Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1995-06-07
1996-08-13
Suchfield, George A.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
588252, 588901, B09B 300
Patent
active
055458050
ABSTRACT:
A process for providing more efficient and effective chemical stabilization of solid residues containing lead is described. The process consists of introducing into the residue, or solutions in contact with these residues, polyprotic acid oxyanions that can form insoluble acid oxyanion-lead complexes in solution. Included in this category of compounds are phosphates, borates, vanadates, selenates, arsenates, carbonates, chromates and sulfates. To maximize the effectiveness of acid oxyanion treatment of lead-bearing residues that also contain noncarbonate hardness producing elements such as calcium and magnesium, the introduction of an alkali-metal carbonate, such as sodium carbonate, along with the acid oxyanion is recommended. This alkali-metal carbonate additive can increase the solubility of acid-oxyanions, particularly in solutions with high levels of calcium and magnesium, thereby promoting the more efficient formation of insoluble lead-oxyanion complexes.
REFERENCES:
patent: 3947248 (1976-03-01), Powers
patent: 4049462 (1977-09-01), Cocozza
patent: 4258017 (1981-03-01), Gelfand
patent: 4375986 (1983-03-01), Pichat
patent: 4443415 (1984-04-01), Queneau
patent: 4572797 (1986-02-01), Silver
patent: 4645651 (1987-02-01), Hahn
patent: 4671882 (1987-06-01), Douglas
patent: 4701219 (1987-10-01), Bonee
patent: 4737356 (1988-04-01), O'Hara
patent: 4762623 (1988-08-01), Kapland
patent: 4788044 (1988-11-01), Corigliano
patent: 4889640 (1989-12-01), Stanforth
patent: 4891130 (1990-01-01), Pitts
patent: 4917733 (1990-04-01), Hansen
patent: 5008017 (1991-04-01), Kiehl et al.
patent: 5009793 (1991-04-01), Muller
patent: 5037479 (1991-08-01), Stanforth
patent: 5045115 (1991-09-01), Gmunder
patent: 5150985 (1992-09-01), Roesky
patent: 5162600 (1992-11-01), Cody et al.
patent: 5193936 (1993-03-01), Pal
patent: 5202033 (1993-04-01), Stanforth
patent: 5202062 (1993-04-01), Baba et al.
patent: 5230876 (1993-07-01), Hutter
patent: 5245121 (1993-09-01), Gall et al.
patent: 5266203 (1993-11-01), Mukhopadhyay
patent: 5282977 (1994-02-01), Schinkitz
patent: 5296293 (1994-03-01), Jobst
patent: 5430233 (1995-07-01), Forrester
patent: B13837872 (1986-03-01), Conner
Wheelabrator Environmental Systems Inc., "The West-Phix.RTM. Process" 1994, 4 page advertisement.
Chesner Engineering, PC
Suchfield George A.
Walker Alfred M.
LandOfFree
Enhanced stabilization of lead in solid residues using acid oxya does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Enhanced stabilization of lead in solid residues using acid oxya, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Enhanced stabilization of lead in solid residues using acid oxya will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1049210