Calcium Carbonate → HCID 178526098, compound

200 g of an aqueous silver nitrate solution containing 52 g of silver nitrate was added dropwise to 1,200.0 g of a slurry solution containing 115.3 g of calcium carbonate having a surface area of 0.4 m2/g and an alkali metal content of 20 ppm or less (reagent distributed by Nacalai Tesque, Inc.) as alkaline earth metal carbonate at 20° C. to 25° C., followed by stirring for 3 hours. The solid was collected by filtration, washed with 200 mL of ion exchanged water four times to obtain 193 g of a silver carbonate/calcium carbonate mixture. Then, 48.3 g of the resulting silver carbonate/calcium carbonate mixture and 25 g of ion exchanged water were put into a flask, and adding 5.2 g of ethylenediamine, 5.4 g of oxalic acid and 1.8 g of monoethanolamine, followed by stirring for one hour, and further dried at 70° C. under reduced pressure. Then, a silver catalyst was prepared by filling the obtained powder into a calcination glass tube, and subjecting the powder to calcination at 350° C. for 3 hours under air flow of 100 mL/min.

1. customat 20° C. to 25° C.
2. filtrationThe solid was collected by filtration
3. washwashed with 200 mL of ion

ORD record

ord-a1420219955f41af83d4a4935ca8dd08

Source dataset

uspto-grants-2011_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07928034B2