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Patent Searching and Data


Title:
CITRIC ACID AND CALCIUM CITRATE, AND MANUFACTURING METHOD FOR THE SAME
Document Type and Number:
Japanese Patent JP2003221362
Kind Code:
A
Abstract:

To provide a method for manufacturing citric acid and calcium citrate efficiently and at a low cost by effectively utilizing an Ume (Japanese apricot) vinegar, and a shell of a scallop, or the like, an eggshell, or the like, which are conventionally discarded as wastes.

Calcium citrate is manufactured by the steps of carrying out desalination treatment of the Ume vinegar, then adding the powder of calcium carbonate or calcined calcium obtained from the scallop shell, the eggshell or a fossil coral into the treated Ume vinegar and mixing, and separating a formed precipitate. Further, citric acid is manufactured by the steps of adding sulfuric acid to the calcium citrate, separating and removing formed calcium sulfate, and concentrating and drying a residual aqueous solution.


Inventors:
Azuma, Yoshihiko
Matsui, Toru
Application Number:
JP2002000341038
Publication Date:
August 05, 2003
Filing Date:
November 25, 2002
Export Citation:
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Assignee:
AZUMA NOEN:KK
International Classes:
A23L1/212; A23L1/30; C07C51/43; C07C51/47; C07C51/48; C07C51/487; C07C59/265; (IPC1-7): C07C51/43; A23L1/212; C07C51/47; C07C51/48; C07C51/487; C07C59/265
Attorney, Agent or Firm:
吉田 芳春