Title:
METHOD FOR ADDING SILVER TO CALCIUM CARBONATE
Document Type and Number:
Japanese Patent JPH04219196
Kind Code:
A
Abstract:
PURPOSE: To safely stick silver to the surface of porous calcium carbonate such as coral sand as a water purifying agent by immersing the calcium carbonate in a silver nitrate soln., dehydrating and heating the calcium carbonate.
CONSTITUTION: Calcium carbonate is immersed in a silver nitrate soln. for a long time, dehydrated and uniformly heated at ≥200°C in the air or in a flow of gaseous nitrogen to stick silver to the surface of the calcium carbonate by reduction.
Inventors:
ASAI SOICHI
Application Number:
JP7203991A
Publication Date:
August 10, 1992
Filing Date:
March 13, 1991
Export Citation:
Assignee:
KOORARU BAIOTETSUKU KK
International Classes:
A01N59/16; C02F1/28; C02F1/50; (IPC1-7): A01N59/16; C02F1/28; C02F1/50
Domestic Patent References:
| JPH0411988A | 1992-01-16 | |||
| JPS6334228A | 1988-02-13 |
Attorney, Agent or Firm:
Tsuneyuki Inaki (1 person outside)