Triethylamine recovery processing method and device for production of acesulfame potassium

A technology for recovery and treatment of triethylamine, applied in the purification/separation of amino compounds, organic chemistry, etc., can solve the problems of large material loss, poor separation effect, complicated operation, etc., and achieve the effects of low cost, convenient operation and simple equipment

Active Publication Date: 2008-04-09
ANHUI JINGHE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome the disadvantages of large material loss, poor separation effect, high energy consumption, complicated operation and high cost in the prior art and propose a triethylamine recovery treatment method and device

Method used

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  • Triethylamine recovery processing method and device for production of acesulfame potassium
  • Triethylamine recovery processing method and device for production of acesulfame potassium
  • Triethylamine recovery processing method and device for production of acesulfame potassium

Examples

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Embodiment 1

[0023] Embodiment one: as shown in Figure 1, distillation kettle adopts 5000 liters of fractionation tower kettle (1), and its top is provided with elongated neck (2), establishes a water condenser (2a) at the top of neck (2) , Cooled with circulating water, it is only turned on at 80°C-85°C to condense triethylamine. Low-boiling impurities such as dichloromethane are first condensed with a brine condenser (3), and a collector (4) is connected with a pipeline below the brine condenser (3).

[0024] The crude product triethylamine in the previous process is at 30 DEG C, and about 25% of water is dissolved, and it is pumped into the fractionation column (1), and the crude product triethylamine liquid is heated at about 40 DEG C for about 30 minutes. Low-boiling impurities such as methyl chloride are condensed with brine condensation (3), and then collected by collector (4). Then heat up to 83 DEG C again, open the water condenser at the top of neck (2) simultaneously, the triet...

example example 2

[0025] Example example two: as shown in Figure 2, the top of the slender neck (2) of fractionation column (1) is not provided with circulating water condenser, and vaporized material is all condensed with brine condenser (3), and brine condenser (3) Next pipe a collector (4). Also connect the return pipe to the elongated neck (2) at the outlet of the condenser (3).

[0026] The crude triethylamine in the previous process is about 30°C, and about 20% of water is dissolved. It is pumped into the heating kettle, and the temperature is raised at about 40°C. It takes about 30 minutes. The brine condenser (3) condenses and collects with collector (4). Then close the collection valve F, open the reflux valve H, and continue to heat up to 83°C for 28 minutes, during which the partially vaporized triethylamine is condensed with brine (3) and then refluxed to the elongated neck of the fractionating tower (1) ( 2). When the temperature is 83°C, keep the heat preservation for more than...

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Abstract

The invention relates to a triethylamine reclaim treatment method and the devices in the production of acesulfame-K, which is characterized in that the method includes the following steps: a. the crude triethylamine containing water is put into a distillation kettle (1), which is heated to the temperature of 38 DEG C to 42 DEG C, the time is about 20 to 40 minutes, the dichloromethane and other impurities with the low boiling points which are contained in the crude triethylamine are firstly evaporated, collected and then are condensed and collected by a condenser (3); b. the heating is carried out continually to about 83 DEG C, the temperature is kept for more than 30 minutes, which ensures that the water and triethylamine are placed still for layer separation, a lower layer is water, an upper layer is triethylamine, and triethylamine of the upper layer can be collected after the water is drained completely from the bottom of a kettle. Finally, the collected triethylamine is dried by the solid potassium hydroxide or a molecular screen, so the water content of triethylamine can be lower than 0.1 percent. The invention has the advantages of simple using equipment, convenient operation, safety, reliability, low cost, improved reclaim ratio of the product and significantly reduced operating cost.

Description

Technical field: [0001] The invention relates to a method and device for recovering and treating triethylamine in the production of acesulfame potassium. Background technique: [0002] Acesulfame K, chemical name acesulfame potassium, commonly known as AK sugar, is a fourth-generation synthetic sweetener with a sweetness 200 times that of sucrose. It is an ideal sweetener that is safe, heat-resistant, good in taste, does not metabolize or accumulate in the body, and has stable physical and chemical properties. Widely used in food, beverage, medicine, cosmetics, daily necessities. [0003] There are many synthetic methods of acesulfame potassium. At present, the synthetic route of relatively advanced, easy-to-obtained raw materials, non-toxic and short steps is selected at home and abroad; , Acetaminosulfonic acid, dehydration and cyclization with sulfur trioxide, and then neutralized with potassium hydroxide to obtain acesulfame potassium, which is concentrated, decolorize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D291/06C07C211/05C07C209/86
Inventor 杨迎春
Owner ANHUI JINGHE IND
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