CN210595863U - Production device of N, N-dicarboxymethylamino acid salt - Google Patents
Production device of N, N-dicarboxymethylamino acid salt Download PDFInfo
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- CN210595863U CN210595863U CN201921530797.0U CN201921530797U CN210595863U CN 210595863 U CN210595863 U CN 210595863U CN 201921530797 U CN201921530797 U CN 201921530797U CN 210595863 U CN210595863 U CN 210595863U
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Abstract
The utility model discloses utilize static mixer continuous mixing reaction material, the material that will mix again lets in the continuous reactor in the reaction, through control material velocity of flow, conditions such as temperature, obtain the aqueous solution that is rich in N, N-dicarboxy methyl amino acid salt from the continuous reactor export, through concentrating, crystallization, centrifugation, washing, drying process again, separate N, N-dicarboxy methyl amino acid salt, by-product industrial salt, outer steam and washing brine can be used as the dissolving water of raw materials amino acid salt and chloroacetic acid. This utility model equipment structure is simple, and easily operation is easily reformed transform, and through continuous feeding, the very big improve equipment utilization rate of the mode of the continuous ejection of compact practices thrift the cost, and whole process does not have the three wastes and produces, green.
Description
Technical Field
The utility model relates to the technical field of chemical equipment, in particular to a production device of N, N-dicarboxymethyl amino acid salt.
Background
Chelating additives such as Ethylene Diamine Tetraacetic Acid (EDTA), nitrilotriacetic acid (NTA), Sodium Tripolyphosphate (STPP) and the like are commonly used in the traditional industrial and household detergents. Although EDTA has the characteristics of strong complexing ability and good alkali resistance, the EDTA has weak dispersing ability and is not easily biodegraded; NTA is a suspected carcinogen, and its use was regulated as early as years ago in the united states and the european union; in recent years, the eutrophication problem of water bodies in rivers and lakes is becoming more serious, and the use of the phosphorus-containing additive STPP tends to be strictly prohibited. Environmental change and global warming again make the focus of environmental protection and green become the issue of mass life, and green products and low carbon emission are also regarded and form a trend in the industry.
Some N, N-dicarboxymethylamino acid salts are more and more attracted attention because of the characteristics of easy biodegradation, conformity with OECD biological biodegradability test requirements, environmental friendliness, safe use and the like. The N, N-dicarboxymethylamino acid salts are collectively called as green chelating agents, have metal chelating capacity equivalent to that of EDTA, can form stable water-soluble complex with metal ions, can be well dissolved in a wide pH value range, have strong decontamination capacity, can generate good synergistic effect with a bactericide in a system, can replace traditional chelating agents such as NTA, EDTA and the like by virtue of green biodegradable physical properties and sustainable application function, and can be widely applied to the fields of daily chemical industry, pharmaceutical industry, agriculture, washing product industry, industrial descaling and the like. At present, a great deal of reports are made on domestic and foreign documents about the production method of the green chelating agent N, N-dicarboxymethylamino acid salt. In the prior method at home, amino acid such as L-glutamic acid, L-aspartic acid and the like and 2-chloroacetic acid or 2-chloroacetonitrile are generally used for synthesizing a target product in an alkaline system. The product prepared by the method has high yield, but the production period is long, the resource utilization rate is low, and the method is not beneficial to the industrial scale development.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides a continuous, environment-friendly and pollution-free production device for the N, N-dicarboxymethylamino acid salt as the green chelating agent.
The technical scheme of the invention is as follows:
a production device of N, N-dicarboxymethylamino acid salt is characterized by comprising a first-stage static mixer, a second-stage static mixer and a continuous reactor which are sequentially connected, wherein the discharge end of the continuous reactor is connected with an outer steaming kettle, the upper end of the outer steaming kettle is provided with an outer steaming kettle feed inlet and an outer steaming kettle steam outlet, the lower end of the outer steaming kettle is provided with an outer steaming kettle discharge outlet, the outer steaming kettle feed inlet is connected with the continuous reactor, the outer steaming kettle steam outlet is connected with an outer steaming kettle collecting tank, the outer steaming kettle discharge outlet is connected with a solid-liquid separating device, the solid-liquid separating device is provided with a solid-liquid separating device feed inlet and a solid-liquid separating device water inlet at the upper end, one side of the solid-liquid separating device feed inlet and the solid-liquid separating device water inlet are arranged at the bottom of the outer steaming kettle collecting tank, the outer steaming kettle steam outlet is connected with the outer steam inlet through a pipeline, the outer steaming kettle discharge port is connected with the feed inlet of the solid-liquid separation device through a pipeline, the water outlet of the outer steaming liquid collection tank is connected with the solid raw material dissolving water tank through a pipeline, the water inlet of the solid-liquid separation device is connected with the water outlet of the outer steaming liquid collection tank through a pipeline, and the liquid outlet is respectively connected with the product dilution tank and the washing liquid inlet of the outer steaming liquid collection tank through pipelines.
Further, the first-stage static mixer is provided with a first inlet and a first outlet, the first inlet of the first-stage static mixer is connected with the amino acid saline water tank and the liquid caustic soda tank through pipelines respectively, the second-stage static mixer is provided with a second inlet and a second outlet, the second inlet of the second-stage static mixer is connected with the first outlet of the first-stage static mixer and the chloroacetic acid water tank through pipelines respectively, the continuous reactor is provided with a reactor feed inlet, a reactor discharge outlet, a circulating water inlet and a circulating water outlet, the outer wall of the continuous reactor is provided with a jacket, the reactor feed inlet of the continuous reactor is connected with the second outlet of the second-stage static mixer through pipelines, and the circulating water inlet and the circulating water outlet are connected with a circulating water inlet pipe and a water return pipe through pipelines respectively.
Further, the continuous reactor can be a vertical tube reactor, a coil tube reactor, a U-shaped tube reactor or a multi-stage reaction kettle connected in series end to end.
Further, the solid-liquid separation device may be a centrifuge or a filter press.
Furthermore, a first inlet of the first-stage static mixer is connected with the amino acid brine solution tank and the liquid caustic soda tank through a three-way series valve, a material pumping pump and an electronic flowmeter respectively, and a second inlet of the second-stage static mixer is connected with a first outlet and the chloroacetic acid brine tank through a three-way series valve, a material pumping pump and an electronic flowmeter respectively.
Furthermore, the liquid outlet is connected with the product dilution tank and the washing liquid inlet of the outer steam liquid collection tank through a three-way series valve and a transmission pump.
Furthermore, the outer steaming kettle can be provided with one group or a plurality of groups which are mutually connected in parallel.
The utility model discloses beneficial effect does:
the utility model discloses utilize static mixer continuous mixing reaction material, the material that will mix again lets in the continuous reactor in the reaction, through control material velocity of flow, conditions such as temperature, obtain the aqueous solution that is rich in N, N-dicarboxy methyl amino acid salt from the continuous reactor export, through concentrating, crystallization, centrifugation, washing, drying process again, separate N, N-dicarboxy methyl amino acid salt, by-product industrial salt, outer steam and washing brine can be used as the dissolving water of raw materials amino acid salt and chloroacetic acid. This utility model equipment structure is simple, and easily operation is easily reformed transform, and through continuous feeding, the very big improve equipment utilization rate of the mode of the continuous ejection of compact practices thrift the cost, and whole process does not have the three wastes and produces, green.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
Wherein: the device comprises a primary static mixer 1, a secondary static mixer 2, a continuous reactor 3, an outer steaming kettle 4, a solid-liquid separation device 5, an outer steaming liquid collecting tank 6, a first inlet 101, a first outlet 102, a second inlet 201, a second outlet 202, a reactor feed inlet 301, a reactor discharge outlet 302, a circulating water inlet 303, a circulating water outlet 304, an outer steaming kettle feed inlet 401, an outer steaming kettle steam outlet 402, an outer steaming kettle discharge outlet 403, a solid-liquid separation device feed inlet 501, a solid-liquid separation device water inlet 502, a solid outlet 503, a liquid outlet 504, an outer steam inlet 601, a washing liquid inlet 602 and an outer steaming liquid collecting tank water outlet 603.
Detailed Description
The present application is further described with reference to the following description and detailed description of the preferred embodiments.
The device for producing the N, N-dicarboxymethylamino acid salt is characterized by comprising a first-stage static mixer 1, a second-stage static mixer 2 and a continuous reactor 3 which are sequentially connected, wherein the discharge end of the continuous reactor 3 is connected with an outer steaming kettle 4, the upper end of the outer steaming kettle 4 is provided with an outer steaming kettle feed inlet 401 and an outer steaming kettle steam outlet 402, the lower end of the outer steaming kettle 4 is provided with an outer steaming kettle discharge outlet 403, the outer steaming kettle feed inlet 401 is connected with the continuous reactor 3, the outer steaming kettle steam outlet 402 is connected with an outer steaming kettle collecting tank 6, the outer steaming kettle discharge outlet 403 is connected with a solid-liquid separating device 5, the solid-liquid separating device is provided with a solid-liquid separating device feed inlet 501 and a solid-liquid separating device water inlet 502 at the upper end, a solid outlet 503 is arranged at one side, a liquid outlet 504 is arranged at the bottom of the outer steaming kettle collecting tank 6, an outer steam inlet 601 and a water washing liquid inlet 602 are arranged, outer steam kettle steam outlet 402 passes through the pipe connection with outer steam inlet 601, outer steam kettle discharge gate 403 passes through the pipe connection with solid-liquid separation equipment feed inlet 501, outer steam collection tank delivery port 603 passes through the pipeline and dissolves the water pitcher with solid starting material and is connected, solid-liquid separation equipment water inlet 502 passes through the pipe connection with outer steam collection tank delivery port 603, liquid outlet 504 passes through the pipe connection with product dilution tank and outer steam collection tank washing liquid import 602 respectively.
Further, the first-stage static mixer is provided with a first inlet 101 and a first outlet 102, the first inlet 101 of the first-stage static mixer is respectively connected with the amino acid saline water tank and the liquid caustic soda tank through pipelines, the second-stage static mixer is provided with a second inlet 201 and a second outlet 202, the second inlet 201 of the second-stage static mixer is respectively connected with the first outlet 102 of the first-stage static mixer and the chloroacetic acid water tank through pipelines, the continuous reactor is provided with a reactor feed inlet 301, a reactor discharge outlet 302, a circulating water inlet 303 and a circulating water outlet 304, the outer wall of the continuous reactor is provided with a jacket, the reactor feed inlet 301 of the continuous reactor is connected with the second outlet 202 of the second-stage static mixer through pipelines, and the circulating water inlet 303 and the circulating water outlet 304 are respectively connected with a circulating water inlet pipe and a water return pipe through pipelines.
Further, the continuous reactor 3 may be a vertical tubular reactor, a coil tubular reactor, a U-shaped tubular reactor, or a multi-stage reactor connected in series end to end.
Further, the solid-liquid separation device 5 may be a centrifuge or a filter press.
Furthermore, a first inlet 101 of the first-stage static mixer is connected with the amino acid aqueous solution tank and the liquid caustic soda tank through a three-way series valve, a material pumping pump and an electronic flowmeter respectively, and a second inlet 201 of the second-stage static mixer is connected with a first outlet 2 and the chloroacetic acid aqueous solution tank through a three-way series valve, a material pumping pump and an electronic flowmeter.
Further, the liquid outlet 504 is connected with the product dilution tank and the outer steam collecting tank through a three-way series valve and a transmission pump on the pipeline connected with the water washing liquid inlet 602 of the product dilution tank and the outer steam collecting tank respectively.
Further, the outer steaming kettle 4 can be provided with one group or a plurality of groups connected in parallel.
The operation of the amino acid salt is illustrated by taking sodium alanine as an example, and combining the connection relation and the attached figure 1:
the method comprises the following steps of respectively pumping 50% by mass of sodium alanine brine solution and 40% by mass of sodium hydroxide aqueous solution into a first-stage static mixer 1 at a constant speed according to flow rates of 125kg/h and 118kg/h, wherein the molar ratio of sodium alanine to sodium hydroxide is n-sodium alanine: n sodium hydroxide = 1: 2.1 to 2.3; the materials enter a secondary static mixer 2 through a primary static mixer 1 at a constant speed, and meanwhile, chloroacetic acid aqueous solution with the mass percentage of 48 percent is added into the chloroacetic acid aqueous solution at a constant speed at the flow rate of 231kg/h, wherein: alanine and chloroacetic acid in a molar ratio n alanine: n-chloroacetic acid = 1: 2.05-2.15; the method comprises the steps of enabling materials to enter a coil type continuous reactor 3 from a secondary static mixer 2 at a constant speed of 605kg/h for reaction, controlling the temperature in the continuous reactor 3 to be 70-110 ℃, enabling the materials to enter the continuous reactor 3 from the beginning till the materials all enter an outer steaming kettle 4 within one period for 3 hours and 58 minutes, enabling the reaction materials to continuously enter the outer steaming kettle 4 with stirring from the continuous reactor 3, maintaining the temperature of the materials in the outer steaming kettle 4 at 80-100 ℃, concentrating the materials through outer steaming under a certain negative pressure condition, and filtering the concentrated materials through a solid-liquid separation device 5 to obtain outer steaming liquid, filtrate and filter cakes respectively. And (3) putting the external steaming liquid into an external steaming liquid collecting tank 6 for dissolving the washing sodium chloride and the solid materials, diluting the filtrate to obtain N, N-dicarboxymethylalanine trisodium MGDA aqueous solution with different mass percentage contents, and washing the filter cake by the external steaming liquid to obtain the industrial-grade sodium chloride. 2269.08kg of MGDA aqueous solution with the mass fraction of 38.14 percent is obtained in one reaction period, the yield is 92.84 percent in terms of alanine, the content of chloride ions is 1.49 percent, 377.3kg of byproduct sodium chloride is obtained, and the purity is 96.07 percent.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. A production device of N, N-dicarboxymethylamino acid salt is characterized by comprising a first-stage static mixer, a second-stage static mixer and a continuous reactor which are sequentially connected, wherein the discharge end of the continuous reactor is connected with an outer steaming kettle, the upper end of the outer steaming kettle is provided with an outer steaming kettle feed inlet and an outer steaming kettle steam outlet, the lower end of the outer steaming kettle is provided with an outer steaming kettle discharge outlet, the outer steaming kettle feed inlet is connected with the continuous reactor, the outer steaming kettle steam outlet is connected with an outer steaming kettle collecting tank, the outer steaming kettle discharge outlet is connected with a solid-liquid separating device, the solid-liquid separating device is provided with a solid-liquid separating device feed inlet and a solid-liquid separating device water inlet at the upper end, one side of the solid-liquid separating device feed inlet and the solid-liquid separating device water inlet are arranged at the bottom of the outer steaming kettle collecting tank, the outer steaming kettle steam outlet is connected with the outer steam inlet through a pipeline, the outer steaming kettle discharge port is connected with the feed inlet of the solid-liquid separation device through a pipeline, the water outlet of the outer steaming liquid collection tank is connected with the solid raw material dissolving water tank through a pipeline, the water inlet of the solid-liquid separation device is connected with the water outlet of the outer steaming liquid collection tank through a pipeline, and the liquid outlet is respectively connected with the product dilution tank and the washing liquid inlet of the outer steaming liquid collection tank through pipelines.
2. An apparatus for producing N, N-dicarboxymethylamino acid salt according to claim 1, it is characterized in that the first-stage static mixer is provided with a first inlet and a first outlet, the first inlet of the first-stage static mixer is respectively connected with the amino acid saline solution tank and the liquid caustic soda tank through pipelines, the second inlet of the second-stage static mixer is respectively connected with the first outlet of the first-stage static mixer and the chloroacetic acid water solution tank through pipelines, the continuous reactor is provided with a reactor feeding hole, a reactor discharging hole, a circulating water inlet and a circulating water outlet, the outer wall of the continuous reactor is provided with a jacket, the feed inlet of the continuous reactor is connected with the second outlet of the secondary static mixer through a pipeline, and the circulating water inlet and the circulating water outlet are respectively connected with a circulating water inlet pipe and a water return pipe through pipelines.
3. The apparatus for producing N, N-dicarboxymethylamino acid salt as claimed in claim 1, wherein said continuous reactor is a vertical tubular reactor, a coil tubular reactor, a U-shaped tubular reactor or a multi-stage reaction vessel connected in series end to end.
4. The apparatus for producing N, N-dicarboxymethylamino acid salt as claimed in claim 1, wherein said solid-liquid separation apparatus is a centrifuge or a filter press.
5. The apparatus for producing N, N-dicarboxymethylamino acid salt as claimed in claim 1, wherein the pipeline connecting the first inlet of the first static mixer with the amino acid aqueous solution tank and the caustic soda liquid tank is connected with a three-way valve, a material-pumping pump and an electronic flowmeter, and the pipeline connecting the second inlet of the second static mixer with the first outlet and the chloroacetic acid aqueous solution tank is connected with a three-way valve, a material-pumping pump and an electronic flowmeter.
6. The apparatus for producing N, N-dicarboxymethylamino acid salt as claimed in claim 1, wherein the pipeline connecting the liquid outlet to the product dilution tank and the washing liquid inlet of the outer steam collecting tank is connected with a valve and a transfer pump in series via a three-way valve.
7. The apparatus for producing N, N-dicarboxymethylamino acid salt as claimed in claim 1, wherein said external steaming vessel is provided in one set or in plural sets connected in parallel with each other.
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| CN201921530797.0U CN210595863U (en) | 2019-09-16 | 2019-09-16 | Production device of N, N-dicarboxymethylamino acid salt |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110841585A (en) * | 2019-10-14 | 2020-02-28 | 吴剑华 | Benzyl cyanide production device and use method thereof |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110841585A (en) * | 2019-10-14 | 2020-02-28 | 吴剑华 | Benzyl cyanide production device and use method thereof |
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Address after: No.1, Shiliquan East Road, Shizhong District, Zaozhuang City, Shandong Province 277100 Patentee after: Shandong Taihe Technology Co.,Ltd. Address before: 277000 No.1, Shiliquan East Road, Shizhong District, Zaozhuang City, Shandong Province Patentee before: SHANDONG TAIHE WATER TREATMENT TECHNOLOGIES Co.,Ltd. |
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