Hexamethylenetetramine → Sodium Hydroxide

A cobalt chloride solution (2 mol/L) and sodium hydroxide solution (8 mol/L) were prepared respectively. To the cobalt chloride solution, hexamethylenetetramine was added. The resultant mixture and the sodium hydroxide solution were simultaneously added into a reactor by a cocurrent method, and allowed to react at 60° C. with pH value at 10.5. Air was charged uniformly as an oxidant, and the amount thereof was 1.8 times that needed for completely oxidizing the generated cobalt hydroxide. After reaction, the solution was aged for 12 hrs at a constant temperature, dried at 110° C., and roasted at 400° C. for 8 hrs to yield spherical tricobalt tetraoxide with diameter D50 of 11 μm and tap density of 2.5 g/cm3.

1. customto react at 60° C. with pH value at 10.5
2. additionAir was charged uniformly as an oxidant
3. customAfter reaction
4. customdried at 110° C.
5. waitroasted at 400° C. for 8 hrs

ORDレコード

ord-3966354d57aa494698d8b0f59d1de335

出典データセット

uspto-grants-2011_08

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07998452B2