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Use of 2-((1-methylpropyl)amino)ethanol as additive in aqueous suspensions of calcium carbonate-comprising materials

A technology of methyl propyl and water suspension, applied in the direction of adding inorganic compounds, adding non-polymer organic compounds, fibrous fillers, etc.

Active Publication Date: 2014-03-19
OMYA INT AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in order to use and utilize such a modulation system based on conductivity measurements, a person skilled in the art is challenged to select the desired additives for one or more functions that do not at the same time lead to a significant change in the conductivity value. sex change

Method used

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  • Use of 2-((1-methylpropyl)amino)ethanol as additive in aqueous suspensions of calcium carbonate-comprising materials
  • Use of 2-((1-methylpropyl)amino)ethanol as additive in aqueous suspensions of calcium carbonate-comprising materials
  • Use of 2-((1-methylpropyl)amino)ethanol as additive in aqueous suspensions of calcium carbonate-comprising materials

Examples

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Embodiment 1

[0079] The present embodiment uses the natural calcium carbonate of Norwegian marble source to carry out, and the natural calcium carbonate of described Norwegian marble source obtains through the following steps: first 10-300mm calcium carbonate rock is dried and ground independently to be equivalent to d 50 A fineness of 42-48 μm was then wetted in water in a 1.4-liter vertical bead mill (Dynomill) using 0.6-1 mm zirconium silicate beads (beads) with a weight solids content of 5-15% by weight. This dry ground product is milled until 95% by weight of the particles have a diameter 50 is 0.61 μm. During grinding, no dispersing or grinding aids are added.

[0080] The resulting suspension was then concentrated using a filter press to form a filter cake with a volume solids content of about 45% by volume. Then after adding 0.45% by weight based on the weight of solids, 50 mol% sodium-neutralized polyacrylic acid and 0.20% by weight of sodium bicarbonate, based on the weight of...

Embodiment 2

[0087] The present embodiment uses the natural calcium carbonate of Norwegian marble source to carry out, and the natural calcium carbonate of described Norwegian marble source obtains through the following steps: first 10-300mm calcium carbonate rock is dried and ground independently to be equivalent to d 50 The fineness of 42-48 μm was then wet milled in water using 0.6-1 mm zirconium silicate beads with a weight solids content of 77.5% by weight in a 1.4-liter vertical glass bead mill (Dynomill). Sodium and magnesium-neutralized polyacrylate (polyacrylate) to reach 0.65% by weight based on the equivalent dry weight of solid material Recirculated through the grinder until 90% by weight of the particles have a diameter 50 is 0.8 μm.

[0088]0.4 kg of this suspension was introduced into a 1-liter beaker with a diameter of 8 cm. A Pendraulik toothed plate stirrer was introduced into the beaker such that the stir plate was positioned approximately 1 cm above the bottom of th...

Embodiment 3

[0094] In this example, the pH of the calcium carbonate suspension was adjusted to a defined pH value using KOH solution and 2((1-methylpropyl)amino)ethanol, respectively.

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Abstract

Use of 2-((1-methylpropyl)amino)ethanol as an additive in an aqueous suspension, containing from 25 to 62 vol. % of at least one calcium carbonate-comprising material, wherein the use provides improved stability with regard to the conductivity of the suspension.

Description

technical field [0001] The present invention relates to the technical field of materials comprising calcium carbonate and aqueous suspensions to which additives are added. Background technique [0002] During the preparation of an aqueous suspension of calcium carbonate-containing material, it is often necessary for a person skilled in the art to select and introduce additives to adjust one or more properties of the suspension. [0003] In making the selection of such additives, the person skilled in the art must keep in mind that such additives should remain cost-effective and should not cause unwanted interactions or affect downstream during transport, processing and application of the suspension. [0004] Considered almost insoluble in the considerations of those skilled in the art, but the applicant has recognized the importance of choosing additives which do not lead to a significant change, ie increase in the electrical conductivity of the calcium carbonate containing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/02
CPCC01P2006/22C01P2004/62H01B1/12C09C1/021C01P2004/61C09C1/02D21H17/06D21H17/63
Inventor M·布里S·瑞恩特什P·A·C·甘恩
Owner OMYA INT AG