TY - JOUR
T1 - Preparation of Metal Oxide Gel Spheres with Hexamethylenetetramine as an Ammonia Donor
AU - Haas, Paul A.
AU - Pitt, W. Wilson
AU - Robinson, Sharon M.
AU - Ryon, Allen D.
PY - 1983/9/1
Y1 - 1983/9/1
N2 - Gel spheres containing UO3, (Th,U)Ox, Al2O3, Al2O3-ZrO2, and mixtures of various other metal oxides (including Fe, Zr, Al, and Si) have been produced by the internal gelation process by the same general flowsheet. In the internal gelation process, hexamethylenetetramine (HMTA) decomposes to produce ammonia which precipitates hydrous metal oxides gels. The process conditions (metal molarities, HMTA/unneutralized metal ratio, urea/metal ratio, and gelation temperatures) are within the same ranges for all of the products. Selection of the feed compositions and process conditions can be guided by the general criteria described, but optimum conditions need to be determined empirically. General process requirements are discussed in detail, and products made under these conditions are described.
AB - Gel spheres containing UO3, (Th,U)Ox, Al2O3, Al2O3-ZrO2, and mixtures of various other metal oxides (including Fe, Zr, Al, and Si) have been produced by the internal gelation process by the same general flowsheet. In the internal gelation process, hexamethylenetetramine (HMTA) decomposes to produce ammonia which precipitates hydrous metal oxides gels. The process conditions (metal molarities, HMTA/unneutralized metal ratio, urea/metal ratio, and gelation temperatures) are within the same ranges for all of the products. Selection of the feed compositions and process conditions can be guided by the general criteria described, but optimum conditions need to be determined empirically. General process requirements are discussed in detail, and products made under these conditions are described.
UR - http://www.scopus.com/inward/record.url?scp=0020821904&partnerID=8YFLogxK
U2 - 10.1021/i300011a015
DO - 10.1021/i300011a015
M3 - Article
AN - SCOPUS:0020821904
SN - 0196-4321
VL - 22
SP - 461
EP - 466
JO - Industrial and Engineering Chemistry Product Research and Development
JF - Industrial and Engineering Chemistry Product Research and Development
IS - 3
ER -