Method for preparing impurity-removing and decoloring composition

Abstract

The invention relates to a preparation method of an impurity-removing and decolorizing composition. The clay is put into a crusher for coarse crushing, and the coarsely crushed clay enters a ball mill. At the same time, water and a dispersant are added into the ball mill according to a certain mass ratio, and the clay is crushed. Grinding into ore pulp, putting the ore pulp into the reaction tank and acid under certain temperature conditions, and activating according to a certain mass ratio, after activating for a period of time, washing with water, pressure filtration, drying and crushing to obtain activated clay, activated clay, anhydrous inorganic The salt and the adsorbent are uniformly mixed according to the mass ratio of 70-95:1-10:4-20 to obtain the impurity-removing and decolorizing composition. By adding the dispersant, the method can reduce the cohesive force between the clays, prevent the adhesion between the clay particles, and reduce the amount of acid used and the amount of water used for washing.

Description

technical field [0001] The invention relates to a preparation method of an impurity-removing and decolorizing composition. Background technique [0002] Bentonite is an advantageous resource in my country, and its reserves rank first in the world, but its development and utilization started late, its deep processing technology is backward, its product quality is poor, and its production scale is small. The high-quality impurity-removing and decolorizing compositions used in domestic oil and fat departments still need to be imported from abroad . The production capacity of impurity-removing and decolorizing compositions in the United States has reached more than 4 million tons / year, while that in my country is only about 200,000 tons / year. According to statistics, the demand for impurity-removing and decolorizing compositions in my country has been increasing at an annual rate of 7-8% in recent years. After the investigation and analysis of the domestic market, only the mark...

AI Technical Summary

Problems solved by technology

[0003] The traditional activated clay is the direct reaction between clay pulp and acid. Due to the high viscosity of clay, the clay particles flocculate during the reaction, resulting in a slower reaction between acid and clay pulp, and a longer reaction time. In order to improve and reduce the reaction time, The method currently adopted is to increase the amount of acid, which leads to the consumption of a large amount of water when the activated clay is washed, resulting in a waste of acid and water, and the activity of the activated clay is also low