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

A method for refining and purifying calcium formate

A calcium formate and organic solvent technology, applied in the field of calcium formate preparation, refining and purification of calcium formate, can solve the problems of residue, high energy consumption, affecting product purity, etc., and achieve high production efficiency, simple production process, and easy large-scale continuous. production effect

Active Publication Date: 2017-06-09
YUNNAN CHEM RES INST
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regardless of using the neutralization method to produce calcium formate or using CO and Ca(OH) 2 The method of direct carbonylation to synthesize calcium formate requires evaporation, concentration and crystallization to make the calcium formate solution into a calcium formate solid product. This process not only consumes a lot of energy, but also may leave other impurities in the solution in the calcium formate solid. , thus affecting the purity of the product
[0005] At present, there are more patents and literatures to report the technical method of preparing calcium formate, but do not see any report to record about the technical method of refining and purifying calcium formate solid product

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

[0026] Get the calcium formate solution 200g that concentration is 15%, at normal temperature, add acetone 200g wherein, after fully stirring and mixing 0.5 minute, then let it stand for precipitation for 1 minute, then use vacuum filtration to filter and separate the precipitated solid matter, in Dry the solid in an oven at 120°C for 60 minutes to obtain 21g of a white solid substance. After analysis and detection, the substance is calcium formate, and its calcium formate content is 99.95%. The appearance is white powdery crystals, and the heavy metal content (calculated as Pb) <0.002%, arsenic content <0.002%, water insoluble matter 0.01%, loss on drying 0.05%, PH value of 10% aqueous solution is 7.1, excellent product quality.

Embodiment 2

[0028] Get the calcium formate solution 1000g that concentration is 16%, at normal temperature, add ethanol 1000g wherein, after fully stirring and mixing for 0.5 minutes, then let stand for precipitation for 1 minute, then use vacuum filtration to filter and separate the precipitated solid matter, in The solid was dried in an oven at 120°C for 40 minutes to obtain 106.2 g of a white solid substance. After analysis and detection, the substance was calcium formate, and its calcium formate content was 99.90%. The appearance was white powdery crystals, and the heavy metal content (calculated as Pb ) <0.002%, arsenic content <0.002%, water insoluble matter 0.01%, loss on drying 0.03%, 10% aqueous solution pH value 7.2, excellent product quality.

Embodiment 3

[0030] Get the calcium formate solution 500g that concentration is 15%, at normal temperature, add methanol 250g wherein, after fully stirring and mixing for 1 minute, then let it stand for precipitation for 1 minute, then use vacuum filtration to separate the precipitated solid matter by filtration, in The solid was dried in an oven at 110°C for 60 minutes to obtain 18.3 g of a white solid substance. After analysis and detection, the substance was calcium formate, and its calcium formate content was 99.90%. The appearance was white powdery crystals, and the heavy metal content (calculated as Pb ) <0.002%, arsenic content <0.002%, water insoluble matter 0.02%, loss on drying 0.05%, PH value of 10% aqueous solution is 7.43, excellent product quality.

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 method for refining and purifying calcium formate. The method comprises the following steps: fully mixing a calcium formate solution with any concentration and a selected organic solvent at normal temperature and crystallizing; separating a separated-out calcium formate crystal by means of filtration; drying to obtain a high-purity calcium formate solid product. During production of calcium formate, the calcium formate product is always in a solution state; the solid product can be obtained only by evaporative crystallization; by adopting the method, the evaporative crystallization process can be saved; the calcium formate crystal can be obtained directly, so that the production process is simplified, the production efficiency is improved and the production energy consumption is reduced. The method can be used for producing food-grade and feed-grade high-purity calcium formate products and the like and also has the advantages of good product quality, simple production process, high production efficiency, low production energy consumption, easily-implemented continuous production and the like, so the method is a totally new calcium formate refining and purification technology.

Description

technical field [0001] The invention discloses a method for refining and purifying calcium formate, in particular to a method for refining and purifying calcium formate by using an organic solvent, and belongs to the field of inorganic chemical industry and the field of calcium formate preparation methods. Background technique [0002] Calcium formate, also known as calcium formate, is white or slightly yellow powder or crystal in appearance. Non-toxic, slightly bitter taste, insoluble in alcohol, soluble in water, neutral in aqueous solution. It is a widely used reagent newly developed at home and abroad. It can be used as an intermediate raw material for the preparation of oxalic acid, and can be used as feed, food industry additives, petroleum industry drilling aids, building material aids, etc. [0003] In recent years, calcium formate, as a new type of feed additive, can not only replace citric acid and fumaric acid as a sour agent, but also replace calcium propionate ...

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): C07C53/06C07C51/43
CPCC07C51/43C07C53/06
Inventor 马航张宗凡万邦隆杨东
Owner YUNNAN CHEM RES INST
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