Continuous production method of high-activity potassium fluoride
A technology of high-activity potassium fluoride and its production method, which is applied in the field of continuous production of high-activity potassium fluoride, can solve problems such as difficulty in guaranteeing purity and complex process of high-activity potassium fluoride, and improve accuracy and service life And operability, the effect of shortening the process process
Active Publication Date: 2018-02-23
ZHEJIANG UNIV OF TECH +1
View PDF7 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the process for preparing highly active potassium fluoride in this way is relatively complicated and its purity is difficult to guarantee.
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 1
[0034] (1) by the first metering pump 2 concentration is 30% potassium hydroxide solution in the amount of 2.5m / h, by the second metering pump 4 by the concentration of 40% hydrofluoric acid in the amount of 0.8m / h, Pass in the pipeline reactor 5 after filtering through the first pipeline filter 1 and the second pipeline filter 3 respectively;
[0035] (2) Potassium hydroxide and hydrofluoric acid react in the pipeline reactor 5 (the temperature is stabilized at 200°C after the reaction), and the potassium fluoride solution generated by the reaction is directly carried out in the spray dryer 10 to prepare high-activity potassium fluoride;
[0036] (3) The hot gas inside the spray dryer 10 comes from a gas-fired hot blast stove (550°C), the outlet air temperature is about 270°C, and the gas volume is about 7000Nm³ / h;
[0037] (4) At the same time, the pipeline behind the pipeline reactor 5 is provided with a bypass pipeline, and the opening of the control valve 12 on the ma...
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
Login to View More Abstract
The invention relates to a continuous production method of high-activity potassium fluoride. According to the method, potassium hydroxide and hydrofluoric acid are used as raw materials, and the raw materials are filtered, enter a pipeline reactor, are rapidly mixed in the reactor and then react to reach the reaction end point. The potassium fluoride solution generated by reaction is directly subjected to spray drying to prepare the high-activity potassium fluoride. The system is provided with a pH automatic monitoring control system. The pipeline behind the pipeline reactor is provided with abypass, and a metal oxide pH probe is arranged at the tail end of the bypass. A small part of the potassium fluoride solution generated by reaction flows to the bypass through a heat exchanger to becooled to 30-80 DEG C, the pH value is measured by the metal oxide pH probe, and the flow of potassium hydroxide is regulated by a control system, so that the pH of the reaction end point is stabilized at 7-8. Compared with a traditional neutralization method for preparing the high-activity potassium fluoride, the equipment cost is saved, the neutralization reaction heat is efficiently utilized toreduce the energy consumption, and the continuous production of the high-activity potassium fluoride is realized through the pH control in the production process of the high-activity potassium fluoride.
Description
technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a continuous production method of highly active potassium fluoride integrated with reaction and drying. Background technique [0002] Highly active potassium fluoride means that the specific surface area is higher than 1.3m 2 / g, a potassium fluoride solid powder product with a particle size of 1.0-15 μm and a water mass fraction of 0.05%-0.3%. [0003] Potassium fluoride is often used as a fluorinating agent in organic fluorination reactions. Generally, potassium fluoride has low solubility in organic compounds, so it often exists in the form of particles in organic fluorination reaction systems, which will greatly reduce the effect of fluorination reactions. The high specific surface area and low water content of highly active potassium fluoride greatly improve the fluorination yield of organic fluorination reactions. Example: It can increase the yield o...
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 IPC IPC(8): C01D3/02
CPCC01D3/02C01P2006/12Y02P20/10
Inventor 杨阿三钟繁超孙勤程榕郑燕萍李琰君贾继宁屠美玲
Owner ZHEJIANG UNIV OF TECH