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Polyaluminum calcium hydroxychlorides and methods of making the same

A technology of aluminum chloride and aluminum source, applied in the direction of aluminum chloride, chemical instruments and methods, preparation of alkaline earth metal aluminate/aluminum oxide/aluminum hydroxide, etc., capable of solving the problem of undisclosed polymerized calcium-aluminum hydroxychloride composition And other issues

Inactive Publication Date: 2009-06-17
GENERAL CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, none of the prior art cited above discloses a polymeric aluminum calcium hydroxychloride composition comprising large polymeric aluminum species (band I) and small monomeric aluminum species (band IV) as determined by SEC-HPLC

Method used

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  • Polyaluminum calcium hydroxychlorides and methods of making the same
  • Polyaluminum calcium hydroxychlorides and methods of making the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

Example 1 : Preparation of PAC-Ca solution by adding aluminum chloride to the reaction product - Method A

[0033] Mix 191 parts of aluminum chloride with 269 parts of water heated to 80°C to 90°C, add 20 parts of calcium oxide (99% purity) and react to form a transparent solution, followed by adding aluminum powder. The reaction was terminated after 1.5 hours. After filtration a clear colorless solution was obtained with 6.03% Al, 3.0% Ca and 8.9% Cl. PAC-Ca solutions with different Al / Cl ratios and basicities were prepared by adding different amounts of AlCl solution to the above transparent solution. The results are listed in Table I.

Table I

Experiment number Al / Cl ratio ％Al %Ca % Alkalinity % Band I % Band IV 1 0.5 5.78 1.56 45.5 5.0 81.7 2 0.6 5.87 2.10 60.5 13.2 66.0 3 0.7 5.94 2.48 71.0 23.4 48.4 4 0.8 5.98 2.73 77.7 30.4 31.1

Note: It has been found that the larger polyaluminum species, represent...

Embodiment 2

Example 2 : Preparation of PAC-Ca solution by adding aluminum chloride to the reaction product - Method B

[0034] The different aluminum chloride solutions were added to the solution of the reaction product prepared as follows by mixing bauxite, calcium aluminate and aqueous hydrochloric acid at about 100°C and heating for the required period of time, cooling , settled, filtered and dried. The results of the obtained PAC-Ca solutions are listed in Table II.

Table II

Experiment number Al / Cl ratio ％Al %Ca % Alkalinity % Band I % Band IV 5 0.50 7.0 2.66 50.5 5.4 86.5 6 0.60 7.0 2.73 61.9 16.3 60.8 7 0.70 7.0 3.25 72.9 27.0 32.6 8 0.76 7.0 346 78.0 33.6 313

Embodiment 3

Example 3: Comparison of PAC-Ca solutions prepared by adding acidic aluminum solution to the reaction product according to Method A at high and low temperatures

(i) Preparation of acidic aluminum solution

[0035] 785 parts of the aluminum chloride solution are mixed with 183 parts of water and heated. Add 32 parts of aluminum powder and react at 90°C to 95°C for about 1 hour. The reaction mixture was filtered to obtain a clear solution containing 7.6% Al and 17.5% Cl with an Al / Cl ratio of 0.57.

(ii) Preparation of PAC-Ca solution at low temperature

[0036] 106 parts of aluminum chloride, 123 parts of water and 8.75 parts of calcium oxide were mixed and refluxed for 1 hour to obtain an almost transparent solution, then the solution was cooled to about 55°C, and aluminum powder was added at this temperature within about 40 minutes. °C to 70 °C for 6.5 hours. The reaction mixture was filtered. 100 parts of this solution were mixed with 17 parts of the acidic aluminum s...

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Abstract

A process is provided for the preparation of a novel polyaluminum calcium hydroxychloride composition of enhanced efficiency for water treatment, paper sizing, and antiperspirant applications. The polyaluminum calcium hydroxychloride compositions are prepared via the acidification of higher basicity reaction products to form mid-to-high basicity final products. Two methods are provided for the preparation of higher basicity products, contemplated in the first, and an aqueous acid solution, such as hydrochloric acid, aluminum chloride, or a mixture thereof, is mixed with a strong alkaline calcium salt such as calcium oxide or calcium carbonate and aluminum powder at temperatures greater than 60 DEG C. In a second method, bauxite, aluminum hydrate, or aluminum metal, and calcium aluminate are mixed with hydrochloric acid and are reacted at high temperatures and / or elevated pressures for a certain period of time whereby, when the reaction is complete, the mixtures are filtered to obtain clear solutions. The final PAC-Ca solutions may be dried to powder to have a wide range of basicities from about 40% to about 80%. At lower basicities, the polyaluminum calcium hydroxychloride sales are used preferably as antiperspirants, while at higher basicities, the solutions are used preferably as water treatment chemicals.

Description

technical field [0001] The present invention relates to novel polymeric aluminum calcium hydroxychloride compositions and to methods of preparing compositions suitable for use as water treatment coagulants, paper sizing applications; and as antiperspirant active ingredients. The polymeric aluminum calcium hydroxychloride compositions contemplated by the present invention comprise large aggregated and small monomeric aluminum species as determined by SEC (Size Exclusion Chromatography)-HPLC (High Performance Liquid Chromatography). These polymeric and monomeric aluminum species, known as Band I and Band IV materials, are obtained by acidifying the reaction products formed by the high temperature reaction of (1) an aluminum source and an aqueous acidic aluminum solution, and (2) a base Calcium salts such as calcium oxide, calcium carbonate and calcium aluminate. Aluminum sources include, but are not limited to, aluminum metal, aluminum hydroxide / oxide, or alumina. The solution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/00C01F7/16C01F7/56A61Q15/00A61K8/26C02F1/52C01F7/57C01F7/78
CPCC01F7/56A61Q15/00C01P2002/87C01P2006/90A61K8/26C02F1/5245C01F7/002C01F7/78C01F7/57
Inventor Z·李M·里尔克K·贾纳克
Owner GENERAL CHEM CORP
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