Production system for recycling D-calcium pantothenate mother liquor

Abstract

The utility model relates to the technical field of D-calcium pantothenate production, in particular to a production system for recycling D-calcium pantothenate mother liquor, which comprises a first concentration kettle communicated with a mother liquor conveying pipeline, a concentrated liquor outlet of the first concentration kettle is communicated with a decolorizing kettle, and a decolorizing liquor outlet of the decolorizing kettle is communicated with a cationic resin column. An effluent outlet of the cationic resin column is communicated with an anion resin column, a feed port of the anion resin column is communicated with an eluent conveying pipeline, an eluent outlet of the anion resin column is communicated with a second concentration kettle, a concentrated solution outlet of the second concentration kettle is communicated with a crystallization kettle, and a solvent inlet of the crystallization kettle is communicated with an ethanol conveying pipeline; a crystal outlet of the crystallization kettle is communicated with the drying device; a discharge hole of the drying device is communicated with the product storage tank. According to the production system with the structure, effective recovery treatment of mother liquor calcium pantothenate is realized, resource waste is avoided, the yield, the yield and the purity of D-calcium pantothenate are greatly improved, and economic benefits are increased for enterprises.

Description

Technical Field

[0001] This utility model relates to the field of D-calcium pantothenate production technology, and in particular to a production system for recovering D-calcium pantothenate mother liquor. Background Technology

[0002] Calcium pantothenate is a type of B vitamin and an essential nutrient for normal growth. It is mainly used in medicine, food, and feed additives, and is a component of coenzyme A. The production technologies for D-calcium pantothenate mainly include chemical synthesis, enzymatic methods, and bio-fermentation. Currently, the first two methods are the primary production processes. Microbial bio-fermentation, with its advantages of low production cost, low toxicity, and low pollution, has become the main development direction for the industrial production of D-calcium pantothenate. The main method for extracting D-calcium pantothenate crystals from the fermentation broth is crystallization. Crystals obtained in this way have high chemical and optical purity. However, this method results in the mother liquor containing 15-25% calcium pantothenate, 5-15% water, 60-80% ethanol, and a small amount of pigment. Without effective treatment, this inevitably leads to resource waste. Therefore, how to effectively utilize a production system to recover high-yield, high-purity D-calcium pantothenate from the mother liquor is an urgent technical problem to be solved. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a production system for the recovery of D-calcium pantothenate mother liquor, which addresses the shortcomings of the existing technology. Using this production system, high-yield, high-purity D-calcium pantothenate products can be obtained, thus avoiding resource waste.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] A production system for recovering D-calcium pantothenate mother liquor includes a first concentration vessel connected to a mother liquor conveying pipeline. The vent of the first concentration vessel is connected to a condensation device. The condensate outlet of the condensation device is connected to a buffer tank. The outlet of the buffer tank is connected to a separation tank. The upper liquid outlet of the separation tank is connected to an ethanol conveying pipeline. The concentrate outlet of the first concentration vessel is connected to a decolorization vessel. The decolorized liquid outlet of the decolorization vessel is connected to a cation exchange resin column. The effluent outlet of the cation exchange resin column is connected to an anion exchange resin column. The inlet of the anion exchange resin column is connected to an eluent conveying pipeline. The eluent outlet of the anion exchange resin column is connected to a second concentration vessel. The concentrate outlet of the second concentration vessel is connected to a crystallization vessel. The solvent inlet of the crystallization vessel is connected to the ethanol conveying pipeline. The crystal outlet of the crystallization vessel is connected to a drying device. The outlet of the drying device is connected to a product storage tank.

[0006] As an improved technical solution, the first concentration vessel and the second concentration vessel include a vessel body. The top of the vessel body is provided with a feed inlet and an air outlet, the bottom of the vessel body is provided with a concentrated liquid outlet, the outside of the vessel body is provided with a jacket, and the inside of the vessel body is provided with a stirring shaft. One end of the stirring shaft is connected to a motor, and the stirring shaft is provided with a hollow structure stirring cylinder, and the stirring cylinder is provided with multiple stirring rods.

[0007] As an improved technical solution, the condensation device includes a first condenser, the uncondensed gas outlet of the first condenser is connected to a second condenser, and the condensate outlets of the first condenser and the second condenser are connected to a buffer tank.

[0008] As an improved technical solution, the decolorizing kettle includes a kettle body. The top of the kettle body is provided with a feed inlet, a diluent inlet, and a decolorizing agent inlet. The bottom of the kettle body is provided with a decolorizing agent outlet, and the lower side of the kettle body is provided with a decolorizing liquid outlet. A filter screen is provided on the inner wall of the kettle body at a position corresponding to the decolorizing liquid outlet. The kettle body is provided with a jacket on the outside and a rotating shaft is provided inside the kettle body. One end of the rotating shaft is connected to a motor. Multiple stirring rings are provided on the rotating shaft. Multiple hollow arc-shaped plates are provided on the stirring rings. An auxiliary stirring block is provided at the end of the arc-shaped plate.

[0009] As an improved technical solution, the cation exchange resin column is provided with a macroporous strong acid cation exchange resin layer, a macroporous weak acid styrene-propylene cation exchange resin layer, a macroporous weak acid cation exchange resin, or a strong acid styrene-based cation exchange resin layer.

[0010] As an improved technical solution, the anion exchange resin column is provided with a macroporous weakly basic anion exchange resin layer, a macroporous strongly basic styrene-based anion exchange resin layer, or a macroporous strongly basic acrylic anion exchange resin layer.

[0011] After adopting the above technical solution, the beneficial effects of this utility model are:

[0012] The production system for recovering D-calcium pantothenate mother liquor includes a first concentration vessel connected to a mother liquor conveying pipeline. The vent of the first concentration vessel is connected to a condensation device. The condensate outlet of the condensation device is connected to a buffer tank. The outlet of the buffer tank is connected to a separation tank. The upper liquid outlet of the separation tank is connected to an ethanol conveying pipeline. The concentrated liquid outlet of the first concentration vessel is connected to a decolorization vessel. The decolorized liquid outlet of the decolorization vessel is connected to a cation exchange resin column. The effluent outlet of the cation exchange resin column is connected to an anion exchange resin column. The inlet of the anion exchange resin column is connected to an eluent conveying pipeline. The eluent outlet of the anion exchange resin column is connected to a second concentration vessel. The concentrated liquid outlet of the second concentration vessel is connected to a crystallization vessel. The solvent inlet of the crystallization vessel is connected to the ethanol conveying pipeline. The crystal outlet of the crystallization vessel is connected to a drying device. The outlet of the drying device is connected to a product storage tank. In actual production, the mother liquor from D-calcium pantothenate crystallization is collected and then pumped into the first concentration vessel through a mother liquor delivery pipeline. After heating and concentration, the ethanol vapor in the mother liquor enters the condenser. The collected condensate is stored in a buffer tank and then transported to a separation tank. Sodium salt is added, and after stirring and settling, the upper layer is discharged from the outlet and enters the ethanol delivery pipeline (as a solvent during crystallization). The concentrated liquid in the first concentration vessel is pumped into the decolorization vessel. The decolorized liquid then enters the cation exchange resin column, and the effluent enters the anion exchange resin column. The eluent enters the anion exchange resin column through the eluent delivery pipeline for elution. The collected eluent enters the second concentration vessel for further concentration. The concentrated liquid then enters the crystallization vessel through a pipeline, where solvent and seed crystals are added. The crystals are first cooled to grow crystals, and then cooled again. The formed crystals are conveyed to the drying device for drying. Finally, the D-calcium pantothenate is stored in a product storage tank. The production system described above enables the effective recovery and treatment of the mother liquor-derived calcium pantothenate, avoiding resource waste and greatly improving the yield, purity, and output of D-calcium pantothenate, thus increasing economic benefits for the enterprise.

[0013] The first and second concentration vessels each consist of a vessel body. The top of the vessel body has a feed inlet and an vent, while the bottom has a concentrate outlet. The vessel body is fitted with a jacket, and inside is a stirring shaft. One end of the stirring shaft is connected to a motor, and the stirring shaft has a perforated stirring drum with multiple stirring rods. The heating medium in the jacket provides the necessary temperature for concentration. Once the motor starts, it drives the stirring shaft, stirring drum, and multiple stirring rods to agitate the liquid, ensuring uniform heating and facilitating concentration.

[0014] The condensation unit includes a first condenser, whose uncondensed gas outlet is connected to a second condenser. The condensate outlets of both the first and second condensers are connected to a buffer tank. Ethanol in the concentrate is distilled off in the first concentration vessel and then enters the first condenser for condensation. The uncondensed gas then enters the second condenser for further condensation. The condensed liquid from the first and second condensers is stored in the buffer tank before being fed into subsequent processing equipment. This condensation unit is rationally designed, achieving effective condensation of ethanol vapor and avoiding resource waste.

[0015] The decolorizing kettle consists of a kettle body. The top of the kettle body has a feed inlet, a diluent inlet, and a decolorizing agent inlet. The bottom of the kettle body has a decolorizing agent outlet, and one side of the lower part of the kettle body has a decolorizing liquid outlet. A filter screen is installed on the inner wall of the kettle body corresponding to the decolorizing liquid outlet. The kettle body has a jacket on the outside and a rotating shaft inside. One end of the rotating shaft is connected to a motor, and multiple stirring rings are mounted on the shaft. Each stirring ring has multiple perforated arc-shaped plates, and auxiliary stirring blocks are located at the ends of the arc-shaped plates. The concentrated liquid enters the kettle body through a pipeline under the action of a delivery pump. Diluent (water) is added. After the motor starts, it drives the stirring shaft, stirring rings, arc-shaped plates, and auxiliary stirring blocks to mix the concentrated liquid and water. Then, the decolorizing agent (activated carbon) is added, and stirring continues. The heat medium in the jacket provides the temperature required for the decolorization process. After decolorization, the decolorizing liquid passes through the filter screen and enters the next processing equipment under the action of a vacuum pump. The decolorizing agent is discharged from the decolorizing agent outlet. The decolorizing kettle with the above structure is reasonably designed, which realizes the decolorization treatment of the liquid and ensures the color of the D-calcium pantothenate product.

[0016] Because the cation exchange resin column contains a layer of macroporous strong acid cation exchange resin, a layer of macroporous weak acid styrene-based cation exchange resin, a layer of macroporous weak acid cation exchange resin, or a layer of strong acid styrene-based cation exchange resin, the cation exchange resin column using the above-mentioned packing material can effectively remove cations from the effluent, greatly improving the purity of D-calcium pantothenate.

[0017] Because the anion exchange resin column contains a layer of macroporous weakly basic anion exchange resin, a layer of macroporous strongly basic styrene-based anion exchange resin, or a layer of macroporous strongly basic acrylic anion exchange resin, the anion exchange resin column using the above-mentioned packing material can effectively remove anions from the effluent, greatly improving the purity of D-calcium pantothenate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a production system for recovering D-calcium pantothenate mother liquor according to this utility model;

[0019] Among them, 1-mother liquor conveying pipeline, 2-first concentration kettle, 3-condensation device, 30-first condenser, 31-second condenser, 4-buffer tank, 5-separation tank, 50-visible window, 6-ethanol conveying pipeline, 7-decolorization kettle, 8-cationic resin column, 9-anion resin column, 10-eluent conveying pipeline, 11-second concentration kettle, 12-crystallization kettle, 13-drying device, 14-product storage tank. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] A production system for recovering D-calcium pantothenate mother liquor, such as Figure 1 As shown, the system includes a first concentration vessel 2 connected to a mother liquor conveying pipeline 1. The vent of the first concentration vessel 2 is connected to a condensing device 3. The condensate outlet of the condensing device 3 is connected to a buffer tank 4. The outlet of the buffer tank 4 is connected to a separation tank 5 (including a tank body, a feed inlet and a sodium salt inlet at the top of the tank body, a lower liquid outlet at the bottom of the tank body, an upper liquid outlet on one side of the upper part of the tank body, a rotating shaft inside the tank body, one end of the rotating shaft connected to a motor, multiple hollowed-out stirring plates on the rotating shaft, and a viewing window 50 on the tank body). The upper liquid outlet of the separation tank 5 is connected to an ethanol conveying pipeline 6. The concentrated liquid outlet of the first concentration vessel 3 is connected to a decolorizing vessel 7. The decolorized liquid outlet of the decolorizing vessel 7 is connected to a cation exchange resin column 8. The effluent outlet of the cation exchange resin column 8 is connected to... An anion exchange resin column 9 has its inlet connected to an eluent delivery pipe 10, and its eluent outlet connected to a second concentration vessel 11. The concentrated liquid outlet of the second concentration vessel 11 is connected to a crystallization vessel 12 (which includes a vessel body, with an inlet and a crystal inlet at the top, a crystal outlet at the bottom, a liquid outlet on one side of the lower part of the vessel body, a filter screen on the inner wall of the vessel body corresponding to the liquid outlet, a jacket on the outside of the vessel body, and a rotating shaft inside the vessel body, one end of which is connected to a motor and has multiple stirring rods). The solvent inlet of the crystallization vessel 12 is connected to an ethanol delivery pipe 6, and the crystal outlet of the crystallization vessel 12 is connected to a drying device (double cone dryer) 13. The outlet of the drying device 13 is connected to a product storage tank 14.

[0022] In actual production, the mother liquor from D-calcium pantothenate crystallization is collected and then pumped into the first concentration vessel through a mother liquor delivery pipeline. After heating and concentration, the ethanol vapor in the mother liquor enters the condenser. The collected condensate is stored in a buffer tank and then transported to a separation tank. Sodium salt is added, and after stirring and settling, the upper layer is discharged from the outlet and enters the ethanol delivery pipeline (as a solvent during crystallization). The concentrated liquid in the first concentration vessel is pumped into the decolorization vessel. The decolorized liquid then enters the cation exchange resin column, and the effluent enters the anion exchange resin column. The eluent enters the anion exchange resin column through the eluent delivery pipeline for elution. The collected eluent enters the second concentration vessel for further concentration. The concentrated liquid then enters the crystallization vessel through a pipeline, where solvent and seed crystals are added. The crystals are first cooled to grow crystals, and then cooled again. The formed crystals are conveyed to the drying device for drying. Finally, the D-calcium pantothenate is stored in a product storage tank. The production system described above enables the effective recovery and treatment of the mother liquor-derived calcium pantothenate, avoiding resource waste and greatly improving the yield, purity, and output of D-calcium pantothenate, thus increasing economic benefits for the enterprise.

[0023] The first concentration vessel 2 and the second concentration vessel 11 each include a vessel body. The top of the vessel body has a feed inlet and a drain outlet, and the bottom of the vessel body has a concentrate outlet. The vessel body is fitted with a jacket, and inside the vessel body is a stirring shaft. One end of the stirring shaft is connected to a motor, and the stirring shaft has a perforated stirring cylinder with multiple stirring rods. The heat transfer medium in the jacket provides the temperature required for concentration. After the motor starts, it drives the stirring shaft, stirring cylinder, and multiple stirring rods to stir the liquid, ensuring uniform heating and facilitating concentration.

[0024] The condensation device 3 includes a first condenser 30, the uncondensed gas outlet of the first condenser 30 is connected to a second condenser 31, and the condensate outlets of the first condenser 30 and the second condenser 31 are connected to a buffer tank 4. Ethanol in the concentrate is distilled off in the first concentration vessel and then enters the first condenser for condensation. The uncondensed gas then enters the second condenser for further condensation. The liquid condensed by the first and second condensers is stored in the buffer tank and then enters subsequent processing equipment.

[0025] The decolorizing reactor 7 includes a reactor body. The top of the reactor body has a feed inlet, a diluent inlet, and a decolorizing agent inlet. The bottom of the reactor body has a decolorizing agent outlet, and one side of the lower part of the reactor body has a decolorizing liquid outlet. A filter screen 70 is installed on the inner wall of the reactor body corresponding to the decolorizing liquid outlet. The reactor body has a jacket, and inside the reactor body is a rotating shaft 71. One end of the rotating shaft 71 is connected to a motor 72. Multiple stirring rings 73 are installed on the rotating shaft 71, and multiple hollowed-out arc-shaped plates 74 are installed on the stirring rings 73. An auxiliary stirring block 75 is installed at the end of each arc-shaped plate 74. The concentrated liquid enters the reactor body through a pipeline under the action of a delivery pump. Diluent (water) is added. After the motor starts, it drives the stirring shaft, stirring rings, arc-shaped plates, and auxiliary stirring blocks to mix the concentrated liquid and water. Then, the decolorizing agent (activated carbon) is added, and stirring continues. The heat medium in the jacket provides the temperature required for decolorization. After decolorization, the decolorizing liquid passes through the filter screen and enters the next processing equipment under the action of a filtration pump. The decolorizing agent is discharged from the decolorizing agent outlet.

[0026] The cation exchange resin column 8 contains a macroporous strong acid cation exchange resin layer (or a macroporous weak acid styrene-propylene cation exchange resin layer, a macroporous weak acid cation exchange resin, or a strong acid styrene-based cation exchange resin layer). Using the above-mentioned filler material, the cation exchange resin column can effectively remove cations from the effluent, greatly improving the purity of D-calcium pantothenate.

[0027] The anion exchange resin column 9 contains a macroporous weakly basic anion exchange resin layer (or a macroporous strong basic styrene-based anion exchange resin layer or a macroporous strong basic acrylic-based anion exchange resin layer). Using the above-mentioned packing material, the anion exchange resin column can effectively remove anions from the effluent, greatly improving the purity of D-calcium pantothenate.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A production system for recovering D-calcium pantothenate mother liquor, characterized in that, The system includes a first concentration vessel connected to a mother liquor conveying pipeline; the vent of the first concentration vessel is connected to a condensation device; the condensate outlet of the condensation device is connected to a buffer tank; the outlet of the buffer tank is connected to a separation tank; and the upper liquid outlet of the separation tank is connected to an ethanol conveying pipeline. The concentrated liquid outlet of the first concentration vessel is connected to a decolorization vessel; the decolorized liquid outlet of the decolorization vessel is connected to a cation exchange resin column; the effluent outlet of the cation exchange resin column is connected to an anion exchange resin column; the inlet of the anion exchange resin column is connected to an eluent conveying pipeline; the eluent outlet of the anion exchange resin column is connected to a second concentration vessel; the concentrated liquid outlet of the second concentration vessel is connected to a crystallization vessel; the solvent inlet of the crystallization vessel is connected to the ethanol conveying pipeline; the crystal outlet of the crystallization vessel is connected to a drying device; and the outlet of the drying device is connected to a product storage tank.

2. The production system for recovering D-calcium pantothenate mother liquor according to claim 1, characterized in that, The first and second concentration vessels each include a vessel body. The top of the vessel body is provided with a feed inlet and an vent outlet. The bottom of the vessel body is provided with a concentrate outlet. The vessel body is provided with a jacket. The vessel body is provided with a stirring shaft inside. One end of the stirring shaft is connected to a motor. The stirring shaft is provided with a hollowed-out stirring cylinder. The stirring cylinder is provided with multiple stirring rods.

3. The production system for recovering D-calcium pantothenate mother liquor according to claim 1, characterized in that, The condensation device includes a first condenser, the uncondensed gas outlet of the first condenser is connected to a second condenser, and the condensate outlets of the first condenser and the second condenser are connected to a buffer tank.

4. The production system for recovering D-calcium pantothenate mother liquor according to claim 1, characterized in that, The decolorizing kettle includes a kettle body. The top of the kettle body is provided with a feed inlet, a diluent inlet, and a decolorizing agent inlet. The bottom of the kettle body is provided with a decolorizing agent outlet. The lower side of the kettle body is provided with a decolorizing liquid outlet. A filter screen is provided on the inner wall of the kettle body at a position corresponding to the decolorizing liquid outlet. The kettle body is provided with a jacket. The kettle body is provided with a rotating shaft inside. One end of the rotating shaft is connected to a motor. Multiple stirring rings are provided on the rotating shaft. Multiple hollow arc-shaped plates are provided on the stirring rings. The ends of the arc-shaped plates are provided with auxiliary stirring blocks.

5. The production system for recovering D-calcium pantothenate mother liquor according to claim 1, characterized in that, The cation exchange resin column contains a macroporous strong acid cation exchange resin layer, a macroporous weak acid styrene-propylene cation exchange resin layer, a macroporous weak acid cation exchange resin layer, or a strong acid styrene-based cation exchange resin layer.

6. The production system for recovering D-calcium pantothenate mother liquor according to claim 1, characterized in that, The anion exchange resin column contains a macroporous weakly basic anion exchange resin layer, a macroporous strongly basic styrene-based anion exchange resin layer, or a macroporous strongly basic acrylic anion exchange resin layer.

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