Preparation of high-purity potassium cyanate

A technology of potassium cyanate and purity, applied in the direction of cyanic acid/isocyanic acid, etc., can solve the problems of not meeting the requirements of foreign manufacturers, fewer manufacturers, low content of potassium cyanate, etc., and achieve the effect of simple and easy process

Inactive Publication Date: 2009-04-22
XUZHOU COLLEGE OF INDAL TECH
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is a large demand for potassium cyanate products in the international market. Potassium cyanate produced in my country is mainly used for export, and there a

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

[0014] Add 109.2 g of the solvent dimethyl sulfoxide into the three-necked bottle, start the electric stirrer, connect the electric heating mantle, adjust the voltage regulating transformer, heat the solvent to 130 ° C, and at the same time adjust the electric stirrer to stir, add 10 g of potassium carbonate, After being stabilized, add 15.6 g of urea, and keep the required reaction temperature during the reaction. Stop heating and stirring after 8 hours of reaction. Cool the material in the three-necked bottle to room temperature, vacuum filter, send it to a constant temperature drying oven at 105°C for half an hour, cool to room temperature in a desiccator, weigh the product quality, and obtain 10.5 grams of potassium cyanate, cyanide Potassium acid purity is 96.4%.

[0015] Put 10.5 grams of potassium cyanate into a beaker, add 42 grams of absolute ethanol, leave it for 4 hours after stirring, vacuum filter, send it to a constant temperature drying oven at 105 ° C for half...

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 discloses a method for preparing high-purity potassium cyanate, which belongs to preparation of the potassium cyanate. The method takes industrial urea and potassium carbonate as raw materials and dimethyl sulfoxide or dimethyl formamide as a solvent, and adopts proper technological conditions: the reaction temperature is 130 DEG C, the reaction time is 8 hours, the mol ratio of the urea to the potassium carbonate is 3.5 to 1, and the mass ratio of the solvent to the urea is 7 to 1; the product with 96 percent (mass fraction) of the potassium cyanate can be obtained, and the obtained potassium cyanate is washed by adopting anhydrous alcohol as a detergent, wherein the amount of the detergent is 3 to 4 times of the volume of the potassium cyanate; and the potassium cyanate after washing is dried, and the potassium cyanate with the purity of more than 98 percent (mass fraction) can be obtained. The method has the advantages that the technology is simple and easy and the purity of the prepared potassium cyanate is as high as more than 98 percent (mass fraction).

Description

technical field [0001] The invention relates to a preparation method of potassium cyanate, in particular to a preparation method of high-purity potassium cyanate. Background technique [0002] Potassium cyanate is widely used in preparation of hypnotics and anesthetics, as herbicides, defoliants and organic synthesis, in addition, it is also widely used in glass manufacturing, ceramic art, metal surface hardening treatment, fertilizers, insecticides, etc. field. [0003] The methods for synthesizing potassium cyanate include solid-state melting method, absorption method, liquid phase absorption method, liquid-solid phase reaction method, etc. Among them, the liquid-solid phase reaction method has easy-to-get raw material sources, easy operation, easy separation from solvents, and good economy characteristics, suitable for industrial production. [0004] In the liquid-solid phase reaction method, the invention of Takayama Yoshihiro and Takagi Kiyoshi of Nippon Chemical Corp...

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
IPC IPC(8): C01C3/14
Inventor 吴红
Owner XUZHOU COLLEGE OF INDAL TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap