CN217699223U - Catalyst alcohol washing equipment for producing anthraquinone and 2-alkyl anthraquinone - Google Patents
Catalyst alcohol washing equipment for producing anthraquinone and 2-alkyl anthraquinone Download PDFInfo
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- CN217699223U CN217699223U CN202221823242.7U CN202221823242U CN217699223U CN 217699223 U CN217699223 U CN 217699223U CN 202221823242 U CN202221823242 U CN 202221823242U CN 217699223 U CN217699223 U CN 217699223U
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Abstract
The application discloses catalyst alcohol washing equipment for producing anthraquinone and 2-alkylanthraquinone, which comprises an alcohol washing liquor circulating tank, an alcohol washing liquor intermediate tank, an ethanol flash tank, a flash evaporation ethanol condenser and an ethanol storage tank; a first inlet of the alcohol washing liquid circulating tank is connected with an ethanol storage tank, a second inlet of the alcohol washing liquid circulating tank is connected with an outlet of the ethanol storage tank, a first outlet of the alcohol washing liquid circulating tank is connected with a tower top inlet of a reactor outside the equipment, and a second outlet of the alcohol washing liquid circulating tank is connected with a first inlet of the alcohol washing liquid intermediate tank; an inlet at the upper end of the ethanol flash tank is connected with an outlet of the intermediate tank of the alcohol washing liquid, an outlet at the upper end of the ethanol flash tank is connected with the ethanol storage tank through the flash evaporation ethanol condenser, and an outlet at the lower end of the ethanol flash tank discharges materials; and a second inlet of the alcohol washing liquid intermediate tank is connected with a tower bottom outlet of the reactor outside the equipment. The method can be used for circularly washing the reacted solid acid catalyst with alcohol. The system can further comprise a secondary ethanol condenser, so that all ethanol tail gas is collected, and the system is more environment-friendly.
Description
Technical Field
The application relates to alcohol washing equipment, belongs to the field of chemical production equipment, and particularly relates to catalyst alcohol washing equipment for producing anthraquinone and 2-alkylanthraquinone.
Background
In industry, anthraquinone and 2-alkyl anthraquinone are mainly applied to the synthesis of hydrogen peroxide or used as intermediates of some dyes, and have important application in the fields of photosensitivity and photocatalysis. At present, large-scale hydrogen peroxide manufacturers at home and abroad adopt a dehydration closed-loop production mode with fuming sulfuric acid as a catalyst. However, this method has a great problem of three wastes emission because fuming sulfuric acid is used. Therefore, today, the environmental requirements are becoming stricter, and the market needs are not satisfied.
The solid-liquid reaction process using solid acid as catalyst is gradually concerned by the advantages of simple production process, low investment, no three-waste discharge, high product purity and the like, and some manufacturers have started to put into production, but the method has the following defects in actual industrial production: a large amount of anthraquinone and 2-alkyl anthraquinone products can be adsorbed in the pore channels and on the surface of the used solid acid catalyst, and account for about 20-30% of the mass of the catalyst, so that the production efficiency is reduced, and the pore channels of the catalyst are blocked, so that the catalyst is inactivated. In order to cope with this drawback, the prior art has been to restore the activity of the catalyst by calcining it, but this also causes the products adsorbed on the catalyst to be decomposed by calcining, causing losses.
SUMMERY OF THE UTILITY MODEL
The application aims to provide catalyst alcohol washing equipment for producing anthraquinone and 2-alkylanthraquinone, which can effectively wash anthraquinone and 2-alkylanthraquinone adsorbed on the pore and the surface of a catalyst.
The catalyst alcohol washing device for producing anthraquinone and 2-alkyl anthraquinone comprises: an alcohol washing liquid circulating tank, an alcohol washing liquid intermediate tank, an ethanol flash tank, a flash evaporation ethanol condenser and an ethanol storage tank.
The alcohol washing liquid circulating tank is used for providing temporary storage for alcohol washing liquid circulation. The first inlet of the device is connected with an ethanol storage tank, the second inlet of the device is connected with the outlet of the ethanol storage tank, the first outlet of the device is connected with the inlet of the top of the reactor outside the device, and the second outlet of the device is connected with the first inlet of the middle tank of the alcohol washing liquid.
An inlet at the upper end of the ethanol flash tank is connected with an outlet of the alcohol washing liquid intermediate tank; an upper end outlet is connected with the ethanol storage tank through the flash evaporation ethanol condenser and is used for carrying out flash evaporation firstly and then cooling and liquefying the distilled ethanol gas so as to separate ethanol and 2-ethyl anthraquinone products; the outlet at the lower end of the discharging pipe is used for discharging the 2-ethyl anthraquinone product. The ethanol storage tank is used for temporarily storing the condensed ethanol.
The alcohol washing liquid intermediate tank is used for providing storage in the middle of treatment for the alcohol washing liquid. The second inlet of which is connected to the bottom outlet of the reactor outside the apparatus.
Further, an ethanol pump is arranged between the first outlet of the alcohol washing liquid circulating tank and the inlet of the top of the reactor outside the device.
Further, an alcohol washing liquid circulating pump is arranged between the second outlet of the alcohol washing liquid circulating tank and the first inlet of the alcohol washing liquid intermediate tank.
Preferably, the apparatus further comprises: the vacuum pump inlet condenser and the ethanol vacuum liquid receiving tank are connected, wherein an inlet of the vacuum pump inlet condenser is connected with a tower bottom outlet of the reactor outside the equipment, and an outlet of the ethanol vacuum liquid receiving tank is connected with a first inlet of the alcohol washing liquid intermediate tank.
Preferably, the apparatus further comprises: and the first ethanol condenser is used for absorbing and condensing the ethanol tail gas in the intermediate tank of the alcohol washing liquid, the outlet at the lower end of the first ethanol condenser is connected with the third inlet of the alcohol washing liquid circulating tank, and the first ethanol condenser is connected with the outlet at the upper end of the intermediate tank of the alcohol washing liquid.
Preferably, the apparatus further comprises: and the ethanol second condenser is used for absorbing and condensing the incompletely condensed ethanol tail gas in the ethanol storage tank and/or the ethanol first condenser, an inlet of the ethanol second condenser is connected with an outlet at the upper end of the ethanol storage tank, an outlet at the lower end of the ethanol second condenser is combined with an outlet pipeline at the lower end of the ethanol first condenser, and the ethanol second condenser is connected to a third inlet of the alcohol washing liquid circulating tank.
Preferably, the alcohol washing liquid circulating tank is internally provided with a mechanical stirrer, and the outside of the alcohol washing liquid circulating tank is provided with a heating jacket.
Preferably, the middle tank of the alcohol washing liquid is internally provided with a mechanical stirrer, and the outside of the middle tank is provided with a heating jacket.
Preferably, a heating jacket is arranged outside the ethanol flash tank.
The beneficial effects that this application can produce include:
1) The catalyst alcohol washing equipment provided by the application can carry out circulating alcohol washing on the reacted solid acid catalyst, and can wash out more than 95% of anthraquinone and 2-alkyl anthraquinone adsorbed in a catalyst pore channel and on the surface of the catalyst pore channel;
2) The catalyst alcohol washing equipment provided by the application can comprise a secondary ethanol condenser, so that the whole collection of ethanol tail gas is ensured, and the emission of waste gas is reduced or avoided;
3) The catalyst alcohol washing equipment provided by the application has the advantages of low production energy consumption, low requirement on environment, low investment and high relative income value.
Drawings
FIG. 1 is a schematic diagram showing the structure of a catalyst alcohol washing apparatus for producing anthraquinones and 2-alkylanthraquinones according to an embodiment of the present application.
List of parts and reference numerals: 1-a vacuum pump inlet condenser, a 2-ethanol vacuum liquid receiving tank, a 3-ethanol washing liquid intermediate tank, a 4-ethanol flash tank, a 5-flash ethanol condenser, a 6-ethanol storage tank, a 7-ethanol first condenser, an 8-ethanol second condenser, a 9-ethanol washing liquid circulating tank, a 10-ethanol washing liquid circulating pump and an 11-ethanol pump.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
Referring to FIG. 1, there is shown a catalyst alcohol washing apparatus for producing anthraquinones and 2-alkylanthraquinones, comprising: an alcohol washing liquid circulating tank 9, an alcohol washing liquid intermediate tank 3, an ethanol flash tank 4, a flash evaporation ethanol condenser 5 and an ethanol storage tank 6. The ethanol storage tank is connected with a first inlet of the alcohol washing liquid circulating tank 9, and a first outlet of the alcohol washing liquid circulating tank 9 is connected with a tower top inlet of the reactor outside the device. The outlet at the bottom of the reactor is connected with a vacuum pump inlet condenser 1, and is connected with a second inlet of the alcohol washing liquid intermediate tank 3 through an ethanol vacuum liquid receiving tank 2.
In one embodiment, the upper outlet of the intermediate tank 3 of the alcohol washing solution is connected with a first condenser 7 of ethanol, the lower outlet is connected with an ethanol flash tank 4, the lower outlet of the ethanol flash tank 4 is used for discharging, and the upper outlet is connected with an ethanol storage tank 6 through a flash ethanol condenser 5.
In one embodiment, the ethanol storage tank 6 is connected at its upper outlet to the second ethanol condenser 8 and at its lower outlet to the second inlet of the alcohol wash recycle tank 9. And a second outlet of the alcohol washing liquid circulating tank 9 is connected with an inlet 1 of the alcohol washing liquid intermediate tank. An outlet at the upper end of the ethanol first condenser 7 is connected with the ethanol second condenser 8, and an outlet at the lower end of the ethanol first condenser is combined with an outlet pipeline at the lower end of the ethanol second condenser 8 and is connected with an inlet 3 of the alcohol washing liquid circulating tank.
In one embodiment, an alcohol washing solution circulating pump 10 is provided between the second outlet of the alcohol washing solution circulating tank 9 and the inlet 1 of the alcohol washing solution intermediate tank.
In one embodiment, an ethanol pump 11 is provided between the first outlet of the alcohol wash recycle tank 9 and the reactor overhead inlet.
In one embodiment, the alcohol wash solution intermediate tank 3 is equipped with a mechanical stirrer.
In one embodiment, the alcohol wash liquor recycle tank 9 is equipped with a mechanical agitator.
In one embodiment, the intermediate tank 3 for the alcohol wash is jacketed with a heating jacket.
In one embodiment, the ethanol flash tank 4 is jacketed with a heating jacket.
In one embodiment, the alcohol wash liquor circulation tank 9 is jacketed by a heating jacket.
The specific working process of the catalyst alcohol washing equipment for producing anthraquinone and 2-alkyl anthraquinone in the application is as follows:
the ethanol solution in the ethanol storage tank enters an ethanol washing liquid circulating tank 9 after being quantified, enters an inlet at the top of an external reactor through an ethanol pump 11, fully contacts and cleans a catalyst in a heating state, and then enters an ethanol washing liquid into an inlet condenser 1 of an ethanol vacuum pump through an outlet at the bottom of the reactor for cooling and condensation. And the cooled alcohol solution enters an ethanol vacuum liquid receiving tank 2, is pumped into an alcohol washing solution intermediate tank 3 by using pressure difference, is heated and stirred again, and prevents solid from being separated out. And after the solid is completely dissolved, the solid enters an ethanol flash tank 4, stirring and heating are carried out, and the distilled ethanol gas enters an ethanol storage tank 6 after being cooled and liquefied by a flash ethanol condenser 5. After the ethanol in the ethanol storage tank 6 reaches a certain amount, the ethanol is introduced into the alcohol washing liquid circulating tank 9, and is pumped into the alcohol washing liquid intermediate tank 3 through the alcohol washing liquid circulating pump 10 to be dissolved and flashed again. Ethanol tail gas in the intermediate tank 3 of the alcohol washing liquid is absorbed by the first condenser 7 of ethanol and enters the circulating tank 9 of the alcohol washing liquid; the ethanol tail gas which is not completely condensed in the ethanol storage tank 6 and the ethanol first condenser 7 enters the ethanol second condenser 8, and the ethanol second condenser 8 absorbs and condenses the tail gas and then enters the alcohol washing liquid circulating tank 9. And repeatedly distilling for several times in this way, completely separating the ethanol and the 2-ethyl anthraquinone crude product, discharging the 2-ethyl anthraquinone crude product through a discharge opening of the ethanol flash tank 4, and enabling the ethanol solution to enter the reactor again through an ethanol pump 11 by virtue of an ethanol solution circulating tank 9 to start the next catalyst cleaning. Compared with the prior art, if the mass increase rate of the catalyst is less than 2 percent after cleaning, the quality requirement that the anthraquinone and the alkylanthraquinone are cleaned by more than 95 percent of the pore canals and the surface of the catalyst is achieved.
The present application is not limited to the connection relationship of fig. 1 and some limitations in the above description, for example, two condensers are combined into one, which is the protection scope of the present invention.
Although the present invention has been described with reference to a few preferred embodiments, it should be understood that various changes and modifications can be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A catalyst alcohol washing device for producing anthraquinone and 2-alkyl anthraquinone is characterized by comprising an alcohol washing liquid circulating tank, an alcohol washing liquid intermediate tank, an ethanol flash tank, a flash evaporation ethanol condenser and an ethanol storage tank; wherein, the first and the second end of the pipe are connected with each other,
a first inlet of the alcohol washing liquid circulating tank is connected with an ethanol storage tank, a second inlet of the alcohol washing liquid circulating tank is connected with an outlet of the ethanol storage tank, a first outlet of the alcohol washing liquid circulating tank is connected with a tower top inlet of a reactor outside the equipment, and a second outlet of the alcohol washing liquid circulating tank is connected with a first inlet of the alcohol washing liquid intermediate tank;
an inlet at the upper end of the ethanol flash tank is connected with an outlet of the intermediate tank of the alcohol washing liquid, an outlet at the upper end of the ethanol flash tank is connected with the ethanol storage tank through the flash evaporation ethanol condenser, and an outlet at the lower end of the ethanol flash tank discharges materials;
and a second inlet of the alcohol washing liquid intermediate tank is connected with a tower bottom outlet of the reactor outside the equipment.
2. The catalyst alcohol washing apparatus for the production of anthraquinones and 2-alkylanthraquinones according to claim 1, wherein an alcohol pump is provided between the first outlet of the alcohol washing liquid circulation tank and an inlet at the top of the reactor outside the apparatus.
3. The catalyst alcohol washing apparatus for the production of anthraquinones and 2-alkylanthraquinones according to claim 1, wherein an alcohol washing liquid circulating pump is provided between the second outlet of the alcohol washing liquid circulating tank and the first inlet of the alcohol washing liquid intermediate tank.
4. The catalyst alcohol washing apparatus for the production of anthraquinones and 2-alkylanthraquinones according to claim 1, wherein the apparatus further comprises: and the vacuum pump inlet condenser and the ethanol vacuum liquid receiving tank are connected, wherein the inlet of the vacuum pump inlet condenser is connected with the outlet at the bottom of the reactor outside the equipment, and the outlet of the ethanol vacuum liquid receiving tank is connected with the first inlet of the alcohol washing liquid intermediate tank.
5. The catalyst alcohol washing apparatus for the production of anthraquinones and 2-alkylanthraquinones according to claim 1, wherein the apparatus further comprises: and an outlet at the lower end of the first ethanol condenser is connected with a third inlet of the alcohol washing liquid circulating tank, and the first ethanol condenser is connected with an outlet at the upper end of the alcohol washing liquid intermediate tank.
6. The catalyst alcohol washing apparatus for the production of anthraquinones and 2-alkylanthraquinones according to claim 5, wherein the apparatus further comprises: and an inlet of the second ethanol condenser is connected with an outlet at the upper end of the ethanol storage tank, and an outlet at the lower end of the second ethanol condenser is combined with an outlet pipeline at the lower end of the first ethanol condenser and is connected to a third inlet of the alcohol washing liquid circulating tank.
7. The catalyst alcohol washing apparatus for the production of anthraquinones and 2-alkylanthraquinones according to claim 1, wherein the alcohol washing liquid circulating tank is internally provided with a mechanical stirrer, and externally provided with a heating jacket.
8. The catalyst alcohol washing apparatus for the production of anthraquinones and 2-alkylanthraquinones according to claim 1, wherein the inside of the intermediate tank for the alcohol washing solution is provided with a mechanical stirrer, and the outside thereof is provided with a heating jacket.
9. The catalyst alcohol washing apparatus for the production of anthraquinones and 2-alkylanthraquinones according to claim 1, wherein a heating jacket is provided outside the ethanol flash tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221823242.7U CN217699223U (en) | 2022-07-15 | 2022-07-15 | Catalyst alcohol washing equipment for producing anthraquinone and 2-alkyl anthraquinone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221823242.7U CN217699223U (en) | 2022-07-15 | 2022-07-15 | Catalyst alcohol washing equipment for producing anthraquinone and 2-alkyl anthraquinone |
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| Publication Number | Publication Date |
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| CN217699223U true CN217699223U (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221823242.7U Active CN217699223U (en) | 2022-07-15 | 2022-07-15 | Catalyst alcohol washing equipment for producing anthraquinone and 2-alkyl anthraquinone |
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| Country | Link |
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| CN (1) | CN217699223U (en) |
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2022
- 2022-07-15 CN CN202221823242.7U patent/CN217699223U/en active Active
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