Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing potassium silicate from potassium feldspar

A technology of potassium feldspar and potassium silicate, which is applied in the field of comprehensive utilization of potassium feldspar decomposition, can solve problems such as small reserves, and achieve the effects of high recovery rate, high output and continuous production.

Inactive Publication Date: 2016-03-30
LUOYANG LVREN ENVIRONMENTAL EQUIP
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the reserves of soluble potassium salt resources that have been identified in my country are not large, and it is difficult to meet the agricultural demand for potassium fertilizers. However, insoluble potassium salt rocks represented by potassium feldspar are almost distributed in most provinces and regions of my country, and their geological reserves are about Ten billion tons

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1 of the present invention provides a kind of method utilizing potassium feldspar to prepare potassium silicate, it comprises the following steps:

[0016] Decomposition of potassium feldspar: fully mix potassium feldspar, ammonium fluoride, and 98% sulfuric acid according to the mass ratio of 1:2:1.7, and react at 220°C under autogenous pressure to obtain the decomposition residue of potassium feldspar and SiF-containing 4 The decomposition gas; Among them, the main reactions in this process are:

[0017] NH 4 F=HF+NH 3 ,

[0018] 2K[AlSi 3 o 8 ]+24HF+4H 2 SO 4 =K 2 SO 4 +Al 2 (SO 4 ) 3 +6SiF 4 ↑+16H 2 O;

[0019] Gas absorption: for the SiF containing 4 The decomposed gas of the decomposed gas is subjected to dedusting treatment, then adsorbed by ethanol aqueous solution, filtered and washed to obtain silica; specifically, the SiF-containing 4 The decomposed gas is introduced into the dust removal filter for dust removal, and after dust remo...

Embodiment 2

[0025] Embodiment 2 of the present invention provides a kind of method utilizing potassium feldspar to prepare potassium silicate, the method that this method embodiment 1 provides is basically the same, the difference is:

[0026] In the step of decomposing potassium feldspar, the mass ratio of potassium feldspar, ammonium fluoride, and 98% sulfuric acid is 1:1.5:1.8, and the reaction temperature is 190°C;

[0027] In the step of leaching the reaction residue, the leaching temperature is at 100°C, and the volume fraction of dilute sulfuric acid is 9%;

[0028] In the step of preparing potassium fluorosilicate, the excess of fluorosilicic acid is 60%.

Embodiment 3

[0030] Embodiment 3 of the present invention provides a kind of method utilizing potassium feldspar to prepare potassium silicate, the method that this method embodiment 1 provides is basically the same, the difference is:

[0031] In the step of decomposing potassium feldspar, the mass ratio of potassium feldspar, ammonium fluoride, and 98% sulfuric acid is 1:2.6:1.6, and the reaction temperature is 250°C;

[0032] In the step of leaching the reaction residue, the leaching temperature is at 110° C., and the volume fraction of dilute sulfuric acid is 10%;

[0033] In the step of preparing potassium fluorosilicate, the excess of fluorosilicic acid is 100%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method for preparing potassium silicate from potassium feldspar. According to the method, potassium feldspar decomposition residues and SiF4-containing decomposition gas are obtained through potassium feldspar decomposition; dust removal is performed on the SiF4-containing decomposition gas, then ethanol water is used for adsorption, and fluosilicic acid and silicon dioxide precipitate are obtained through filtering; a leaching solution is obtained through leaching of the decomposition residues; the leaching solution is subjected to cation adsorption, aluminum ions and iron ions in the leaching solution are removed, and a potassium sulfate solution is prepared; the fluosilicic acid is added to the potassium sulfate solution, and potassium fluosilicate is prepared; potassium fluosilicate is added to a hot potassium hydroxide solution for reaction, and a potassium silicate solution is obtained through purification; the potassium silicate solution is concentrated, and potassium silicate solids are obtained. Therefore, not only is potassium silicate prepared with the method, but also fluosilicic acid as a by-product is obtained, and effective ingredients of the potassium feldspar are used sufficiently.

Description

technical field [0001] The invention relates to a technology for comprehensive utilization of potassium feldspar decomposition, in particular to a method for preparing potassium silicate by decomposition of potassium feldspar. Background technique [0002] At present, the reserves of soluble potassium salt resources that have been identified in my country are not large, and it is difficult to meet the agricultural demand for potassium fertilizers. However, insoluble potassium salt rocks represented by potassium feldspar are almost distributed in most provinces and regions of my country, and their geological reserves are about Ten billion tons. Potassium feldspar mainly contains elements such as potassium, aluminum, silicon and oxygen, so that only HF can break the crystal lattice of potassium feldspar at room temperature, so the comprehensive utilization technology of potassium feldspar decomposition uses fluorine-containing additives to decompose potassium feldspar . With ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/32
Inventor 肖建军许道立刘改正张国峰
Owner LUOYANG LVREN ENVIRONMENTAL EQUIP