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Process for producing nano precipitated calcium carbonate

A nano-precipitation and calcium carbonate technology, applied in the direction of calcium carbonate/strontium/barium, chemical instruments and methods, calcium/strontium/barium compounds, etc., to achieve low residual moisture content and easy operation

Pending Publication Date: 2021-08-13
OMYA INT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if precipitated calcium carbonate is to be used as a filler or pigment in the paper, plastics, paint and coatings industries or in adhesives or sealants, it is often necessary to provide a further processing step of dewatering the suspension or slurry in order to Obtain dry precipitated calcium carbonate, as water often has a negative effect on such compositions

Method used

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  • Process for producing nano precipitated calcium carbonate
  • Process for producing nano precipitated calcium carbonate
  • Process for producing nano precipitated calcium carbonate

Examples

Experimental program
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Embodiment

[0278] 1. Measurement method

[0279] The following measurement methods were used to evaluate the parameters given in the examples and claims.

[0280] The BET specific surface area of ​​the material

[0281] Throughout this document, the specific surface area (measured as m 2 / g) is determined using the BET method (using nitrogen as adsorption gas), which is well known to those skilled in the art (ISO9277:2010). Then obtain the total surface area of ​​the mineral filler (calculated as m) by multiplying this specific surface area with the mass (calculated as g) of the mineral filler before treatment 2 ).

[0282] Total Moisture Measurement

[0283] The total moisture content of Nano-PCC was desorbed in an oven at 220 °C according to Karl Fischer coulometric titration and using dry N 2 It is measured by passing it continuously into a KF coulometer (Mettler Toledo Coulometric KFTitrator C30, combined with Mettler oven DO 0337) at 100 ml / min for 10 min. A calibration curve ...

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Abstract

The present invention refers to a process for producing nano precipitated calcium carbonate (nano-PCC), as well as to the nano precipitated calcium carbonate (nano-PCC) obtained by such a process and a system for producing the nano precipitated calcium carbonate (nano-PCC) comprising at least one dry mill, preferably a dry sandmill. Furthermore, the present invention refers to the use of the nano precipitated calcium carbonate (nano-PCC) as well as to the use of the inventive system for producing nano precipitated calcium carbonate (nano-PCC).

Description

technical field [0001] The present invention relates to a method for producing nano-precipitated calcium carbonate (nano-PCC), as well as nano-precipitated calcium carbonate (nano-PCC) obtained by such a method and a process comprising at least one dry mill (and preferably dry sand) mill) for the production of nano-precipitated calcium carbonate (nano-PCC). Furthermore, the present invention also relates to the use of the nano-precipitated calcium carbonate (nano-PCC) and the use of the system of the present invention for the production of the nano-precipitated calcium carbonate (nano-PCC). Background technique [0002] In recent years, calcium carbonate has been found to be very widely used in many fields. Calcium carbonate, for example, is one of the most widely used minerals in the paper, plastics, and paint and coatings industries, both as a filler and as a paint pigment for its white color. In the paper industry, calcium carbonate is valued for its high brightness, op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C09C1/02
CPCC01F11/181C01P2004/51C01P2004/62C01P2006/12C01P2006/60C01P2006/82C09C1/021C01P2004/03
Inventor L·佩德罗索H·施皮格尔M·斯科兹皮萨克
Owner OMYA INT AG