CN219334152U

CN219334152U - Low-salt sodium lauroyl glutamate synthesizer

Info

Publication number: CN219334152U
Application number: CN202223486883.0U
Authority: CN
Inventors: 肖建平; 陈松; 李勇奇
Original assignee: Sichuan Flower's Song Fine Chemical Co ltd
Current assignee: Sichuan Flower's Song Fine Chemical Co ltd
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-07-14
Anticipated expiration: 2032-12-26

Abstract

The utility model discloses a low-salt sodium lauroyl glutamate synthesis device, which comprises a hydrolysate feeding system, an acylation reaction kettle, an electrodialysis desalination system, a decoloring concentration tank and a filter plate frame which are sequentially connected through a process pipeline; the hydrolysate feeding system comprises an acidolysis kettle and an alkaline hydrolysis kettle which are connected in parallel; the acidolysis kettle and the alkaline hydrolysis kettle are respectively provided with an acidolysis kettle high-level tank and an alkaline hydrolysis kettle high-level tank for feeding; the acylation reaction kettle comprises a lauroyl chloride metering tank for adding lauroyl chloride into the kettle and a refrigerator for adjusting the acylation reaction temperature, and has the advantages that: 1) The method firstly provides and realizes the preparation of low-salt sodium lauroyl glutamate by using the monosodium glutamate final mother liquor, solves the problem that the monosodium glutamate final mother liquor lacks an effective treatment path, and simultaneously reduces the production cost of the low-salt sodium lauroyl glutamate; 2) In the operation, water is used as a solvent, so that the influence of the solvent on the environment is obviously reduced; 3) The electrodialysis desalting system is adopted, so that the wastewater amount is small, and the inorganic salt content is lower.

Description

Low-salt sodium lauroyl glutamate synthesizer

Technical Field

The utility model relates to a chemical production device, in particular to a lauroyl sodium glutamate synthesis device.

Background

Sodium lauroyl glutamate is an amino acid type surfactant, has mild performance, is easy to biodegrade, has small irritation to eyes and skin, and does not generate anaphylactic reaction; excellent foaming performance and good compatibility with other surfactants. The current common synthesis process of sodium lauroyl glutamate is to perform condensation reaction of lauric acid and glutamic acid in acetone, remove the acetone solvent by evaporation, and neutralize to obtain the product. The method uses acetone as a solvent, and has the defects of incomplete solvent removal, influence on product quality and the like. Or lauroyl chloride and glutamic acid are used as raw materials, acetone is used as a solvent, and the base catalysis reaction has the defects of incomplete solvent removal, environmental influence and the like. Both the above two methods use sodium glutamate monohydrate as raw material, the manufacturing cost is relatively high, and the product application and popularization have certain limitation.

In the process of refining food grade monosodium glutamate (monosodium glutamate monohydrate), the production process is to use sodium glutamate solution to carry out multiple circulation decoloration and concentration crystallization, the byproduct mother liquor finally produced by the process is the final monosodium glutamate mother liquor, and the final monosodium glutamate mother liquor contains a large amount of inorganic salt impurities and sodium pyroglutamate, so that the final monosodium glutamate mother liquor is difficult to treat, industrial grade or feed grade low-added-value glutamic acid is mainly recovered through hydrochloric acid hydrolysis, the treated wastewater is large in amount, ammonia nitrogen, sodium chloride or ammonium chloride content is high, and wastewater treatment cost is high.

Disclosure of Invention

The utility model provides a low-salt sodium lauroyl glutamate synthesis device, which aims to solve the problem that the last monosodium glutamate mother liquor lacks an effective treatment way, reduce the production cost of low-salt sodium lauroyl glutamate and reduce the influence of a solvent on the environment.

The technical scheme adopted for solving the technical problems is as follows: the low-salt sodium lauroyl glutamate synthesizing device comprises a hydrolysate feeding system, an acylation reaction kettle, an electrodialysis desalination system, a decoloration concentration tank and a filter plate frame which are sequentially connected through a process pipeline; the hydrolysate feeding system comprises an acidolysis kettle and an alkaline hydrolysis kettle which are mutually connected in parallel; the acidolysis kettle and the alkaline hydrolysis kettle are respectively provided with an acidolysis kettle high-level tank and an alkaline hydrolysis kettle high-level tank for feeding; the acylation reaction kettle comprises a lauroyl chloride metering tank for adding lauroyl chloride into the kettle and a refrigerator for adjusting the acylation reaction temperature.

As a further improvement of the utility model, the acylation reaction kettle further comprises a reaction kettle high-level tank for adding liquid alkali.

As a further improvement of the utility model, the acylation reaction kettle further comprises a circulating pipeline for material circulating reaction and a first circulating pump arranged on the circulating pipeline.

As a further improvement of the present utility model, a wastewater tank for collecting wastewater produced by the acylation reaction tank and the decoloring concentration tank is further included, and the wastewater tank is connected with the acylation reaction tank and the decoloring concentration tank by a vacuum pump for pumping wastewater, respectively.

The beneficial effects of the utility model are as follows: 1) The method firstly provides and realizes the preparation of low-salt sodium lauroyl glutamate by using the monosodium glutamate final mother liquor, solves the problem that the monosodium glutamate final mother liquor lacks an effective treatment path, and simultaneously reduces the production cost of the low-salt sodium lauroyl glutamate; 2) In the actual operation and production of the device, water is used as a solvent, so that the influence of the solvent on the environment is obviously reduced; 3) The device adopts an electrodialysis desalination system, the waste water amount is less, and the inorganic salt content is lower.

Drawings

FIG. 1 is a schematic diagram showing the structure of a low-salt sodium lauroyl glutamate synthesizer according to the present utility model.

Marked in the figure as: f1-acidolysis kettle, F2-alkaline hydrolysis kettle, F3-acylation reaction kettle, F4-decoloration concentration tank, C1-acidolysis kettle high-level tank, C2-alkaline hydrolysis kettle high-level tank, C3-reaction kettle high-level tank, D-lauroyl chloride metering tank, H-refrigerator, E1-first circulating pump, E2-material pumping pump, E3-second circulating pump, I-vacuum pump, M-electrodialysis desalination system, N-filter plate frame, G-wastewater tank and B1-B15-valve.

Detailed Description

The utility model will be further described with reference to the drawings and examples.

As shown in figure 1, the low-salt sodium lauroyl glutamate synthesizing device comprises a hydrolysate feeding system, an acylation reaction kettle F3, an electrodialysis desalination system M, a decoloration concentration tank F4 and a filter plate frame N which are sequentially connected through a process pipeline; the device also comprises a wastewater tank G for collecting wastewater produced by the acylation reaction kettle F3 and the decoloration concentration tank F4, wherein the wastewater tank G is respectively connected with the acylation reaction kettle F3 and the decoloration concentration tank F4 through a vacuum pump I for extracting wastewater. The hydrolysate feeding system comprises an acidolysis kettle F1 and an alkaline hydrolysis kettle F2 which are mutually connected in parallel; the acidolysis kettle F1 and the alkaline hydrolysis kettle F2 are respectively provided with an acidolysis kettle high-level tank C1 and an alkaline hydrolysis kettle high-level tank C2 for feeding; the acylation reaction kettle F3 comprises a lauroyl chloride metering tank D for adding lauroyl chloride into the kettle and a refrigerator H for adjusting the acylation reaction temperature. The acylation reaction kettle F3 further comprises a reaction kettle high-level groove C3 for adding liquid alkali. The acylation reaction kettle F3 further comprises a circulating pipeline for material circulating reaction and a first circulating pump E1 arranged on the circulating pipeline.

When the method is used, a part of monosodium glutamate final mother liquor is added into an acidolysis kettle F1 from an acidolysis kettle high-level tank C1 and hydrolyzed under an acidic condition with the pH value of 1.0, and the other part of monosodium glutamate final mother liquor is added into an alkaline hydrolysis kettle F2 from an alkaline hydrolysis kettle high-level tank C2 and hydrolyzed under an alkaline condition with the sodium hydroxide concentration of 1.5mol/L, wherein the hydrolysis temperatures are 95 ℃ and the hydrolysis times are 3 hours, and an acidic hydrolysate and an alkaline hydrolysate are respectively obtained after the hydrolysis is finished;

the acidic hydrolysate and the alkaline hydrolysate are sent into an acylation reaction kettle F3 to be mixed, and the pH value of the mixed material is 9.5 by adjusting the mixing proportion of the acidic hydrolysate and the alkaline hydrolysate; dropwise adding lauroyl chloride into an acylation reaction kettle F3 according to the molar ratio of sodium glutamate to lauroyl chloride in the mixed hydrolysate of 1:1.0 by a lauroyl chloride metering tank D for reaction, controlling the dropwise adding time of lauroyl chloride to be 4 hours, simultaneously adjusting the pH value of a reaction system to 9.8 by a sodium hydroxide solution, controlling the temperature to be 20 ℃ for reaction for 6 hours by a refrigerator H after the dropwise adding of lauroyl chloride is finished, then heating to 70 ℃ for reaction for 2 hours, obtaining a reaction product, and adjusting the pH value to 8.2;

delivering the reaction product into an electrodialysis desalting system M, and carrying out desalting treatment on the reaction product to obtain a high-purity intermediate product, wherein the mass percentage content of inorganic salt impurities of the high-purity intermediate product is 0.08%;

and (3) feeding the high-purity intermediate product into a decoloring and concentrating tank F4, decoloring by using active carbon, filtering N by using a plate frame, and concentrating in vacuum until the mass percentage content of the active substances of the low-salt sodium lauroyl glutamate reaches 29.5%, thereby obtaining the low-salt sodium lauroyl glutamate.

The obtained low-salt sodium lauroyl glutamate was found to have a pale yellow transparent liquid, sodium chloride content of 0.11%, active content of 29.5% and color APHA of 67.

Claims

1. The low-salt sodium lauroyl glutamate synthesizer is characterized in that: comprises a hydrolysate feeding system, an acylation reaction kettle (F3), an electrodialysis desalination system (M), a decoloration concentration tank (F4) and a filter plate frame (N) which are sequentially connected through a process pipeline; the hydrolysate feeding system comprises an acidolysis kettle (F1) and an alkaline hydrolysis kettle (F2) which are mutually connected in parallel; the acidolysis kettle (F1) and the alkaline hydrolysis kettle (F2) are respectively provided with an acidolysis kettle high-level tank (C1) and an alkaline hydrolysis kettle high-level tank (C2) for feeding; the acylation reaction kettle (F3) comprises a lauroyl chloride metering tank (D) for adding lauroyl chloride into the kettle and a refrigerator (H) for adjusting the acylation reaction temperature.

2. The low-salt sodium lauroyl glutamate synthesizer of claim 1, wherein: the acylation reaction kettle (F3) further comprises a reaction kettle high-level tank (C3) for adding liquid alkali.

3. The low-salt sodium lauroyl glutamate synthesizer of claim 1, wherein: the acylation reaction kettle (F3) further comprises a circulating pipeline for material circulating reaction and a first circulating pump (E1) arranged on the circulating pipeline.

4. The low-salt sodium lauroyl glutamate synthesizer of claim 1, wherein: the device also comprises a wastewater tank (G) for collecting wastewater produced by the acylation reaction kettle (F3) and the decoloration concentration tank (F4), wherein the wastewater tank (G) is respectively connected with the acylation reaction kettle (F3) and the decoloration concentration tank (F4) through a vacuum pump (I) for extracting wastewater.