Production device capable of preventing diphenylmethane from being emulsified

Abstract

The utility model discloses a production device capable of preventing diphenylmethane from being emulsified, which comprises a reaction kettle, a phase splitting kettle, an acid storage tank, a scraper filter, an alkali liquor recovery tank, a configuration tank, a distillation tower and a rectifying tower, the outlet of the reaction kettle is communicated with the inlet of the phase splitting kettle, and the inlet of the phase splitting kettle is also communicated with the outlet of the configuration tank; an outlet of the split-phase kettle is respectively communicated with an acid storage tank and a scraper filter, an outlet of the scraper filter is respectively communicated with inlets of an alkali liquor recovery tank and a distillation tower, an outlet of the alkali liquor recovery tank is communicated with an inlet of the split-phase kettle, and an outlet of the distillation tower is communicated with an inlet of a rectifying tower; according to the utility model, the oil phase is neutralized by liquid alkali liquor prepared from industrial salt and solid alkali, so that the oil phase is prevented from being emulsified, and meanwhile, the alkali liquor is recycled.

Description

Technical Field

[0001] The utility model relates to a chemical production device, in particular to a production device for preventing diphenylmethane from emulsifying. Background Art

[0002] Diphenylmethane is commonly known as artificial geranium oil. It is a colorless needle-shaped crystal at room temperature with a strong aroma of geranium oil. It is an important intermediate for spices, fuels and drugs. It is used as an important intermediate raw material in the pharmaceutical and fine chemical industries. It is widely used in the production of diphenhydramine hydrochloride in medicine, and is often used as a synergist for pesticides and insecticides or as an additive to change the thermal stability of polyester and jet fuel in fine chemicals. In recent years, due to the increase in demand for diphenylmethane-related manufacturing products, the market demand for diphenylmethane has expanded, and its industry has good market prospects and significant economic benefits.

[0003] At present, the industry often uses benzene and benzyl alcohol to generate diphenylmethane through alkylation under suitable reaction conditions and catalysis. The catalyst type of this process is mainly liquid acid or solid strong acid, and solid alkali or liquid alkali is mainly used for oil phase neutralization. There are problems such as oil phase emulsification and complex product post-processing process in industrial production. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a production device that prevents diphenylmethane from emulsification.

[0005] According to the technical solution provided in the embodiments of this application,

[0006] The production device for preventing diphenylmethane from emulsifying comprises a reaction kettle, a phase separation kettle, an acid storage tank, a scraper filter, an alkali solution recovery tank, a configuration tank, a distillation tower and a rectification tower, wherein the outlet of the reaction kettle is connected with the inlet of the phase separation kettle, the inlet of the phase separation kettle is also connected with the outlet of the configuration tank, the outlet of the phase separation kettle is respectively connected with the acid storage tank and the scraper filter, the outlet of the scraper filter is respectively connected with the inlet of the alkali solution recovery tank and the distillation tower, the outlet of the alkali solution recovery tank is connected with the inlet of the phase separation kettle, the outlet of the distillation tower is connected with the inlet of the rectification tower, the reaction kettle and the phase separation kettle are both provided with propeller agitators, and the rectification tower is provided with a nitrogen pipe.

[0007] Furthermore, the alkali solution in the configuration tank flows into the phase separation kettle by gravity.

[0008] Furthermore, the alkali solution used for neutralization in the utility model is a solution prepared from industrial salt and solid alkali.

[0009] Furthermore, the scraper filter adopts a solid-liquid separator and has an automatic cleaning function.

[0010] In summary, the beneficial effects of the present application are as follows: the alkali solution used for neutralization in the utility model is a solution prepared from industrial salt and solid alkali, which avoids the problems of oil phase emulsification and complicated product post-processing process; the scraper filter is provided with an automatic backwashing function, which effectively avoids the problems of easy clogging of the filter and the need for frequent disassembly and cleaning during the production process; the reactor uses a propeller agitator to increase the contact area between the liquid acid and the reaction materials, thereby improving the conversion rate and selectivity of the reaction; the distillation tower is equipped with a nitrogen pipeline, which improves the stability of the negative pressure operation, and the alkali solution recovery tank can realize the recycling of the liquid alkali solution; the industrial salt and solid alkali are configured in the configuration tank, so that the configured alkali solution enters the phase separation kettle by gravity, thereby reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] Numbers in the figure: reaction kettle-1, phase separation kettle-2, acid storage tank-3, alkali solution recovery tank-4, scraper filter-5, distillation tower-6, rectification tower-7, configuration tank-8. DETAILED DESCRIPTION

[0014] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0015] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0016] like Figure 1 As shown, a production device for preventing diphenylmethane from emulsifying comprises a reactor 1, a phase-separation reactor 2, an acid storage tank 3, a scraper filter 5, an alkali solution recovery tank 4, a configuration tank 8, a distillation tower 6 and a rectification tower 7, wherein the outlet of the reactor 1 is connected to the inlet of the phase-separation reactor 2, the reactor 1 and the phase-separation reactor 2 are both provided with a propeller agitator, the inlet of the phase-separation reactor 2 is also connected to the outlet of the configuration tank 8, the outlet of the phase-separation reactor 1 is respectively connected to the acid storage tank 3 and the scraper filter 5, the outlet of the scraper filter 5 is respectively connected to the inlet of the alkali solution recovery tank 4 and the distillation tower 6, the outlet of the alkali solution recovery tank 4 is connected to the inlet of the phase-separation reactor 2, the outlet of the distillation tower 6 is connected to the inlet of the rectification tower 7, and the rectification tower 7 is provided with a nitrogen pipe.

[0017] Here’s how it works:

[0018] like Figure 1 As shown, the production system for preventing diphenylmethane from emulsification uses benzene and benzyl alcohol as raw materials to produce diphenylmethane under the action of a liquid acid catalyst. First, the diphenylmethane reaction liquid generated by the reaction in the reactor 1 enters the phase separation reactor 2, and the phase separation and neutralization operations are performed in the phase separation reactor 2. The oil phase after phase separation and neutralization enters the scraper filter 5, the distillation tower 6, and the rectification tower 7 in sequence, and finally the product diphenylmethane is obtained. A propeller stirrer is configured in the reactor 1 to increase the contact area between the liquid acid and the reaction material, and to improve the conversion rate and selectivity of the reaction; after the reaction liquid is cooled to 60 degrees, the material is transferred to the phase separation reactor 2, and after standing and stratifying, the acid-containing aqueous phase enters the acid storage tank 3 through a pipeline, and the outlet of the acid storage tank 3 is connected to the inlet of the reactor 1, realizing the recycling of the acid liquid; after standing and stratifying, the oil phase is gravity-flowed into the prepared alkali solution through the configuration tank 8 to neutralize the acidity of the oil phase material. The alkali solution is configured with industrial salt and solid alkali in a certain proportion, avoiding the emulsification of the oil phase and the problem of complicated product post-processing process. After the pH value of the material is neutral or weakly alkaline, the lower aqueous phase material enters the scraper filter 5 to filter out the undissolved inorganic salts contained in the aqueous phase; the liquid coming out of the scraper filter 5 enters the alkali recovery tank 4, which is connected to the inlet of the phase separation kettle 2, realizing the recycling of the alkali solution; the upper oil phase enters the scraper filter 5 to filter out the undissolved alkali in the oil phase; the scraper filter is provided with a backwashing pipeline, which has high stability and is easy to clean; the oil phase enters the distillation tower 6 after passing through the scraper filter 5 to recover the solvent benzene; the distillation tower bottom liquid enters the rectification tower 7, which is equipped with a nitrogen pipeline, and the stability of the negative pressure operation is guaranteed by fine-tuning the nitrogen valve. The production system for preventing diphenylmethane emulsification proposed by the utility model can realize the industrial production of diphenylmethane, stable operation, recycling of alkali solution, and has good economic and environmental benefits.

[0019] The above description is only an explanation of the preferred embodiments of the present application and the technical principles and other schemes used. At the same time, the scope of the utility model involved in the present application is not limited to the technical scheme formed by a specific combination of the above technical features, but also includes other technical schemes formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) to form a technical scheme.

Claims

1. A production device for preventing diphenylmethane from emulsifying, comprising a reaction kettle (1), a phase separation kettle (2), an acid storage tank (3), a scraper filter (5), an alkali solution recovery tank (4), a configuration tank (8), a distillation tower (6) and a rectification tower (7), wherein: The outlet of the reaction kettle (1) is connected to the inlet of the phase separation kettle (2), the inlet of the phase separation kettle (2) is also connected to the outlet of the configuration tank (8), the outlet of the phase separation kettle (2) is respectively connected to the acid storage tank (3) and the scraper filter (5), the outlet of the scraper filter (5) is respectively connected to the inlet of the alkali solution recovery tank (4) and the distillation tower (6), the outlet of the alkali solution recovery tank (4) is connected to the inlet of the phase separation kettle (2), and the outlet of the distillation tower (6) is connected to the inlet of the rectification tower (7).

2. The production device for preventing diphenylmethane from emulsification according to claim 1, characterized in that: The reaction kettle (1) and the phase separation kettle (2) are both provided with a propeller stirrer.

3. The production device for preventing diphenylmethane emulsification according to claim 1, characterized in that: The distillation tower (7) is equipped with a nitrogen pipe.

4. The production device for preventing diphenylmethane emulsification according to claim 1, characterized in that: The alkali solution in the configuration tank (8) flows into the phase separation kettle (2) by gravity.

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