A prep work technique of Ascorbyl Magnesium Phosphate, including the adhering to procedure actions:
( 1) Include 110Kg vitamin C, 8.8 Kg anhydrous calcium chloride, and 110Kg deionized water into a 500L response kettle at -10 ° C, stir for 2 hrs, and afterwards add 30% sodium hydroxide liquid remedy dropwise to adjust the pH. is 5, after that include 110Kg of salt trimetaphosphate, maintain the temperature level at 25 ° C, as well as react for 2 hours. The obtained reactant is calcium vitamin C ester;
( 2) Add vitamin C ester calcium into a 500L barrel cleaner to clean with water, and afterwards utilize sulfuric acid to adjust the pH to 1.5. The obtained reactant is vitamin C phosphate;
( 3) The vitamin C phosphate goes through nanofiltration membrane filtration via a rolled nanofiltration membrane layer filter. The temperature at the inlet of the rolled nanofiltration membrane filter is 120 ° C, and also the temperature at the electrical outlet of the rolled nanofiltration membrane filter is 30 ° C; The nanofiltration membrane layer has nano-scale pores, and also the molecular weight cutoff of the nanofiltration membrane layer is 500. The roll-type nanofiltration membrane layer filter has a high elimination price of inorganic salts, with an elimination rate of 90%;.
( 4) Add the filtrate obtained by filtering in step (3) right into a 500L reaction kettle, go through the weakly standard anion exchange material, as well as elute with 0.05 M hydrochloric acid and also 0.5 M hydrochloric acid in sequence. Gather the eluted component, and also the eluted component is stirred continuously. Usage magnesium oxide to change the pH to 7, and also the obtained catalyst is vitamin C magnesium phosphate;.
( 5) Filter magnesium vitamin C phosphate through a turned on carbon filter to remove the precipitate. The filtrate is concentrated under reduced stress at 30 ° C to one-fifth of the initial volume. Add ethanol with a volume of 3 times the concentrated filtrate and a web content of 95%, and after that spray it with Drying with a dryer, the drying temperature level is 140 ° C, and the drying time is thirty minutes, to acquire 79.85 KG of white magnesium vitamin C phosphate, with a material of 97.75%.