CN219092054U - Methyl 2-chloropropionate esterification wastewater methanol recycling system - Google Patents
Methyl 2-chloropropionate esterification wastewater methanol recycling system Download PDFInfo
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- CN219092054U CN219092054U CN202223575149.1U CN202223575149U CN219092054U CN 219092054 U CN219092054 U CN 219092054U CN 202223575149 U CN202223575149 U CN 202223575149U CN 219092054 U CN219092054 U CN 219092054U
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Abstract
The utility model discloses a methyl 2-chloropropionate esterification wastewater methanol recycling system which comprises a methanol metering tank and a 2-chloropropionic acid metering tank, wherein the discharge ports of the methanol metering tank and the 2-chloropropionic acid metering tank are connected with the feed inlet of a mixing kettle, the discharge port of the mixing kettle is connected with the feed inlet of a mixing liquid drop metering tank, the discharge port of the mixing liquid drop metering tank is connected with the feed inlet of an esterification reaction kettle, the discharge port of a resin column is connected with the feed inlet of a distillation kettle, the discharge port of the distillation kettle is connected with the feed inlet of a hypergravity bed, the discharge port of the hypergravity bed is connected with the feed inlet of a dry methanol receiving tank, and the discharge port of the dry methanol receiving tank is connected with the feed inlet of the methanol metering tank. Purifying the methanol in the esterification wastewater through the distillation kettle and the hypergravity bed to obtain anhydrous methanol, and returning the anhydrous methanol to the methanol metering tank as a raw material for production, so that the treatment of the esterification wastewater is realized, the dosage of the anhydrous methanol used in production is reduced, the dosage of the anhydrous methanol is reduced, and the production cost is reduced.
Description
Technical field:
the utility model relates to the field of production of methyl 2-chloropropionate, in particular to a methyl 2-chloropropionate esterification wastewater methanol recycling system.
The background technology is as follows:
in the production of methyl 2-chloropropionate, chlorine and propionic acid are required to be sent to a chlorination kettle for reaction to generate 2-chloropropionic acid, then 2-chloropropionic acid and methanol are sent to an esterification reaction kettle for esterification to generate methyl 2-chloropropionate, mixed liquid discharged from the esterification reaction kettle is required to be sent to an alkaline washing kettle for alkaline washing, an oil layer in the mixed liquid is separated to obtain ethyl 2-chloropropionate with higher purity, and a water phase is used as production wastewater for discharging, so that the COD (chemical oxygen demand) of the part of wastewater is high, the wastewater treatment cost is high, a large amount of production raw material methanol is contained, a higher rectifying tower is required to be configured for purifying the methanol, the number of matched equipment of the rectifying tower is relatively high, and the engineering cost is high, so that a large amount of methanol is wasted as the wastewater is discharged.
The utility model comprises the following steps:
the utility model aims to provide a methyl 2-chloropropionate esterification wastewater methanol recycling system.
The utility model is implemented by the following technical scheme:
the utility model provides a methyl 2-chloropropionate esterification wastewater methanol recycle system, includes methyl alcohol metering tank and 2-chloropropionic acid metering tank, the feed inlet and the methyl alcohol storage tank of methyl alcohol metering tank are connected, the feed inlet and the feed inlet of chloridizing kettle of 2-chloropropionic acid metering tank are connected, the feed outlet and the feed inlet of mixing kettle of methyl alcohol metering tank and 2-chloropropionic acid metering tank are connected, the feed outlet and the feed inlet of mixing kettle of liquid drop adding metering tank are connected, the feed outlet and the feed inlet of esterification reaction kettle are connected, the feed outlet and the air inlet of esterification condenser are connected, the feed outlet and the feed inlet of oil-water separation tank are connected, the oil phase outlet and the feed inlet of oil phase storage tank are connected, the water phase outlet and the feed inlet of water phase storage tank are connected, the feed outlet and the feed inlet of mixing kettle are connected, the feed inlet and the feed inlet of mixing kettle and the liquid drop adding metering tank are connected, the feed inlet and the feed inlet of crude distillation kettle are connected, the feed inlet and the condensate tank are connected, the condensate tank is connected with the feed inlet of the methanol receiver of the condensate tank, the condensate tank is connected with the feed inlet.
Preferably, the liquid outlet of the rough steam condenser is connected with the feed inlet of the rough steam methanol receiving tank, and the discharge outlet of the rough steam methanol receiving tank is connected with the feed inlet of the hypergravity bed.
Preferably, the discharge port of the anhydrous methanol receiving tank is connected with the feed port of the anhydrous methanol delivery pump, and the discharge port of the anhydrous methanol delivery pump is connected with the feed port of the methanol metering tank.
The utility model has the advantages that: purifying the methanol in the esterification wastewater through the distillation kettle and the hypergravity bed to obtain anhydrous methanol, and returning the anhydrous methanol to the methanol metering tank as a raw material for production, so that the treatment of the esterification wastewater is realized, the dosage of the anhydrous methanol used in production is reduced, the dosage of the anhydrous methanol is reduced, and the production cost is reduced.
Description of the drawings:
fig. 1 is a schematic structural view of the present utility model.
In the figure: the device comprises a methanol metering tank 1, a 2-chloropropionic acid metering tank 2, a mixing kettle 3, a mixed liquid dropwise adding metering tank 4, an esterification reaction kettle 5, an esterification condenser 6, an oil-water separation tank 7, an oil phase storage tank 8, an aqueous phase storage tank 9, a resin column 10, a distillation kettle 11, a rough distillation condenser 12, a hypergravity bed 13, an anhydrous methanol condenser 14, an anhydrous methanol receiving tank 15, a rough distillation methanol receiving tank 16 and an anhydrous methanol conveying pump 17.
The specific embodiment is as follows:
as shown in fig. 1, the system for recycling methyl 2-chloropropionate esterification wastewater methanol comprises a methanol metering tank 1 and a 2-chloropropionic acid metering tank 2, wherein the feed inlet of the methanol metering tank 1 is connected with a methanol storage tank, the feed inlet of the 2-chloropropionic acid metering tank 2 is connected with the feed inlet of a chlorination kettle, the feed outlets of the methanol metering tank 1 and 2-chloropropionic acid metering tank 2 are connected with the feed inlet of a mixing kettle 3, the feed outlet of the mixing kettle 3 is connected with the feed inlet of a mixing liquid drop metering tank 4, the feed outlet of the mixing liquid drop metering tank 4 is connected with the feed inlet of an esterification reaction kettle 5, the feed outlet of the esterification reaction kettle 5 is connected with an air inlet of an esterification condenser 6, the feed outlet of the esterification condenser 6 is connected with the feed inlet of an oil-water separation tank 7, the oil phase outlet of the oil-water separation tank 7 is connected with the feed inlet of an oil phase storage tank 8, the water outlet of the oil-water separation tank 7 is connected with the feed inlet of an aqueous phase storage tank 9, the feed outlet of the aqueous phase 9 is connected with the feed inlet of a resin column 10, the feed outlet of the resin column 10 is connected with the feed inlet of the distillation kettle 11, the feed outlet of the distillation kettle 11 is connected with the feed inlet of the water inlet 12 of the water-storage tank 12, the raw material inlet of the water tank 13 is connected with the feed inlet of the water-storage tank 13, and the condensate bed 13 is connected with the feed inlet of the methanol receiver 13 of the condensate tank is connected with the condensate tank;
methanol in a methanol storage tank is fed into a mixing kettle 3 after being metered by a methanol metering tank 1, 2-chloropropionic acid in a chlorination kettle is fed into the mixing kettle 3 after being metered by a 2-chloropropionic acid metering tank 2, methanol and 2-chloropropionic acid are fully mixed in the mixing kettle 3, catalyst is added, mixed liquid in the mixing kettle 3 is injected into a mixed liquid dropwise adding metering tank 4, the mixed liquid is quantitatively added into an esterification reaction kettle 5 by the mixed liquid dropwise adding metering tank 4, the esterification reaction kettle 5 is esterified to generate methyl 2-chloropropionate, the methyl 2-chloropropionate is condensed into liquid by an esterification condenser 6 and then is fed into an oil-water separation tank 7, the methyl 2-chloropropionate is in the lower layer of an oil phase in the oil-water separation tank 7, water, methanol and 2-chloropropionic acid are in the upper layer of an aqueous phase, the methyl 2-chloropropionate is discharged into an oil phase storage tank 8, the mixture of water, methanol and 2-chloropropionic acid is discharged into a water phase storage tank 9 for temporary storage, water phase substances are mixed in the oil phase at the moment due to the fact that the mixture is separated only by layering, the mixture of water, methanol, 2-chloropropionic acid and methyl 2-chloropropionate is sent into a resin column 10, the resin column 10 adsorbs the 2-chloropropionic acid and the methyl 2-chloropropionate, the mixture of water and methanol is discharged into a rectifying still for further purification, the methanol purified by the rectifying still is condensed by a rough distillation condenser 12 and then sent into a hypergravity bed 13 for further purification, anhydrous methanol steam is obtained, and the anhydrous methanol condensed by the anhydrous methanol condenser 14 is sent into an anhydrous methanol receiving tank 15 for temporary storage, and then sent back into a methanol metering tank 1 for re-production, so that recovery of the anhydrous methanol is realized;
because the production conditions and products of the methyl 2-chloropropionate and the ethyl 2-chloropropionate are similar, the system can be also used for recovering the ethanol in the production of the ethyl 2-chloropropionate.
The drain port of the rough steaming condenser 12 is connected with the feed port of the rough steaming methanol receiving tank 16, and the drain port of the rough steaming methanol receiving tank 16 is connected with the feed port of the hypergravity bed 13, and the rough steaming methanol receiving tank 16 is arranged for buffer temporary storage because the water content of the methanol purified by the distillation kettle 11 is higher to ensure stable feed of the hypergravity bed 13.
The discharge port of the anhydrous methanol receiving tank 15 is connected with the feed port of the anhydrous methanol delivery pump 17, the discharge port of the anhydrous methanol delivery pump 17 is connected with the feed port of the methanol metering tank 1, the recovered anhydrous methanol is the end of the production process, and sufficient pressure can be ensured to be mixed with the feed of the methanol storage tank through the anhydrous methanol delivery pump 17.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (3)
1. The utility model provides a methyl 2-chloropropionate esterification wastewater methanol recycle system, its characterized in that includes methyl alcohol metering tank and 2-chloropropionic acid metering tank, the feed inlet and the methyl alcohol storage tank of methyl alcohol metering tank, the feed inlet and the feed inlet of chloridizing kettle of 2-chloropropionic acid metering tank are connected, the feed outlet and the feed inlet of mixing kettle of methyl alcohol metering tank and 2-chloropropionic acid metering tank are connected, the feed outlet and the feed inlet of mixing kettle drop addition metering tank are connected, the feed outlet and the feed inlet of esterification reaction kettle are connected, the feed outlet and the air inlet of esterification condenser are connected, the feed outlet and the feed inlet of oil-water separation tank are connected, the oil phase outlet and the feed inlet of oil phase storage tank are connected, the feed outlet and the feed inlet of water phase storage tank are connected, the feed outlet and the feed inlet of resin column are connected, the feed outlet and the feed inlet of distillation kettle are connected, the feed outlet and the raw material bed of distillation kettle are connected, the feed inlet and the condensate bed are connected to the feed inlet, the condensate tank is connected to the feed inlet is connected to the condensate tank is connected to the feed inlet, the condensate tank is connected to the feed inlet.
2. The methyl 2-chloropropionate esterification wastewater methanol recycling system according to claim 1, wherein the liquid outlet of the rough steam condenser is connected with the feed inlet of the rough steam methanol receiving tank, and the liquid outlet of the rough steam methanol receiving tank is connected with the feed inlet of the hypergravity bed.
3. The methyl 2-chloropropionate esterification wastewater methanol recycling system according to claim 1 or 2, wherein the discharge port of the anhydrous methanol receiving tank is connected with the feed port of an anhydrous methanol delivery pump, and the discharge port of the anhydrous methanol delivery pump is connected with the feed port of the methanol metering tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223575149.1U CN219092054U (en) | 2022-12-29 | 2022-12-29 | Methyl 2-chloropropionate esterification wastewater methanol recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223575149.1U CN219092054U (en) | 2022-12-29 | 2022-12-29 | Methyl 2-chloropropionate esterification wastewater methanol recycling system |
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| CN219092054U true CN219092054U (en) | 2023-05-30 |
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| CN202223575149.1U Active CN219092054U (en) | 2022-12-29 | 2022-12-29 | Methyl 2-chloropropionate esterification wastewater methanol recycling system |
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| CN (1) | CN219092054U (en) |
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