METHOD FOR PRODUCING WHITE ALUMINUM HYDROXIDE AND WHITE ALUMINUM HYDROXIDE

Title:

METHOD FOR PRODUCING WHITE ALUMINUM HYDROXIDE AND WHITE ALUMINUM HYDROXIDE

Document Type and Number:

Japanese Patent JP2003089520

Kind Code:

A

Abstract:

To provide a method capable of easily producing a white aluminum hydroxide having a high degree of whiteness.

The method for producing the white aluminum hydroxide comprises a step of heating a mixture obtained by mixing a crude aluminum hydroxide with an alkaline solution to dissolve 10-90 mass% crude aluminum hydroxide based on the crude aluminum hydroxide used and to obtain a slurry containing a solid of aluminum hydroxide and a step of cooling the slurry to precipitate an aluminum hydroxide. The mixture is usually heated to ≥80°C. By this method, the objective white aluminum hydroxide whose sodium content is ≤25 mass% (expressed in terms of oxide (Na2O)) is obtained.

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Inventors:

EGUCHI NAOYUKI
TAKEUCHI KIYOSHI
KATO HISAKATSU

Application Number:

JP2002202193A

Publication Date:

March 28, 2003

Filing Date:

July 11, 2002

Export Citation:

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Assignee:

SUMITOMO CHEMICAL CO

International Classes:

C01F7/46; (IPC1-7): C01F7/46

Attorney, Agent or Firm:

Takao Suzuki (3 others)

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