A device for improving the acidification efficiency of diethyl phenylmalonate

Abstract

This utility model relates to a device for improving the acidification efficiency of diethyl phenylmalonate. The technical solution is as follows: one side of the upper end of the acidification reactor is connected to a concentrated acid tank via a pipeline, and the other side is connected to a fresh water tank via a pipeline. A diethyl phenylmalonate storage tank is connected to the middle of the upper end of the acidification reactor via a pipeline and a first delivery pump. A cooling jacket is provided on the outer wall of the acidification reactor. A circulating cooling water storage tank is connected to the lower side of the cooling jacket via a pipeline, and a return water storage tank is connected to the upper side of the cooling jacket via a pipeline. The lower end of the concentrated acid tank is connected to a mixing tank via a pipeline. The beneficial effects are: this utility model solves the problem of long acidification time for diethyl phenylmalonate in the prior art, which affects the synthesis efficiency; the acidification reactor simultaneously sprays two materials, and cooling water is circulated in the cooling jacket for heat absorption, causing the acid solution to cool rapidly after preparation. This method can greatly reduce the acidification time, reduce heat release during preparation, and reduce the requirements for refrigerant.

Description

Technical Field

[0001] This utility model relates to the field of diethyl phenylmalonate acidification technology, and in particular to a device for improving the acidification efficiency of diethyl phenylmalonate. Background Technology

[0002] Diethyl phenylmalonate is a colorless liquid, insoluble in water, but miscible with most organic solvents such as ethanol, ether, and propylene glycol. Its boiling point (101.3 kPa) is 172 °C, melting point is 16 °C, and its density at room temperature (25 °C / 4 °C) is 1.095 g / cm³. The acidification process of diethyl phenylmalonate releases a large amount of heat during acid preparation. Current methods involve directly injecting the acid solution into water and using chilled brine to cool the equipment. This process results in a high temperature rise in the equipment, requiring high cooling capacity from the refrigerant, leading to high energy consumption and a long cooling time. Furthermore, it prevents the crude product from being immediately acidified after synthesis, resulting in a long production time. Excessive temperature during acidification can also cause material decomposition, producing other impurities that affect product purity and prolong the acidification time. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned deficiencies in the existing technology by providing a device for improving the acidification efficiency of diethyl phenylmalonate. The device first mixes and prepares the acid solution with fresh water, then rapidly lowers the acid solution temperature by introducing cooling water before feeding it into the crude diethyl phenylmalonate. This avoids the problems of excessively high temperatures during acidification causing material decomposition and the generation of other impurities, affecting product purity, and prolonging the acidification time.

[0004] The present invention discloses a device for improving the acidification efficiency of diethyl phenylmalonate. The technical solution includes: a concentrated acid tank (V110), a fresh water tank (V111), an acidification reactor (R5301), a diethyl phenylmalonate storage tank (V101), a return water storage tank (CWR), a circulating cooling water storage tank (CWS), a first transfer pump (P101), and a mixing tank (V201). One side of the upper end of the acidification reactor (R5301) is connected to the concentrated acid tank (V110) via a pipeline, and the other side is connected to the fresh water tank (V111) via a pipeline. At the upper end of the acidification reactor (R5301)... The middle section is connected to the diethyl phenylmalonate storage tank (V101) via pipeline and the first delivery pump (P101). A cooling jacket (R2) is provided on the outer wall of the acidification vessel (R5301). A circulating cooling water storage tank (CWS) is connected to the lower side of the cooling jacket (R2) via pipeline, and a return water storage tank (CWR) is connected to the upper side of the cooling jacket (R2) via pipeline. The lower end of the concentrated acid tank (V110) is connected to the mixing storage tank (V201) via pipeline. A stirring motor (M) is provided on the top of the acidification vessel (R5301), and the output end of the stirring motor (M) is connected to the stirrer (R1).

[0005] Preferably, the inner cavity of the acidification vessel (R5301) is provided with an acid sprayer (R3), and the acid sprayer (R3) is connected to the concentrated acid tank (V110) through a pipeline, a first control valve (a1) and an acid control valve (a3).

[0006] Preferably, a fresh water sprayer (R4) is provided on one side of the acid sprayer (R3) in the inner cavity of the acidification vessel (R5301). The fresh water sprayer (R4) is connected to the fresh water tank (V111) through a pipeline, a second control valve (a2) and a fresh water control valve (a4).

[0007] Preferably, the aforementioned circulating cooling water storage tank (CWS) is connected to the lower inlet of the cooling jacket (R2) via pipelines, a temperature gauge (TIC), and a cooling water inlet control valve (a6).

[0008] Preferably, the aforementioned return water storage tank (CWR) is connected to the upper outlet of the cooling jacket (R2) via pipelines, a pressure gauge (PG), and a return water control valve (a5).

[0009] Preferably, the bottom of the acidification vessel (R5301) is connected to the mixing tank (V201) via a pipeline and a mixing liquid discharge valve (a7).

[0010] Preferably, an inlet control valve (a8) is provided on the pipeline between the first transfer pump (P101) and the acidification vessel (R5301).

[0011] The beneficial effects of this invention are as follows: This invention solves the problem of long acidification time of diethyl phenylmalonate in the prior art, which affects the synthesis efficiency; In this invention, two materials are simultaneously sprayed into the acidification kettle, and cooling water is circulated in the cooling jacket for heat absorption, so that the acid solution after preparation is rapidly reduced. This method can greatly reduce the acidification time, reduce the heat release during preparation, reduce the requirements for refrigerant, and also avoid the problem that excessively high temperature during acidification will cause material decomposition and generate other impurities, affecting the purity of the product. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] In the diagram above: concentrated acid tank V110, fresh water tank V111, acidification kettle R5301, diethyl phenylmalonate storage tank V101, return water storage tank CWR, circulating cooling water storage tank CWS, first transfer pump P101, pressure gauge PG, temperature gauge TIC, mixing tank V201.

[0014] First control valve a1, second control valve a2, acid control valve a3, fresh water control valve a4, return water control valve a5, cooling water inlet control valve a6, mixed liquid discharge valve a7, stirring motor M, stirrer R1, cooling jacket R2, acid sprayer R3, fresh water sprayer R4. Detailed Implementation

[0015] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0016] Example 1, referring to Figure 1 This utility model discloses an apparatus for improving the acidification efficiency of diethyl phenylmalonate, comprising a concentrated acid tank V110, a fresh water tank V111, an acidification kettle R5301, a diethyl phenylmalonate storage tank V101, a return water storage tank CWR, a circulating cooling water storage tank CWS, a first transfer pump P101, and a mixing tank V201. The upper end of the acidification kettle R5301 is connected to the concentrated acid tank V110 via a pipeline on one side and to the fresh water tank V111 via a pipeline on the other side. In the upper end of the acidification kettle R5301... The unit is connected to the diethyl phenylmalonate storage tank V101 via pipelines and the first delivery pump P101. A cooling jacket R2 is provided on the outer wall of the acidification reactor R5301. A circulating cooling water storage tank CWS is connected to the lower side of the cooling jacket R2 via pipelines, and a return water storage tank CWR is connected to the upper side of the cooling jacket R2 via pipelines. The lower end of the concentrated acid tank V110 is connected to the mixing storage tank V201 via pipelines. A stirring motor M is provided on the top of the acidification reactor R5301, and the output end of the stirring motor M is connected to the stirrer R1.

[0017] The acidification reactor R5301 is equipped with an acid sprayer R3 in its inner cavity, and the acid sprayer R3 is connected to the concentrated acid tank V110 through pipelines, a first control valve a1 and an acid control valve a3.

[0018] The acid sprayer R3 inside the acidification vessel R5301 is provided with a fresh water sprayer R4 on one side. The fresh water sprayer R4 is connected to the fresh water tank V111 through pipelines, the second control valve a2 and the fresh water control valve a4.

[0019] The aforementioned circulating cooling water storage tank CWS is connected to the lower inlet of the cooling jacket R2 via pipelines, a temperature gauge TIC, and a cooling water inlet control valve a6.

[0020] The aforementioned return water storage tank CWR is connected to the upper outlet of the cooling jacket R2 via pipelines, pressure gauge PG, and return water control valve a5.

[0021] The bottom of the aforementioned acidification reactor R5301 is connected to the mixing tank V201 via a pipeline and a mixing liquid discharge valve a7.

[0022] The pipeline between the first transfer pump P101 and the acidification reactor R5301 is equipped with an inlet control valve a8.

[0023] In use, this invention involves pre-filling the acidification reactor R5301 with fresh water up to the minimum level of the agitator R1. The acid solution is fed through the acid sprayer R3 of the acidification reactor R5301, and the fresh water is fed through the fresh water sprayer R4. The mixture is then uniformly mixed by the agitator R1. Cooling water is circulated through the cooling jacket R2 of the acidification reactor R5301 to absorb heat, rapidly cooling the prepared acid solution. Then, the outlet of the diethyl phenylmalonate storage tank V101 is opened. Crude diethyl phenylmalonate is fed into the acidification reactor R5301 via pipeline and the first transfer pump P101, enabling direct acidification of the crude product without cooling. This avoids the problem of excessively high temperatures during the acidification process in the original technology, which could cause the diethyl phenylmalonate to decompose and produce other impurities, affecting the purity of the diethyl phenylmalonate product and reducing the requirements for refrigerant. The acidified mixture is then sent to the mixing storage tank V201 by opening the mixed liquid discharge valve a7.

[0024] Example 2: An apparatus for improving the acidification efficiency of diethyl phenylmalonate mentioned in this utility model includes a concentrated acid tank V110, a fresh water tank V111, an acidification kettle R5301, a diethyl phenylmalonate storage tank V101, a return water storage tank CWR, a circulating cooling water storage tank CWS, a first transfer pump P101, and a mixing tank V201. One side of the upper end of the acidification kettle R5301 is connected to the concentrated acid tank V110 via a pipeline, and the other side is connected to the fresh water tank V111 via a pipeline. The upper part of the acidification kettle R5301... The middle part of the vessel is connected to the diethyl phenylmalonate storage tank V101 via a pipeline and the first delivery pump P101. A cooling jacket R2 is provided on the outer wall of the acidification vessel R5301. A circulating cooling water storage tank CWS is connected to the lower side of the cooling jacket R2 via a pipeline, and a return water storage tank CWR is connected to the upper side of the cooling jacket R2 via a pipeline. The lower end of the concentrated acid tank V110 is connected to the mixing storage tank V201 via a pipeline. A stirring motor M is provided on the top of the acidification vessel R5301, and the output end of the stirring motor M is connected to the stirrer R1.

[0025] The difference from Example 1 is:

[0026] The circulating cooling water storage tank CWS and the return water storage tank CWR mentioned in this embodiment are both insulated on their outer walls, which reduces the decrease in water temperature inside the circulating cooling water storage tank CWS and the return water storage tank CWR, making the device more energy-efficient.

[0027] The above description is merely a preferred embodiment of this utility model. Any person skilled in the art may modify this utility model or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent transformations made based on the technical solutions of this utility model are within the scope of protection claimed by this utility model.

Claims

1. An apparatus for improving the acidification efficiency of diethyl phenylmalonate, characterized in that: The system includes a concentrated acid tank (V110), a fresh water tank (V111), an acidification reactor (R5301), a diethyl phenylmalonate storage tank (V101), a return water storage tank (CWR), a circulating cooling water storage tank (CWS), a first transfer pump (P101), and a mixing tank (V201). The acidification reactor (R5301) is connected to the concentrated acid tank (V110) via a pipeline on one side and to the fresh water tank (V111) via a pipeline on the other side. The first transfer pump (P101) is connected to the acidification reactor (R5301) via a pipeline at the middle of its upper end. The acidification vessel (R5301) is connected to a diethyl phenyl malonate storage tank (V101). A cooling jacket (R2) is provided on the outer wall of the acidification vessel (R5301). A circulating cooling water storage tank (CWS) is connected to the lower side of the cooling jacket (R2) through a pipeline, and a return water storage tank (CWR) is connected to the upper side of the cooling jacket (R2) through a pipeline. The lower end of the concentrated acid tank (V110) is connected to a mixing storage tank (V201) through a pipeline. A stirring motor (M) is provided on the top of the acidification vessel (R5301), and the output end of the stirring motor (M) is connected to a stirrer (R1).

2. The apparatus for improving the acidification efficiency of diethyl phenylmalonate according to claim 1, characterized in that: The acidification vessel (R5301) is equipped with an acid sprayer (R3) in its inner cavity, and the acid sprayer (R3) is connected to the concentrated acid tank (V110) through pipelines, a first control valve (a1) and an acid control valve (a3).

3. The apparatus for improving the acidification efficiency of diethyl phenylmalonate according to claim 2, characterized in that: The acidification reactor (R5301) has a fresh water sprayer (R4) on one side of the acid sprayer (R3) in the inner cavity. The fresh water sprayer (R4) is connected to the fresh water tank (V111) through pipelines, a second control valve (a2) and a fresh water control valve (a4).

4. The apparatus for improving the acidification efficiency of diethyl phenylmalonate according to claim 3, characterized in that: The circulating cooling water storage tank (CWS) is connected to the lower inlet of the cooling jacket (R2) via pipelines, a thermometer (TIC), and a cooling water inlet control valve (a6).

5. The apparatus for improving the acidification efficiency of diethyl phenylmalonate according to claim 4, characterized in that: The return water storage tank (CWR) is connected to the upper outlet of the cooling jacket (R2) via pipelines, pressure gauges (PG) and return water control valves (a5).

6. The apparatus for improving the acidification efficiency of diethyl phenylmalonate according to claim 5, characterized in that: The bottom of the acidification reactor (R5301) is connected to the mixing tank (V201) via a pipeline and a mixing liquid discharge valve (a7).

7. The apparatus for improving the acidification efficiency of diethyl phenylmalonate according to claim 6, characterized in that: The pipeline between the first delivery pump (P101) and the acidification reactor (R5301) is equipped with an inlet control valve (a8).

Images