CN103143185A - Diphenylethane rectifying device - Google Patents
Diphenylethane rectifying device Download PDFInfo
- Publication number
- CN103143185A CN103143185A CN2013100908623A CN201310090862A CN103143185A CN 103143185 A CN103143185 A CN 103143185A CN 2013100908623 A CN2013100908623 A CN 2013100908623A CN 201310090862 A CN201310090862 A CN 201310090862A CN 103143185 A CN103143185 A CN 103143185A
- Authority
- CN
- China
- Prior art keywords
- communicated
- branch road
- diphenylethane
- fluid
- branch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a diphenylethane rectifying device which comprises a heating kettle provided with a feed inlet and an air outlet, wherein the heating kettle is connected with a rectifying tower body communicated with the air outlet; a liquid collecting tank, a first level condenser and a second level condenser communicated in cavities are sequentially connected from top to bottom at the top of the body of the rectifying tower; the liquid outlet of the liquid collecting tank is connected with a liquid outlet header pipe connected with a reflux ratio controller in series, the liquid outlet header pipe is connected with a first liquid outlet branch communicated with a fraction receiving tank and a second liquid outlet branch communicated with a product receiving tank, and a pressure balancing header pipe is connected to the top of the second level condenser; the pressure balancing header pipe is communicated with a first balancing branch communicated with the fraction receiving tank and a second balancing branch communicated with the product receiving tank; the fraction receiving tank is further connected with a first suction branch and the product receiving tank is further connected with a second suction branch; and the first and second suction branches are communicated with a vacuumizing device. The device can simplify the process flow for purifying diphenylethane, so that the diphenylethane purity is remarkably improved.
Description
Technical field
The present invention relates to a kind of diphenylethane rectifier unit.
Background technology
1,2-diphenylethane (C14H14) is a kind of important organic synthesis intermediate. its sulfonated products can be used as good leather retanning agent; Dehydrogenation product is the important source material of producing fluorescent whitening agent and dyestuff.In process of production, the general purification mode that repeatedly is recrystallized that adopts obtains highly purified diphenylethane, being about to the crude product diphenylethane dissolves in organic solvent, remove the laggard row recrystallization of impurity, repeatedly recrystallization not only makes technological process become numerous and diverse, and the solvent use amount is large, has strengthened the workload of solvent post-processed, has also strengthened the risk of environmental pollution; Inevitably residual on product in addition have a solvent, can affect the quality of diphenylethane.If adopt the mode of rectification and purification to produce diphenylethane, can avoid defects, therefore be necessary to invent a kind of diphenylethane rectifier unit.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of diphenylethane rectifier unit, simplifies the diphenylethane technological process of purifying and the purpose that obtains the high-purity diphenylethane to reach.
in order to solve the problems of the technologies described above, the invention provides a kind of diphenylethane rectifier unit of following structure, in being to comprise, its design feature establishes the heating kettle of heater, heating kettle is provided with charging aperture and is located at the gas outlet at its top, the heating kettle top is connected with the destilling tower tower body that inner chamber is communicated with the gas outlet, establish the dividing plate that is furnished with a plurality of air passing holes on it in the destilling tower tower body, be placed with packing layer on dividing plate, destilling tower tower body top is by being connected with the collecting tank that inner chamber is communicated with successively in turn on lower reaching, first-stage condenser and secondary condenser, be connected with many connected set liquid bath inner chambers and destilling tower tower body inner chamber and top on the bottom land of collecting tank lower than the tracheae of crossing of collecting tank cell wall setting, be connected with the position on the collecting tank cell wall lower than the liquid outlet of crossing tracheae top setting, be connected with the fluid house steward of serial connection reflux ratio controller on liquid outlet, fluid house steward's the port of export is communicated with the first fluid branch road and the second fluid branch road, the first fluid branch road is communicated with the cut receiving tank, the second fluid branch road is communicated with the product receiving tank, the secondary condenser top is connected with the pressure balance house steward who is communicated with its inner chamber, be communicated with the first balancing branch that is communicated with the cut receiving tank and the second balancing branch that is communicated with the product receiving tank on the pressure balance house steward, the top of cut receiving tank is connected with first branch road of bleeding, the top of product receiving tank is connected with second branch road of bleeding, first branch road and second branch road of bleeding of bleeding is communicated with vacuum extractor.
Described vacuum extractor comprise with first bleed branch road be connected the vavuum pump of bleeding house steward and being connected with the house steward that bleeds that branch road all is communicated with of bleeding.
Be connected with surge tank on the described house steward of bleeding, vavuum pump is communicated with surge tank.
Described surge tank is two, and two surge tanks are interconnected, and one of them surge tank is communicated with the house steward that bleeds, and another surge tank is communicated with vavuum pump.
Described heater is the inner heat(ing) coil that can supply thermal fluid circulation to pass through.
Described the first fluid props up route the first fluid arm and serial connection the first liquid valve thereon forms, and the second fluid props up route the second fluid arm and serial connection the second liquid valve thereon forms; The first balancing branch is comprised of the first balance arm and serial connection the first balanced valve thereon, and the second balancing branch is comprised of the second balance arm and serial connection the second balanced valve thereon; First bleeds, and a route first goes out gas branch pipe and serial connection the first air outlet valve thereon forms, and second bleeds, and a route second goes out gas branch pipe and serial connection the second air outlet valve thereon forms.
Be connected with liquid level gauge on described heating kettle.
Form the air inlet cushion chamber between described dividing plate and gas outlet, the formation cushion chamber of giving vent to anger between packing layer and destilling tower tower body top.
Be communicated with the sampling branch road on described the first fluid branch road.
The route sampling pipe is propped up in described sampling and serial connection sampling valve thereon forms.
The invention has the advantages that: adopt the present invention to produce effectively simplification of flowsheet of diphenylethane, obtain highly purified diphenylethane.
Description of drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail:
Fig. 1 is structural representation of the present invention.
The specific embodiment
As shown in Figure 1, in comprising, establishes the diphenylethane rectifier unit heating kettle 2 of heater 1, heater 1 is the inner heat(ing) coil that can pass through for thermal fluid circulation, namely realizes heating to diphenylethane by the hot fluid that circulates in heat(ing) coil, and hot fluid can adopt conduction oil.the both sides, top of heating kettle 2 are respectively equipped with charging aperture 3 and the service ports 33 that enters for diphenylethane, the bottom of heating kettle 2 is provided with discharging opening 4, the top center position of heating kettle 2 is provided with gas outlet 5, heating kettle 2 tops are connected with the destilling tower tower body 6 that inner chamber is communicated with gas outlet 5, establish dividing plate 10 in destilling tower tower body 6, be furnished with a plurality of air passing holes 11 on dividing plate 10, be placed with packing layer 12 on dividing plate 10, packing layer 12 is made of pile some fillers of putting on dividing plate 10, filler is existing product, for example can adopt Pall ring, Raschig ring, ceramic filler, stainless steel structured packing etc.Dividing plate 10 leaves heating kettle 2 bottom one segment distance settings, be to form air inlet cushion chamber 31 between dividing plate 10 and gas outlet 5, also leave a segment distance between packing layer 12 tops and destilling tower tower body 6 tops, namely form the cushion chamber 32 of giving vent to anger between packing layer 12 and destilling tower tower body 6 tops.Heating kettle 2 sidepieces are connected with liquid level gauge 29.Destilling tower tower body 6 tops are by connecting successively collecting tank 7, first-stage condenser 8 and secondary condenser 9 on lower reaching; First-stage condenser 8 and secondary condenser 9 structures are basic identical, all comprise housing 89 and be located at the interior cooling coil 90 of housing 89, described housing 89 bottoms all are provided with air inlet, and difference is that the top of the housing of first-stage condenser 8 also is provided with the gas outlet that is communicated with the air inlet of secondary condenser 9; The cooling coil 90 of first-stage condenser 8 and secondary condenser 9 is serially connected by pipeline.The air inlet of first-stage condenser 8 is communicated with the inner chamber of collecting tank 7.Be connected with many on the bottom land of collecting tank 7 and cross tracheae 13, collecting tank inner chamber and destilling tower tower body inner chamber are crossed tracheae 13 by many and are communicated with, the many tops of crossing tracheae 13 all arrange lower than the collecting tank cell wall, are connected with the position on the collecting tank cell wall lower than the described liquid outlet 14 of crossing tracheae top setting.
Be connected with the fluid house steward 15 of serial connection reflux ratio controller 16 on liquid outlet 14, reflux ratio controller 16 is existing product, can automatically accurately control capacity of returns and produced quantity.Fluid house steward 15 the port of export is communicated with the first fluid branch road 17 and the second fluid branch road 18, the first fluid branch road 17 is comprised of the first fluid arm 171 and serial connection the first liquid valve 172 thereon, and the second fluid branch road 18 is comprised of the second fluid arm 182 and serial connection the second liquid valve 181 thereon; The first fluid branch road 17 is communicated with cut receiving tank 19, and the second fluid branch road 18 is communicated with product receiving tank 20.Cut receiving tank 19 is identical with product receiving tank 20 structures, all comprise tank body 201, described tank body 201 tops are provided with evacuated tube 203, liquor inlet 204, bleeding point 205 and the pressure balance mouth 208 of serial connection exhaust-valve 202, and described tank body 201 bottoms are provided with the vomit pipe 207 of serial connection baiting valve 206.The first fluid branch road 17 is communicated with cut receiving tank 19 by the liquor inlet 204 of cut receiving tank 19, and the second fluid branch road 18 is communicated with product receiving tank 20 by the liquor inlet 204 of product receiving tank 20.Be communicated with sampling branch road 30 on the first fluid branch road 17, described sampling branch road 30 is comprised of sampling pipe 301 and serial connection sampling valve 302 thereon.Secondary condenser 9 tops are connected with the pressure balance house steward 21 who is communicated with its inner chamber, be communicated with the first balancing branch 22 and the second balancing branch 23 on pressure balance house steward 21, the first balancing branch 22 is communicated with cut receiving tank 19 by the pressure balance mouth 208 of cut receiving tank 19, and the second balancing branch 23 is communicated with product receiving tank 20 by the pressure balance mouth 208 of product receiving tank 20.The first balancing branch 22 is comprised of the first balance arm 221 and serial connection the first balanced valve 222 thereon, and the second balancing branch 23 is comprised of the second balance arm 232 and serial connection the second balanced valve 231 thereon.Cut receiving tank 19 is communicated with by the bleeding point 205 and first at its top branch road 24 of bleeding, product receiving tank 20 is communicated with by the bleeding point 205 and second at its top branch road 25 of bleeding, first bleeds, and branch road 24 goes out gas branch pipe 241 by first and serial connection the first air outlet valve 242 thereon forms, and second bleeds, and branch road 25 goes out gas branch pipe 251 by second and serial connection the second air outlet valve 252 thereon forms.First branch road 24 and second branch road 25 of bleeding of bleeding is communicated with vacuum extractor.
Described vacuum extractor comprise with first bleed branch road 24 be connected the vavuum pump 27 of bleeding house steward 26 and being connected with the house steward 26 that bleeds that branch road 25 all is communicated with of bleeding.The vacuum extractor of said structure can be done following improvement.Namely be connected with surge tank 28 on the house steward 26 that bleeds, vavuum pump 27 is communicated with surge tank 28.Further improving is that surge tank 28 is made as two, and two surge tanks 28 are interconnected, and one of them surge tank 28 is communicated with the house steward 26 that bleeds, and another surge tank 28 is communicated with vavuum pump 27.The main cushioning effect that rises of surge tank 28, when preventing that vavuum pump 27 from not working, the liquid suck-back with vavuum pump 27 under the effect of negative pressure enters in product receiving tank 20, and surge tank 28 has been arranged, as above-mentioned situation occurs, the liquid of vavuum pump 27 can only be inhaled in surge tank 28 under the effect of negative pressure.
Use procedure of the present invention is as follows: thermal fluid circulation is passed into heater 1, liquid diphenylethane crude product is sent in heating kettle 2 by charging aperture 3, diphenylethane is heated; Close the second fluid branch road 18, the second balancing branch 23, sampling branch road 30 and second branch road 25 of bleeding, keep the first fluid branch road 17, the first balancing branch 22 and first branch road 24 of bleeding unimpeded, open vavuum pump 27.along with heating is carried out, the diphenylethane that becomes gaseous state enters in destilling tower tower body 6 by the gas outlet 5 at heating kettle 2 tops, pass destilling tower tower body 6 inner chambers, cross tracheae 13 and enter first-stage condenser 8, do not have the tail gas of condensation to continue to rise to enter to carry out condensation in secondary condenser 9, condensate liquid flows in collecting tank 7, condensate liquid is by liquid outlet 14, fluid house steward 15 and backflow ratio controller 16 flow into cut receiving tank 19, detect by 30 samplings of sampling branch road, after the detection index meets the setting requirement, close the first fluid branch road 17, the first balancing branch 22 and first branch road 24 of bleeding, keep the second fluid branch road 18, the second balancing branch 23 and second branch road 25 of bleeding is unimpeded, make the condensate liquid as product flow into product receiving tank 20.In whole distillation process, reflux ratio controller 16 be can pass through and capacity of returns and produced quantity automatically controlled, the condensate liquid of namely controlling in collecting tank passes back into the amount in heating kettle and passes through the amount that liquid outlet 14 flows out via crossing tracheae, to reach best rectification effect.
Claims (10)
1. diphenylethane rectifier unit, establish the heating kettle (2) of heater (1) in it is characterized in that comprising, heating kettle (2) is provided with charging aperture (3) and is located at the gas outlet (5) at its top, heating kettle (2) top is connected with the destilling tower tower body (6) that inner chamber is communicated with gas outlet (5), establish the dividing plate (10) that is furnished with a plurality of air passing holes (11) on it in destilling tower tower body (6), be placed with packing layer (12) on dividing plate (10); destilling tower tower body (6) top is by being connected with the collecting tank (7) that inner chamber is communicated with successively in turn on lower reaching, first-stage condenser (8) and secondary condenser (9), be connected with the tracheae (13) excessively that many connected set liquid bath inner chambers and destilling tower tower body inner chamber and top arrange lower than the collecting tank cell wall on the bottom land of collecting tank (7), be connected with the position on the collecting tank cell wall lower than the liquid outlet (14) of crossing tracheae top setting, be connected with the fluid house steward (15) of serial connection reflux ratio controller (16) on liquid outlet (14), fluid house steward's (15) the port of export is communicated with the first fluid branch road (17) and the second fluid branch road (18), the first fluid branch road (17) is communicated with cut receiving tank (19), the second fluid branch road (18) is communicated with product receiving tank (20), secondary condenser (9) top is connected with the pressure balance house steward (21) who is communicated with its inner chamber, be communicated with the first balancing branch (22) that is communicated with cut receiving tank (19) and the second balancing branch (23) that is communicated with product receiving tank (20) on pressure balance house steward (21), the top of cut receiving tank (19) is connected with first branch road (24) of bleeding, the top of product receiving tank (20) is connected with second branch road (25) of bleeding, first branch road (24) and second branch road (25) of bleeding of bleeding is communicated with vacuum extractor.
2. diphenylethane rectifier unit as claimed in claim 1 is characterized in that: described vacuum extractor comprise with first bleed branch road (24) be connected the house steward that bleeds (26) that branch road (25) all is communicated with and the vavuum pump (27) that is connected with the house steward that bleeds (26) of bleeding.
3. diphenylethane rectifier unit as claimed in claim 2, it is characterized in that: be connected with surge tank (28) on the described house steward of bleeding (26), vavuum pump (27) is communicated with surge tank (28).
4. diphenylethane rectifier unit as claimed in claim 3, it is characterized in that: described surge tank (28) is two, two surge tanks (28) are interconnected, and one of them surge tank (28) is communicated with the house steward that bleeds (26), and another surge tank (28) is communicated with vavuum pump (27).
5. diphenylethane rectifier unit as claimed in claim 1, is characterized in that: the heat(ing) coil that described heater (1) can supply thermal fluid circulation to pass through for inside.
6. diphenylethane rectifier unit as claimed in claim 1, it is characterized in that: described the first fluid branch road (17) is comprised of the first fluid arm (171) and serial connection the first liquid valve (172) thereon, and the second fluid branch road (18) is comprised of the second fluid arm (182) and serial connection the second liquid valve (181) thereon; The first balancing branch (22) is comprised of the first balance arm (221) and serial connection the first balanced valve (222) thereon, and the second balancing branch (23) is comprised of the second balance arm (232) and serial connection the second balanced valve (231) thereon; First bleeds, and branch road (24) goes out gas branch pipe (241) by first and serial connection the first air outlet valve (242) thereon forms, and second bleeds, and branch road (25) goes out gas branch pipe (251) by second and serial connection the second air outlet valve (252) thereon forms.
7. diphenylethane rectifier unit as claimed in claim 1, is characterized in that: be connected with liquid level gauge (29) on described heating kettle (2).
8. diphenylethane rectifier unit as claimed in claim 1 is characterized in that: form air inlet cushion chamber (31) between described dividing plate (10) and gas outlet (5), the formation cushion chamber (32) of giving vent to anger between packing layer (12) and destilling tower tower body (6) top.
9. diphenylethane rectifier unit as described in arbitrary claim in claim 1-8, is characterized in that: be communicated with sampling branch road (30) on described the first fluid branch road (17).
10. diphenylethane rectifier unit as claimed in claim 1 is characterized in that: described sampling branch road (30) is comprised of sampling pipe (301) and serial connection sampling valve (302) thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100908623A CN103143185A (en) | 2013-03-21 | 2013-03-21 | Diphenylethane rectifying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100908623A CN103143185A (en) | 2013-03-21 | 2013-03-21 | Diphenylethane rectifying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103143185A true CN103143185A (en) | 2013-06-12 |
Family
ID=48541662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100908623A Pending CN103143185A (en) | 2013-03-21 | 2013-03-21 | Diphenylethane rectifying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103143185A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106139640A (en) * | 2016-08-30 | 2016-11-23 | 无锡东恒新能源科技有限公司 | A kind of economic benefits and social benefits organic solvent extraction device |
| CN106178590A (en) * | 2016-08-30 | 2016-12-07 | 无锡东恒新能源科技有限公司 | Dual fail-safe evacuation organic solvent extraction device |
| CN106267862A (en) * | 2016-08-30 | 2017-01-04 | 无锡东恒新能源科技有限公司 | A kind of multilamellar airtight organic solvent extraction device |
| CN112675565A (en) * | 2020-12-03 | 2021-04-20 | 涡阳县华腾日用化学品有限公司 | Daily chemical production device and method with distillation function and rapid discharging function |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1137019A (en) * | 1979-02-13 | 1982-12-07 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Process for recovering heat in distillation process |
| CN1031190A (en) * | 1988-06-06 | 1989-02-22 | 天津大学 | The rectificating method of high-solidification point mixture and device thereof |
| US6280578B1 (en) * | 1997-04-21 | 2001-08-28 | Evgueni D. Petroukhine | Operation process of a pumping-ejection stand for distilling liquid products |
| CN201094869Y (en) * | 2007-09-24 | 2008-08-06 | 上海益民化工有限公司 | Multipurpose internal reflux distillation device |
| CN201384866Y (en) * | 2009-02-10 | 2010-01-20 | 北京极易化工有限公司 | Vertical automatic reflux-withdrawal rectifying device |
| CN102107132A (en) * | 2009-12-28 | 2011-06-29 | 北京有色金属研究总院 | Rectifying photochlorination device |
| CN202110084U (en) * | 2011-04-22 | 2012-01-11 | 郭学阳 | Bis-(Gamma-triethoxysilylpropyl)-tetrasulfide distillation and sampling device |
| CN202554987U (en) * | 2012-04-05 | 2012-11-28 | 南京师范大学 | Tower top discharge device of decompression rectification tower |
-
2013
- 2013-03-21 CN CN2013100908623A patent/CN103143185A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1137019A (en) * | 1979-02-13 | 1982-12-07 | Ishikawajima-Harima Jukogyo Kabushiki Kaisha | Process for recovering heat in distillation process |
| CN1031190A (en) * | 1988-06-06 | 1989-02-22 | 天津大学 | The rectificating method of high-solidification point mixture and device thereof |
| US6280578B1 (en) * | 1997-04-21 | 2001-08-28 | Evgueni D. Petroukhine | Operation process of a pumping-ejection stand for distilling liquid products |
| CN201094869Y (en) * | 2007-09-24 | 2008-08-06 | 上海益民化工有限公司 | Multipurpose internal reflux distillation device |
| CN201384866Y (en) * | 2009-02-10 | 2010-01-20 | 北京极易化工有限公司 | Vertical automatic reflux-withdrawal rectifying device |
| CN102107132A (en) * | 2009-12-28 | 2011-06-29 | 北京有色金属研究总院 | Rectifying photochlorination device |
| CN202110084U (en) * | 2011-04-22 | 2012-01-11 | 郭学阳 | Bis-(Gamma-triethoxysilylpropyl)-tetrasulfide distillation and sampling device |
| CN202554987U (en) * | 2012-04-05 | 2012-11-28 | 南京师范大学 | Tower top discharge device of decompression rectification tower |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106139640A (en) * | 2016-08-30 | 2016-11-23 | 无锡东恒新能源科技有限公司 | A kind of economic benefits and social benefits organic solvent extraction device |
| CN106178590A (en) * | 2016-08-30 | 2016-12-07 | 无锡东恒新能源科技有限公司 | Dual fail-safe evacuation organic solvent extraction device |
| CN106267862A (en) * | 2016-08-30 | 2017-01-04 | 无锡东恒新能源科技有限公司 | A kind of multilamellar airtight organic solvent extraction device |
| CN112675565A (en) * | 2020-12-03 | 2021-04-20 | 涡阳县华腾日用化学品有限公司 | Daily chemical production device and method with distillation function and rapid discharging function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103143185A (en) | Diphenylethane rectifying device | |
| CN204999869U (en) | Triethylene glycol dewatering device | |
| CN207324519U (en) | A kind of alcohol organic solvent is dehydrated enrichment facility | |
| CN104630391A (en) | Novel water jet condenser with multiple closed water chambers and jet flow control valve | |
| CN111389039B (en) | Energy-saving system for rectifying heat energy closed circulation | |
| CN203886221U (en) | Light benzol and heavy benzol separation device | |
| CN107320992A (en) | A kind of distilling apparatus and distillation control method | |
| CN204767516U (en) | Rectification forced circulation heating device | |
| CN208525838U (en) | Reboiler and rectifying column | |
| CN108525338A (en) | Alcohol recycle rectifying device and alcohol recycle rectificating method | |
| CN206818001U (en) | A kind of water-cooled condensing unit and its silicone oil synthesizer of composition of connecting | |
| CN206666416U (en) | Piece-rate system for low carbon mixed alcohol | |
| CN201306703Y (en) | Steam trap | |
| CN205182769U (en) | Backward flow condensing equipment of inert gas atmosphere is provided at chemical reaction in -process | |
| CN106237645A (en) | A kind of water vapor distillation apparatus and its implementation | |
| CN203187423U (en) | Integrated multi-stage continuous water purifier | |
| CN203425547U (en) | Reboiling and flash evaporation fractionating tower | |
| CN205580229U (en) | Condensing equipment of production inhibition antisludging agent | |
| CN206499893U (en) | A kind of external circulation heating formula classification alcohol concentration and recovery device with rectifying column | |
| CN202440446U (en) | Recovery device for methanol | |
| CN220495612U (en) | Still for recovering ethanol | |
| CN202951358U (en) | Liquid-vapor separation and air filtration system of waste treatment device | |
| CN203944148U (en) | A kind of distillation system | |
| CN220656422U (en) | Heavy-duty removal tower for crude benzene | |
| CN210314130U (en) | C7-C12 component separation unit of aromatization device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130612 |