A method for preparing ultrafine amorphous calcium carbonate in alcohol-water mixed system

A technology of amorphous calcium carbonate and calcium amino acid, applied in the direction of calcium carbonate/strontium/barium, nanotechnology for material and surface science, nanotechnology, etc. problems, to achieve the effect of a large range of controllable conditions, cheap and easy-to-obtain raw materials, and simple operation.

Active Publication Date: 2020-02-07
XIAMEN UNIV +1
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Serious overcapacity, mostly lime carbonization process, serious dust pollution, high carbon dioxide emissions, single variety
[0004] 2. Calcium carbonate has serious low-quality homogeneity, lack of high-quality calcium carbonate production technology, few varieties and specifications, low whiteness and fineness of products, and cannot meet high-quality requirements
[0005] 3. By-product resources such as carbide slag and calcium chloride of tens of millions of tons per year in my country have not been well utilized
Obviously, the environmental protection, economy and production efficiency of this process are all poor, and are not suitable as the production technology of amorphous calcium carbonate
[0021] At present, no one has developed an ultrafine amorphous calcium carbonate production process that can be stored stably

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
  • A method for preparing ultrafine amorphous calcium carbonate in alcohol-water mixed system
  • A method for preparing ultrafine amorphous calcium carbonate in alcohol-water mixed system
  • A method for preparing ultrafine amorphous calcium carbonate in alcohol-water mixed system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Embodiment 1: Using calcium glycinate as raw material, the volume ratio of ethanol and calcium solution is 3: 1, and the molar ratio of calcium ion and magnesium ion is 5: 1 to prepare amorphous calcium carbonate

[0059] Measure 30mL of absolute ethanol in a three-necked flask, then add 10mL of 1mol / L calcium glycinate solution to the flask, and add 2mL of 1mol / L MgCl to the solution 2 solution, so that the molar ratio of calcium ions and magnesium ions in the solution is 5:1, after stirring evenly, introduce CO 2 , until the pH value of the solution was 7.5, stop feeding CO 2 . Immediately suction-filter the obtained calcium carbonate slurry, wash with absolute ethanol or alcohol-water mixture, and dry the obtained calcium carbonate in a vacuum oven at 60° C. for 24 hours to obtain 0.96 g of calcium carbonate product. The purity of the obtained product is 97.9%, and the yield is 96%.

[0060] The products obtained after the reaction were characterized by X-ray diff...

Embodiment 2

[0061] Embodiment 2: Using calcium glycinate as raw material, different volume ratios of ethanol and calcium solutions, and the molar ratio of calcium ions and magnesium ions to prepare amorphous calcium carbonate under the conditions of 5:1

[0062] Measure 30mL of absolute ethanol in five three-necked flasks, and then add 5mL, 10mL, 15mL, 30mL, and 60mL of 1mol / L calcium glycinate solutions into the flasks, and the numbers are 1, 2, 3, and 4 respectively. , 5. Add 1mL, 2mL, 3mL, 6mL, 12mL of 1mol / L MgCl to the 5 solutions 2 solution, so that the molar ratio of calcium ions and magnesium ions in the solution is 5:1. After stirring evenly, inject CO 2 , until the pH value of the solution was 8, stop feeding CO 2 . Suction filter the obtained calcium carbonate slurry immediately, wash with absolute ethanol or alcohol-water mixture, and dry the obtained calcium carbonate in a vacuum oven at 60° C. for 24 hours to obtain the product.

[0063] The products obtained after the ...

Embodiment 3

[0064] Embodiment 3: Taking calcium glycinate as raw material, ethanol and calcium solution volume ratio is 3: 1, calcium ion and ion molar ratio is 5: 1, prepares amorphous calcium carbonate under the condition of different aging time

[0065] Use a 50mL graduated cylinder to measure 30mL of absolute ethanol in a three-necked flask, then add 10mL of 1mol / L calcium glycinate solution to the flask, and then add 2mL of 1mol / L MgCl to the solution 2 solution, so that the molar ratio of calcium ions and magnesium ions in the solution is 5:1. Stir and pass CO directly 2 , until the pH value of the solution was 8, stop feeding CO 2 . Sampling was carried out when the aging time was 0h, 1h, 2h, 3h, and 4h, and the obtained calcium carbonate slurry was suction-filtered, washed with absolute ethanol or a mixture of alcohol and water, and the obtained calcium carbonate was stored in a vacuum oven at 60°C. Dry in medium for 24h to get the product.

[0066] The products obtained after...

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
diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a novel technology for large-scale, simple and economical production of ultra-micro amorphous calcium carbonate in an alcohol-water system. The invention provides a common novel technological method for rapidly preparing the amorphous calcium carbonate in an alcohol-water system by taking carbide slag, calcium hydroxide and calcium chloride as calcium sources. According tothe method provided by the invention, the difficulties of industrial synthesis and stable preservation of the amorphous ultra-micro calcium carbonate are overcome very well and industrial wastes including the carbide slag, the calcium chloride, flue gas and the like are utilized very well. The novel technology provided by the invention has remarkable environment, economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of raw material production. Specifically, the invention relates to a method for large-scale, simple and economical production of ultrafine amorphous calcium carbonate in an alcohol-water system. Background technique [0002] Calcium carbonate is an inorganic powder material widely used in papermaking, plastics, rubber, building materials, daily chemicals and other industries, and its usage and application fields are still increasing. In 2011, the world's calcium carbonate production was 70 million tons, and China's output was 7 million tons. By 2015, China's total calcium carbonate production had reached 12 million tons. However, the fast-growing calcium carbonate industry in my country still has the following problems: [0003] 1. The production capacity is seriously overcapacitated, and the lime carbonization process is mostly used, resulting in serious dust pollution, high carbon dioxide emissions, and ...

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): C01F11/18B82Y30/00
CPCC01F11/18C01P2002/02C01P2002/72C01P2004/03C01P2004/64C01P2006/80
Inventor 尹应武孔祥波孙瑞任毅华吐松叶李艺
Owner XIAMEN UNIV
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