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Sealed molten salt method used for changing surfaces of black tourmaline into red

A technology of black tourmaline and tourmaline, which is used in the field of chemistry and can solve problems such as limiting the scope of application

Inactive Publication Date: 2014-03-19
厦门山俊水杰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Black tourmaline is limited in scope of application because of its black color

Method used

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  • Sealed molten salt method used for changing surfaces of black tourmaline into red

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Experimental program
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Effect test

Embodiment 1

[0022] Combine processed massive tourmaline with LiCl-CaCl 2 Or LiCl-KCl binary solid solution phases are mixed evenly according to the volume ratio of 1:1.2; put it into a quartz tube, seal it, put it in the furnace, heat it to 700-800 ° C, keep it warm for 5 days, cool it, wash it, and get the lightness value Red Li-tourmaline with an L* of 21-30 and a "redness" degree of a* value of 2-11.

Embodiment 2

[0024] Combine lump tourmaline with appropriate amount of LiCl-CaCl 2 Or the LiCl-KCl binary solid solution phase is mixed evenly according to the volume ratio 1:1.2; put it into a quartz tube, seal it, put it in the furnace, heat it to 600-700°C, keep it for 15 days, cool it, wash it, and put it in the oven at 80°C Drying at a lower temperature gives red Li-tourmaline with a lightness value L* of 23-34 and a "reddening" degree a* value of 4-13.

Embodiment 3

[0026] Combine lump tourmaline with appropriate amount of LiCl-CaCl 2 Or LiCl-KCl binary solid solution phases are mixed evenly according to the volume ratio of 1:1.2; put it into a quartz tube, seal it, put it in a furnace, heat it to 650-750°C, keep it warm for 5 days, wash it, and dry it at 80°C , to obtain the red Li-tourmaline whose lightness value L* is 21-31, and the "redness" degree a* value is 3-11.

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Abstract

The invention discloses a sealed molten salt method used for changing surfaces of black tourmaline into red. According to the sealed molten salt method: processed tourmaline blocks with a certain shape are mixed with a binary solid solution containing LiCl so as to obtain a mixture, and the mixture is delivered into a sealed container; the obtained mixture is heated to 500 to 800 DEG C in an electric furnace, so that in the sealed container, the processed tourmaline blocks are reacted with the binary solid solution containing LiCl for a certain period of time via molten salt method; and obtained FeCl3 and the LiCl binary solid solution residual are cooled, washed with clean water, filtered and dried so as to obtain the tourmaline blocks with red surfaces and a certain shape. The sealed molten salt method comprises steps of mixing, sealing, performing of sealed molten salt method, washing, filtering, and drying. The sealed molten salt method is capable of changing the surfaces of black tourmaline into red effectively.

Description

technical field [0001] The invention relates to the field of chemistry, and in particular to a method of changing the surface of black tourmaline to red with a closed molten salt method. Background technique [0002] Tourmaline is a relatively common borosilicate mineral. There are abundant reserves in our country. Black tourmaline is limited in scope of application because of its black color. Most tourmalines in nature are black, and only a few tourmalines are colored. Among them, red tourmaline has the highest value, and black tourmaline has the lowest value. Therefore, a method has been developed to convert black tourmaline into black tourmaline. Changing the color to red tourmaline has a lot of room for appreciation. [0003] The chemical formula of tourmaline is XY 3 Z 6 Si 6 o 18 (BO 3 ) 3 W 4 , Tourmaline structure belongs to the trigonal crystal system. Among them, X represents a large cation, mainly composed of K, Ca, Na and other elements. Crystal struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/10
Inventor 王平方如意朱敏肖建香郭伟
Owner 厦门山俊水杰科技有限公司
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