concerned: taking the first rectifying tower as an example, as shown in fig. 2, the first rectifying tower comprises a tower main body 201, a tower top gas phase discharge port 203 is arranged at the top of the tower main body 201, and a tower bottom liquid phase discharge port 204 is arranged at the bottom of the tower main body 201; a feed inlet 202 is arranged on the middle part of the tower main body 201. A first metal filler layer 205 and a second metal filler layer 208 are arranged in the tower body 201 at intervals between the feed inlet 202 and the tower bottom liquid phase discharge outlet 204, the first metal filler layer 205 and the second metal filler layer 208 are fixedly arranged on the side wall of the tower body 201 through bolts, and the first metal filler layer 205 and the second metal filler layer 208 can be made of carbon steel filler. A first filter screen 207 is arranged between the first metal filler layer 205 and the second metal filler layer 208, and a second filter screen 210 is arranged between the second metal filler layer 208 and the tower bottom liquid phase discharge port 204.
Preferably, first metal packing layer 205, second metal packing layer 208, first filter screen 207 and second filter screen 210 all with tower main part 201 bottom parallel arrangement, can guarantee like this that first filter screen 207 and the filtration impurity in the biggest collection of second filter screen 210 packs, better, can set first filter screen and second filter screen to big-end-up's back taper.
In addition, in order to facilitate a user to detach the first filter screen 207 and the second filter screen 210 so as to clean impurities filtered from the filler and to install the cleaned first filter screen 207 and the cleaned second filter screen 210, both the first filter screen 207 and the second filter screen 210 are detachably installed in the tower main body 201. More specifically, a ring-shaped first limiting plate 206 and a ring-shaped second limiting plate 209 may be fixedly installed in the tower body 201, and then the first filter 207 and the second filter 210 may be fixed to the inner circumferential side of the first limiting plate 206 and the inner circumferential side of the second limiting plate 209, respectively, by bolts or the like.
Rectification system is used in organosilicon production, during the use, separates the lysate of different boiling points in with organosilicon compound through setting up three rectifying column, can be used for rectifying methyl trichlorosilane and dimethyl dichlorosilane. Specifically, when the method is used, firstly, a cracking product is separated into two parts of a lower boiling point part and a higher boiling point part through the first rectifying tower 2, the lower boiling point part comprises trimethyl monochlorosilane and components (including monomethyl dichlorosilane and the like) with the boiling point lower than that of the trimethyl monochlorosilane, the higher boiling point part comprises dimethyl dichlorosilane, monomethyl trichlorosilane and high-boiling-point substances, the monomethyl trichlorosilane is further recovered through the second rectifying tower 7, and finally, the dimethyl dichlorosilane and the high-boiling-point substances are obtained through separation of the third rectifying tower 12. Wherein, three rectifying towers are arranged, a first condenser 3 and a second condenser 8 are respectively arranged at the gas phase exhaust ports of the first rectifying tower 2 and the second rectifying tower 7, and a first vacuum pump 6 and a second vacuum pump 11 are arranged to be connected with the first condenser and the second condenser, so that the condensed product can be guided into the next rectifying tower for rectification, thereby achieving better rectification effect, one end of each condenser is provided with a gas-liquid separator, and a gas outlet of the gas-liquid separator is provided with a filter box 5, so that the discharged gas can be prevented from polluting the air, the bottom parts of the first rectifying tower 2, the second rectifying tower 7 and the third rectifying tower 12 are provided with the outlet pipes, namely a fifth pipeline 24, a sixth pipeline 25 and a seventh pipeline 26, distillate at the bottom of each rectifying tower flows back to the respective rectifying tower again, and liquid phase rectified by each rectifying tower can be rectified again, so that the purposes of convenience in use, energy conservation and environmental protection are achieved; set up first limiting plate 206 and second limiting plate 209 through the inside at rectifying column main part 201, and set up swing joint (also can dismantle the first filter screen 207 and the second filter screen 210 of connection) in the inside of first limiting plate 206 and second limiting plate 209, can filter the collection through first filter screen 207 and second filter screen 210 to the impurity in the filler, thereby can the person of facilitating the use dismantle first filter screen 207 and second filter screen 210 and clear up and install the filter screen after the clearance to the impurity of filtering from filling, the purpose of convenient to use has been reached, the rationality of design has been embodied.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A rectification system is used in organosilicon production which characterized in that: comprises a material storage tank, a first rectifying tower, a second rectifying tower, a third rectifying tower and a collecting tank;
the material storage tank is communicated with a feed inlet of the first rectifying tower through a first pipeline;
the top gas phase discharge port of the first rectifying tower is sequentially communicated with the first condenser, the first gas-liquid separator, the first vacuum pump and the feed inlet of the second rectifying tower through a second pipeline; the tower bottom liquid phase discharge port of the first rectifying tower is sequentially communicated with a fourth vacuum pump, a first reflux tank and a feed inlet of the first rectifying tower through a fifth pipeline;
the tower top gas phase discharge port of the second rectifying tower is sequentially communicated with a second condenser, a second gas-liquid separator, a second vacuum pump and a feed inlet of a third rectifying tower through a third pipeline; a tower bottom liquid phase discharge port of the second rectifying tower is sequentially communicated with a fifth vacuum pump, a second reflux tank and a feed inlet of the second rectifying tower through a sixth pipeline;
the top gas phase discharge port of the third rectifying tower is sequentially communicated with the feed inlets of a third condenser, a third gas-liquid separator, a third vacuum pump and a collecting tank through a fourth pipeline; a tower bottom liquid phase discharge port of the third rectifying tower is sequentially communicated with a sixth vacuum pump, a third reflux tank and a feed inlet of the third rectifying tower through a seventh pipeline;
and gas outlets of the first gas-liquid separator, the second gas-liquid separator and the third gas-liquid separator are communicated with a filter box.
2. The rectification system for organosilicon production according to claim 1, characterized in that: the filter box is an active carbon filter box.
3. The rectification system for organosilicon production according to claim 1, characterized in that: the outlet of the first condenser is communicated with the liquid inlet of the first gas-liquid separator, and the liquid outlet of the first gas-liquid separator is communicated with the first vacuum pump.
4. The rectification system for organosilicon production according to claim 1, characterized in that: and the outlet of the second condenser is communicated with a liquid inlet of the second gas-liquid separator, and a liquid outlet of the second gas-liquid separator is communicated with the second vacuum pump.
5. The rectification system for organosilicon production according to claim 1, characterized in that: and the outlet of the third condenser is communicated with a liquid inlet of a third gas-liquid separator, and a liquid outlet of the third gas-liquid separator is communicated with a third vacuum pump.
6. The rectification system for organosilicon production according to claim 1, characterized in that: the condenser is a shell-and-tube heat exchanger; the first rectifying tower, the second rectifying tower and the third rectifying tower are all packing type rectifying towers, and the second rectifying tower and the third rectifying tower are all identical to the first rectifying tower in structure.
7. The rectification system for organosilicon production according to claim 6, characterized in that: a first metal packing layer and a second metal packing layer are arranged between a feed inlet and a tower bottom liquid phase discharge port in a tower main body of the first rectifying tower at intervals, a first filter screen is arranged between the first metal packing layer and the second metal packing layer, and a second filter screen is arranged between the second metal packing layer and the tower bottom liquid phase discharge port.
8. The rectification system for organosilicon production according to claim 7, characterized in that: the first metal packing layer, the second metal packing layer, the first filter screen and the second filter screen are all arranged in parallel with the bottom of the tower main body; first filter screen and the equal detachable of second filter screen are installed in the tower main part.
9. The rectification system for organosilicon production according to claim 1, characterized in that: the first pipeline, the second pipeline and the third pipeline are all three-way pipelines; the first inlet of the first pipeline is communicated with the outlet of the storage tank, the second inlet of the first pipeline is communicated with the outlet of the fifth pipeline, and the outlet of the first pipeline is communicated with the feed inlet of the first rectifying tower; the first inlet of the second pipeline is communicated with the tower top gas phase discharge port of the first rectifying tower, the second inlet of the second pipeline is communicated with the outlet of the sixth pipeline, and the outlet of the second pipeline is communicated with the feed inlet of the second rectifying tower; and a first inlet of the third pipeline is communicated with a tower top gas phase discharge port of the second rectifying tower, a second inlet of the third pipeline is communicated with an outlet of the seventh pipeline, and an outlet of the third pipeline is communicated with a feed inlet of the third rectifying tower.
10. The rectification system for organosilicon production according to claim 9, characterized in that: the second inlet of the second pipeline is positioned between the first vacuum pump and the feed inlet of the second rectifying tower; and a second inlet of the third pipeline is positioned between the second vacuum pump and a feed inlet of the third rectifying tower.
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| CN202021593274.3U CN213131979U (en) | 2020-08-04 | 2020-08-04 | Rectification system is used in organosilicon production |
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| CN202021593274.3U CN213131979U (en) | 2020-08-04 | 2020-08-04 | Rectification system is used in organosilicon production |
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| CN213131979U true CN213131979U (en) | 2021-05-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114288699A (en) * | 2021-12-02 | 2022-04-08 | 徐州砥研医药科技有限公司 | Rectification device for preparing benzene-containing medical intermediate and working method thereof |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114288699A (en) * | 2021-12-02 | 2022-04-08 | 徐州砥研医药科技有限公司 | Rectification device for preparing benzene-containing medical intermediate and working method thereof |
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Effective date of registration: 20210927 Address after: Unit 26, room 108, block C, office building, Nangang Industrial Zone, Tianjin Binhai New Area Development Zone, 300350 Patentee after: SINOMEC REFINERY & CHEMICAL Corp.,Ltd. Address before: 230041 no.1301, building C3, Binhu Times Square, northeast corner of intersection of Hangzhou Road and Tibet Road, Baohe District, Hefei City, Anhui Province Patentee before: ANHUI SHIHUA ENGINEERING TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20210507 |