Forced circulating extraction method in production of acesulfame

Abstract

The invention relates to a forced circulating extraction method in production of acesulfame. The forced circulating extraction method comprises the following steps: injecting an extraction agent to an extraction mixer through an extraction pump, starting a forced circulation pump to enable the extraction agent to be circulated in the mixer, starting a hydrolytic acid pump, pumping the hydrolytic acid to the extraction mixer, adjusting the flow of the extraction agent, enabling the ratio of the hydrolytic acid to the extraction agent to be 1:2 to 1:4, in an overflow port at the topmost end of the mixer, with increase of feedstock in the extraction agent pump and the hydrolytic acid pump, overflowing a part of material out of the extraction mixer, feeding the overflown material to a separator to be separated, extracting the separated acid again in the extraction agent, and feeding the organic phase to an organic phase slot for neutralization. The forced circulating extraction method disclosed by the invention has the advantages that the forced circulating extraction is high in stability, the mixing intensity is increased, and the product yield is increased; the extraction effect of the hydrolytic acid is improved, the content of the organic matters in the waste acid can be effectively lowered, the processing difficulty can be reduced, and the contamination can be reduced; the method can be used to simplify production operation and reduce the labor intensity of workers.

Description

technical field [0001] The invention relates to a production method of acesulfame potassium, in particular to a forced circulation extraction method. Background technique [0002] In the traditional acesulfame potassium production process, the sulfonation reaction is followed by extraction, and the extracted organic phase is then neutralized. The extraction process is as follows: figure 1 As shown, the extractant and the hydrolysis acid phase directly pass through the extraction tower, contact and mix with each other through the countercurrent principle, and extract the organic phase in the hydrolysis acid phase. However, due to the tower extraction, in order to meet the production needs, the tower diameter is large. The extraction agent and the hydrolysis acid phase tend to generate bias flow in the tower, resulting in uneven contact mixing and low extraction efficiency. Contents of the invention [0003] The object of the present invention is exactly to overcome the sho...

AI Technical Summary

Problems solved by technology

[0002] In the traditional acesulfame potassium production process, the sulfonation reaction is followed by extraction, and the extracted organic phase is then neutralized. The extraction process is as follows: figure 1 As shown, the extractant and the hydrolysis acid phase directly pass through the extraction tower, contact and mix with each other through the principle of countercurrent, and extract the organic phase in the hydrolysis acid phase. However, due to the tower extraction, in order to meet the production needs, the tower diameter is relatively large. Extractant and hydrolyzed acid phase tend to produce bias flow in the tower, resulting in uneven contact mixing and low extraction efficiency

Images