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Production method of citric acid gypsum
The invention discloses a production method of citric acid gypsum. The production method comprises the steps of (1) reacting calcium hydrogen citrate with sulfuric acid to prepare a citric acid-mixed citric acid gypsum raw material; (2) adding water into the citric acid gypsum raw material obtained in the step (1) for size mixing, then adding sulfuric acid, and controlling the PH to be 2.1-2.3, wherein the mass ratio of the citric acid gypsum raw material to the water is 7: 13, and crude citric acid gypsum is obtained through filtering; (3) carrying out instantaneous airflow drying on the crude citric acid gypsum obtained in the step (2) at the temperature of 500-600 DEG C; and (4) carrying out steam calcination for 40-50 minutes by using a steam calcining machine, and obtaining a citric acid gypsum finished product when the pH value of the material is 7. The obtained citric acid gypsum is high in structural strength, citric acid and crystal water mixed in the citric acid gypsum are removed to the maximum extent, and the residual amount of the citric acid is small.
本发明公开了一种柠檬酸石膏生产方法，包括以下步骤：(1)通过柠檬酸氢钙和硫酸反应制备得到夹杂柠檬酸的柠檬酸石膏原料；(2)将步骤(1)得到的柠檬酸石膏原料加入水调浆，然后加入硫酸，控制PH为2.1‑2.3，其中柠檬酸石膏原料与水的质量比为7：13，过滤得到粗柠檬酸石膏；(3)将步骤(2)得到的粗柠檬酸石膏在500‑600℃下瞬间气流干燥；(4)利用蒸汽煅烧机蒸汽煅烧40‑50min，物料PH为7时，得到柠檬酸石膏成品。本发明得到的柠檬酸石膏结构强度高，柠檬酸石膏内部夹杂的柠檬酸和结晶水最大限度的被去除，柠檬酸残余量小。
Production method of citric acid gypsum
The invention discloses a production method of citric acid gypsum. The production method comprises the steps of (1) reacting calcium hydrogen citrate with sulfuric acid to prepare a citric acid-mixed citric acid gypsum raw material; (2) adding water into the citric acid gypsum raw material obtained in the step (1) for size mixing, then adding sulfuric acid, and controlling the PH to be 2.1-2.3, wherein the mass ratio of the citric acid gypsum raw material to the water is 7: 13, and crude citric acid gypsum is obtained through filtering; (3) carrying out instantaneous airflow drying on the crude citric acid gypsum obtained in the step (2) at the temperature of 500-600 DEG C; and (4) carrying out steam calcination for 40-50 minutes by using a steam calcining machine, and obtaining a citric acid gypsum finished product when the pH value of the material is 7. The obtained citric acid gypsum is high in structural strength, citric acid and crystal water mixed in the citric acid gypsum are removed to the maximum extent, and the residual amount of the citric acid is small.
本发明公开了一种柠檬酸石膏生产方法，包括以下步骤：(1)通过柠檬酸氢钙和硫酸反应制备得到夹杂柠檬酸的柠檬酸石膏原料；(2)将步骤(1)得到的柠檬酸石膏原料加入水调浆，然后加入硫酸，控制PH为2.1‑2.3，其中柠檬酸石膏原料与水的质量比为7：13，过滤得到粗柠檬酸石膏；(3)将步骤(2)得到的粗柠檬酸石膏在500‑600℃下瞬间气流干燥；(4)利用蒸汽煅烧机蒸汽煅烧40‑50min，物料PH为7时，得到柠檬酸石膏成品。本发明得到的柠檬酸石膏结构强度高，柠檬酸石膏内部夹杂的柠檬酸和结晶水最大限度的被去除，柠檬酸残余量小。
Production method of citric acid gypsum
一种柠檬酸石膏生产方法
DU SHENGWEI (author) / SHI ZHEN (author)
2021-07-30
Patent
Electronic Resource
Chinese
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