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

Method for preparing 4A zeolite by using fluorine-containing white residues through single-step crystallization

A technology of fluorine-containing silicon slag and crystallization, which is applied to the removal of crystalline aluminosilicate zeolite, A-type crystalline aluminosilicate zeolite, solid waste, etc., can solve the problem of less comprehensive utilization of fluorine-containing silicon slag, and achieve a large The effect of social environmental economic benefits, reduction of production costs, and saving of grinding costs

Inactive Publication Date: 2015-01-21
CENT SOUTH UNIV +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there are few studies on the comprehensive utilization of fluorine-containing silicon slag, and how to improve the overall utilization rate of fluorine-containing silicon slag as a silicon-aluminum mineral remains to be further resolved

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 4A zeolite by using fluorine-containing white residues through single-step crystallization
  • Method for preparing 4A zeolite by using fluorine-containing white residues through single-step crystallization
  • Method for preparing 4A zeolite by using fluorine-containing white residues through single-step crystallization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1: take by weighing 50g fluorine-containing silicon slag, calculate silicon, aluminum molar weight wherein, according to the ratio n(SiO 2 ): n(Al 2 o 3 )=1.8:1, n(Na 2 O): n(SiO 2 )=1.2:1, n(H 2 O): n(Na 2 O)=35, weigh Al(OH) 3 Put NaOH in a beaker, add deionized water, control the temperature and stir to make it fully react to form a sodium metaaluminate solution; then weigh NaOH, add deionized water to prepare a solution. Put fluorosilicon slag, sodium metaaluminate and NaOH solution into a reaction kettle with a stirring device, stir well to make the mixture uniform, and add a zeolite crystallization directing agent accounting for 1.5% of the volume ratio of the reaction system at the same time. The directing agent is the raw material material The ratio of the amount of 3Na 2 O·Al 2 o 3 2SiO2 2 ·85H 2 O's sol system. The reaction kettle was placed in an electrothermal constant temperature device, the stirring speed was controlled at 240r / min, ...

Embodiment 2

[0040] Embodiment 2: take by weighing 100g fluorine-containing silicon slag, calculate silicon, aluminum molar weight wherein, according to the ratio n(SiO 2 ): n(Al 2 o 3 )=1.9:1, n(Na 2 O): n(SiO 2 )=1.0: 1, n(H 2 O): n(Na 2 O)=40:1, weigh sodium metaaluminate in a beaker, and add deionized water to make sodium metaaluminate solution; then weigh NaOH, add deionized water to prepare a solution. Put fluorosilicon slag, sodium metaaluminate solution and NaOH solution into a reaction kettle with a stirring device, stir well to make the mixture uniform, and add a zeolite crystallization directing agent accounting for 1.0% of the volume ratio of the reaction system at the same time (same as Example 1) , put the reaction kettle in an electric heating constant temperature device, stir while maintaining a constant temperature, and react under the conditions of a crystallization temperature of 85°C, a crystallization time of 3h, and a stirring speed of 250r / min. After the crysta...

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
whitenessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for preparing 4A zeolite by using fluorine-containing white residues through single-step crystallization. The method comprises the following specific steps of: simultaneously adding a sodium metaaluminate solution, a NaOH solution and a 4A zeolite crystallization guiding agent to the fluorine-containing white residues generated in a fluorine salt production process of aluminum and fluoride chemical industries according to a certain proportion, uniformly mixing in a reaction kettle, carrying out constant temperature crystallization for 3.0-3.5 hours at 75-85 DEG C and a stirring rate of 240-300r / min, ageing for 12-14 hours, filtering, washing and drying to obtain the 4A zeolite which is used for washing and is in line with the QB / I1768-2003 standard. The method has the technical characteristics that technological process is short, synthetic conditions are mild, the product quality is stable, and the problems of comprehensive utilization of the fluorine-containing white residues and secondary pollution of the fluorine-containing white residues to environments are successfully solved.

Description

technical field [0001] The invention belongs to the field of resource utilization of solid waste, and relates to a method for preparing 4A zeolite from fluorine-containing silicon slag, a chemical industry by-product. Background technique [0002] At present, my country has formed an annual output of about 40 million tons of P 2 o 5 The production capacity of wet-process phosphoric acid, accompanied by an annual output of about 2 million tons of by-product fluosilicic acid, the direct method of fluosilicic acid production of cryolite and co-production of aluminum fluoride and sodium fluoride technology will completely deal with the pollution of fluosilicic acid and control the environment , Recycling resources is of great significance. However, in the process of producing these fluoride salts, a large amount of silicon slag containing fluorine and aluminum elements will be produced, and the annual production volume exceeds 100,000 tons. Fluorine-containing silicon slag no...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C01B39/14B09B3/00
Inventor 肖细元曹霞郭朝晖刘东晓廖志辉
Owner CENT SOUTH UNIV
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