Sumitomo Osaka Cement Co., Ltd.

Japan

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IPC Class
C01F 11/18 - Carbonates 2
B01D 53/62 - Carbon oxides 1
B01D 53/75 - Multi-step processes 1
B01D 53/78 - Liquid phase processes with gas-liquid contact 1
B09B 3/70 - Chemical treatment, e.g. pH adjustment or oxidation 1
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Found results for  patents

1.

METHOD FOR FIXING CARBON DIOXIDE, METHOD FOR PRODUCING CALCIUM CARBONATE, AND METHOD FOR UTILIZING WASTE GYPSUM BOARD

      
Document Number 03233746
Status Pending
Filing Date 2022-09-26
Open to Public Date 2023-04-06
Owner
  • SUMITOMO OSAKA CEMENT CO., LTD. (Japan)
  • YAMAGUCHI UNIVERSITY (Japan)
  • KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION (Japan)
Inventor
  • Kikuchi, Sadato
  • Nakamura, Shogo
  • Oizumi, Risa
  • Konishi, Masayoshi
  • Higa, Mitsuru
  • Taniguchi, Ikuo

Abstract

The present invention provides a method whereby carbon dioxide can be efficiently fixed and calcium carbonate, which is a valuable, can be efficiently produced from the carbon dioxide, and whereby waste gypsum boards can be effectively utilized for fixing carbon dioxide without being discarded. This method comprises a first step, in which a first solution, which contains an alkali metal hydroxide, is brought into contact with a gas including carbon dioxide to thereby yield a second solution, which contains an alkali metal salt, and a second step, in which the second solution is brought into contact with a gypsum-containing substance to thereby yield calcium carbonate.

IPC Classes  ?

2.

CALCIUM CARBONATE GENERATION METHOD AND SYSTEM

      
Document Number 03230476
Status Pending
Filing Date 2022-08-31
Open to Public Date 2023-03-09
Owner
  • SUMITOMO OSAKA CEMENT CO.,LTD. (Japan)
  • YAMAGUCHI UNIVERSITY (Japan)
  • KYUSHU UNIVERSITY,NATIONAL UNIVERSITY CORPORATION (Japan)
Inventor
  • Kikuchi, Sadato
  • Nakamura, Shogo
  • Oizumi, Risa
  • Konishi, Masayoshi
  • Higa, Mitsuru
  • Taniguchi, Ikuo

Abstract

Provided are a calcium carbonate generation method and a system that make it possible to use calcium-containing waste to generate high-purity calcium carbonate.?According to the present invention, a calcium carbonate generation method that generates calcium carbonate from calcium-containing waste is characterized by having a calcium dissolution step for adding aqueous hydrochloric acid to the calcium-containing waste to dissolve the calcium and generate an aqueous solution that includes calcium ions, a separation step for adjusting a hydrogen ion concentration index for the aqueous solution that includes the calcium ions and separating a component that includes at least one substance selected from the group that consists of Si, Al, Mg, and heavy metals from the aqueous solution, and a calcium carbonate recovery step for using the aqueous solution obtained via the separation step and an aqueous solution that includes potassium carbonate and/or sodium carbonate to generate calcium carbonate.

IPC Classes  ?

  • C01F 11/18 - Carbonates
  • B09B 3/70 - Chemical treatment, e.g. pH adjustment or oxidation
  • C01D 7/32 - Purification by dialysis
  • C04B 7/60 - Methods for eliminating alkali metals or compounds thereof