Extraction method of erythritol

[0036] A kind of extraction method of erythritol provided by the invention is characterized in that: comprise the following steps:

[0037] S1: After the fermentation liquid is inactivated, the temperature of the feed liquid is 70°C to 75°C, filter the clear liquid with a ceramic membrane filter element, and wait for use. Rinse the bacteria with pure water to 10g / L when the washing is complete, filter the same, and then mixed with serum;

[0038] S2: filter the clear liquid obtained in S1 with plate and frame carbon to remove some impurities in the clear liquid;

[0039] S3: Pour the clear liquid after carbon filtration in S2 into the decolorization tank, the temperature of the feed liquid is ≧70°C, and then add 3‰~5‰ powdered activated carbon, the stirring time is ≧0.5h, and then filter out the clear liquid with a plate frame;

[0040] S4: Use a multi-effect evaporator to condense the clear liquid after decolorization in S3 to 700g / L-800g / L, and send it out to the crystal

[0057] A kind of extraction method of erythritol provided by the invention is characterized in that: comprise the following steps:

[0058] S1: After the fermentation liquid is inactivated, the temperature of the feed liquid is 70°C, filter the clear liquid with a ceramic membrane filter element, and wait for use. Rinse the bacteria with pure water to 10g / L when the washing is over, filter in the same way, and then mix with the clear liquid mix;

[0059] S2: filter the clear liquid obtained in S1 with plate and frame carbon to remove some impurities in the clear liquid;

[0060] S3: Pour the clear liquid after carbon filtration in S2 into the decolorization tank, the temperature of the feed liquid is ≧70°C, then add 3‰ powdered activated carbon, the stirring time is ≧0.5h, and then filter out the clear liquid with a plate frame;

[0061] S4: condense the clear liquid after decolorization in S3 to 700g / L with a multi-effect evaporator, and go out to the crystallization tank;

[0078] A kind of extraction method of erythritol provided by the invention is characterized in that: comprise the following steps:

[0079] S1: After the fermentation liquid is inactivated, the temperature of the feed liquid is 72.5°C, filter the clear liquid with a ceramic membrane filter element, and wait for use. Rinse the bacteria with pure water to 10g / L when the washing is over, filter in the same way, and then mix with the clear liquid mix;

[0080] S2: filter the clear liquid obtained in S1 with plate and frame carbon to remove some impurities in the clear liquid;

[0081] S3: Pour the clear liquid after carbon filtration in S2 into the decolorization tank, the temperature of the feed liquid is ≧70°C, then add 4‰ powdered activated carbon, the stirring time is ≧0.5h, and then filter out the clear liquid with a plate frame;

[0082] S4: condense the clear liquid after decolorization in S3 to 750g / L with a multi-effect evaporator, and go out to the crystallization tank