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Preparation method of beta eucryptite

A technology of eucryptite and lithium carbonate, which is applied in the field of nepheline preparation, can solve the problems of poor chemical uniformity, high reaction temperature and complicated operation of β-eucryptite, and achieves convenience for large-scale production, simple preparation process and high purity high effect

Inactive Publication Date: 2008-02-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the β-eucryptite prepared by the existing β-eucryptite preparation method has poor chemical uniformity, many by-products, low purity, high reaction temperature, high energy consumption, high cost, complicated operation and long time consumption. defects, and a preparation method of β-eucryptite is provided

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  • Preparation method of beta eucryptite

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specific Embodiment approach 1

[0006] Specific embodiment one: present embodiment β-eucryptite is prepared according to the following steps: (1) take lithium carbonate, nano-silicon oxide and nano-aluminum hydroxide, or nano-alumina by weighing 1 mol lithium: 1 mol aluminum: 1 mol silicon ratio (2) lithium carbonate is completely dissolved in the organic acid solution, and the quantity of hydrogen ions in the solution is more than the quantity of lithium ions; (3) nano-silicon oxide and nano-aluminum hydroxide, or nano-alumina are put into the solution of step 2 (4) drying the jelly to remove moisture; (5) burning the jelly at 1050-1400°C for 1-6 hours after drying to obtain β-euxia stone.

[0007] In this embodiment, nano-silicon oxide and nano-aluminum hydroxide, or nano-alumina are selected to increase the mixing uniformity of the reactants.

specific Embodiment approach 2

[0008] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the organic acid solution is formic acid solution, acetic acid solution, propionic acid solution, butyric acid solution, pentanoic acid solution, hexanoic acid solution, heptanoic acid solution in the step (two). Acid solution, octanoic acid solution, nonanoic acid solution, capric acid solution, oxalic acid solution, malonic acid solution, succinic acid solution, stearic acid solution, tartaric acid solution, citric acid solution, salicylic acid solution, lactic acid solution and acrylic acid solution one or a mixture of several. Other steps are the same as those in Embodiment 1.

specific Embodiment approach 3

[0009] Embodiment 3: The difference between this embodiment and Embodiment 1 is: in step (4), the jelly is dried in an environment of 100-400° C. for 0.001-5 hours. Other steps are the same as those in Embodiment 1.

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Abstract

A process for preparing beta-eucryptite includes such steps as proportionally providing lithium carbonate, nano-silicon oxide and nano-aluminum hydroxide (or oxide), dissolving lithium carbonate in the solution of organic acid, putting another two in it, drying and calcining. Its advantages are high purity, low cost and no pollution.

Description

technical field [0001] The invention relates to a preparation method of nepheline. Background technique [0002] β-eucryptite is one of the few substances with a large negative expansion coefficient. It will emit bright magenta fluorescence under short-wave ultraviolet radiation. It has one-dimensional superionic conductivity, sensitivity to air humidity, and excellent thermal stability. And thermal shock resistance, so it is widely used in the manufacture of high-precision parts of aircraft, metal matrix composite materials, sensitive materials for humidity sensors, solid electrolytes for lithium-ion batteries, etc. Because the amount of β-eucryptite deposits in nature is small and the output is low; therefore, artificial synthesis methods are needed to meet the market demand. However, there are many defects in the existing artificial synthesis methods, such as: the β-eucryptite produced by the solid-state reaction method has poor chemical uniformity, many by-products, hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/20
Inventor 王黎东费维栋俞华
Owner HARBIN INST OF TECH