Synthetic method for xylonic acid
A synthesis method and technology of xylonic acid, applied in chemical instruments and methods, separation/purification of carboxylic acid compounds, preparation of carboxylate salts, etc., can solve problems such as large environmental pollution, harsh culture conditions, harsh reaction conditions, etc. Improve product quality, reduce production costs, and respond quickly
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Embodiment 1
[0036] A synthetic method for xylonic acid, comprising the following steps:
[0037] Add 30.51g of D-xylose to a 250ml four-neck flask, and dilute to 150g with water;
[0038] After mixing, add 45.76 g of activated carbon, feed oxygen under stirring, control the temperature of the oil bath at 48-50°C, and adjust the pH of the solution to 9.5-9.8 with a sodium hydroxide solution with a mass concentration of 25%.
[0039] After reacting for 6 hours, filter the activated carbon, and measure the xylose content in the obtained liquid by high performance liquid chromatography, the xylose content in the solution is 3.8%, and the calculated xylose conversion rate is 81.32%;
[0040] The sodium xylose solution obtained by filtering is passed through 732 cation exchange resins to obtain a xylose acid solution;
[0041] A chromatographic column AIltech C18 was used to detect the xylonic acid solution, and the peak appeared at about 10 minutes. Compared with the standard product, the con...
Embodiment 2
[0043] A synthetic method for xylonic acid, comprising the following steps:
[0044] Add 30.30g of D-xylose to a 250ml four-neck flask, and dilute to 150g with water;
[0045] After mixing, add 30.30 g of granular activated carbon, introduce oxygen under stirring, control the temperature of the oil bath at 45-48 ° C, and adjust the pH of the solution to 9.5-9.8 with a sodium hydroxide solution with a mass concentration of 25%;
[0046] After reacting for 6 hours, the activated carbon was filtered, and the xylose content in the obtained liquid was measured by high performance liquid chromatography. The xylose content in the solution was measured to be 5.8%, and the xylose conversion rate was calculated to be 71.29%;
[0047] The sodium xylose solution obtained by filtering is passed through 732 cation exchange resins to obtain a xylose acid solution;
[0048] Detected by chromatographic column Altech C18, the peak appeared at about 10min, compared with the standard, the conten...
Embodiment 3
[0050] A synthetic method for xylonic acid, comprising the following steps:
[0051] Add 46.05g of D-xylose to a 250ml four-neck flask, and dilute to 150g with water;
[0052] After mixing, add 69.08g of granular activated carbon, feed oxygen under stirring, control the temperature of the oil bath at 48-50°C, and adjust the pH to 9.2-9.5 with a sodium hydroxide solution with a mass concentration of 25%.
[0053] After reacting for 6 hours, the activated carbon was filtered, and the xylose content in the obtained liquid was measured by high performance liquid chromatography. The xylose content in the solution was measured to be 4.3%, and the calculated xylose conversion rate was 85.99%;
[0054] The sodium xylose solution obtained by filtering is passed through 732 cation exchange resins to obtain a xylose acid solution;
[0055]Detected with chromatographic column AIltech C18, the peak appeared at about 10min, compared with the standard product, the content of xylonic acid wa...
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