Method for removing chlorhydric acid and ferrous chloride from hydrolysed biomass glyc solution by diluted acid
A technology of dilute acid hydrolysis and ferrous chloride, applied in chemical instruments and methods, sugar derivatives, sugar derivatives, etc., can solve the problems of reducing yeast fermentation efficiency, high solubility, harmfulness, etc., and achieves easy operation and high salt concentration. The effect of reduction and low processing cost
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Embodiment 1
[0026] 100ml fresh anion exchange resin D315 is packed in the first anion column, 100ml fresh anion exchange resin D315 is packed in the second anion column, and 100ml fresh cation exchange resin 732 is packed in the cation column.
[0027] All resins were provided by Huachang Polymer Co., Ltd., East China University of Science and Technology. Resin volumes mentioned here and below are apparent volumes.
[0028] Take 500ml containing 2% HCl, 2% FeCl 2 And a solution of 3% glucose, make it pass through the first anion column, the cation column and the second anion column successively at normal pressure and 20°C. It takes 10 minutes to pass through the first anion column, 10 minutes to pass through the cation column, and 10 minutes to pass through the second anion column.
[0029] The acidity of the solution that goes out of the first anion exchange column is pH=2
[0030] Measure the pH of the final solution to 5.0, FeCl 2 The concentration is 0.00364kmol / m 3 .
Embodiment 2
[0032] The first anion column, the resin type and loading amount packed in the second anion column and cation column are all equal to embodiment 1.
[0033] Take 500ml containing 2% HCl, 0.5% FeCl 2 And a solution of 3% glucose, make it pass through the first anion column, the cation column and the second anion column successively at normal pressure and 20°C. It takes 10 minutes to pass through the first anion column, 5 minutes to pass through the cation column, and 10 minutes to pass through the second anion column.
[0034] The acidity of the solution that goes out of the first anion exchange column is pH=2
[0035] The pH of the final solution was determined to be 5.6, FeCl 2 The concentration is 0.00187kmol / m 3 .
Embodiment 3
[0037] The first anion column, the resin type and loading amount packed in the second anion column and cation column are all equal to embodiment 1. However, the anion resins packed in the first anion column and the second anion column are regenerated after saturation, and the resin containing 1kmol / m is used for regeneration. 3 NaOH and 3kmol / m 3 Sodium chloride solution. The cation resin packed in the cation exchange column is saturated with 1kmol / m 3 hydrochloric acid solution regeneration.
[0038] Take 500ml containing 2% HCl, 0.5% FeCl 2 And a solution of 3% glucose, make it pass through the first anion column, the cation column and the second anion column successively at normal pressure and 20°C. It takes 10 minutes to pass through the first anion column, 5 minutes to pass through the cation column, and 10 minutes to pass through the second anion column.
[0039] The acidity of the solution that goes out of the first anion exchange column is controlled at pH=2
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