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Prepn and use of potassium fluorocarbonate

A technology of potassium carbonate and carbonate, applied in the direction of carbonate preparations, etc., can solve the problems of unfavorable environmental protection, waste of carbon dioxide, incomplete reaction of bottom raw materials, etc., and achieve the effect of low cost, complete reaction of raw materials, and easy promotion

Inactive Publication Date: 2007-06-06
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Document 3 and Document 4, the method of solid-phase synthesis under the flowing atmosphere of carbon dioxide was used to synthesize this type of fluorocarbonate. Although the reaction conditions are relatively simple compared with the hydrothermal method, and the decomposition of carbonate during the reaction process can be inhibited, However, on the one hand, this method leads to incomplete reaction of the bottom raw materials, and on the other hand, it causes waste of carbon dioxide, which is not conducive to environmental protection.

Method used

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  • Prepn and use of potassium fluorocarbonate
  • Prepn and use of potassium fluorocarbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Take by weighing 0.15 mol of potassium fluoride with a purity of 99.9% and 0.1 mol of calcium carbonate with a purity of 99.9% and grind them in an agate mortar and mix them evenly; put the powder into an iron crucible with a diameter of 90 mm, a height of 180 mm, and a thickness of 10 mm. Put the crucible into the vacuum electromagnetic induction furnace and connect the vacuum system to evacuate to 10 -4 Pa, and then filled with carbon dioxide atmosphere. Under the condition that the pressure of carbon dioxide is 1.2 atmospheres, the rate of 8°C / min is raised from room temperature to 500°C, kept for 10 hours, the power is turned off, and the white target product KCaCO is synthesized. 3 F powder.

Embodiment 2

[0021] Take by weighing 0.15 mol of potassium fluoride with a purity of 99.9% and 0.1 mol of strontium carbonate with a purity of 99.9%, grind and mix them uniformly in an agate mortar, put the powder into a platinum crucible with a diameter of 90 mm, a height of 180 mm, and a thickness of 10 mm. Put it into a vacuum electromagnetic induction furnace and connect it to a vacuum system to evacuate to 10 -4 Pa, and then filled with carbon dioxide atmosphere. Under the condition of carbon dioxide pressure of 1.4 atmospheres, the rate of 8°C / min was raised from room temperature to 500°C, kept for 20 hours, turned off the power, cooled with the furnace, and synthesized to obtain the white target product KSrCO 3 Powder of F.

Embodiment 3

[0023] Take by weighing 0.12mol of potassium fluoride with a purity of 99.9% and 0.1mol of calcium carbonate with a purity of 99.9% and grind and mix them uniformly in an agate mortar, put the powder into a tungsten crucible with a diameter of 90mm, a height of 180mm, and a thickness of 10mm. The crucible is loaded into a vacuum electromagnetic induction furnace and connected to a vacuum system to evacuate to 10 -4 Pa, and then filled with carbon dioxide atmosphere. Under the condition of carbon dioxide pressure of 1.3 atmospheres, the rate of 8°C / min was raised from room temperature to 800°C, kept for 20 hours, turned off the power, cooled with the furnace, and synthesized to obtain the white target product KCaCO 3 Powder of F.

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Abstract

The present invention discloses the preparation process and use of potassium fluorocarbonate. The preparation process includes the following steps: setting the mixture of potassium fluoride and alkali metal carbonate in the molar ratio of 1-1.5 into one reaction container, setting the reaction container in sealed environment filled with CO2 at 1.2-1.4 atm. and heating the reaction container to 500-800 deg.c, maintaining for 10-24 hr and cooling naturally to obtain the product potassium fluorocarbonate. The present invention synthesizes potassium fluorocarbonate with potassium fluoride and alkali metal carbonate, and has low cost, high product purity and other advantages.

Description

technical field [0001] The present invention relates to a preparation method and application of potassium fluorocarbonate, in particular to a method for synthesizing fluorocarbonate KCaCO by chemical reaction of alkali metal fluoride and alkaline earth metal carbonate 3 F and KSrCO 3 The method of F and its use. Background technique [0002] Frequency conversion of light waves is an important nonlinear optical effect. For example, a beam of fundamental-frequency light waves with frequency ω passes through a nonlinear optical crystal to generate a double-frequency light wave with frequency 2ω, which is called the frequency-doubling effect. The polarizability of carbonate ion and fluoride ion in fluorocarbonate is very different, among which the polarizability of carbonate ion is very large and presents anisotropy, such as in calcium carbonate α / / =3.18×10 -24 cm 3 alpha  =3.18×10 -24 cm 3 , refer to literature 1: Kinase, W.; Tanaka, M.; Nomura, H.J.Phys.Coc.Japan 47...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G1/00C01D7/04
Inventor 孙玉平陈小龙许燕萍王皖燕
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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