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Calcium carbonate powder composition and preparation method thereof

A technology of calcium carbonate powder and composition, applied in the field of calcium carbonate powder composition and preparation thereof, and can solve problems such as coarseness

Inactive Publication Date: 2012-02-22
UBE CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, the calcium carbonate powder that above-mentioned preparation method obtains, its tiny primary particle gathers with relatively strong cohesive force, easily forms coarse porous calcium carbonate particle (secondary particle), if such calcium carbonate powder is used when making beverage It is difficult for the stirring device to disperse into the beverage in the form of primary particles or similar particles

Method used

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  • Calcium carbonate powder composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 4m3 of calcium hydroxide aqueous dispersion (milk of slaked lime) with a solid content concentration of 7.4% by mass were stirred at a liquid temperature of 10°C while stirring at a temperature of 1300m 3 The flow rate of / hour introduces the furnace gas that carbon dioxide gas concentration is 26 mass % wherein, introduces 1.5 hours, obtains the calcium carbonate aqueous dispersion liquid that solid content concentration is 10 mass %. The calcium carbonate aqueous dispersion was dehydrated with a rotary filter press to obtain a calcium carbonate dehydrated filter cake with a solid content concentration of 21% by mass. Get a part of this calcium carbonate dehydration filter cake, dry, measure the BET specific surface area of ​​gained calcium carbonate powder, be 33m 2 / g.

[0040]The rest of the calcium carbonate dehydrated filter cake and an emulsifier aqueous solution (emulsifier: a mixture of sucrose fatty acid ester and glycerin fatty acid ester, リヨ-トシュガ-エステルSEM-7...

Embodiment 2

[0043] Change the pressure of the aqueous dispersion jet stream into 200MPa during the impact collision dispersion treatment, except that, carry out the impact collision dispersion treatment in the same manner as in Example 1, dry with a spray drier, and prepare a calcium carbonate powder composition.

[0044] The BET specific surface area, total micropore volume and emulsifier content were measured for the obtained calcium carbonate powder composition by the above-mentioned method. As a result, the BET specific surface area is 20m 2 / g, the total pore volume was 0.18mL / g, and the emulsifier content was 11.9% by mass.

Embodiment 3

[0046] The mixing ratio of the emulsifier aqueous solution is such that the concentration of the emulsifier is 1.5% by mass relative to the total amount (about 9.1% by mass relative to the total amount of calcium carbonate powder and emulsifier), and the concentration of the aqueous dispersion jet during the impact collision dispersion process is 1.5% by mass. The pressure was 200MPa, and the impact collision dispersion treatment was performed in the same manner as in Example 1, and dried with a spray dryer to prepare a calcium carbonate powder composition.

[0047] The BET specific surface area, total micropore volume and emulsifier content were measured for the obtained calcium carbonate powder composition by the above-mentioned method. As a result, the BET specific surface area is 22m 2 / g, the total pore volume was 0.16 mL / g, and the emulsifier content was 9.2% by mass.

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Abstract

The present invention provides a calcium carbonate powder composition capable of stably dispersing calcium carbonate in a liquid for a long time in the form of primary particles or particles similar thereto. The powder composition is a calcium carbonate primary particle aggregate whose BET specific surface area is in the range of 10-40m2 / g and the total micropore volume is in the range of 0.10-0.28mL / g, containing porous calcium carbonate particles, and the surface of the porous calcium carbonate particles It is covered with an emulsifier whose content rate is in the range of 3 to 20% by mass relative to the total amount.

Description

technical field [0001] The present invention relates to a calcium carbonate powder composition useful as a calcium fortifier for beverages and a method for its preparation. Background technique [0002] One of the uses of calcium carbonate is as a calcium fortifier for various beverages such as milk. Calcium carbonate as a calcium fortifier is added to beverages in a powder state or in a state dispersed in an aqueous medium. From the standpoint of storage stability and transportation cost reduction, it is advantageous to use in a powder state. [0003] Calcium carbonate powder is generally prepared by introducing carbon dioxide gas into an aqueous calcium hydroxide dispersion (milk of slaked lime) to carbonize calcium hydroxide to prepare an aqueous calcium carbonate dispersion, followed by drying. But, the calcium carbonate powder that above-mentioned preparation method obtains, its tiny primary particle gathers with relatively strong cohesive force, easily forms coarse p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23L1/304A23L2/52A23C9/13A61P3/02
CPCA23L2/38A23L2/52A23P10/40A23L33/16A23L29/10A23V2250/1578
Inventor 三户均内田丰隆水津真
Owner UBE CHEM IND CO LTD
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