Method for preparing chemical raw materials by using alkali method to process potassium fertilizer intermediate

Abstract

The invention discloses a method for preparing chemical raw materials by using an alkali method to process a potassium fertilizer intermediate, and the method specially includes the following steps: raw materials are dissolved and mixed, to be more specific, potassium hydroxide is dissolved with distilled water, then the potassium fertilizer intermediate is added for dissolving to get a mixed solution, the mass ratio of potassium fertilizer intermediate to potassium hydroxide is 1:2-5; and then by boiling, filtering, processing of a filtrate a, and processing of a filtrate b, baking and returning, the chemical raw material are prepared. According to the method, by the reprocessing of the potassium fertilizer intermediate, potassium feldspar utilization process steps are optimized, the potassium feldspar decomposition rate is improved, the problem of the shortage of potassium fertilizer raw material resources is alleviated, the comprehensive utilization rate of by-product is improved, the generation of waste water, waste gas and waste slag is reduced, the energy consumption is reduced, the technological process is simple, and the production cost for enterprises is saved.

Description

technical field [0001] The invention relates to chemical and chemical technology, in particular to a method for obtaining chemical raw materials from potassium fertilizer intermediates by alkaline treatment. Background technique [0002] There are abundant potassium-containing salt ore resources in the world, but most of them are insoluble water-containing potassium-containing salt ores; Occupying 0.66%, and concentrated in the Qinghai area, which leads to difficult mining and high transportation costs. According to statistics, the gap of potassium fertilizer in my country is still as high as 4 million tons per year. Therefore, the country still needs to spend a large amount of foreign capital to import potash fertilizers to meet agricultural needs every year. For this reason, it is necessary for us to develop and utilize water-insoluble potash-containing salt mines. [0003] Potassium feldspar is a common rock-forming mineral in the earth's crust. It belongs to silicate a...

AI Technical Summary

Problems solved by technology

However, various methods either have high temperature and high energy consumption, or complicated process routes and high equipment requirements, which lead to high costs and are not conducive to industrial promotion and production.

[0005] Although many achievements have been made in fertilizers, ceramics, white carbon black and molecular sieves in the process of extracting potassium from potassium feldspar ore in my country, the comprehensive utilization of potassium feldspar ore resources to produce chemical raw materials is still insufficient and energy-consuming higher

For example, in Patent No. 96120733.7 "A Method for Producing Potassium Fertilizer from Potassium-Containing Rock", the potassium-containing rock concentrate powder is mixed with soda ash or caustic soda, then roasted at high temperature to obtain potassium fertilizer, and molecular sieve powder is obtained, but for other resources therein If it is not extracted, the resources of potassium-containing rocks are wasted, and high-temperature roasting is required, which leads to high energy consumption, increases the ratio of input to output, and increases the production cost of the enterprise

Images