Purifying method for calcium gluconate solution

Abstract

The invention discloses a method for purifying calcium gluconate solution. The key points of the technology are: the calcium gluconate solution is first ultrafiltered through a membrane device to filter out macromolecular impurities such as pigments, proteins and polysaccharides in the solution, and then the ultrafiltered solution is nanofiltered through a membrane device to filter Remove most of the water therein and make the concentration of the solution reach 10%, then crystallize smoothly and generate solid calcium gluconate at one time. Due to the concentration and removal of impurities of calcium gluconate solution under normal temperature conditions, the quality and yield of the product are effectively improved; and under the premise of not increasing power consumption, the coal consumption of steam concentration and the cost of impurity cleaning are eliminated. Water consumes two costs, and the filtered water is of good quality, so there will be no waste water pollution. In addition, the process of the present invention is simple, the equipment cost is low, and the operation is easy.

Description

technical field [0001] The invention relates to a method for purifying calcium gluconate solution, which belongs to the technical field of medicine and chemical industry. Background technique [0002] At present, the purification of calcium gluconate solution usually uses the evaporator to concentrate the water in the solution with the high temperature generated by steam, and then crystallizes the concentrated calcium gluconate, and then uses a centrifuge to wash off the calcium gluconate with water. Impurities such as pigments, proteins and polysaccharides in crystals. Since the calcium gluconate solution is concentrated at high temperature, it will damage the quality of calcium gluconate; while washing with water to remove impurities such as pigments, proteins and polysaccharides in the calcium gluconate crystals, it will also be reduced accordingly. The yield of the product is reduced; and its purification process is complicated, the cost is high, and the environmental p...

AI Technical Summary

Problems solved by technology

Since the calcium gluconate solution is concentrated at high temperature, it will damage the quality of calcium gluconate; while washing with water to remove impurities such as pigments, proteins and polysaccharides in the calcium gluconate crystals, it will also be reduced accordingly. The yield of the product is improved; and its purification process is complicated, the cost is high, and the environmental pollution is relatively large

According to the frame calculation: the concentration of a ton of calcium gluconate solution requires about 5 tons of coal; washing to remove impurities in the calcium gluconate crystals requires 12 tons of water, 5 laborers, and a large amount of waste water