Method for producing potassium nitrate by utilizing potassium feldspar
A technology of potassium feldspar and potassium nitrate, applied in the field of producing potassium nitrate, which can solve the problems of cumbersome process, difficult economic benefits, and not involving the utilization of aluminum elements
Active Publication Date: 2015-11-25
LUOYANG FLUORIDE & POTASSIUM TECH
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] Patent Application No. 200710178440.6 discloses a method for producing agricultural mineral-based potassium nitrate by using potassium-rich rocks, but only as a mixture of agricultural fertilizers; Potassium nitrate process, but the process is cumbersome, does not involve the utilization of aluminum elements, and the utilization rate of fluorine is not high, so it is difficult to have good economic benefits
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0022] The technical solutions of the present invention will be described in further detail below through specific implementation methods.
[0023] Such as figure 1 Shown, a kind of method utilizing potassium feldspar to produce potassium nitrate, preparation process comprises the following steps:
[0024] Step 1: When the temperature of the converter reaches 250°C, mix 60Kg of potassium feldspar and NH 4 F (60-80) Kg is mixed evenly, and added to the converter silo in batches, and the mixing screw and star feeder are opened in turn to feed, potassium feldspar powder and NH 4 F reacts in the converter to form SiF 4 gas and containing Al 3+ 、K + and F - residue. Among them, before the reaction, potassium feldspar and NH 4 The mass ratio of F is 1:(1.1-1.2), the reaction temperature is 250°C-270°C, and the reaction time is 0.5 hours-4 hours. After half an hour of reaction, the discharge screw is turned on, and the reacted slag is discharged from the furnace tail.
[002...
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
| Property | Measurement | Unit |
|---|---|---|
| decomposition efficiency | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides a method for preparing potassium nitrate by use of potassium feldspar. According to the method, residue containing Al<3+>, K<+>, SO4<2-> and CaSO4 is generated through a reaction of the residue obtained by low-temperature decomposition of potassium feldspar and NH4F with fluorite and H2SO4; the decomposition rate of the potassium feldspar is greater than 95% for sure through the two-step reaction. The method comprises the following steps: leaching the residue containing Al<3+>, K<+>, SO4<2-> and CaSO4 to obtain leaching liquid containing K<+>, Al<3+> and SO4<2->; adding KOH into the obtained leaching liquid to obtain Al(OH)3 precipitate; filtering the precipitate to obtain a K2SO4 solution; adding Ca(NO3)2; boiling and filtering to obtain CaSO4 precipitate and a KNO3 solution; and concentrating and crystallizing to obtain the potassium nitrate. The process is simplified, and the production efficiency is high. The method for preparing the potassium nitrate by use of the potassium feldspar has the advantages of scientific design, high potassium feldspar decomposition rate, high production efficiency and good economic benefit of byproducts.
Description
technical field [0001] The invention relates to a method for preparing potassium nitrate, in particular to a method for preparing potassium nitrate by using potassium feldspar in industrial production. Background technique [0002] Potassium nitrate is widely used in the agricultural market. It belongs to potassium and nitrogen compound fertilizer. The total content of plant nutrients potassium and nitrogen can reach about 60%. Industrial potassium nitrate is also widely used in the synthesis of potassium salts and preparation of explosives, and is also widely used in food, ceramics and glass industries. Domestic production of potassium nitrate mainly uses potassium chloride, sodium nitrate and ammonium nitrate as raw materials, and its production processes include double decomposition method, ion exchange method, absorption method and so on. The production of potassium nitrate abroad mainly uses nitric acid and potassium chloride as raw materials. [0003] Patent Applicat...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C01D9/00
Inventor 李家朋余福元白灵卫石瑞彭宇任晓聪
Owner LUOYANG FLUORIDE & POTASSIUM TECH