Methods of Quality Control in Aluminum Sulfate Production

Abstract

The invention discloses an aluminum sulfate production quality control method which is used for solving the technical problem in the prior art that the product quality is unqualified due to the fact that the content of insoluble matters and free acids in an aluminum sulfate product is hard to control. The method comprises the following steps: (a) putting sulfuric acid and aluminum hydroxide into water, enabling the added amount of sulfuric acid to be slightly excess than the proportion in a reaction formula during the adding of sulfuric acid and aluminum hydroxide, and keeping reaction for 25-35 minutes; (b) slowly adding a sodium aluminate or sodium hydroxide solution, stopping adding after a reaction solution changes into white transparent from light green, continuing to react for 10-30 minutes, and completing the reaction. According to the method, the sodium aluminate or sodium hydroxide solution is added, so that the complete reaction of aluminum hydroxide can be guaranteed, and the control of the content of the free acids can become simple.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to an improved method for product quality control in the production process of aluminum sulfate. Background technique [0002] In the prior art, the general method of using aluminum hydroxide and sulfuric acid to produce aluminum sulfate is: adding accurate metered sulfuric acid and water to the reactor, heating it to above 50 degrees by indirect or direct steaming, and then adding accurately metered hydroxide Aluminum reacts under stirring conditions, the reaction is an exothermic reaction, and the reaction process does not require heating. In the initial stage of the reaction, the speed of adding aluminum hydroxide can be faster, but attention should be paid to controlling the reaction not to be too violent to prevent the kettle from overflowing. After the addition of aluminum hydroxide is completed, continue to maintain the reaction, when the reaction solution turns from ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a kind of aluminum sulfate production quality control method, to solve the problem in the prior art that the product quality is unqualified due to the difficulty in controlling the content of insoluble matter and free acid in aluminum sulfate products