Method for producing calcium formate from sugar mill filter mud

Abstract

The invention relates to the field of industrial waste reutilization, and particularly discloses a method for producing calcium formate from sugar mill filter mud. The method comprises the followings steps: crushing the raw material sugar mill calcium carbonate filter mud, grinding, and adding 70 wt% formic acid solution into the filter mud while stirring until no bubble is generated, thereby completing the reaction; and regulating the pH value to 6-7 with 25 wt% lime cream, separating the reaction solution, and drying to obtain the product. The invention has the advantages of simple production technique, low cost, short technical process, low energy consumption and low investment; the formic acid and calcium carbonate filter mud can be directly used as the raw materials to synthesize the ideal calcium formate product by one step; and the purity and quality of the product satisfy the general demands.

Description

(1) Technical field [0001] The invention relates to the field of industrial waste reuse, in particular to a method for producing calcium formate by using sugar factory filter mud. (2) Background technology [0002] As the main production waste of sugar refinery, filter sludge has caused great pollution to the environment. It has attracted widespread attention at home and abroad, and the research on its resource utilization has also made great progress. Through industrial and agricultural applications, it can fully turn waste into treasure, which is of great practical significance to the development of the circular economy of the sugar industry, the promotion of the sustainable development of the sugar industry, the maximization of the economic and environmental benefits of the sugar industry, and the improvement of the competitiveness of the sugar industry. . At present, its applications mainly include the following aspects: [0003] (1) Limestone is produced as an ind...

AI Technical Summary

Problems solved by technology

[0007] At present, the annual output of filter mud reaches tens of millions of tons, which is difficult to handle, accumulates and occupies an area, wasting huge land resources

In addition to being used as industrial raw materials, the wet filter mud produced by domestic crushing of sugarcane sugar is effectively used to make biological fertilizers. The existing sugar production uses raw sugar to process and purify to produce white sugar, etc., and the water and organic nutrients of carbonic acid filter mud It cannot reach the standard of bio-fertilizer, which brings great difficulties for a large amount of filter mud consumption. At present, there is no relatively perfect method of processing and utilizing this kind of filter mud at home and abroad.