Preparation method of bunch-shaped calcium sulphate dihydrate

A calcium sulfate dihydrate, bouquet-like technology, applied in the direction of calcium/strontium/barium sulfate, etc., can solve the problems of gypsum microstructure change, affecting the performance of gypsum products, etc., and achieves convenient operation, high yield and simple synthesis route. Effect

Active Publication Date: 2014-07-16
BEIJING UNIV OF TECH
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different types of admixtures will cause changes in the microstruct

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
  • Preparation method of bunch-shaped calcium sulphate dihydrate
  • Preparation method of bunch-shaped calcium sulphate dihydrate
  • Preparation method of bunch-shaped calcium sulphate dihydrate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] Prepare a 0.2wt% sodium carboxymethyl cellulose (CMC) solution with 500 mL of deionized water, sonicate at 30°C and stir for 0.5 hours, add an equivalent concentration of 0.1M calcium chloride, and continue stirring at 30°C for 0.5 hours; Then add potassium aluminum sulfate dodecahydrate with an equivalent concentration of 0.05M into the calcium chloride solution with stirring, continue stirring at 30°C until precipitation appears, filter to obtain a calcium sulfate dihydrate filter cake; add ethanol and water to the calcium sulfate filter cake obtained Filter and rinse at room temperature, or filter the calcium sulfate filter cake obtained by drying at 60°C and then add ethanol and water to filter and rinse at room temperature; the washed calcium sulfate filter cake is dried at 50°C for 5 hours to obtain bouquet-like calcium sulfate dihydrate .

[0030] Measure and analyze the bouquet-like calcium sulfate dihydrate phase prepared above, and obtain the fo...

Example Embodiment

[0034] Example 2

[0035] Prepare a 0.4wt% sodium carboxymethylcellulose (CMC) solution with 1000 mL of deionized water, sonicate at 50°C and stir for 0.5 hours, add equivalent concentration of 0.3M calcium chloride, and continue stirring at 50°C for 0.5 hours; Add potassium aluminum sulfate dodecahydrate with an equivalent concentration of 0.15M to the calcium chloride solution with stirring, continue stirring at 50°C until precipitation appears, filter to obtain a calcium sulfate dihydrate filter cake; add ethanol and water to the calcium sulfate filter cake at room temperature After filtering and rinsing the calcium sulfate filter cake at 70°C, add ethanol and water to filter and rinse at room temperature; the washed calcium sulfate filter cake is dried at 80°C for 8 hours to obtain a bouquet of calcium sulfate dihydrate.

[0036] Measure and analyze the bouquet-like calcium sulfate dihydrate phase prepared above, and get similar figure 2 The scanning electron microscope photo ...

Example Embodiment

[0037] Example 3

[0038] Mix 5000mL deionized water into 0.5wt% sodium carboxymethylcellulose (CMC) solution, ultrasonic and stir at 80℃ for 0.5 hours, add equivalent concentration of 0.5M calcium chloride, and continue stirring at 80℃ for 0.5 hours; Add potassium aluminum sulfate dodecahydrate with an equivalent concentration of 0.25M into the calcium chloride solution with stirring, continue stirring at 80°C until precipitation appears, filter to obtain a calcium sulfate dihydrate filter cake; add ethanol and water to the calcium sulfate filter cake at room temperature After filtering and rinsing the calcium sulfate filter cake at 80°C, add ethanol and water to filter and rinse at room temperature; the washed calcium sulfate filter cake is dried at 60°C for 10 hours to obtain a bouquet of calcium sulfate dihydrate.

[0039] Measure and analyze the bouquet-like calcium sulfate dihydrate phase prepared above, and get similar figure 2 The scanning electron microscope photo shown i...

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 discloses a preparation method of bunch-shaped calcium sulphate dehydrate, belonging to the technical field of inorganic material preparation in material chemistry. The preparation method comprises the following steps of providing a calcium source by 0.1-0.5M of calcium chloride, and providing sulfate radicals by 0.05-0.25M of aluminum potassium sulfate; synthesizing in a low-concentration (0.1-0.5wt%) CMC (Carboxy Methylated Cellulose) water solution, reacting for 0.5h, washing at room temperature by taking ethanol and deionized water as leacheates, filtering, and drying at the temperature of 50-80 DEG C for 3-10h to obtain bunch-shaped calcium sulphate dehydrate. The method is low in selected raw material price, simple in synthesis route, convenient to operate and wide in application prospect.

Description

technical field [0001] The invention belongs to the technical field of material chemistry inorganic material preparation, and more specifically relates to a preparation method of bouquet-shaped calcium sulfate dihydrate. Background technique [0002] The structure and morphology control of crystals is full of challenges in crystal engineering research, and has always aroused widespread interest of scientists in different fields. [0003] Calcium sulfate dihydrate, also known as gypsum. As a mineral raw material with a long history, it has more and more broad development and application prospects in the fields of environment, sanitation, and construction because of its environmental friendliness, unique physical properties, and easy processing. In the past ten years, the research on gypsum at home and abroad has mainly focused on the crystal phase transformation and stabilization. The hydration process of building gypsum is controlled by doping metal inorganic salts, small i...

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): C01F11/46
Inventor 王金淑贾新建吴俊书杜玉成李洪义张晓菲
Owner BEIJING UNIV OF TECH
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