CN218924684U - Alkaline hydrolysis device for preparing photoinitiator - Google Patents
Alkaline hydrolysis device for preparing photoinitiator Download PDFInfo
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- CN218924684U CN218924684U CN202223256950.XU CN202223256950U CN218924684U CN 218924684 U CN218924684 U CN 218924684U CN 202223256950 U CN202223256950 U CN 202223256950U CN 218924684 U CN218924684 U CN 218924684U
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Abstract
The utility model relates to an alkaline hydrolysis device for preparing a photoinitiator, which comprises an alkaline hydrolysis reactor for alkaline hydrolysis reaction and liquid separation and an evaporation filter for evaporation concentration and desalination; the alkaline hydrolysis liquid water phase outlet of the alkaline hydrolysis reactor is communicated with the liquid adding port of the evaporation filter, and the liquid outlet of the evaporation filter is communicated with the alkaline liquid inlet of the alkaline hydrolysis reactor; the alkaline hydrolysis device can realize the evaporation, concentration and desalination of the alkaline hydrolysis liquid water phase, obtain the recovered alkaline liquid and apply the recovered alkaline liquid, reduce the consumption of the liquid alkaline in the alkaline hydrolysis reaction, improve the utilization rate of raw materials and reduce the process cost.
Description
Technical Field
The utility model belongs to the field of preparation of photoinitiators, and relates to an alkaline hydrolysis device for preparing photoinitiators.
Background
The photoinitiator is a compound which can absorb energy with a certain wavelength in an ultraviolet light region (250-420 nm) or a visible light region (400-800 nm) to generate free radicals, cations and the like so as to initiate the polymerization, crosslinking and curing of the monomers.
The photoinitiator 1173 and 184 are alpha-hydroxy ketone photoinitiators, and the preparation process generally comprises the steps of mixing a photoinitiator intermediate halide, a liquid alkali solution and a catalyst for alkaline hydrolysis reaction, separating the solution, neutralizing the obtained alkaline hydrolysis liquid water phase by adding acid, evaporating and dehydrating to prepare salt to obtain sodium salt; the alkali solution is excessive in the alkaline hydrolysis reaction, the utilization rate of the alkali solution is low by adopting the treatment mode, the energy consumption for preparing salt by evaporation and dehydration is high, and the process cost is high.
The equation for the photoinitiator 1173 alkaline hydrolysis process is shown below;
the equation for the alkaline hydrolysis process of the photoinitiator 184 is shown below;
therefore, developing an alkaline hydrolysis device for preparing the photoinitiator, which can improve the utilization rate of liquid alkali and reduce the process cost, still has important significance.
Disclosure of Invention
The utility model aims to provide an alkaline hydrolysis device for preparing a photoinitiator, which comprises an alkaline hydrolysis reactor for alkaline hydrolysis reaction and liquid separation and an evaporation filter for evaporation concentration and desalination; the alkaline hydrolysis liquid water phase outlet of the alkaline hydrolysis reactor is communicated with the liquid adding port of the evaporation filter, and the liquid outlet of the evaporation filter is communicated with the alkaline liquid inlet of the alkaline hydrolysis reactor; the alkaline hydrolysis device can realize the evaporation, concentration and desalination of the alkaline hydrolysis liquid water phase, obtain the recovered alkaline liquid and apply the recovered alkaline liquid, reduce the consumption of the liquid alkaline in the alkaline hydrolysis reaction, improve the utilization rate of raw materials and reduce the process cost.
In order to achieve the aim of the utility model, the utility model adopts the following technical scheme:
the utility model provides an alkaline hydrolysis device for preparing a photoinitiator, which comprises an alkaline hydrolysis reactor and an evaporation filter which are communicated with each other;
the alkaline hydrolysis liquid water phase outlet of the alkaline hydrolysis reactor is communicated with the liquid adding port of the evaporation filter, and the liquid outlet of the evaporation filter is communicated with the alkaline liquid inlet of the alkaline hydrolysis reactor.
Taking an alpha-hydroxyketone photoinitiator as an example, wherein the preparation process comprises the step of mixing a halogenated intermediate with a liquid alkali solution for alkaline hydrolysis; in the traditional alkaline hydrolysis process, alkaline hydrolysis reaction is carried out in an alkaline hydrolysis reaction kettle, alkaline hydrolysis liquid water phase is obtained by separating liquid, then acid is added for neutralization, and salt is prepared by evaporation; the process can cause waste of liquid alkali, and has high treatment cost and high energy consumption; based on the solution of the problems, the utility model provides an alkaline hydrolysis device for preparing a photoinitiator, which can improve the utilization rate of alkali liquor and reduce the process cost.
The alkaline hydrolysis device comprises an alkaline hydrolysis reactor and an evaporation filter, wherein the alkaline hydrolysis reactor is used for mixing a photoinitiator intermediate halide, a liquid alkali solution and a catalyst to perform alkaline hydrolysis reaction, and separating liquid after the reaction is completed to obtain a lower alkaline hydrolysis liquid-water phase; discharging an alkaline hydrolysis liquid water phase from an alkaline hydrolysis liquid water phase outlet of an alkaline hydrolysis reactor, entering the evaporation filter through a liquid adding port of the evaporation filter, evaporating and concentrating, concentrating until the concentration of liquid alkali in the solution meets alkaline hydrolysis requirements by utilizing the solubility difference of sodium chloride and sodium hydroxide, separating NaCl out in the concentration process, filtering to obtain recovered alkali liquor meeting the application requirements, and applying the recovered alkali liquor to alkaline hydrolysis reaction through an alkali liquor inlet of the alkaline hydrolysis reactor; the recovered alkali liquor can be mixed with fresh alkali liquor for alkaline hydrolysis reaction, so that the utilization rate of the alkali liquor is improved, and the raw material cost and the process energy consumption are reduced.
Taking the alkaline hydrolysis process of the photoinitiator 184 as an example, the concentration range of the liquid alkali solution meeting the alkaline hydrolysis requirement is 28% -32%, the concentration of the liquid alkali in the alkaline hydrolysis liquid water phase obtained by alkaline hydrolysis reaction and liquid separation is 5% -8%, and the recovery alkali solution (the concentration of NaOH is 28% -32% by weight) meeting the requirement can be obtained after concentration by utilizing the solubility difference of NaCl and NaOH, so that the utilization rate of the liquid alkali is improved.
In the alkaline hydrolysis device, the alkaline hydrolysis reactor can be an alkaline hydrolysis reaction kettle, namely, the alkaline hydrolysis reaction and the liquid separation process are both carried out in the alkaline hydrolysis reaction kettle, the liquid separation process is carried out, the alkaline hydrolysis liquid water phase is positioned at the lower layer, the product phase is positioned at the upper layer, and the alkaline hydrolysis liquid water phase is separated from an alkaline hydrolysis liquid water phase outlet at the bottom of the alkaline hydrolysis reaction kettle; the device can also be a connected alkaline hydrolysis reaction kettle and a liquid separating tank, the alkaline hydrolysis reaction is carried out in the alkaline hydrolysis reaction kettle, the liquid separating process is carried out in the liquid separating tank, and the bottom of the liquid separating tank is provided with an alkaline hydrolysis liquid water phase outlet.
In the alkaline hydrolysis device, a raw material inlet is arranged on an alkaline hydrolysis reactor and is used for adding a photoinitiator intermediate halide, a liquid alkali solution and a catalyst. The number of the raw material inlet can be one or more, namely, various materials are added from the same raw material inlet or each raw material corresponds to one raw material inlet.
Preferably, the alkaline hydrolysis reactor is provided with a heating jacket.
Preferably, a stirring paddle is arranged in the alkaline hydrolysis reactor and is connected with a motor through a stirring shaft.
Preferably, the evaporation filter comprises an evaporation concentration section, a filtering section and a liquid storage cavity which are sequentially communicated.
The evaporation concentration section in the evaporation filter is used for heating, concentrating and dehydrating the alkaline hydrolysis liquid water phase, so that sodium chloride is separated out by utilizing the solubility difference of sodium chloride and sodium hydroxide, and the concentration of alkali liquor is improved; and then the waste liquid enters a filtering section to be filtered to remove precipitated NaCl, the obtained concentrated recovered alkali liquid enters a liquid storage cavity, the recovered alkali liquid is reused, and the obtained NaCl is treated as a byproduct.
Preferably, the evaporation and concentration section is located above the filtration section.
In the utility model, the evaporation concentration section is positioned above the filtering section, so that the concentrated solution can flow into the filtering section conveniently.
Preferably, the evaporation and concentration section comprises a funnel-shaped shell, a concentration discharge port is arranged at the bottom of the funnel-shaped shell, a valve is arranged at the concentration discharge port, and the concentration discharge port is communicated with the filtering section.
The shell of the evaporation concentration section adopts a funnel shape, namely, the upper end opening is large, the evaporation concentration is convenient, the lower end opening is small, and the control of the concentrate discharge process is facilitated.
Preferably, a sealing cover is arranged at the opening of the upper end of the funnel-shaped shell in the evaporation concentration section, a liquid adding opening and an air outlet are arranged on the sealing cover, and the liquid adding opening is communicated with an alkaline hydrolysis liquid phase outlet of the alkaline hydrolysis reactor.
In the utility model, the upper end opening of the funnel-shaped shell is provided with the sealing cover, so that the sealing concentration and the collection of steam are convenient; meanwhile, a liquid adding opening is arranged on the sealing cover and is connected with an alkaline hydrolysis liquid phase outlet of the alkaline hydrolysis reactor, and in the operation process, the alkaline hydrolysis liquid phase is discharged from the alkaline hydrolysis liquid phase outlet and enters the evaporation concentration section through the liquid adding opening on the sealing cover.
Preferably, a heating jacket is arranged outside the funnel-shaped shell in the evaporation concentration section.
In the utility model, the evaporation and concentration section is heated by an external heating sleeve, so that the temperature in the concentration process can be conveniently controlled.
Preferably, a wall scraping type stirring paddle is arranged in the funnel-shaped shell in the evaporation concentration section.
According to the utility model, the wall scraping type stirring paddle is arranged in the funnel-shaped shell, so that the precipitated sodium chloride is prevented from being deposited on the inner wall of the shell, the heat transfer is influenced, and meanwhile, the discharging is convenient.
Preferably, the filter section comprises an inverted funnel-shaped housing at an upper portion and a cylindrical housing at a lower portion.
Preferably, the upper end opening of the inverted funnel-shaped shell is connected with the concentration discharge port of the evaporation concentration section.
Preferably, the lower end opening of the inverted funnel-shaped housing is connected to the upper end opening of the cylindrical housing.
Preferably, a filter layer is disposed in the cylindrical housing in a horizontal direction.
Preferably, the lower end opening of the cylindrical shell is communicated with a liquid storage cavity, a liquid outlet is formed in the bottom of the liquid storage cavity, and the liquid outlet is communicated with an alkali liquor inlet of the alkaline hydrolysis reactor.
In the utility model, the filtering section comprises an upper shell and a lower shell which are communicated, wherein the upper shell is an inverted funnel-shaped shell, the upper end opening of the upper shell is small and is communicated with the lower end opening of the funnel-shaped shell of the evaporation concentration section, and a valve is arranged at the communicating position, so that the control of the discharging process of the evaporation concentration section is conveniently realized; the lower shell is a cylindrical shell and is internally provided with a filter layer, so that the filtering process is convenient to realize; a liquid storage cavity is arranged below the cylindrical shell and used for storing the recovered alkali liquor and discharging the recovered alkali liquor from a liquid outlet to be sleeved for alkaline hydrolysis reaction in the alkaline hydrolysis reactor.
Preferably, a salt outlet is arranged on the side wall of the cylindrical shell at a position corresponding to the filter layer. The salt outlet is used for discharging sodium salt on the surface of the filter layer, and the obtained sodium salt can be treated as a byproduct.
Preferably, a vacuum-pumping port is arranged on the side wall of the cylindrical shell below the filter layer. The vacuum-pumping port is arranged at the position, so that the filtering efficiency is improved.
Preferably, the evaporation and concentration section is provided with a reflux liquid port, and a liquid outlet of the liquid storage cavity is communicated with the reflux liquid port.
In the utility model, a liquid outlet at the bottom of the liquid storage cavity can be respectively communicated with a reflux liquid outlet of the evaporation concentration section and an alkali liquid inlet of the alkaline hydrolysis reactor through a multi-way valve.
In the utility model, the evaporation and filtration processes in the evaporation filter can be circularly operated, namely when one-step concentration is not in place, the concentrated solution in the liquid storage cavity can be conveyed into the evaporation concentration section for secondary evaporation concentration and filtration, so that the recovered alkali solution with proper concentration is obtained.
The utility model provides an operation method of an alkaline hydrolysis device for preparing a photoinitiator, which specifically comprises the following steps:
(1) Adding a photoinitiator intermediate halide, a liquid alkali solution and a catalyst into an alkaline hydrolysis reactor from a raw material adding port, and starting stirring and heating to perform alkaline hydrolysis reaction; after the reaction is finished, separating an alkaline hydrolysis liquid water phase from an alkaline hydrolysis liquid water phase outlet of the alkaline hydrolysis reactor;
(2) Adding an alkaline hydrolysis liquid water phase into an evaporation filter through a liquid adding port of the evaporation filter, evaporating and concentrating, precipitating sodium salt, filtering to obtain concentrated recovered alkali liquor, discharging the recovered alkali liquor through a liquid outlet of the evaporation filter, and adding the recovered alkali liquor into the alkaline hydrolysis reactor through an alkali liquor inlet to realize recovery and recycling of the alkali liquor.
Compared with the prior art, the utility model has the following beneficial effects:
the alkaline hydrolysis device comprises an alkaline hydrolysis reactor and an evaporation filter, wherein the alkaline hydrolysis reactor is used for carrying out alkaline hydrolysis reaction on a photoinitiator intermediate halide, and separating liquid after the reaction is finished to obtain an alkaline hydrolysis liquid water phase, and the evaporation filter is used for carrying out evaporation concentration, filtration and desalination on the alkaline hydrolysis liquid water phase to obtain recovered alkali liquid meeting the alkaline hydrolysis concentration requirement and applying the recovered alkali liquid to the alkaline hydrolysis reaction; the device disclosed by the utility model can improve the utilization rate of the liquid alkali solution in the alkaline hydrolysis reaction, and reduce the raw material cost and the treatment cost of the alkaline hydrolysis liquid water phase.
Drawings
FIG. 1 is a schematic structural diagram of an alkaline hydrolysis apparatus for preparing a photoinitiator according to example 1 of the present utility model;
FIG. 2 is a schematic structural diagram of an alkaline hydrolysis apparatus for preparing a photoinitiator according to example 2 of the present utility model;
FIG. 3 is a schematic structural diagram of an alkaline hydrolysis apparatus for preparing a photoinitiator according to example 3 of the present utility model;
FIG. 4 is a schematic structural diagram of an alkaline hydrolysis apparatus for preparing a photoinitiator according to example 4 of the present utility model;
1-alkaline hydrolysis reactor, 10-alkaline hydrolysis liquid water phase outlet, 11-alkaline liquor inlet, 12-raw material inlet, 13-alkaline hydrolysis reaction heating jacket, 14-stirrer, 15-conveying device, 2-evaporation filter, 20-liquid inlet, 21-liquid outlet, 22-evaporation concentration section, 220-funnel-shaped shell, 221-concentration discharge port, 222-valve, 223-sealing cover, 224-exhaust port, 225-heating jacket, 226-scraping wall stirring paddle, 227-reflux liquid port, 23-filtering section, 230-inverted funnel-shaped shell, 231-cylindrical shell, 232-filtering layer, 233-salt outlet, 234-vacuumizing port and 24-liquid storage cavity.
Detailed Description
The technical scheme of the utility model is further described by the following specific embodiments. It will be apparent to those skilled in the art that the examples are merely to aid in understanding the utility model and are not to be construed as a specific limitation thereof.
Example 1
The embodiment provides an alkaline hydrolysis device for preparing a photoinitiator, which is shown in fig. 1 and comprises an alkaline hydrolysis reactor 1 and an evaporation filter 2 which are communicated;
the alkaline hydrolysis liquid water phase outlet 10 of the alkaline hydrolysis reactor 1 is communicated with the liquid adding port 20 of the evaporation filter 2, and the liquid outlet 21 of the evaporation filter 2 is communicated with the alkaline liquid inlet 11 of the alkaline hydrolysis reactor; the alkaline hydrolysis reactor is provided with a raw material inlet 12.
The embodiment provides an operation method of the alkaline hydrolysis device, which specifically comprises the following steps:
(1) Adding a photoinitiator intermediate halide, a liquid alkali solution and a catalyst into an alkaline hydrolysis reactor from a raw material adding port, and starting stirring and heating to perform alkaline hydrolysis reaction; after the reaction is finished, separating an alkaline hydrolysis liquid water phase from an alkaline hydrolysis liquid water phase outlet of the alkaline hydrolysis reactor;
(2) Adding an alkaline hydrolysis liquid water phase into an evaporation filter through a liquid adding port of the evaporation filter, evaporating and concentrating, precipitating sodium salt, filtering to obtain concentrated recovered alkali liquor, discharging the recovered alkali liquor through a liquid outlet of the evaporation filter, and adding the recovered alkali liquor into the alkaline hydrolysis reactor through an alkali liquor inlet to realize recovery and recycling of the alkali liquor.
Example 2
The embodiment provides an alkaline hydrolysis device for preparing a photoinitiator, which comprises an alkaline hydrolysis reactor and an evaporation filter which are communicated;
the alkaline hydrolysis liquid water phase outlet 10 of the alkaline hydrolysis reactor is communicated with the liquid adding port 20 of the evaporation filter, and the liquid outlet 21 of the evaporation filter is communicated with the alkaline liquid inlet 11 of the alkaline hydrolysis reactor; conveying devices 15 are arranged on the pipelines between the alkaline hydrolysis liquid water phase outlet 10 and the liquid adding port 20 and between the liquid outlet 21 and the alkali liquid inlet 11, and are used for completing liquid phase conveying;
the alkaline hydrolysis reactor is provided with a raw material inlet 12; the alkaline hydrolysis reactor is provided with an alkaline hydrolysis reaction heating jacket 13, and a stirrer 14 is arranged in the alkaline hydrolysis reactor;
the evaporation filter comprises an evaporation concentration section 22, a filtering section 23 and a liquid storage cavity 24 which are sequentially communicated; the evaporation and concentration section 22 is positioned above the filtering section 23;
the evaporation and concentration section 22 comprises a funnel-shaped shell 220, a concentration discharge hole 221 is formed in the bottom of the funnel-shaped shell 220, a valve 222 is arranged at the concentration discharge hole 221, and the concentration discharge hole 221 is communicated with the filtering section 23;
a sealing cover 223 is arranged at the opening of the upper end of the funnel-shaped shell 220 in the evaporation and concentration section 22, a liquid adding opening 20 and an air outlet 224 are arranged on the sealing cover 223, and the liquid adding opening 20 is communicated with the alkaline hydrolysis liquid water phase outlet 10 of the alkaline hydrolysis reactor;
a heating jacket 225 is arranged outside the funnel-shaped shell 220 in the evaporation and concentration section;
a wall scraping type stirring paddle 226 is arranged in the funnel-shaped shell 220 in the evaporation and concentration section;
the upper end opening of the funnel-shaped shell in the evaporation concentration section is provided with a sealing cover, and the sealing cover is provided with a liquid adding port and an air outlet, so that the airtight evaporation concentration process is conveniently realized; and set up the heating jacket in funnel-shaped casing outside, its accuse temperature of being convenient for evaporation concentration process, inside sets up scrapes wall type stirring rake, is favorable to promoting concentration process efficiency, improves concentrated effect, and is convenient for the ejection of compact.
The filter stage 23 includes an inverted funnel-shaped housing 230 at an upper portion and a cylindrical housing 231 at a lower portion;
the upper end opening of the inverted funnel-shaped shell 230 is connected with a concentration discharge hole 221 of the evaporation concentration section 22;
the lower end opening of the inverted funnel-shaped housing 230 is connected to the upper end opening of the cylindrical housing 231;
a filtering layer 232 is arranged in the cylindrical housing 231 along the horizontal direction;
the lower end opening of the cylindrical shell 231 is communicated with a liquid storage cavity 24, a liquid outlet 21 is arranged at the bottom of the liquid storage cavity 24, and the liquid outlet 21 is communicated with an alkali liquid inlet 11 of the alkaline hydrolysis reactor; the liquid outlet of the liquid storage cavity is communicated with the alkali liquid inlet, so that the recycling of alkali liquid is realized, and the process cost is reduced;
and a salt outlet 233 is formed in the side wall of the cylindrical housing 231 at a position corresponding to the filter layer, and after the filtration is completed, the sodium salt obtained by the filtration can be taken out from the salt outlet and treated as a byproduct.
The embodiment adopts a specific evaporation filter structure on the basis of embodiment 1, wherein an evaporation concentration section is positioned above a filtering section, the evaporation concentration section adopts a funnel-shaped shell, a bottom concentration discharge hole of the evaporation concentration section is communicated with an upper end opening of an inverted funnel-shaped shell of the filtering section, and a valve is arranged at the concentration discharge hole; the adoption of the arrangement is convenient for the discharging of the evaporation and concentration section and the control of the discharging process; the lower part of the inverted funnel-shaped shell of the filtering section is a cylindrical shell with a built-in horizontal filtering layer, and a liquid storage cavity is arranged below the cylindrical shell, so that the filtering process is convenient to carry out and the concentrated recycling alkali liquor is convenient to collect.
The embodiment provides an operation method of the alkaline hydrolysis device, which specifically comprises the following steps:
(1) Adding a photoinitiator intermediate halide, a liquid alkali solution and a catalyst into an alkaline hydrolysis reactor from a raw material adding port, and starting a stirrer and an alkaline hydrolysis reaction heating sleeve to perform alkaline hydrolysis reaction; after the reaction is finished, separating an alkaline hydrolysis liquid water phase from an alkaline hydrolysis liquid water phase outlet of the alkaline hydrolysis reactor;
(2) Adding an alkaline hydrolysis liquid water phase into the evaporation and concentration section through a liquid adding port of the evaporation and concentration section, starting a heating sleeve and a wall scraping type stirring paddle to perform evaporation and concentration, separating sodium salt out, and discharging steam through a sealing cover and an exhaust port; after evaporation and concentration are finished, a valve of a concentration discharge hole is opened, concentrated solution enters a filtering section, filtered by a filtering layer, precipitated sodium salt is filtered to the filtering layer, recovered alkali liquor enters a liquid storage cavity below the filtering layer, and when the alkali concentration meets the alkali hydrolysis reaction requirement, the recovered alkali liquor is conveyed from the liquid outlet to the alkali hydrolysis reactor through an alkali liquor inlet.
Example 3
This embodiment differs from embodiment 2 only in that a vacuum suction port 234 is provided on the sidewall of the cylindrical housing 231 below the filter layer.
In the embodiment, the vacuumizing port is arranged below the filter layer, so that the filter efficiency of the filter layer is improved. In the operation process of the device, after the filtration is started, the vacuumizing port is opened for vacuumizing, so that the filtration efficiency is improved.
Example 4
The difference between this embodiment and embodiment 3 is that the evaporation and concentration section 22 is provided with a backflow liquid port 227, and the liquid outlet 21 of the liquid storage cavity 24 is communicated with the backflow liquid port 227.
In the embodiment, a reflux liquid port is arranged at the evaporation and concentration section and is communicated with a liquid outlet of the liquid storage cavity, so that the circulating evaporation and concentration can be conveniently realized; when the concentration of the concentrated recovered alkali liquor obtained by primary evaporation concentration and filtration does not meet the alkaline hydrolysis reaction requirement, the recovered alkali liquor in the liquid storage cavity can be output from the liquid outlet and conveyed into the evaporation concentration section through the reflux liquid outlet for secondary evaporation concentration and filtration, so that the control of evaporation concentration and filtration processes is increased.
The applicant declares that the above is only a specific embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and it should be apparent to those skilled in the art that any changes or substitutions that are easily conceivable within the technical scope of the present utility model disclosed by the present utility model fall within the scope of the present utility model and the disclosure.
Claims (10)
1. An alkaline hydrolysis device for preparing a photoinitiator is characterized by comprising an alkaline hydrolysis reactor and an evaporation filter which are communicated;
the alkaline hydrolysis liquid water phase outlet of the alkaline hydrolysis reactor is communicated with the liquid adding port of the evaporation filter, and the liquid outlet of the evaporation filter is communicated with the alkaline liquid inlet of the alkaline hydrolysis reactor.
2. The alkaline hydrolysis apparatus of claim 1, wherein the evaporation filter comprises an evaporation concentration section, a filtration section and a liquid storage chamber which are sequentially communicated.
3. The alkaline hydrolysis apparatus of claim 2, wherein the evaporative concentration section is located above the filtration section.
4. The alkaline hydrolysis apparatus of claim 3, wherein the evaporation and concentration section comprises a funnel-shaped shell, a concentration discharge port is arranged at the bottom of the funnel-shaped shell, a valve is arranged at the concentration discharge port, and the concentration discharge port is communicated with the filtering section.
5. The alkaline hydrolysis device according to claim 4, wherein a sealing cover is arranged at an opening at the upper end of the funnel-shaped shell in the evaporation concentration section, a liquid adding opening and an air outlet are arranged on the sealing cover, and the liquid adding opening is communicated with an alkaline hydrolysis liquid water phase outlet of the alkaline hydrolysis reactor;
and a heating sleeve is arranged outside the funnel-shaped shell in the evaporation and concentration section.
6. The alkaline hydrolysis apparatus of claim 4, wherein a wall scraping type stirring paddle is arranged inside the funnel-shaped shell in the evaporation and concentration section.
7. The alkaline hydrolysis apparatus of claim 4, wherein the filter section comprises an inverted funnel-shaped housing at an upper portion and a cylindrical housing at a lower portion;
the upper end opening of the inverted funnel-shaped shell is connected with a concentration discharge port of the evaporation concentration section;
the lower end opening of the inverted funnel-shaped shell is connected with the upper end opening of the cylindrical shell;
a filter layer is arranged in the cylindrical shell along the horizontal direction;
the lower end opening of the cylindrical shell is communicated with a liquid storage cavity, a liquid outlet is formed in the bottom of the liquid storage cavity, and the liquid outlet is communicated with an alkali liquor inlet of the alkaline hydrolysis reactor.
8. The alkaline hydrolysis apparatus according to claim 7, wherein a salt outlet is provided in a side wall of the cylindrical housing at a position corresponding to the filter layer.
9. The alkaline hydrolysis apparatus of claim 7, wherein a vacuum port is provided on a sidewall of the cylindrical housing below the filter layer.
10. The alkaline hydrolysis apparatus of claim 7, wherein the evaporation and concentration section is provided with a reflux liquid port, and a liquid outlet of the liquid storage cavity is communicated with the reflux liquid port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223256950.XU CN218924684U (en) | 2022-12-06 | 2022-12-06 | Alkaline hydrolysis device for preparing photoinitiator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223256950.XU CN218924684U (en) | 2022-12-06 | 2022-12-06 | Alkaline hydrolysis device for preparing photoinitiator |
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| CN218924684U true CN218924684U (en) | 2023-04-28 |
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| CN202223256950.XU Active CN218924684U (en) | 2022-12-06 | 2022-12-06 | Alkaline hydrolysis device for preparing photoinitiator |
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