CN201415064Y - Flash evaporator used in chemical production - Google Patents
Flash evaporator used in chemical production Download PDFInfo
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- CN201415064Y CN201415064Y CN2009201069297U CN200920106929U CN201415064Y CN 201415064 Y CN201415064 Y CN 201415064Y CN 2009201069297 U CN2009201069297 U CN 2009201069297U CN 200920106929 U CN200920106929 U CN 200920106929U CN 201415064 Y CN201415064 Y CN 201415064Y
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- flash vessel
- charging aperture
- circular passage
- urceolus
- deflector
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Abstract
The utility model relates to a flash evaporator used in chemical production, which belongs to the technical field of chemical equipment, and comprises a cylinder body, a two phase separating distributor and a demisting device, wherein a feed opening is formed on the side surface of the cylinder body, a gas phase outlet is arranged at the top part of the cylinder body, a liquid phase outlet is arranged at the bottom part of the cylinder body, the two phase separating distributor is arranged in the flash evaporator in the position connected with the feed opening, and the demisting device is arranged above the feed opening in the flash evaporator. The flash evaporator used in chemical production provided by the utility model is used in the process of synthesizing carbonyl into acetic acid oracetic anhydride, and can carry out an satisfactory separation of the gas and the liquid phases, uniformize the gas distribution, remarkably reduce the entrainment and the accelerant loss, and lessenthe production cost of acetic acid or acetic anhydride.
Description
Technical field
The utility model relates to a kind of flash vessel that is used for Chemical Manufacture, belongs to technical field of chemical.
Background technology
In the technology of carbonyl synthesis acetic acid or aceticanhydride, material benzenemethanol or methyl acetate generate acetic acid or aceticanhydride with carbon monoxide generation carbonylation under homogeneous catalyst (being mainly group VIII metallic catalyst such as rhodium and iridium etc.) and halogen catalyst (as iodomethane) effect.
The reaction liquid of extracting out from reactor enters flash vessel, under depressurization, flash to gas-liquid two-phase, gas phase is the co-catalyst in the reactant liquor and other is than light component and product acetic acid or aceticanhydride, enter subsequent handling and separate purification, obtain acetic acid or aceticanhydride product at last, liquid phase is the reactant mixture residual solution that contains catalyst and other heavier component, enters the bottom of flash vessel, is recycled to and participates in reaction in the reactor.Because the gas phase of flash distillation meeting entrained catalyst, in the flash vessel in existing acetic acid or aceticanhydride technology, exchange bigger flash distillation space for by volume or the employing tangential admission that enlarges flash vessel, simultaneously cyclone separator is set at the gaseous phase outlet place, make the drop that contains catalyst in the gas phase be condensed into bigger drop and get back in the reactant mixture residual solution bottom the flash vessel, this method can reduce the entrainment of flash vessel, but the droplet that still has small part to contain catalyst is entrained in the post-order process inevitably, causes the loss of catalyst.The catalyst that uses in carbonyl synthesis acetic acid or aceticanhydride is very expensive, so the loss of catalyst will inevitably cause the increase of production cost.
The content of invention
The purpose of this utility model is to propose a kind of flash vessel that is used for Chemical Manufacture, and to strengthen the separation of gas-liquid two-phase, all the distribution of oxidizing gases effectively reduces entrainment.
The flash vessel that is used for Chemical Manufacture that the utility model proposes, comprise cylindrical shell, two-phase separation distributions device and Despumation device, described cylindrical shell side is provided with charging aperture, the cylindrical shell top is provided with gaseous phase outlet, the cylindrical shell bottom is provided with the liquid phase outlet, and described two-phase separation distributions device places in the flash vessel and described charging aperture connection; Described Despumation device places the top of described charging aperture position in the flash vessel.
In the above-mentioned flash vessel, two-phase separation distributions device is any in streamline two-phase separation distributions device, two phase separator, distributor, distributor pipe, demister or the column plate.
In the above-mentioned flash vessel, Despumation device is any in wire mesh demister, cyclone separator, deflection plate demister or the eddy flow plate demister.
Streamline two-phase separation distributions device in the above-mentioned flash vessel, can be axial flow line formula two-phase separation distributions device, form by urceolus, inner core, top board, flow distribution plate, deflector and gusset, the last lower edge of described urceolus and the barrel wall relative fixed of flash vessel, described inner core places the inboard of urceolus, top board is a ring plate, place the top of urceolus and inner core, the upper edge of urceolus and inner core respectively with the outer annular edge and the interior ring limit relative fixed of top board, urceolus, inner core and top board are formed a circular passage; One side of annular flow path has charging aperture, and this charging aperture is connected with the charging aperture of described flash vessel, and the opposite side relative with charging aperture of circular passage is the blind area; The height of circular passage is 1～3 times of described flash vessel charging aperture diameter D, and the width of circular passage is 0.5～3 times of flash vessel charging aperture diameter; Described flow distribution plate places the center of charging aperture; Described deflector has a plurality of, and symmetry is distributed in the annular flow path of flow distribution plate both sides, a side of deflector and urceolus relative fixed, and another side and inner core relative fixed, the angle α of deflector and described flash vessel barrel diameter direction is 0～30 degree; Described gusset places the top of circular passage, the barrel wall relative fixed of the side of gusset and described flash vessel, and the base of gusset and the top board of described circular passage are fixed.
Streamline two-phase separation distributions device in the above-mentioned flash vessel, also can be slipstream line formula two-phase separation distributions device, form by urceolus, inner core, top board, deflector and gusset, the last lower edge of described urceolus and the barrel wall relative fixed of flash vessel, described inner core places the inboard of urceolus, and top board is a ring plate, places the top of urceolus and inner core, the upper edge of urceolus and inner core respectively with the outer annular edge and the interior ring limit relative fixed of top board, urceolus, inner core and top board are formed a circular passage; One side of annular flow path has charging aperture, and this charging aperture is connected with the charging aperture of described flash vessel, and a side of this charging aperture is provided with end plate; The height of circular passage is 1～3 times of described flash vessel charging aperture diameter D, and the width of circular passage is 0.5～3 times of flash vessel charging aperture diameter; Described deflector has a plurality of, is distributed in the annular flow path of charging aperture opposite side, equate with the height of circular passage from the height of charging aperture deflector farthest, this farthest deflector and described end plate between form the blind area; One side of deflector and urceolus relative fixed, another side and inner core relative fixed, the angle α of deflector and described flash vessel barrel diameter direction is 0～30 degree; Described gusset places the top of circular passage, the barrel wall relative fixed of the side of gusset and described flash vessel, and the base of gusset and the top board of described circular passage are fixed.
Streamline two-phase separation distributions device in the above-mentioned flash vessel, deflector wherein be shaped as flat board, dull and stereotyped hypomere is a straight line, epimere is a camber line, the height h of straightway
1, h
2H
nChange from small to big successively, the length of arc is π R/2, and wherein R is 0.125～0.625 times of described flash vessel charging aperture diameter D, the distance H between deflector top and the described top board
1, H
2H
n, successively from large to small, H
1Be 0.9～0.1 times of described circular passage height, H
nBe zero.
The flash vessel that is used for Chemical Manufacture that the utility model proposes, be used for carbonyl synthesis acetic acid or aceticanhydride technology, can make gas-liquid two-phase be able to good separation, all the distribution of oxidizing gases, significantly reduce the loss of entrainment and minimizing catalyst, reduce the production cost of acetic acid or aceticanhydride.The flash vessel that the utility model proposes is not limited to the flash process in acetic acid or the aceticanhydride technology, can be applied to the flash process in any Chemical Manufacture.
Description of drawings
Fig. 1 is the structural representation of the utility model flash vessel.
Fig. 2 is the vertical view of the axial streamline two-phase separation distributions device that uses in this flash vessel.
Fig. 3 is the vertical view of the tangential streamline two-phase separation distributions device that uses in this flash vessel.
Fig. 4 is the A-A cutaway view of axial streamline two-phase separation distributions device shown in Figure 2.
Among Fig. 1-Fig. 4, the 1st, cylindrical shell, the 2nd, charging aperture, the 3rd, gaseous phase outlet, the 4th, Despumation device, the 5th, two-phase separation distributions device, the 6th, liquid phase outlet, the 51st, inner core, the 52nd, urceolus, the 53rd, deflector, the 54th, gusset, the 55th, top board, the 56th, flow distribution plate, the 57th, end plate.
The specific embodiment
The flash vessel that is used for Chemical Manufacture that the utility model proposes, its structure comprise cylindrical shell 1, two-phase separation distributions device 5 and Despumation device 4 as shown in Figure 1.The cylindrical shell side is provided with charging aperture 2, and the cylindrical shell top is provided with gaseous phase outlet 3, and the cylindrical shell bottom is provided with liquid phase outlet 6, and two-phase separation distributions device 5 places in the flash vessel and charging aperture 2 connections, and Despumation device 4 places the top of charging aperture 2 positions in the flash vessel.
In the above-mentioned flash vessel, two-phase separation distributions device is any in streamline two-phase separation distributions device, two phase separator, distributor, distributor pipe, demister or the column plate.
In the above-mentioned flash vessel, Despumation device is any in wire mesh demister, cyclone separator, deflection plate demister or the eddy flow plate demister.
Streamline two-phase separation distributions device in the above-mentioned flash vessel can adopt axial streamline two-phase separation distributions device, and its structure such as Fig. 2 and shown in Figure 4 are made up of urceolus 52, inner core 51, top board 55, flow distribution plate 56, deflector 53 and gusset 54.The inwall relative fixed of the last lower edge of urceolus 52 and the cylindrical shell 1 of flash vessel, inner core 51 places the inboard of urceolus 52, top board 55 is a ring plate, place the top of urceolus and inner core, the upper edge of urceolus 52 and inner core 51 respectively with the outer annular edge and the interior ring limit relative fixed of top board 55, urceolus, inner core and top board are formed a circular passage.One side of annular flow path has charging aperture, and this charging aperture is connected with the charging aperture 2 of flash vessel, and the opposite side relative with charging aperture of circular passage is blind area M.The height H of circular passage is 1～3 times of described flash vessel charging aperture diameter D, and the width of circular passage is 0.5～3 times of flash vessel charging aperture diameter D.Flow distribution plate 56 places the center of charging aperture 2.Deflector 53 has a plurality of, and symmetry is distributed in the annular flow path of flow distribution plate both sides, a side of deflector 53 and urceolus 52 relative fixed, and another side and inner core 51 relative fixed, deflector 53 is 0～30 jiao with the angle α of flash vessel barrel diameter direction.Gusset 54 places the top of circular passage, the barrel wall relative fixed of the side of gusset and described flash vessel, and the base of gusset and the top board of described circular passage are fixed.
The wherein formation of the blind area M of the opposite side relative with charging aperture of circular passage is that this deflector blocks the circular passage, thereby forms the blind area on the circular passage owing to equal the height of circular passage with the height of the immediate deflector in blind area.The existence of blind area can be saved equipment and materials, reduces product cost.
Streamline two-phase separation distributions device in the above-mentioned flash vessel also can be slipstream line formula two-phase separation distributions device, and its structure is made up of urceolus 52, inner core 51, top board 55, end plate 57, deflector 53 and gusset 54 as shown in Figure 3.The inwall relative fixed of the last lower edge of urceolus 52 and the cylindrical shell 1 of flash vessel.Inner core 51 places the inboard of urceolus 52, top board 55 is a ring plate, place the top of urceolus 52 and inner core 51, the upper edge of urceolus 52 and inner core 51 respectively with the outer annular edge and the interior ring limit relative fixed of top board, urceolus 52, inner core 51 and top board 55 are formed a circular passage.One side of annular flow path has charging aperture, and this charging aperture is connected with the charging aperture 2 of flash vessel, and a side of this charging aperture is provided with end plate 57.The height of circular passage is 1～3 times of described flash vessel charging aperture diameter D, and the width of circular passage is 0.5～3 times of flash vessel charging aperture diameter.Deflector has a plurality of, is distributed in the annular flow path of charging aperture opposite side, equate with the height of circular passage from the height of charging aperture deflector farthest, this farthest deflector and described end plate between form the blind area.One side of deflector 53 and urceolus relative fixed, another side and inner core relative fixed, deflector 52 is 0～30 degree with the diametric angle α of described flash vessel cylindrical shell 1.Gusset 54 places the top of circular passage, the inwall relative fixed of the side of gusset and the cylindrical shell of described flash vessel 1, and the base of gusset and the top board of described circular passage 55 are fixing.
Streamline two-phase separation distributions device in the above-mentioned flash vessel, deflector 53 wherein be shaped as flat board, dull and stereotyped hypomere is a straight line, epimere is a camber line, the height h of straightway
1, h
2H
nChange from small to big successively, the length of arc is π R/2, and wherein R is 0.125～0.625 times of described flash vessel charging aperture diameter D, the distance H between deflector top and the described top board
1, H
2H
n, successively from large to small, H
1Be 0.9～0.1 times of described circular passage height, H
nBe zero, as shown in Figure 4.
Below be example to adopt axial streamline two-phase separation distributions device, introduce the course of work of the flash vessel that the utility model proposes in conjunction with the accompanying drawings:
The reaction liquid of extracting out from reactor is after decompression, enter the streamline two-phase separation distributions device of flash vessel by charging aperture 2, gas-liquid two-phase after the flash distillation is divided into two strands through flow distribution plate 56 and enters in the circular passage of being made up of top board 55, inner core 51 and urceolus 52, the deflector 53 that is provided with in the passage makes biphase gas and liquid flow change into downward direction by level side, most drops can be thrown to the bottom of flash vessel like this, reach the purpose of gas-liquid separation, gas phase is turned back after the reflection of flash vessel bottom again and is passed the separation distributions device upwards.Improve gradually from feed side to afterbody the installation site of deflector 53, gas-liquid flow is cut gradually, makes the axial distribution homogenizing of gas in flash vessel, this process intensification the gas-liquid two-phase effect of separating, homogenizing the distribution of gas, can effectively reduce the loss of entrainment and catalyst.Simultaneously, because this distributor particular structure for the flash vessel of equal volume, behind the increase streamline two-phase separation distributions device, can obviously improve the disposal ability of flash vessel.Above the flash vessel feed entrance point, demister is set, further the effectively loss of control entrainment and minimizing catalyst.
The urceolus of streamline two-phase separation distributions device, gas-liquid two-phase direct and after the flash distillation contacts, and gas directly is flushed on the urceolus, has reduced the erosion corrosion of flash vessel barrel wall, can suitably reduce the thickness of barrel wall material, reduces investment.
Below introduce an embodiment of the present utility model:
In the present embodiment, urceolus is close to the flash vessel cylindrical shell, and the height of circular passage is 1.5 times of charging aperture diameter, the width of circular passage is 0.5 times of charging aperture diameter, the number of gusset is 10, and deflector is 8, and the diametric(al) angle α of deflector and flash vessel cylindrical shell is 30 degree.Flash vessel top Despumation device 4 adopts wire mesh demister, and the diameter of demister is 1/10 of a flash vessel barrel diameter, and the height of demister is 0.15m, and the voidage of silk screen is 0.95 in the demister.
More than explanation and description only are the embodiments that adopts for those skilled in the art can better understand the utility model, protection domain of the present utility model are not construed as limiting.Under the situation that does not break away from the scope that claim protects, the utility model can carry out any correction and change.
Claims (6)
1, a kind of flash vessel that is used for Chemical Manufacture, it is characterized in that this flash vessel comprises cylindrical shell, two-phase separation distributions device and Despumation device, described cylindrical shell side is provided with charging aperture, the cylindrical shell top is provided with gaseous phase outlet, the cylindrical shell bottom is provided with the liquid phase outlet, and described two-phase separation distributions device places in the flash vessel and described charging aperture connection; Described Despumation device places the top of described charging aperture position in the flash vessel.
2, flash vessel as claimed in claim 1 is characterized in that wherein said two-phase separation distributions device is any in streamline two-phase separation distributions device, two phase separator, distributor, distributor pipe, demister or the column plate.
3, flash vessel as claimed in claim 1 is characterized in that wherein said Despumation device is any in wire mesh demister, cyclone separator, deflection plate demister or the eddy flow plate demister.
4, flash vessel as claimed in claim 2, it is characterized in that wherein said streamline two-phase separation distributions device is axial streamline two-phase separation distributions device, form by urceolus, inner core, top board, flow distribution plate, deflector and gusset, the last lower edge of described urceolus and the barrel wall relative fixed of flash vessel, described inner core places the inboard of urceolus, top board is a ring plate, place the top of urceolus and inner core, the upper edge of urceolus and inner core respectively with the outer annular edge and the interior ring limit relative fixed of top board, urceolus, inner core and top board are formed a circular passage; One side of circular passage has charging aperture, and this charging aperture is connected with the charging aperture of described flash vessel, and the opposite side relative with charging aperture of circular passage is the blind area; The height of circular passage is 1～3 times of described flash vessel charging aperture diameter D, and the width of circular passage is 0.5～3 times of flash vessel charging aperture diameter; Described flow distribution plate places the center of charging aperture; Described deflector has a plurality of, and symmetry is distributed in the circular passage of flow distribution plate both sides, a side of deflector and urceolus relative fixed, and another side and inner core relative fixed, the angle α of deflector and described flash vessel barrel diameter direction is 0～30 degree; Described gusset places the top of circular passage, the barrel wall relative fixed of the side of gusset and described flash vessel, and the base of gusset and the top board of described circular passage are fixed.
5, flash vessel as claimed in claim 2, it is characterized in that wherein said streamline two-phase separation distributions device is tangential streamline two-phase separation distributions device, form by urceolus, inner core, top board, end plate, deflector and gusset, the last lower edge of described urceolus and the barrel wall relative fixed of flash vessel, described inner core places the inboard of urceolus, top board is a ring plate, place the top of urceolus and inner core, the upper edge of urceolus and inner core respectively with the outer annular edge and the interior ring limit relative fixed of top board, urceolus, inner core and top board are formed a circular passage; One side of circular passage has charging aperture, and this charging aperture is connected with the charging aperture of described flash vessel, and a side of this charging aperture is provided with end plate; The height of circular passage is 1～3 times of described flash vessel charging aperture diameter D, and the width of circular passage is 0.5～3 times of flash vessel charging aperture diameter; Described deflector has a plurality of, is distributed in the circular passage of charging aperture opposite side, equate with the height of circular passage from the height of charging aperture deflector farthest, this farthest deflector and described end plate between form the blind area; One side of deflector and urceolus relative fixed, another side and inner core relative fixed, the angle α of deflector and described flash vessel barrel diameter direction is 0～30 degree; Described gusset places the top of circular passage, the barrel wall relative fixed of the side of gusset and described flash vessel, and the base of gusset and the top board of described circular passage are fixed.
6, as claim 4 or 5 described flash vessels, it is characterized in that the flat board that is shaped as of wherein said deflector, dull and stereotyped hypomere is a straight line, epimere is a camber line, the height h of straightway
1, h
2H
nChange from small to big successively, the length of arc is π R/2, and wherein R is 0.125～0.625 times of described flash vessel charging aperture diameter D, the distance H between deflector top and the described top board
1, H
2H
nSuccessively from large to small, H
1Be 0.9～0.1 times of described circular passage height, H
nBe zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201069297U CN201415064Y (en) | 2009-04-03 | 2009-04-03 | Flash evaporator used in chemical production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201069297U CN201415064Y (en) | 2009-04-03 | 2009-04-03 | Flash evaporator used in chemical production |
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| Publication Number | Publication Date |
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| CN201415064Y true CN201415064Y (en) | 2010-03-03 |
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| CN2009201069297U Expired - Lifetime CN201415064Y (en) | 2009-04-03 | 2009-04-03 | Flash evaporator used in chemical production |
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| CN (1) | CN201415064Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103127738A (en) * | 2013-02-18 | 2013-06-05 | 陕西科技大学 | Double-layer flash tank |
| CN103691211A (en) * | 2013-12-25 | 2014-04-02 | 中国石油化工股份有限公司 | Rotational-flow purifying device for gaseous product in fluidized-bed residual oil hydrogenation reactor and method for purifying gaseous product by same |
| CN106110696A (en) * | 2016-08-04 | 2016-11-16 | 兖矿水煤浆气化及煤化工国家工程研究中心有限公司 | The multifunctional evaporating equipment separated for thick product in oxo process class commercial plant |
| WO2018078924A1 (en) * | 2016-10-28 | 2018-05-03 | 株式会社ダイセル | Production method for acetic acid |
| CN108225729A (en) * | 2018-03-29 | 2018-06-29 | 榆林学院 | A kind of fine adjustment air and liquid twophase flow experiment platform |
| CN109179539A (en) * | 2018-09-30 | 2019-01-11 | 武汉格瑞拓机械有限公司 | Energy-efficient high-salt wastewater vaporising device and its processing method |
| US10266473B2 (en) | 2016-10-28 | 2019-04-23 | Daicel Corporation | Method for producing acetic acid |
| CN114058398A (en) * | 2020-08-07 | 2022-02-18 | 国家能源投资集团有限责任公司 | Online split-phase collection device and method for Fischer-Tropsch reaction products |
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2009
- 2009-04-03 CN CN2009201069297U patent/CN201415064Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103127738A (en) * | 2013-02-18 | 2013-06-05 | 陕西科技大学 | Double-layer flash tank |
| CN103691211A (en) * | 2013-12-25 | 2014-04-02 | 中国石油化工股份有限公司 | Rotational-flow purifying device for gaseous product in fluidized-bed residual oil hydrogenation reactor and method for purifying gaseous product by same |
| CN103691211B (en) * | 2013-12-25 | 2015-07-01 | 中国石油化工股份有限公司 | Rotational-flow purifying device for gaseous product in fluidized-bed residual oil hydrogenation reactor and method for purifying gaseous product by same |
| CN106110696B (en) * | 2016-08-04 | 2018-10-16 | 兖矿水煤浆气化及煤化工国家工程研究中心有限公司 | Multifunctional evaporating equipment in carbonylation synthesis class commercial plant for crude product separation |
| CN106110696A (en) * | 2016-08-04 | 2016-11-16 | 兖矿水煤浆气化及煤化工国家工程研究中心有限公司 | The multifunctional evaporating equipment separated for thick product in oxo process class commercial plant |
| TWI697476B (en) * | 2016-10-28 | 2020-07-01 | 日商大賽璐股份有限公司 | Method for producing acetic acid |
| JPWO2018078924A1 (en) * | 2016-10-28 | 2018-10-25 | 株式会社ダイセル | Method for producing acetic acid |
| US10266473B2 (en) | 2016-10-28 | 2019-04-23 | Daicel Corporation | Method for producing acetic acid |
| EP3333147B1 (en) | 2016-10-28 | 2019-07-10 | Daicel Corporation | Method for producing acetic acid |
| CN110214132A (en) * | 2016-10-28 | 2019-09-06 | 株式会社大赛璐 | The preparation method of acetic acid |
| WO2018078924A1 (en) * | 2016-10-28 | 2018-05-03 | 株式会社ダイセル | Production method for acetic acid |
| CN108225729A (en) * | 2018-03-29 | 2018-06-29 | 榆林学院 | A kind of fine adjustment air and liquid twophase flow experiment platform |
| CN108225729B (en) * | 2018-03-29 | 2023-11-14 | 榆林学院 | Accurate regulation gas-liquid two-phase flow experiment table |
| CN109179539A (en) * | 2018-09-30 | 2019-01-11 | 武汉格瑞拓机械有限公司 | Energy-efficient high-salt wastewater vaporising device and its processing method |
| CN114058398A (en) * | 2020-08-07 | 2022-02-18 | 国家能源投资集团有限责任公司 | Online split-phase collection device and method for Fischer-Tropsch reaction products |
| CN114058398B (en) * | 2020-08-07 | 2023-05-30 | 国家能源投资集团有限责任公司 | Online split-phase collecting device and method for Fischer-Tropsch reaction products |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 100095 Beijing city Haidian District P.Tricuspidata Road No. 7 Building No. 8 hospital Patentee after: Beijing Zehua Chemical Engineering Co., Ltd. Address before: 100085, Beijing, Haidian District on the four street, No. nine Rainbow Building, west of the three layer Patentee before: Beijing Zehua Chemical Engineering Co., Ltd. |
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| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Guangxi Kunda Bio Energy Co., Ltd. Assignor: Beijing Zehua Chemical Engineering Co., Ltd. Contract record no.: 2018450000006 Denomination of utility model: Flash evaporator used in chemical production Granted publication date: 20100303 License type: Common License Record date: 20180122 |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100303 |