Triethylamine recovery processing method and device for production of acesulfame potassium

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...

Images