Preparation method of high-purity and high-density lithium tetraborate

A lithium tetraborate, high-density technology, applied in the direction of borates, boron oxides, etc., can solve the problems of expensive equipment, demanding process conditions, long process flow, etc., achieving convenient and simple operation, no environmental pollution, and simplified process. Effect

Active Publication Date: 2012-12-26
HUBEI BAIJIERUI ADVANCED MATERIALS
View PDF1 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lithium tetraborate was produced as early as the beginning of the 20th century. However, due to the weak application of chemical technology at that time, lithium tetraborate was not widely used in various industries. It was not until the 1980s that it was gradually applied to the glaze of the enamel industry. In the later period, with the promotion of material chemistry, lithium tetraborate was gradually applied to buffers and preservatives, and was also used in the development of new materials. Until the 21st century, with the innovation of iron and steel smelting technology, four Lithium borate is used in wavelength dispersive XRF fluorescence spectrometer, AA atomic absorption and ICP to detect steel components, which officially announces the arrival of lithium tetraborate in the new year, but with the continuous advancemen

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 1

[0029] A preparation method of high-purity high-density lithium tetraborate, the steps are as follows:

[0030] A. Purification of lithium hydroxide: Dissolve the raw material industrial grade lithium hydroxide monohydrate in pure water with a solid-to-liquid mass ratio of 1:5; :0.54 mixed) and filtered to remove insoluble matter; the filtrate was evaporated and concentrated to visible crystals; after cooling to room temperature, it was centrifuged to obtain recrystallized lithium hydroxide monohydrate;

[0031] The substance amount of ethylenediaminetetraacetic acid in the impurity-removing reagent is twice the total substance amount of impurity metals Ca, Mg, Fe, and Pb in the raw material industrial grade lithium hydroxide monohydrate;

[0032] B. Neutralization ingredients: Take 6Kg of recrystallized lithium hydroxide monohydrate and dissolve it with boiled pure water at a solid-to-liquid mass ratio of 1:2 until no obvious solid precipitation is observed. Slowly add boric ...

Embodiment 2

[0042] A preparation method of high-purity high-density lithium tetraborate, the steps are as follows:

[0043] A. Purification of lithium hydroxide: dissolve raw material industrial grade lithium hydroxide monohydrate in pure water with a solid-to-liquid mass ratio of 1:5; : 0.54 mixed) and filtered to remove insolubles; filtrate evaporated and concentrated to visible crystals; cooled to room temperature and centrifuged to obtain recrystallized lithium hydroxide monohydrate;

[0044] The substance amount of ethylenediaminetetraacetic acid in the impurity-removing reagent is twice the total substance amount of impurity metals Ca, Mg, Fe, and Pb in the raw material industrial grade lithium hydroxide monohydrate;

[0045]B. Neutralization ingredients: Take 6Kg of recrystallized lithium hydroxide monohydrate and dissolve it with boiled pure water at a solid-to-liquid mass ratio of 1:2 until no obvious solid precipitation is observed. Slowly add boric acid (110% of the stoichiomet...

Embodiment 3

[0055] A preparation method of high-purity high-density lithium tetraborate, the steps are as follows:

[0056] A. Purification of lithium hydroxide: dissolve raw material industrial grade lithium hydroxide monohydrate in pure water with a solid-to-liquid mass ratio of 1:5; : 0.54 mixed) and filtered to remove insolubles; filtrate evaporated and concentrated to visible crystals; cooled to room temperature and centrifuged to obtain recrystallized lithium hydroxide monohydrate;

[0057] The substance amount of ethylenediaminetetraacetic acid in the impurity-removing reagent is twice the total substance amount of impurity metals Ca, Mg, Fe, and Pb in the raw material industrial grade lithium hydroxide monohydrate;

[0058] B. Neutralization ingredients: Take 6Kg of recrystallized lithium hydroxide monohydrate and dissolve it with boiled pure water at a solid-to-liquid mass ratio of 1:2 until no obvious solid precipitation is observed. Slowly add boric acid (120% of the stoichiome...

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

PropertyMeasurementUnit
Melting temperatureaaaaaaaaaa
Melting temperatureaaaaaaaaaa
Melting temperatureaaaaaaaaaa
Login to view more

Abstract

The invention relates to the technical field of preparation of lithium tetraborate, and particularly discloses a preparation method of high-purity and high-density lithium tetraborate. The preparation method comprises the following steps of: carrying out purification on industrial-grade lithium hydroxide by the steps of low-temperature dissolving, filtering, evaporative concentration, cooling crystallization, centrifugal separation and the like; dissolving the purified lithium hydroxide in boiled pure water according to the mass ratio 1:2 of solid and liquid; and according to the content of the lithium hydroxide in the solution, adding the lithium hydroxide into industrial-grade boric acid for neutral reaction according to the rate 105%-120% of stoichiometric numbers in reaction, and then preparing the high-purity and high-density lithium tetraborate by the processes of evaporative concentration, primary drying, crushing, secondary drying, high-temperature melting, water-quenching and cooling and the like. The prepared lithium tetraborate is about 1.4g/cm<3> in crystal density, and is more suitable for the current market demand.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium tetraborate, in particular to a preparation method of high-purity and high-density lithium tetraborate. Background technique [0002] Lithium tetraborate, also known as lithium pyroborate, has a molecular formula of Li 2 B 4 o 7 , the molecular weight is 169.12. High-purity, high-density lithium tetraborate is a new type of temperature-compensated surface wave substrate chip and piezoelectric single crystal substrate material. , satellite communications, national defense technology and many other fields have extensive and important applications. Lithium tetraborate was produced as early as the beginning of the 20th century. However, due to the weak application of chemical technology at that time, lithium tetraborate was not widely used in various industries. It was not until the 1980s that it was gradually applied to the glaze of the enamel industry. In the later period, with t...

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): C01B35/12
Inventor 纪东海范黎罗钊李兴
Owner HUBEI BAIJIERUI ADVANCED MATERIALS
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