Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing phosphorite crystal whisker using natural phosphorite as raw material

A technology of apatite whisker and phosphorite, which is applied in the fields of chemistry and materials, can solve the problems of high requirements, complex process, high energy consumption, etc., and achieve the effect of large average length-to-diameter ratio and cost reduction

Inactive Publication Date: 2009-10-07
WUHAN INSTITUTE OF TECHNOLOGY
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a method for preparing apatite whiskers using natural phosphorite as a raw material for the above-mentioned prior art, which solves the problem of high temperature and pressure requirements in the current apatite whisker production process. Large energy consumption, complex process and other issues

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing phosphorite crystal whisker using natural phosphorite as raw material
  • Method for preparing phosphorite crystal whisker using natural phosphorite as raw material
  • Method for preparing phosphorite crystal whisker using natural phosphorite as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] First select the natural phosphorite, whose grade is above 17%, add nitric acid to adjust the pH value to dissolve (based on the dissolved ionic state of phosphorus and calcium), filter to remove insoluble impurities (mainly quartz, clay, feldspar) , add urea and composite templating agent to the filtrate, and its raw material ratio is [PO 4 ] 3- : Ca 2+ : urea: composite template agent=0.3mol: 0.18mol: 0.25mol: 0.48g, the composite template agent is made up of 0.28g sorbitol and 0.20g glucose, puts into the autoclave, adjusts the pH value of the solution with acid (to just do not produce precipitation prevail) to make a homogeneous system, and then heated in the temperature range of 90 ° C ~ 100 ° C, the urea hydrolyzed slowly to release hydroxyl groups and carbonate groups, and at the same time released a large number of bubbles. After reaching supersaturation, homogeneous precipitation began to occur. , stop heating, stand and age for 12h, wash with water and ethan...

Embodiment 2

[0024] First select the natural phosphorite, whose grade is above 25%, add nitric acid to adjust the pH value to dissolve (based on the dissolved ionic state of phosphorus and calcium), and filter to remove insoluble impurities (mainly quartz, clay, feldspar) , add urea and composite templating agent to the filtrate, and its raw material ratio is [PO 4 ] 3- : Ca 2+ : urea: composite template agent=0.3mol: 0.18mol: 0.25mol: 0.55g, the composite template agent is made up of 0.35g sorbitol and 0.20g glucose, puts into the autoclave, adjusts the pH value of the solution with acid (to just do not produce precipitation prevail) to make a homogeneous system, and then heated in the temperature range of 90 ° C ~ 100 ° C, the urea hydrolyzed slowly to release hydroxyl groups and carbonate groups, and at the same time released a large number of bubbles. After reaching supersaturation, homogeneous precipitation began to occur. , stop heating, stand and age for 12 hours, wash with water ...

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 relates to a method for preparing phosphorite crystal whisker using natural phosphorite as raw material, comprising the following steps: 1) choosing natural phosphorite, souring until phosphorus and calcium being fully dissolved, then filtering to gain soluble ion O4]3- and Ca2+; 2) adding urea and composite template into the solution, and putting into high pressure autoclave to produce homogeneous system, then heating at the temperature ranging from 90 to 100 DEG C, releasing hydroxyl group and carbonate after hydrolyzing urea slowly, and after saturation, precipitating phosphorite. The beneficial effects of the invention: 1) the invention directly uses natural phosphorite as raw material, instead of industrial chemical, controls temperature and reduces the cost; 2) novel composite template is adopted to enable phosphorite to grow in control in one dimension along c axis, therefore the product has big even slenderness ratio and width micron size.

Description

technical field [0001] The invention relates to the fields of chemistry and materials, in particular to a method for preparing apatite whiskers by using natural phosphorite as a raw material. Background technique [0002] At present, the preparation methods of inorganic whiskers at home and abroad generally include: ① VLS method: the temperature is 1400 °C when the whiskers are formed; ② casting-in-situ reaction method: the temperature is 900 °C when the whiskers are formed; Ultrafine powder and nano-scale powder are used as raw materials, and an appropriate amount of catalyst is introduced to grow whiskers at 1500°C; ④ Glass crystallization method: prepare whiskers at 1200°C; ⑤ Hydrothermal crystallization method: first make a sol , then add mineralizer, hydrothermal crystallization in an autoclave, and then high-temperature calcination; ⑥SOL-GEL method: use metal alkoxide hydrolysis, and then high-temperature calcination, ⑦Two-step temperature-controlled template induction...

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): C30B29/14C30B7/10C30B29/62
Inventor 黄志良李剑秋程晓焜池汝安王涵喻俊孙念袁雯娟
Owner WUHAN INSTITUTE OF TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com