CN112337125A - Film scraper of molecular distiller - Google Patents
Film scraper of molecular distiller Download PDFInfo
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- CN112337125A CN112337125A CN202011445337.5A CN202011445337A CN112337125A CN 112337125 A CN112337125 A CN 112337125A CN 202011445337 A CN202011445337 A CN 202011445337A CN 112337125 A CN112337125 A CN 112337125A
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- plate
- flow equalizing
- distillation
- equalizing plate
- wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/12—Molecular distillation
Abstract
The invention relates to the technical field of molecular distillation, in particular to a film scraper of a molecular distiller, which comprises: drive shaft, connecting rod, knifing mechanism, the setting of knifing is in the inside of distillation column, the knifing mechanism includes: the invention relates to a liquid material distillation device, which comprises a flow equalizing plate, an air bag strip, a positioning plate, a rotating shaft and a bottom plate, wherein one end of the flow equalizing plate is vertically and fixedly connected with one end of a connecting rod, which is close to the inner wall of a distillation barrel, the other end of the flow equalizing plate is vertically downward, the flow equalizing plate is not contacted with the inner wall of the distillation barrel, so that the mechanical friction between the flow equalizing plate and the inner wall of the distillation barrel is avoided, meanwhile, the flow equalizing plate can push and scrape liquid materials into a thick liquid film, a liquid guide groove is formed in one surface of the flow equalizing plate, which faces the inner wall of the distillation barrel, and forms a certain inclination angle with the motion direction of the flow equalizing plate, and the liquid guide groove can make the liquid materials forcibly move downwards along the track of the liquid guide groove.
Description
Technical Field
The invention relates to the technical field of molecular distillation, in particular to a film scraper of a molecular distiller.
Background
Molecular distillation, also known as short-path distillation, is a liquid-liquid separation technique carried out under vacuum conditions, has the characteristics of low distillation temperature, high vacuum degree, short thermal contact time, high separation degree and the like, and is particularly suitable for separating high-boiling-point, heat-sensitive and easily-decomposed substances. The basic principle of molecular distillation is that a liquid material is forced to form a film on a hot surface by a mechanical device, usually a rotary film scraper, and light components in the material are heated and evaporated, escape from the hot surface and are captured by a cold surface; the separation of the liquid material is achieved by a membrane scraper and the raffinate (heavy components) is rapidly removed from the hot surface.
Ideally, the rotating wiper should be perfectly coaxial with the cylindrical hot surface, and both perfectly cylindrical. In this way, the outer edge of the scraper fixed to the scraper can be kept physically free from contact with the hot surface of the inner wall of the retort and with a constant clearance (typically in the order of submillimeters). However, such an ideal configuration is not realized in industrial practice. This is because any true cylinder is out of roundness and is limited by machining accuracy, and the two devices cannot be perfectly coaxial. In addition, mechanical stress deformation, thermal expansion deformation, thermal stress deformation, centrifugal force, bearing clearance, mechanical vibration and other factors can cause the outer edge of the scraper and the hot surface of the inner wall of the steamer to be incapable of keeping constant clearance or even to be in physical contact. In view of these factors, it is often necessary to increase the clearance to avoid mechanical contact between the blade and the hot surface. However, increasing the gap will result in the formation of a thick film, reducing the evaporation efficiency. In addition, the gap between the scraper and the hot surface is also not constant during rotation, resulting in uneven film thickness and affecting evaporation efficiency. Meanwhile, during the rotation process, the scraper usually generates friction due to direct mechanical contact with a hot surface, so that impurities are introduced in the material separation process.
The scraper on the film scraper generally needs to be replaced by a new scraper after being used for a period of time, and the existing scraper is usually fixedly connected in order to maintain the stability of the scraper in rotation, so that the scraper is inconvenient to replace.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to solve the problems of uneven film thickness and inconvenience in blade replacement. The invention realizes the purpose by the following technical scheme:
a wiper for a molecular still, comprising: the device comprises a driving shaft, connecting rods and a film scraping mechanism, wherein the film scraping device is arranged inside a distillation barrel, the upper end of the driving shaft penetrates through an upper cover of the distillation barrel and is mechanically connected with a motor shaft of a motor, the driving shaft can rotate under the driving of the motor, the driving shaft is coaxial with the distillation barrel, a plurality of connecting rods are arranged at equal angles at the lower end of the driving shaft along the circumferential direction of the driving shaft, each connecting rod is connected with one film scraping mechanism, the film scraping mechanism is vertically positioned between the distillation barrel and a condenser and is close to the inner wall of the distillation barrel, and the film scraping mechanism is used for scraping materials on the inner wall of;
the film scraping mechanism comprises: the liquid material is pushed and scraped into a thick liquid film by the flow equalizing plate, one surface of the flow equalizing plate, which faces the inner wall of the distillation barrel, is provided with a liquid guide groove, the liquid guide groove and the motion direction of the flow equalizing plate form a certain inclination angle, and the liquid guide groove can make the liquid material forcibly move downwards along the track of the liquid guide groove;
one end, close to the connecting rod, of the left side face of the flow equalizing plate is connected with a first clamping plate, the first clamping plate is perpendicular to the flow equalizing plate, the bottom face of the flow equalizing plate is fixedly connected with the bottom plate, the bottom plate is in a horizontal state and is not in contact with the inner wall of the distillation barrel, the rotating shaft is vertically fixed on the bottom plate and is located below the first clamping plate, and the positioning plate is rotatably installed on the rotating shaft and is not in contact with the inner wall of the distillation barrel.
One end, close to the rotating shaft, of the right side surface of the positioning plate is connected with a second clamping plate, and when the positioning plate is parallel to the flow equalizing plate, the second clamping plate is parallel to the first clamping plate and does not contact with the first clamping plate.
A C-shaped clamping groove is formed between the positioning plate and the flow equalizing plate, and the lengths of the flow equalizing plate, the first clamping plate, the positioning plate and the second clamping plate are consistent in the axial direction;
the air bag strip is composed of an air bag part and an installation part, the shape of the air bag strip is matched with the shape of a clamping groove formed when the positioning plate is parallel to the flow equalizing plate under normal atmospheric pressure, the air bag strip is installed in the clamping groove and is not contacted with the inner wall of the distillation barrel, the air bag part is positioned between the positioning plate and the flow equalizing plate, the installation part is positioned between the first clamping plate and the second clamping plate, the air bag strip can be directly inserted into or pulled out of the clamping groove without complex operation when being installed and removed, as shown in the figure, when the air bag strip is in a vacuum environment, the air bag part can expand and deform, the positioning plate is driven by the air bag part to rotate along the rotating shaft during deformation, the first clamping plate moves to enable the first clamping plate and the second clamping plate to tightly clamp the installation part, the air bag strip can be prevented from moving, and the air bag part can only deform to the inner wall of, and finally, the liquid film is fully attached to the inner wall of the distillation barrel, so that the thick liquid film can be drawn into a uniform liquid film, the liquid film not only avoids the direct contact between the air bag strip and the hot surface, but also has a lubricating effect, and the abrasion caused by the friction between the air bag strip and the distillation barrel is prevented.
The invention has the beneficial effects that:
the air bag part can only deform towards the inner wall of the distillation cylinder under the action of the positioning plate, the flow equalizing plate and the clamping plate I in a vacuum state and is finally fully attached to the inner wall of the distillation cylinder, so that the thick liquid film can be pulled into a uniform liquid film, the liquid film not only avoids the direct contact of the air bag strip and the hot surface, but also has a lubricating effect, thereby preventing the abrasion caused by the friction of the air bag strip and the distillation cylinder, prolonging the service life, and when various factors cause the rotating film scraper to be not coaxial with the hot cylindrical surface, the air bag strip is fully attached to the inner wall of the distillation cylinder all the time, and ensuring that the pulled film is uniform all the time.
Utilize gasbag portion of gasbag strip inflation deformation under the evacuation state, make the locating plate along the pivot rotation and drive cardboard two to cardboard one displacement, make cardboard one with two tight installation departments of cliping, and the right side part of gasbag portion can inlay the drain ditch inslot that advances the equalizer plate, make the firm installation in the draw-in groove of gasbag strip, the installation, when demolising the gasbag strip, only need open the distillation column, make its inside under normal atmospheric pressure, this moment directly insert the gasbag strip or take the draw-in groove out can, convenient operation is swift.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a top view of the present invention installed inside a distillation column.
Fig. 3 is a partially enlarged schematic view of fig. 2.
FIG. 4 is a top view of the wiping mechanism of the present invention without the airbag strip installed.
FIG. 5 is a schematic view of the construction of the airbag strip of the present invention.
Fig. 6 is a schematic structural view of the flow equalizing plate of the present invention.
Fig. 7 is a plan view of the wiping mechanism of the present invention in a state where a vacuum is drawn in the distillation column.
Description of the drawings:
1. a distillation column; 2. a condenser; 10. a drive shaft; 20. a connecting rod; 30. a film scraping mechanism; 31. a flow equalizing plate; 311. a drainage groove; 312. a first clamping plate; 32. an air bag strip; 321. an air bag portion; 322. an installation part; 33. positioning a plate; 331. a second clamping plate; 34. a rotating shaft; 35. a base plate; 36. a clamping groove.
Detailed Description
Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those embodiments can be easily implemented by those having ordinary skill in the art to which the present invention pertains. However, the present invention may be embodied in many different forms and is not limited to the embodiments described below. In addition, in order to more clearly describe the present invention, components not connected to the present invention will be omitted from the drawings.
As shown in fig. 1-2, a film scraper of a molecular still comprises: the device comprises a driving shaft 10, connecting rods 20 and a film scraping mechanism 30, wherein the film scraper is arranged inside a distillation barrel 1, the upper end of the driving shaft 10 penetrates through an upper cover (not shown in the figure) of the distillation barrel 1 and is mechanically connected with a motor shaft of a motor (not shown in the figure), the driving shaft 10 can rotate under the driving of the motor, the driving shaft 10 is coaxial with the distillation barrel 1, a plurality of connecting rods 20 are arranged at equal angles along the circumferential direction of the lower end of the driving shaft 10, each connecting rod 20 is connected with one film scraping mechanism 30, the film scraping mechanisms 30 are vertically positioned between the distillation barrel 1 and a condenser 2 and are close to the inner wall of the distillation barrel 1, and the film scraping mechanisms 30 are used for scraping materials on the inner wall of the distillation;
as shown in fig. 3 and 6, the film scraping mechanism 30 includes: the device comprises a flow equalizing plate 31, an air bag strip 32, a positioning plate 33, a rotating shaft 34 and a bottom plate 35, wherein one end of the flow equalizing plate 31 is vertically and fixedly connected with one end of a connecting rod 20 close to the inner wall of the distillation barrel 1, the other end of the flow equalizing plate is vertically downward, the flow equalizing plate 31 is not contacted with the inner wall of the distillation barrel 1, the mechanical friction between the flow equalizing plate 31 and the inner wall of the distillation barrel 1 is avoided, meanwhile, the flow equalizing plate 31 can also push and scrape liquid materials into a thick liquid film, a liquid guide groove 311 is formed in one surface of the flow equalizing plate 31 facing the inner wall of the distillation barrel 1, the liquid guide groove 311 and the flow equalizing plate 31 are at a certain inclination angle in the motion direction, and the liquid guide;
by adjusting the inclination angle of the liquid guide groove 311, the retention time of the liquid material on the wall of the distillation cylinder can be adjusted, the liquid holdup is increased, the liquid on the evaporation surface is better mixed and distributed, the mixing temperature and the concentration gradient of the liquid are balanced, the transfer of heat and mass is enhanced, the inclination angle of the liquid guide groove 311 is adjusted, the evaporation requirement of the liquid material with different viscosities can be met, and the liquid guide groove 311 is particularly favorable for mass transfer of the high-viscosity material;
as shown in fig. 3 and 4, one end of the left side surface of the flow equalizing plate 31, which is close to the connecting rod 20, is connected with a first clamping plate 312, the first clamping plate 312 is perpendicular to the flow equalizing plate 31, the bottom surface of the flow equalizing plate 31 is fixedly connected with a bottom plate 35, the bottom plate 35 is in a horizontal state and is not in contact with the inner wall of the distillation column 1, and the rotating shaft 34 is vertically fixed on the bottom plate 35 and is located at the lower left side of the first clamping plate 312;
the positioning plate 33 is rotatably installed on the rotating shaft 34 and is not contacted with the inner wall of the distillation barrel 1, one end, close to the rotating shaft 34, of the right side surface of the positioning plate 33 is connected with a second clamping plate 331, when the positioning plate 33 is parallel to the flow equalizing plate 31, the second clamping plate 331 is parallel to the first clamping plate 312 and is not contacted with the first clamping plate, a C-shaped clamping groove 36 is formed between the positioning plate 33 and the flow equalizing plate 31, and the lengths of the flow equalizing plate 31, the first clamping plate 312, the positioning plate 33 and the second clamping plate 331 are consistent in the axial direction;
as shown in fig. 3 and 5, the airbag strip 32 is composed of an airbag portion 321 and an installation portion 322, and under normal atmospheric pressure, the shape of the airbag strip matches with the shape of a slot 36 formed when the positioning plate 33 is parallel to the flow equalizing plate 31, the airbag strip 32 is installed in the slot 36 and does not contact with the inner wall of the distillation column 1, wherein the airbag portion 321 is located between the positioning plate 33 and the flow equalizing plate 31, and the installation portion 322 is located between the first clamping plate 312 and the second clamping plate 331, so that the airbag strip 32 can be directly inserted into or pulled out of the slot 36 without complex operations when being installed and removed;
as shown in fig. 7, when the air bag strip 32 is in a vacuum-pumping environment, the air bag portion 321 expands and deforms, and when the air bag portion 321 deforms, the air bag portion 321 drives the positioning plate 33 to rotate along the rotating shaft 34, and the clamping plate two 331 moves towards the clamping plate one 312, so that the clamping plate one 312 and the clamping plate two 331 tightly clamp the installation portion 322, and the air bag strip 32 can be prevented from moving, and meanwhile, the air bag portion 321 can only deform towards the inner wall of the distillation barrel 1 under the action of the positioning plate 33, the flow equalizing plate 31 and the clamping plate one 312, and is finally fully attached to the inner wall of the distillation barrel 1, so that the thick liquid film can be pulled into a uniform liquid film, and the liquid film not only avoids the direct contact between the air bag strip 32 and a hot surface, but also has a lubricating effect, and thereby preventing the abrasion caused by the friction between;
generally, the thinner the thickness of the liquid film formed on the hot surface of the distillation column 1 is, the smaller the thermal resistance of the liquid film is, so that the lower the temperature of heat supply to the hot surface required for evaporating the light components can be, the lower the probability of material decomposition by heat is, and when various factors cause the rotating film scraper to be not coaxial with the cylindrical hot surface, the air bag strip 32 is always fully attached to the inner wall of the distillation column 1, so as to ensure that the pulled film is always uniform, and meanwhile, when the air bag part 321 expands and deforms, the right part of the air bag part is clamped into the liquid guide groove 311 of the flow equalization plate 31, so that the air bag strip 32 can be further prevented from sliding in the clamping groove 36.
The working principle of the invention is as follows:
firstly, heating a distillation cylinder 1 through a heating jacket to enable the inner wall to reach a set temperature, operating a vacuum pump to enable the inner cavity of a distiller to reach a set vacuum degree, expanding and deforming an air bag part 321 of an air bag strip 32 at the moment, driving a positioning plate 33 to rotate along a rotating shaft 34 by the air bag part 321 to enable a first clamping plate 312 and a second clamping plate 331 to tightly clamp an installation part 322, enabling the air bag part 321 to only deform towards the inner wall of the distillation cylinder 1 under the action of the positioning plate 33, a flow equalizing plate 31 and the first clamping plate 312 and to be finally fully attached to the inner wall of the distillation cylinder 1, starting a condenser 2 to enable a condensation area to reach a preset temperature, starting a film scraper, injecting liquid materials into the inner wall of the distillation cylinder 1, and enabling the liquid materials to flow downwards along the inner wall of the distillation cylinder;
starting a motor, driving the film scraping mechanism 30 to rotate, wherein when the film scraping mechanism 30 rotates, the current equalizing plate 31 is not contacted with the inner wall of the distillation barrel 1, the air bag part 321 of the air bag strip 32 is attached to the inner wall of the distillation barrel 1, when liquid materials enter the inner wall of the distillation barrel 1, the liquid materials pass through the current equalizing plate 31 to form a liquid thick film state, the liquid materials in the liquid thick film state pass through the air bag part 321 of the air bag strip 32 to form a liquid thin film, the continuous rotation of the film scraping mechanism 30 maintains the liquid materials in the liquid thin film state, the heated distillation barrel 1 heats the liquid thin film on the inner wall, then light components volatilized from the inner wall of the distillation barrel 1 are gathered to the surface of the nearby built-in condenser 2 and condensed, and distillate is collected at the bottom of the condenser 2;
the heavy component which is not evaporated flows downwards along the inner wall of the distillation cylinder 1 under the action of the gravity of the heavy component and the driving of the film scraping mechanism 30, and is discharged through the bottom of the distiller, when the air bag strips 32 need to be installed, the interior of the distillation cylinder 1 is opened, the positioning plate 33 is made to be parallel to the flow equalizing plate 31, then the air bag strips 32 are directly inserted into the clamping grooves 36, when the air bag strips 32 need to be detached, the interior of the distillation cylinder 1 is opened, the interior of the distillation cylinder is made to be at normal atmospheric pressure, and then the air bag strips 32 are directly pulled out of the clamping grooves 36.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; they may be mechanically coupled, directly coupled, or indirectly coupled through intervening agents, both internally and/or in any other manner known to those skilled in the art. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A wiper for a molecular still, comprising: the device comprises a driving shaft (10), connecting rods (20) and a film scraping mechanism (30), wherein the film scraping mechanism (30) is arranged inside a distillation barrel (1), the upper end of the driving shaft (10) penetrates through an upper cover of the distillation barrel (1) and is mechanically connected with a motor shaft of a motor, the driving shaft (10) is coaxial with the distillation barrel (1), a plurality of connecting rods (20) are arranged at equal angles along the circumferential direction of the lower end of the driving shaft (10), each connecting rod (20) is connected with one film scraping mechanism (30), and each film scraping mechanism (30) is vertically positioned between the distillation barrel (1) and a condenser (2) and is close to the inner wall of the distillation barrel (1);
the method is characterized in that: the film scraping mechanism (30) comprises: the distillation column comprises a flow equalizing plate (31), an air bag strip (32), a positioning plate (33), a rotating shaft (34) and a bottom plate (35), wherein one end of the flow equalizing plate (31) is vertically and fixedly connected with one end, close to the inner wall of the distillation column (1), of a connecting rod (20), the other end of the flow equalizing plate (31) is vertically downward, one end, close to the connecting rod (20), of the left side surface of the flow equalizing plate (31) is connected with a first clamping plate (312), and the first clamping plate (312) and the flow equalizing plate (31) are vertically arranged;
the bottom surface of the flow equalizing plate (31) is fixedly connected with one side of the bottom plate (35), the bottom plate (35) is in a horizontal state and is not in contact with the inner wall of the distillation cylinder (1), the rotating shaft (34) is vertically fixed on the bottom plate (35) and is positioned at the lower left of the clamping plate I (312), and the positioning plate (33) is rotatably arranged on the rotating shaft (34) and is not in contact with the inner wall of the distillation cylinder (1).
2. The molecular still scraper of claim 1, wherein: one end of the right side surface of the positioning plate (33), which is close to the rotating shaft (34), is connected with a second clamping plate (331), and the second clamping plate (331) and the positioning plate (33) are vertically arranged.
3. The molecular still scraper of claim 2, wherein: a C-shaped clamping groove (36) is formed between the positioning plate (33) and the flow equalizing plate (31).
4. The molecular still scraper of claim 1, wherein: the air bag strip (32) is composed of an air bag part (321) and an installation part (322), the shape of the air bag part (321) is matched with the shape of the clamping groove (36), the air bag strip (32) is installed in the clamping groove (36) and is not contacted with the inner wall of the distillation barrel (1), the air bag part (321) is located between the positioning plate (33) and the flow equalizing plate (31), and the installation part (322) is located between the first clamping plate (312) and the second clamping plate (331).
5. The molecular still scraper of claim 1, wherein: one surface of the flow equalizing plate (31) facing the inner wall of the distillation barrel (1) is provided with a liquid guiding groove (311), and the liquid guiding groove (311) and the movement direction of the flow equalizing plate (31) form a certain inclination angle.
6. The molecular still scraper of claim 2, wherein: the lengths of the flow equalizing plate (31), the first clamping plate (312), the positioning plate (33) and the second clamping plate (331) in the axial direction are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011445337.5A CN112337125A (en) | 2020-12-08 | 2020-12-08 | Film scraper of molecular distiller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011445337.5A CN112337125A (en) | 2020-12-08 | 2020-12-08 | Film scraper of molecular distiller |
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| Publication Number | Publication Date |
|---|---|
| CN112337125A true CN112337125A (en) | 2021-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011445337.5A Pending CN112337125A (en) | 2020-12-08 | 2020-12-08 | Film scraper of molecular distiller |
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| Country | Link |
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| CN (1) | CN112337125A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915565A (en) * | 2021-03-04 | 2021-06-08 | 安徽金禾实业股份有限公司 | Rotary continuous production equipment and production method for sucrose-6-ester |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201445820U (en) * | 2009-07-31 | 2010-05-05 | 佛山汉维机电科技有限公司 | Film scraping device for film scraping type molecular distiller |
| CN106552438A (en) * | 2015-09-29 | 2017-04-05 | 亚申科技研发中心（上海）有限公司 | Molecular still |
| CN206597328U (en) * | 2017-03-09 | 2017-10-31 | 上海中真润滑油有限公司 | A kind of molecular still adjustable scrapping plate |
-
2020
- 2020-12-08 CN CN202011445337.5A patent/CN112337125A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201445820U (en) * | 2009-07-31 | 2010-05-05 | 佛山汉维机电科技有限公司 | Film scraping device for film scraping type molecular distiller |
| CN106552438A (en) * | 2015-09-29 | 2017-04-05 | 亚申科技研发中心（上海）有限公司 | Molecular still |
| CN206597328U (en) * | 2017-03-09 | 2017-10-31 | 上海中真润滑油有限公司 | A kind of molecular still adjustable scrapping plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112915565A (en) * | 2021-03-04 | 2021-06-08 | 安徽金禾实业股份有限公司 | Rotary continuous production equipment and production method for sucrose-6-ester |
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Application publication date: 20210209 |
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