CN216223008U - Separation and purification device at initial esterification stage in glyceryl triacetate preparation process - Google Patents
Separation and purification device at initial esterification stage in glyceryl triacetate preparation process Download PDFInfo
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- CN216223008U CN216223008U CN202122869676.2U CN202122869676U CN216223008U CN 216223008 U CN216223008 U CN 216223008U CN 202122869676 U CN202122869676 U CN 202122869676U CN 216223008 U CN216223008 U CN 216223008U
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Abstract
The utility model discloses a separation and purification device at the initial esterification stage in the preparation process of glyceryl triacetate, which comprises a reduced pressure distillation unit, a filtering unit and a control panel, wherein the reduced pressure distillation unit comprises a distillation tower, a vacuum suction pump, an electric heating pipe and a stirring device, and the filtering unit consists of a first-stage filtering device, a second-stage filtering device and a third-stage filtering device; according to the utility model, the vacuum distillation unit and the control panel are arranged, so that the separation and purification treatment of the glyceryl triacetate can be rapidly carried out, each element is connected and controlled with the control panel, the working efficiency of the equipment and the separation and purification effects are greatly improved, and the filtration unit is arranged, so that the multiple-stage filtration and adsorption treatment can be carried out on the glyceryl triacetate after vacuum distillation, and the separation and purification effects of the glyceryl triacetate are further improved.
Description
Technical Field
The utility model relates to the technical field of separation and purification, in particular to a separation and purification device for an initial esterification stage in a glyceryl triacetate preparation process.
Background
Glyceryl triacetate is a colorless odorless oily liquid, slightly soluble in water, and readily soluble in alcohols, ethers, and other organic solvents. The boiling point is usually in the range of 258-260 ℃, has no toxicity or irritation, has good gelation effect and physiological inertia, and is mainly used as a plasticizer of an acetate fiber filter tip for a cigarette filter tip, a fixed aromatic agent of spice and essence, a nontoxic plasticizer for cosmetics manufacture, edible gum base products manufacture, special solvents and food plastic products, a curing agent for casting resin and the like. The plasticizer is mainly used as an adhesive plasticizer of cigarette filters in China, the market demand of the plasticizer is increased year by year, and the application prospect is wide.
It has been widely used in industrial production for a long time to synthesize and prepare a fine chemical product, namely glyceryl triacetate, by using glycerol and glacial acetic acid as raw materials, concentrated sulfuric acid as a catalyst and benzene or toluene as a water-carrying agent. In the esterification process, the concentrated sulfuric acid is easy to generate side reactions such as dehydration, oxidation, self-esterification and the like, so that the target product contains impurities such as ether, carbon compounds, sulfuric ester and the like, and the product becomes a black viscous oily liquid which has strong sour taste and is similar to petroleum. Meanwhile, due to the fact that the esterification capacities of primary hydroxyl groups and secondary hydroxyl groups in the glycerol structure are different, a certain amount of impurity components such as monoacetin, diacetin and the like inevitably exist in a target product. The quality of the cigarette filter tip is directly determined by the purity of the cigarette triacetin, so that the smoking quality of the cigarette and the harm degree of toxic smoke in the tobacco to human health are influenced.
Disclosure of Invention
In order to solve the problems, the utility model provides a separation and purification device with good separation and purification effects at the initial esterification stage in the preparation process of glyceryl triacetate.
In order to achieve the purpose, the utility model adopts the following technical scheme: the separation and purification device comprises a reduced pressure distillation unit, a filtering unit and a control panel, wherein the control panel is arranged on one side of the reduced pressure distillation unit.
The vacuum distillation unit includes distillation column, vacuum suction pump, electric heating pipe and agitating unit, the tower body of distillation column is sandwich structure, electric heating pipe encircles and sets up in the intermediate layer, electric heating pipe passes through the wire and is connected with control panel, the bottom below of distillation column is equipped with the support, bottom mid point department is equipped with the discharging pipe, be equipped with ejection of compact solenoid valve on the discharging pipe, ejection of compact solenoid valve passes through the wire and is connected with control panel, the upper portion outer peripheral face of distillation column is equipped with the inlet pipe, be equipped with the feeding solenoid valve on the inlet pipe, the feeding solenoid valve passes through the wire and is connected with the controller, be equipped with the outlet duct on the distillation column side relative with the inlet pipe, be equipped with the relief pressure valve on the outlet duct, the end of outlet duct is equipped with the collecting box, be equipped with temperature sensor in the distillation column, temperature sensor passes through the wire and is connected with control panel.
The stirring device is composed of a stirring motor and a stirring shaft, the stirring motor is arranged above the top end of the distillation tower and is connected with the control panel through a wire, one end of the stirring shaft is connected with a rotating shaft of the stirring motor, the other end of the stirring shaft penetrates into the distillation tower, and the part of the stirring shaft in the distillation tower is provided with a spiral stirring blade.
The vacuum suction pump is arranged on the left side of the distillation tower and is connected with the control panel through a lead, a supporting platform is arranged below the vacuum suction pump, the vacuum suction pump is communicated with the inside of the distillation tower through a suction pipe, a barometer is further arranged in the distillation tower, and the barometer is connected with the controller through a lead.
The filter unit comprises primary filter device, secondary filter device and tertiary filter device, the primary filter device includes primary filter case and one-level filter, and the primary filter roof be open structure, and the open-top department is equipped with sealed lid, and the left end face upper portion of primary filter case is equipped with the feed inlet, and put through mutually with the discharging pipe of distillation tower bottom, and right-hand member face lower part is equipped with the discharge gate, the one-level filter is the active carbon filter, and the quantity of one-level filter is a plurality of pieces, and the equidistance sets up in the box of primary filter case in proper order.
The second grade filter equipment includes second grade rose box and second grade filter hopper, the second grade rose box sets up on the right side of first grade rose box, and the left end face upper portion of second grade rose box has been seted up the feed inlet, and this feed inlet passes through the connecting pipe to be connected with the discharge gate of first grade rose box, and the bottom surface is equipped with the discharge gate, be equipped with the milipore filter on the inner wall of second grade filter hopper, the quantity of second grade filter hopper is two, vertical setting in proper order is in the rose box, and the bottom of top filter hopper is equipped with the conveying pipeline, and the discharge gate of conveying pipeline is located the lateral wall of below filter hopper.
Tertiary filter equipment includes tertiary filter box and electro-magnet stick, tertiary filter box sets up on second grade filter box right side, and tertiary filter box's left end face upper portion has been seted up the feed inlet, and this feed inlet passes through the connecting pipe to be connected with second grade filter box's discharge gate, and right-hand member face lower part is equipped with the discharge gate, and tertiary filter box's top surface is open structure, and the opening part is equipped with sealed lid, the quantity of electro-magnet stick is a plurality of, and the equidistance setting is in the bottom of sealed lid, and is connected with control panel through the wire.
Preferably, in order to guarantee the filter effect, one side of tertiary filter case is equipped with the setting tank, the right-hand member face upper portion of setting tank has been seted up there is the feed inlet, and this feed inlet passes through the connecting pipe to be connected with tertiary filter case's discharge gate, and the left end face lower part is equipped with the discharging pipe, and is equipped with the valve on the discharging pipe, and the bottom is equipped with the pipe of slagging tap, equally is equipped with the valve on the pipe of slagging tap.
Preferably, in order to prevent the distillation tower from burning personnel during distillation, a heat insulation layer is arranged outside the distillation tower.
The working principle is as follows: during the use, in the triacetin after will just esterifying added the distillation column, control vacuum suction pump sucks in to the distillation column, the barometer changes the atmospheric pressure in the distillation column in real time and transmits control panel, when atmospheric pressure in the distillation column reaches required atmospheric pressure, control panel control electric heating pipe work heating, control agitator motor work simultaneously stirs solution and accelerates heating efficiency, temperature sensor monitors the temperature in the distillation column, guarantee that its heating temperature is not higher than the boiling point of triacetin, and the boiling point is less than the impurity of triacetin and is evaporated and rises to the top in the tower, when the tower internal pressure reaches the critical value, back open the interior relief pressure valve of trachea, in impurity fraction and the steam rush out the distillation column, enter into the collection box.
After the vacuum distillation is accomplished, discharge solenoid valve is opened to control panel, solution enters into the one-level filter case, solution carries out the filtration absorption back for the first time through each one-level filter in proper order, continue to advance to the second grade filter case in, solution carries out the secondary filter along the inner wall flow of second grade filter hopper and adsorbs, then, solution reaches in the tertiary filter case, at this moment, begin to energize for the electro-magnet stick, electromagnetic elevator iron plate adsorbs the magnetic impurities in the solution, solution enters into the setting tank at last and deposits and places.
Has the advantages that: the utility model can quickly separate and purify the glyceryl triacetate by arranging the reduced pressure distillation unit and the control panel, and each element is connected and controlled with the control panel, thereby greatly improving the working efficiency of equipment and the separation and purification effects.
And secondly, by arranging the filtering unit, the glycerol triacetate after reduced pressure distillation can be subjected to multiple and multistage filtering and adsorption treatment, so that the separation and purification effects of the glycerol triacetate are further improved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic view of the structure of a vacuum distillation unit according to the present invention.
FIG. 3 is a schematic view of the structure of the filter unit of the present invention.
In the figure: 1. a control panel; 2. a distillation column; 3. a vacuum suction pump; 4. an electric heating tube; 5. a collection box; 6. a stirring motor; 7. a stirring shaft; 8. a temperature sensor; 9. a barometer; 10. a primary filter tank; 11. a first-stage filter plate; 12. a secondary filter tank; 13. a secondary filter hopper; 14. a third stage filter box; 15. an electromagnet rod; 16. a settling tank.
Detailed Description
The utility model is further illustrated with reference to the following figures and examples.
Example 1
As shown in fig. 1-3, a separation and purification apparatus for the initial esterification stage in the preparation process of triacetin, comprises a reduced pressure distillation unit, a filtration unit and a control panel 1, wherein the control panel 1 is arranged at one side of the reduced pressure distillation unit.
The reduced pressure distillation unit comprises a distillation tower 2, a vacuum suction pump 3, an electric heating pipe 4 and a stirring device, the tower body of the distillation tower 2 is of a sandwich structure, the electric heating pipe 4 is arranged in the sandwich layer in a surrounding way, the electric heating pipe 4 is connected with the control panel 1 through a lead, a bracket is arranged below the bottom of the distillation tower 2, a discharging pipe is arranged at the midpoint of the bottom, a discharging electromagnetic valve is arranged on the discharging pipe and is connected with the control panel 1 through a lead, a feeding pipe is arranged on the outer peripheral surface of the upper part of the distillation tower 2, a feeding electromagnetic valve is arranged on the feeding pipe and is connected with a controller through a lead, the side surface of the distillation tower 2 opposite to the feeding pipe is provided with an air outlet pipe, the air outlet pipe is provided with a pressure reducing valve, the tail end of the air outlet pipe is provided with a collecting box 5, and a temperature sensor 8 is arranged in the distillation tower 2, and the temperature sensor 8 is connected with the control panel 1 through a lead.
Agitating unit comprises agitator motor 6 and (mixing) shaft 7, agitator motor 6 sets up in the top of distillation column 2 top, and agitator motor 6 passes through the wire and is connected with control panel 1, the one end of (mixing) shaft 7 is connected with agitator motor 6's pivot, and inside the other end penetrated distillation column 2, the part that (mixing) shaft 7 is located distillation column 2 was equipped with spiral stirring vane.
The filter unit comprises level filtering device, secondary filter and tertiary filter, level filtering device includes level filtering case 10 and level filtering board 11, and level filtering case 10 top be open structure, and the open-top department is equipped with sealed lid, and level filtering case 10's left end face upper portion is equipped with the feed inlet, and put through mutually with the discharging pipe of 2 bottoms of distillation column, and right end face lower part is equipped with the discharge gate, level filtering board 11 is the active carbon filter, and the quantity of level filtering board 11 is a plurality of pieces, and the equidistance sets up in the box of level filtering case 10 in proper order.
The second grade filter equipment includes second grade rose box 12 and second grade filter hopper 13, second grade rose box 12 sets up on the right side of one-level rose box 10, and the left end face upper portion of second grade rose box 12 has seted up the feed inlet, and this feed inlet passes through the connecting pipe to be connected with the discharge gate of one-level rose box 10, and the bottom surface is equipped with the discharge gate, be equipped with the milipore filter on the inner wall of second grade filter hopper 13, the quantity of second grade filter hopper 13 is two, vertical setting in the rose box in proper order, and the bottom of top filter hopper is equipped with the conveying pipeline, and the discharge gate of conveying pipeline is located the lateral wall of below filter hopper.
Tertiary filter equipment includes 14 casees of tertiary filter case and electro-magnet stick 15, tertiary filter case 14 sets up on the 12 right sides of secondary filter case, and the left end face upper portion of tertiary filter case 14 has been seted up the feed inlet, and this feed inlet passes through the connecting pipe to be connected with the discharge gate of secondary filter case 12, and right-hand member face lower part is equipped with the discharge gate, and tertiary filter case 14's top surface is open structure, and the opening part is equipped with sealed lid, the quantity of electro-magnet stick 15 is a plurality of, and the equidistance sets up in the bottom of sealed lid, and is connected with control panel 1 through the wire.
Example 2
The specific implementation is as in example 1, except that: one side of tertiary rose box 14 is equipped with setting tank 16, the feed inlet has been seted up on setting tank 16's right-hand member face upper portion, and this feed inlet passes through the connecting pipe to be connected with tertiary rose box 14's discharge gate, and left end face lower part is equipped with the discharging pipe, and is equipped with the valve on the discharging pipe, and the bottom is equipped with the pipe of slagging tap, equally is equipped with the valve on the pipe of slagging tap.
And a heat insulation layer is arranged outside the distillation tower 2.
Claims (3)
1. A separation and purification device for an initial esterification stage in a glyceryl triacetate preparation process comprises a reduced pressure distillation unit, a filtering unit and a control panel (1), wherein the control panel (1) is arranged on one side of the reduced pressure distillation unit; the method is characterized in that: the vacuum distillation unit comprises a distillation tower (2), a vacuum suction pump (3), an electric heating pipe (4) and a stirring device, the tower body of the distillation tower (2) is of an interlayer structure, the electric heating pipe (4) is arranged in an interlayer in a surrounding manner, the electric heating pipe (4) is connected with a control panel (1) through a wire, a support is arranged below the bottom of the distillation tower (2), a discharging pipe is arranged at the midpoint of the bottom, a discharging electromagnetic valve is arranged on the discharging pipe and connected with the control panel (1) through a wire, an inlet pipe is arranged on the outer peripheral face of the upper part of the distillation tower (2), a feeding electromagnetic valve is arranged on the inlet pipe and connected with a controller through a wire, an outlet pipe is arranged on the side face of the distillation tower (2) opposite to the inlet pipe, a pressure reducing valve is arranged on the outlet pipe, a collecting box (5) is arranged at the tail end of the outlet pipe, a temperature sensor (8) is arranged in the distillation tower (2), the temperature sensor (8) is connected with the control panel (1) through a lead;
the stirring device consists of a stirring motor (6) and a stirring shaft (7), the stirring motor (6) is arranged above the top end of the distillation tower (2), the stirring motor (6) is connected with the control panel (1) through a lead, one end of the stirring shaft (7) is connected with a rotating shaft of the stirring motor (6), the other end of the stirring shaft penetrates into the distillation tower (2), and a spiral stirring blade is arranged on the part of the stirring shaft (7) positioned in the distillation tower (2);
the vacuum suction pump (3) is arranged on the left side of the distillation tower (2), the vacuum suction pump (3) is connected with the control panel (1) through a lead, a supporting platform is arranged below the vacuum suction pump (3), the vacuum suction pump (3) is communicated with the interior of the distillation tower (2) through a suction pipe, a barometer (9) is further arranged in the distillation tower (2), and the barometer (9) is connected with a controller through a lead;
the filter unit consists of a primary filter device, a secondary filter device and a tertiary filter device, wherein the primary filter device comprises a primary filter box (10) and a primary filter plate (11), the top of the primary filter box (10) is of an open structure, a sealing cover is arranged at the opening of the top of the primary filter box, a feed inlet is formed in the upper part of the left end face of the primary filter box (10) and communicated with a discharge pipe at the bottom of the distillation tower (2), a discharge outlet is formed in the lower part of the right end face of the primary filter box, the primary filter plate (11) is an activated carbon filter plate, and the primary filter plates (11) are arranged in the box body of the primary filter box (10) at equal intervals in sequence;
the secondary filtering device comprises a secondary filtering box (12) and a secondary filtering hopper (13), wherein the secondary filtering box (12) is arranged on the right side of the primary filtering box (10), a feeding hole is formed in the upper portion of the left end face of the secondary filtering box (12) and is connected with a discharging hole of the primary filtering box (10) through a connecting pipe, a discharging hole is formed in the bottom face of the secondary filtering hopper, ultrafiltration membranes are arranged on the inner wall of the secondary filtering hopper (13), the two secondary filtering hoppers (13) are vertically arranged in the filtering box in sequence, a conveying pipe is arranged at the bottom of the upper filtering hopper, and the discharging hole of the conveying pipe is located on the side wall of the lower filtering hopper;
tertiary filter equipment includes tertiary filter case (14) case and electromagnetism iron stick (15), tertiary filter case (14) sets up on second grade filter case (12) right side, and the left end face upper portion of tertiary filter case (14) has been seted up the feed inlet, and this feed inlet passes through the connecting pipe to be connected with the discharge gate of second grade filter case (12), and right-hand member face lower part is equipped with the discharge gate, and the top surface of tertiary filter case (14) is open structure, and the opening part is equipped with sealed lid, the quantity of electromagnetism iron stick (15) is a plurality of, and the equidistance sets up in the bottom of sealed lid, and is connected with control panel (1) through the wire.
2. The separation and purification device for the primary esterification stage in the preparation process of glyceryl triacetate as claimed in claim 1, wherein: one side of tertiary filter case (14) is equipped with setting tank (16), the right-hand member face upper portion of setting tank (16) has been seted up there is the feed inlet, and this feed inlet passes through the connecting pipe to be connected with the discharge gate of tertiary filter case (14), and the left end face lower part is equipped with the discharging pipe, and is equipped with the valve on the discharging pipe, and the bottom is equipped with the pipe of slagging tap, equally is equipped with the valve on the pipe of slagging tap.
3. The separation and purification device for the primary esterification stage in the preparation process of glyceryl triacetate according to claim 1 or 2, which is characterized in that: and a heat insulation layer is arranged outside the distillation tower (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122869676.2U CN216223008U (en) | 2021-11-23 | 2021-11-23 | Separation and purification device at initial esterification stage in glyceryl triacetate preparation process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122869676.2U CN216223008U (en) | 2021-11-23 | 2021-11-23 | Separation and purification device at initial esterification stage in glyceryl triacetate preparation process |
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| CN216223008U true CN216223008U (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122869676.2U Active CN216223008U (en) | 2021-11-23 | 2021-11-23 | Separation and purification device at initial esterification stage in glyceryl triacetate preparation process |
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| CN (1) | CN216223008U (en) |
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- 2021-11-23 CN CN202122869676.2U patent/CN216223008U/en active Active
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