Equipment for removing anisole from circulating methanol

Abstract

The utility model discloses equipment for removing anisole from circulating methanol, which comprises a tank body and a mixer, a plurality of baffle plates are sequentially arranged in the tank body from the mixer end to the other end, the baffle plates have three types, the left side of the baffle plate I is provided with a notch, the right side of the baffle plate II is provided with a notch, and the upper part of the baffle plate III is provided with a notch; the first baffle and the second baffle are distributed at intervals, and the third baffle is arranged at the last. The equipment disclosed by the utility model is simple in structure, easy to operate, good in removal effect of anisole in circulating methanol, friendly in production environment and low in production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of anisole separation, in particular to a device for removing anisole from circulating methanol in a phenol-methanol alkylation process. Background Art

[0002] Cresol is an important fine chemical intermediate, including three isomers, namely o-cresol, p-cresol and m-cresol. It is widely used in pesticides, medicines, fragrances, dyes, antioxidants, inhibitors, UV absorbers, fuel additives, rubber additives, coatings, feed additives and synthetic materials.

[0003] At present, o-cresol is mainly produced in industry by the phenol-methanol alkylation process, using metal oxides as catalysts. In addition to the production of o-cresol and 2,6-dimethylphenol products, the alkylation reaction of phenol and methanol also produces a small amount of by-products, anisole and water. In the actual production process of industrial equipment, since methanol, anisole and water form azeotropes during the distillation process, anisole accumulates continuously in the circulating methanol. A large amount of anisole not only has a great impact on the actual production load of the equipment and increases energy consumption, but also increases the consumption of phenol and methanol, and increases the unit product production cost, which seriously affects the economic benefits of the equipment. Therefore, it is necessary to effectively remove anisole from the circulating methanol. Summary of the invention

[0004] The utility model aims to provide a device for removing anisole from circulating methanol in a phenol-methanol alkylation process. The device is simple, easy to operate, has good anisole removal effect, is environmentally friendly and has low production cost.

[0005] The technical solution adopted by the utility model is:

[0006] A device for removing anisole from circulating methanol comprises a tank body and a mixer, wherein the tank body is provided with a material inlet, a light material outlet, a heavy material outlet and an exhaust port, the mixer is arranged at one end of the upper part of the tank body, a plurality of baffles are arranged in sequence from the mixer end to the other end of the tank body, the baffles are of three types, wherein baffle one has a notch on the left side, baffle two has a notch on the right side, and baffle three has a notch on the top, baffle one and baffle two are distributed at intervals, so that the material flows in the tank body in an "S" shape, and baffle three is arranged at the end.

[0007] The three upper notches of the baffle are V-shaped, sawtooth-shaped or wavy-shaped.

[0008] The mixer is mainly used for mixing liquid-liquid substances and adopts a Venturi mixer commonly used in the market, which can be arranged outside or inside the tank.

[0009] The mixer consists of a container and two parallel pipes. A number of small holes are distributed in the pipes. The mixer is arranged inside the tank, and the two pipes are respectively connected to the material inlets.

[0010] The number of the first baffle and the second baffle can be determined according to the actual separation requirements, and they can be the same or the number of the first baffle is more than that of the second baffle.

[0011] The number of the first baffle is 1 - 7 pieces, and the number of the second baffle is 1 - 6 pieces. Preferably, the number of the first baffle is 4 - 5 pieces, and the number of the second baffle is preferably 3 - 4 pieces.

[0012] A method for removing anisole from recycled methanol by using the equipment is characterized by comprising the following steps:

[0013] S1: The methanol material containing anisole and water and the solvent enter the tank after being mixed, and flow in an "S" shape in the tank. After a certain period of time, a light-phase material and a heavy-phase material are formed. The light-phase material containing methanol is discharged from the light-material outlet, and the heavy-phase material containing anisole is discharged from the heavy-material outlet;

[0014] S2: The light-phase methanol material discharged from the light-material outlet returns to the batching tank for recycling;

[0015] S3: The heavy-phase material containing anisole discharged from the heavy-material outlet is sent to the anisole storage tank.

[0016] The solvent refers to a polar solvent or a composite solvent composed of a polar solvent and a surfactant. The polar solvent includes water, methanol, etc., and the surfactant is preferably a non-ionic surfactant.

[0017] The present utility model has the following beneficial effects:

[0018] The equipment of the present utility model has a simple structure, is easy to operate, has a good effect on removing anisole from recycled methanol, reduces the energy consumption of the device, significantly reduces the production cost, and has good economic benefits. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model.

[0020] Figure 2 is Figure 1 a side view of

[0021] Figure 3 is a schematic structural diagram of the first baffle.

[0022] Figure 4 is a schematic structural diagram of the second baffle.

[0023] Figure 5 is a schematic structural diagram of the third baffle.

[0024] In the figure: 1, tank body; 2, inlet for material A; 3, inlet for material B; 4, mixer; 5, baffle one; 6, baffle two; 7, baffle three; 8, outlet for light substances; 9, outlet for heavy substances; 10, exhaust port; 11, support leg; 12, sight glass; 13, pipeline A; 14, pipeline B. Specific implementation manner

[0025] The following details the specific implementation manner of the present utility model. It should be understood that the specific implementation manner described herein is only used to illustrate and explain the present utility model, and is not used to limit the present utility model.

[0026] From Figure 1 It can be seen that an apparatus for removing anisole from circulating methanol of the present utility model includes a tank body 1 and a mixer 4. The upper part of the tank body 1 is designed with an inlet for material A 2, an inlet for material B 3 and an exhaust port 10. The lower part of the tank body 1 has an outlet for heavy substances 9 and a support leg 13. The upper middle part of the tank body 1 has an outlet for light substances 8. There is also a sight glass 12 in the middle part of the tank body 1, and the sight glass 12 is on the opposite side of the outlet for light substances 8.

[0027] The mixer 4 is arranged inside the tank body 1 and is composed of a pipeline A 13 and a pipeline B 14. There are several small holes on the pipeline A 13 and the pipeline B 14 respectively. The pipeline A 13 is connected to the inlet for material A 2, and the pipeline B 14 is connected to the inlet for material B 3.

[0028] From Figure 2 - Figure 5 It can be seen that there are also three kinds of baffles inside the tank body 1. There is a notch on the left side of the baffle one, a notch on the right side of the baffle two, and a V-shaped, serrated or wavy notch on the upper part of the baffle three. The baffle one and the baffle two are arranged at intervals, so that the material flows in an "S" shape inside the tank body, which can extend the residence time of the material inside the tank body 1 and ensure better separation of light and heavy substances. The baffle three is arranged at the rearmost part inside the tank body 1, and the light-phase material flows out from the upper part of the baffle three and flows out through the outlet for light substances. There are notches designed at the bottom of the baffle one, the baffle two and the baffle three respectively, and the heavy-phase material flows through the notches and is discharged through the outlet for heavy substances.

[0029] The number of the baffle one and the baffle two is the same or the number of the baffle one is 2 more than that of the baffle two. The number of the baffle one is 1 - 7 pieces, and the number of the baffle two is 1 - 6 pieces. The baffle one is preferably 4 - 5 pieces, and the number of the baffle two is preferably 3 - 4 pieces.

[0030] A method for removing anisole from circulating methanol by using the apparatus of the present utility model includes the following steps:

[0031] S1: The methanol material containing anisole and water is mixed with a solvent and then enters the tank, flowing in an "S" shape in the tank. After a certain period of time, a light-phase material and a heavy-phase material are formed. The light-phase material containing methanol is discharged from the light-material outlet, and the heavy-phase material containing anisole is discharged from the heavy-material outlet.

[0032] S2: The light-phase material containing methanol discharged from the light-material outlet returns to the batching tank for recycling.

[0033] S3: The heavy-phase material containing anisole from the heavy-material outlet is sent to the anisole storage tank.

[0034] The solvent refers to a polar solvent or a composite solvent composed of a polar solvent and a surfactant. The polar solvents include water, methanol, etc., and the surfactant is preferably a non-ionic surfactant.

[0035] Using the equipment with the structure of the present utility model, anisole can be removed from the material containing anisole, water and methanol, so as to realize the rapid separation of anisole and methanol.

[0036] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A device for removing anisole from circulating methanol, characterized in that: The invention comprises a tank body and a mixer, wherein the tank body is provided with a material inlet, a light material outlet, a heavy material outlet and an exhaust port, the mixer is arranged at one end of the upper part of the tank body, and a plurality of baffles are arranged in sequence from the mixer end to the other end of the tank body, wherein the baffles are of three types, wherein baffle one has a notch on the left side, baffle two has a notch on the right side, and baffle three has a notch on the top, baffle one and baffle two are distributed at intervals, so that the material flows in an "S" shape in the tank body, and baffle three is arranged at the end.

2. A device for removing anisole from circulating methanol according to claim 1, characterized in that: The three upper notches of the baffle are V-shaped, sawtooth-shaped or wavy-shaped.

3. A device for removing anisole from circulating methanol according to claim 1, characterized in that: The mixer is a commonly used mixer on the market and is arranged outside or inside the tank.

4. A device for removing anisole from circulating methanol according to claim 1, characterized in that: The mixer is composed of a container and two parallel pipes, each of which is provided with a plurality of small holes. The mixer is arranged in a tank body, and the two pipes are respectively connected to material inlets.

5. A device for removing anisole from circulating methanol according to claim 1, characterized in that: The number of baffle plates 1 is the same as that of baffle plates 2, or the number of baffle plates 1 is greater than that of baffle plates 2.

6. A device for removing anisole from circulating methanol according to claim 5, characterized in that: The number of baffle plates 1 is 1 to 7, and the number of baffle plates 2 is 1 to 6.

7. A device for removing anisole from circulating methanol according to claim 6, characterized in that: Baffle 1 consists of 4 to 5 pieces, and baffle 2 consists of 3 to 4 pieces.

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