Cococamidodimethyl tertiary amine production device

Abstract

The utility model relates to the technical field of chemical industry production devices, and discloses a cocamidopropyl dimethyl tertiary amine production device which comprises a reaction column, the reaction column comprises a fractionating column body, a mixing column body and a reaction column body which are sequentially communicated from top to bottom, and the mixing column body is provided with a plurality of reaction column bodies which are respectively used for introducing N, N-dimethyl-1, 3, 4-trimethyl-1, 3-pentanedione, the reaction main body is provided with a first inlet and a second inlet for 1, 3-propane diamine and fatty acid, and the reaction main body is filled with filler; one end of the thermal insulation pipe is connected with the lower end of the reaction column body, and the other end of the thermal insulation pipe is provided with a discharge valve; the flash evaporator is arranged on the thermal insulation pipe in a communicating manner, and the flash evaporator is used for removing residual propylene diamine after the reaction. According to the cocamidodimethyl tertiary amine production device provided by the utility model, the mixing reaction and fractionation of N, N-dimethyl-1, 3-propane diamine and fatty acid can be simultaneously carried out, the occupied space of the production device is saved, the production time is shortened, the production efficiency is improved, liquid material transportation among process steps is omitted, the continuity of the process is ensured, and the production cost is reduced. The liquid material is stable.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical production device technical field, especially a kind of cocoamide dimethyl tertiary amine production device. BACKGROUND

[0002] Betaine surfactant as the largest global market share of one kind of amphoteric surfactant, is widely used in personal care, household care, textile printing and dyeing, papermaking, oil exploitation and multiple industries, especially in personal care products, betaine surfactant as mild surfactant, can provide excellent softness and antistatic effect, is deeply loved by consumers. At present, the synthesis process of cocamidopropyl betaine is mainly divided into two steps: 1, fatty acid or corresponding oil and N, N-dimethyl-propylenediamine condensation reaction to obtain cocoamide dimethyl tertiary amine (PKO);2, PKO and sodium chloroacetate are obtained by quaternization reaction to obtain cocoamide propyl betaine. The PKO synthesized in the first step can be used as a nonionic emulsifier and sold on the market, or can be used as a raw material for subsequent organic synthesis reaction, and the quality of the raw material is crucial to the subsequent reaction.

[0003] In the prior art, patent CN102134202B discloses that after fatty acid or fatty acid ester and N, N-dimethylaminopropylamine are mixed and reacted, the product PKO is obtained by entering the fractionating column and vacuum flash evaporator, and N, N-dimethylaminopropylamine is removed. This process is carried out in stages, and a fractionating column device is required, which occupies a large space and requires a large investment in equipment. Furthermore, it is difficult to ensure the stability of the liquid material during pipeline transportation between each process step, which affects the quality of the final product. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a cocoamide dimethyl tertiary amine production device, which is characterized by a fractionating column body, a mixing column body and a reaction column body arranged in communication from top to bottom, so that N, N-dimethyl-1, 3-propanediamine, fatty acid mixing reaction and fractionation are carried out simultaneously, the land occupation of the production device is saved, the production time is shortened, the production efficiency is increased, and the liquid material transportation between each process step is avoided, the continuity of the process is ensured, and the stability of the liquid material is ensured.

[0005] To achieve the above-mentioned purpose, the utility model provides a cocoamide dimethyl tertiary amine production device, which comprises:

[0006] A reaction column, the reaction column comprises a fractionating column body, a mixing column body and a reaction column body in communication from top to bottom, the mixing column body has a first inlet and a second inlet for introducing N, N-dimethyl-1, 3-propanediamine and fatty acid respectively, and the reaction main body is filled with packing;

[0007] A heat preservation tube, one end of the heat preservation tube is connected with the lower end of the reaction column body, and the other end of the heat preservation tube is provided with a discharge valve;

[0008] A flash evaporator, which is arranged in communication with the heat preservation tube, and is used for removing residual propylene diamine after reaction.

[0009] Further, the coconut amide dimethyl tertiary amine production device further comprises a vaporization storage tank, the mixing column body comprises a first mixing section and a second mixing section, the first mixing section is arranged in communication between the fractionating column body and the reaction column body, the second mixing section is arranged in communication on the outer circumferential wall of the first mixing section and extends radially to the first mixing section, the first inlet is arranged on the end of the second mixing section away from the first mixing section, the second inlet is arranged on the outer circumferential wall of the second mixing section, and the vaporization storage tank is arranged in communication with the first inlet, and the vaporization storage tank is used for storing N,N-dimethyl-1,3-propanediamine.

[0010] Further, the first inlet is provided with a nozzle, and the nozzle faces the first mixing section.

[0011] Further, the second inlet is provided with a liquid guide sleeve, and the liquid flow direction of the liquid guide sleeve and the radial direction of the second mixing section form an included angle.

[0012] Further, the second mixing section is provided with a first flange close to the end of the first mixing section, the outer circumferential wall of the first mixing section is provided with a second flange, and the first flange and the second flange are connected through bolts.

[0013] Further, the first mixing section and the reaction column body are arranged in communication with a connecting section, the inner diameter of the connecting section is smaller than the inner diameter of the reaction column body, and the connecting section is smoothly connected with the reaction main body.

[0014] Further, the heat preservation tube is a serpentine tube, and the plane where the serpentine tube is located is parallel to the vertical direction.

[0015] Further, the flash evaporator is provided with a gas outlet, and the gas outlet is arranged in communication with the vaporization storage tank.

[0016] Further, the upper end of the fractionating column body is arranged in communication with a gas extraction device.

[0017] The utility model discloses an embodiment coconut oil amide dimethyl tertiary amine production device compares with prior art, its beneficial effect lies in: the reaction column includes the fractionating column body, the mixed column body and the reaction column body in turn from top to bottom intercommunication, make N, N - dimethyl - 1, 3 - propylene diamine with fatty acid after mixing immediately enter the reaction and fractionate stage, and reaction and fractionate simultaneously, N, N - dimethyl - 1, 3 - propylene diamine and fatty acid reaction generates byproduct water, in high temperature environment, water vapor and propylene diamine steam mix and go up, through fractionating column body fractionation, and the propylene diamine that separates out flows back to the reaction column body and continues to carry out the reaction, guarantee propylene diamine concentration, and the production process is greatly shortened, need not set up independent equipment or pause and wait respectively, improve overall production efficiency, through with the integration of fractionation, mixing and reaction function, reaction column adopts vertical arrangement structure, greatly saved the floor area, is suitable for the production environment of limited space. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure schematic diagram of coconut oil amide dimethyl tertiary amine production device of the utility model embodiment;

[0019] In the figure, 1, reaction column;11, fractionating column body;12, mixed column body;121, first mixing section;1211, first flange;122, second mixing section;1221, first inlet;1222, second inlet;12221, liquid guide sleeve;1223, second flange;13, reaction column body;131, filler;14, connecting section;

[0020] 2, heat preservation pipe;

[0021] 3, flash evaporator;31, gas material outlet;

[0022] 4, vaporization storage tank;

[0023] 5, air extraction device;

[0024] 6, discharge valve. DETAILED DESCRIPTION

[0025] The specific implementation of the utility model will be described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0026] In the description of the utility model, the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", "transverse", "longitudinal" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not used to limit the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. For ordinary skilled persons in the art, the specific meanings of these terms in the utility model can be understood according to the specific circumstances.

[0027] In the description of the utility model, the terms "provided with", "provided", "connected", "placed" should be broadly understood, for example, it can be fixedly connected, detachably connected, or integrally constructed, it can be mechanically connected, or electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication between two devices, elements or components. For ordinary skilled persons in the art, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.

[0028] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of "multiple" is two or more.

[0029] The technical scheme of the utility model will be further described below in combination with the embodiments and the drawings.

[0030] As Figure 1 shown, the utility model embodiment's one cocamide dimethyl tertiary amine production device, including:

[0031] The reaction column 1 includes a fractionating column body 11, a mixing column body 12 and a reaction column body 13 connected in sequence from top to bottom, the mixing column body 12 has a first inlet 1221 and a second inlet 1222 for introducing N,N-dimethyl-1,3-propanediamine and fatty acid respectively, and the reaction main body is filled with packing 131;

[0032] The heat preservation pipe 2 is connected with the lower end of the reaction column body 13 at one end, and is provided with a discharge valve 6 at the other end;

[0033] The flash evaporator 3 is connected and arranged on the heat preservation pipe 2, and is used for removing residual propanediamine after reaction.

[0034] Based on the above technical scheme, the propylene diamine and the fatty acid enter the mixing column body 12 through the first inlet 1221 and the second inlet 1222 respectively for mixing, and the mixed liquid in the mixing column body 12 flows into the reaction column body 13 for reaction. Due to the high-temperature environment of the reaction of the propylene diamine and the fatty acid, the reaction of the propylene diamine and the fatty acid generates byproduct water, the water vapor and the propylene diamine vapor are mixed and rise, and the rising position reaches the fractionating column body 11 for fractionation. The fractionated propylene diamine flows back to the reaction column body 13, the reacted product flows into the heat preservation pipe 2 for heat preservation and pressure preservation, finally, the liquid in the heat preservation pipe 2 is transported to the flash evaporator 3, the residual propylene diamine after reaction is removed, and the product can be discharged through the discharge valve 6.

[0035] The reaction column 1 includes the fractionating column body 11, the mixing column body 12 and the reaction column body 13 which are sequentially communicated from top to bottom, so that the N,N-dimethyl-1,3-propylene diamine and the fatty acid immediately enter the reaction and fractionation stages after mixing, the reaction and the fractionation are simultaneously performed, the N,N-dimethyl-1,3-propylene diamine and the fatty acid react to generate byproduct water, the water vapor and the propylene diamine vapor are mixed and rise in the high-temperature environment, and the rising position reaches the fractionating column body 11 for fractionation. The separated propylene diamine flows back to the reaction column body 13 to continue the reaction, the concentration of the propylene diamine is ensured, the production process is greatly shortened, and it is not necessary to separately set independent equipment or wait for stop, so that the overall production efficiency is improved. By integrating the functions of fractionation, mixing and reaction, the reaction column 1 adopts a vertical arrangement structure, the occupied area is greatly saved, and the production environment with limited space is suitable.

[0036] Preferably, the coconut amide dimethyl tertiary amine production device further includes a vaporization storage tank 4, the mixing column body 12 includes a first mixing section 121 and a second mixing section 122, the first mixing section 121 is communicated between the fractionating column body 11 and the reaction column body 13, the second mixing section 122 is communicated and arranged on the outer peripheral wall of the first mixing section 121 and extends radially to the first mixing section 121, the first inlet 1221 is arranged at the end of the second mixing section 122 away from the first mixing section 121, the second inlet 1222 is arranged on the outer peripheral wall of the second mixing section 122, and the vaporization storage tank 4 is communicated with the first inlet 1221. The vaporization storage tank 4 is used for storing the N,N-dimethyl-1,3-propylene diamine.

[0037] The vaporization storage tank 4 is used for storing the N,N-dimethyl-1,3-propylene diamine, and realizes continuous supply of raw materials through the communication with the first inlet 1221, so that the raw materials can be fully vaporized or tempered before entering the mixing column body 12, the ideal reaction condition is achieved, the utilization rate of raw materials and the reaction activity are improved, the first mixing section 121 is arranged between the fractionating column body 11 and the reaction column body 13, so that the raw materials can be initially mixed before entering the reaction area, the reaction condition is uniform, and homogeneous liquid is provided for the subsequent reaction.

[0038] More preferably, a nozzle is arranged at the first inlet 1221, and the nozzle is directed towards the first mixing section 121 (the nozzle is not shown in the drawings).

[0039] The nozzle directs the N,N-dimethyl-1,3-propanediamine into the first mixing section 121 at a certain speed and pressure, which helps to atomize the propanediamine into fine droplets when entering the second mixing section 122, and the increased contact area between the fine droplets and the fatty acid facilitates rapid and uniform mixing, ensuring the uniformity and stability of the liquid material entering the second mixing section 122, and further facilitating the efficient performance of the subsequent reaction.

[0040] More preferably, a liquid guide sleeve 12221 is arranged at the second inlet 1222, and the liquid flow direction of the liquid guide sleeve 12221 forms an angle with the radial direction of the second mixing section 122.

[0041] Specifically, the liquid inlet direction of the liquid guide sleeve 12221 is directed towards the nozzle.

[0042] The liquid guide sleeve 12221 causes the flow direction of the fatty acid introduced from the second inlet 1222 to form an angle with the radial direction of the second mixing section 122, and the angled injection method can generate appropriate fluid disturbance and shear effect in the second mixing section 122, which helps to break the possible laminar flow or local dead zone, so that the fatty acid entering the second mixing section 122 is fully mixed with the vaporized propanediamine, preventing local concentration unevenness, thereby further improving the uniformity and stability of the entire reaction process.

[0043] More preferably, the second mixing section 122 is provided with a first flange 1211 near the end of the first mixing section 121, and the outer peripheral wall of the first mixing section 121 is provided with a second flange 1223, and the first flange 1211 and the second flange 1223 are connected by bolts.

[0044] The bolt connection of the first flange 1211 and the second flange 1223 allows the first mixing section 121 and the second mixing section 122 to have good assembly, which facilitates rapid disassembly and reassembly during production or shutdown maintenance, and is conducive to cleaning, maintenance and replacement of parts inside the reaction column 1, reducing downtime and maintenance costs; and through the flange connection, the relative position between the first mixing section 121 and the second mixing section 122 can be flexibly adjusted or modularly expanded when necessary, thereby meeting the needs of process condition changes or process upgrades.

[0045] More preferably, a connecting section 14 is connected between the first mixing section 121 and the reaction column body 13, and the inner diameter of the connecting section is smaller than the inner diameter of the reaction column body 13, and the connecting section 14 and the reaction column body 13 are smoothly connected.

[0046] When the liquid material in the first mixing section 121 enters the reaction column 13 with a larger inner diameter, it will quickly spread and slow down, and the liquid material will be evenly distributed in the reaction column 13, ensuring that the liquid material is fully mixed and improving the consistency of the reaction; the smooth connection between the connecting section 14 and the reaction column 13 avoids sudden geometric changes, preventing the generation of local turbulence or dead zones due to the rapid diffusion of fluid or sudden changes in flow rate, thereby avoiding the local accumulation or stagnation of reactants and ensuring stable and continuous reaction process.

[0047] More preferably, the heat preservation pipe 2 is a serpentine pipe, and the plane in which the serpentine pipe is located is parallel to the vertical direction.

[0048] The serpentine pipe structure increases the actual length of the pipe within a limited device volume, so that the liquid material flowing through the heat preservation pipe 2 stays longer in the heat preservation pipe 2, which is beneficial to more fully maintain and stabilize the temperature of the liquid material and ensure sufficient reaction of the liquid material.

[0049] Preferably, the flash evaporator 3 has a gas material outlet 31 that is in communication with the vaporization tank 4.

[0050] The flash evaporator 3 rapidly vaporizes the residual propylene diamine after reaction through flash evaporation, and the gas material outlet 31 allows the propylene diamine gas to be immediately guided out and into the interior of the vaporization tank 4, realizing the recycling of propylene diamine, minimizing the waste of propylene diamine, and improving the overall resource utilization efficiency.

[0051] Preferably, the upper end of the fractionating column 11 is in communication with a gas extraction device 5.

[0052] The gas extraction device 5 reduces the pressure in the fractionating column 11, allowing water vapor to be vaporized and extracted at a lower temperature, while propylene diamine is more likely to remain in the liquid phase, achieving effective separation and helping to save energy, with high fractionation efficiency; the gas extraction device 5 forms a relatively vacuum state in the internal space of the fractionating column, improving the vaporization rate of light components and helping to more thoroughly separate volatile components from heavy components, optimizing the entire fractionation process and achieving higher fractionation efficiency; and the gas extraction device 5 can prevent the risk of overpressure in the internal space of the reaction column 1, ensuring the safe operation of the device.

[0053] In conclusion, the utility model embodiment provides a kind of coconut amide dimethyl tertiary amine production device, its reaction column 1 includes by upper to lower sequentially communicating fractionating column body 11, mixed column body 12 and reaction column body 13, so that N,N-dimethyl-1,3-propanediamine and fatty acid immediately enter reaction and fractionation stage after mixing, reaction and fractionation are carried out simultaneously, N,N-dimethyl-1,3-propanediamine and fatty acid reaction generates byproduct water, in high temperature environment, water vapor and propylene diamine vapor are mixed and rise, are fractionated by fractionating column body 11, and the propylene diamine separated out flows back to reaction column body 13 and continues to carry out reaction, guarantee propylene diamine concentration, while production process is greatly shortened, need not be set respectively independent equipment or pause and wait, improve overall production efficiency;By integrating fractionation, mixing and reaction function in one, reaction column 1 uses vertical arrangement structure, greatly save the floor area, suitable for the production environment of limited space.

[0054] The above is only preferred embodiment of the utility model, it should be pointed out, for the ordinary skill in the art, without departing from the technical principle of the utility model, can make a number of improvements and substitutions, these improvements and substitutions also should be regarded as the protection scope of the utility model.

Claims

1. A device for producing cocamide dimethyl tertiary amine, characterized by, The utility model relates to a kind of reaction column and its application, including: Reaction column (1), the reaction column (1) includes by upper and lower sequentially communicating fractionating column body (11), mixing column body (12) and reaction column body (13), the mixing column body (12) has respectively for the first inlet (1221) and second inlet (1222) of N, N-dimethyl-1,3-propanediamine, fatty acid, the reaction column body (13) is filled with filler (131); Heat preservation pipe (2), one end of the heat preservation pipe (2) is connected with the lower end of reaction column body (13), and the other end of the heat preservation pipe (2) is provided with discharge valve (6); Flash evaporator (3), the flash evaporator (3) is communicated and arranged on the heat preservation pipe (2), and the flash evaporator (3) is used to remove residual propylene diamine after reaction.

2. The device for producing cocamide dimethyl tertiary amine according to claim 1, characterized by, Further including vaporization storage tank (4), the mixing column body (12) includes first mixing section (121) and second mixing section (122), the first mixing section (121) is communicated between the fractionating column body (11) and the reaction column body (13), the second mixing section (122) is communicated and arranged on the outer circumferential wall of the first mixing section (121), and extends radially to the first mixing section (121), the first inlet (1221) is opened at the end of the second mixing section (122) away from the first mixing section (121), the second inlet (1222) is opened on the outer circumferential wall of the second mixing section (122), the vaporization storage tank (4) is communicated with the first inlet (1221), and the vaporization storage tank (4) is used to store N, N-dimethyl-1,3-propanediamine.

3. The device for producing cocamidopropyl betaine according to claim 2, characterized by The first inlet (1221) is provided with a nozzle, and the nozzle faces the first mixing section (121).

4. The device for producing cocamide dimethyl tertiary amine according to claim 3, characterized by, The second inlet (1222) is provided with a liquid guide sleeve (12221), and the liquid flow direction of the liquid guide sleeve (12221) and the radial direction of the second mixing section (122) have an included angle.

5. The device for producing cocamide dimethyl tertiary amine according to claim 2, characterized by, The second mixing section (122) is provided with a first flange (1211) close to the end of the first mixing section (121), the outer circumferential wall of the first mixing section (121) is provided with a second flange (1223), and the first flange (1211) and the second flange (1223) are connected by bolts.

6. The device for producing cocamide dimethyl tertiary amine according to claim 2, characterized by, The first mixing section (121) and the reaction column body (13) are communicated with a connecting section (14), the inner diameter of the connecting section is smaller than the inner diameter of the reaction column body (13), and the connecting section (14) and the reaction column body (13) are smoothly connected.

7. The device for producing cocamide dimethyl tertiary amine according to claim 1, characterized by, The heat preservation pipe (2) is a serpentine pipe, and the plane where the serpentine pipe is located is parallel to the vertical direction.

8. The device for producing cocamide dimethyl tertiary amine according to claim 1, characterized by, The flash evaporator (3) has a gas outlet (31), and the gas outlet (31) is communicated with the vaporization storage tank (4).

9. The device for producing cocamide dimethyl tertiary amine according to claim 1, characterized by, The upper end of the fractionating column body (11) is communicated with an air extraction device (5).

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