Hazardous or toxic waste destruction or containment – Containment – Solidification – vitrification – or cementation
Patent
1994-03-21
1996-05-14
Taylor, Dennis L.
Hazardous or toxic waste destruction or containment
Containment
Solidification, vitrification, or cementation
588249, 405128, A62D 300
Patent
active
055169740
ABSTRACT:
The present invention provides an immobilizing agent for making harmless the detrimental metals contained in fly ash formed from an urban dust incinerating plant and a method for immobilizing the fly ash. The treating agent according to the present invention contains .alpha. starch and/or dextrin (component A), sodium silicate and/or a hydrogen phosphate compound (component B) and an allophane having a molecular ratio of SiO.sub.2 /Al.sub.2 O.sub.3 of not lower than 2 (component C). It may also further contain cement, bentonite, calcined gypsum and fly ash formed from a coal thermoelectric power plant. The mixing ratio of the components A, B and C is preferably 100 parts by weight: 20 to 160 parts by weight: 40 to 180 parts by weight respectively. The treating agent is mixed with the above-mentioned fly ash and water is added to it and the mixture is milled and then used. The treating agent of the present invention can enclose detrimental metals stably with no second elution and thus is effective for immobilizing treatment.
REFERENCES:
patent: 3720609 (1973-03-01), Smith et al.
patent: 4101332 (1978-07-01), Nicholson
patent: 4226630 (1980-10-01), Styron
patent: 4600514 (1986-07-01), Conner
patent: 4737356 (1988-04-01), O'Hara et al.
patent: 5284636 (1994-02-01), Goff et al.
patent: 5285000 (1994-02-01), Schwitzgebel
patent: 5346549 (1994-09-01), Johnson
patent: 5399048 (1995-03-01), Walker
Katayama Kazuya
Nishida Tomio
Oshima Masanori
Sasae Taiichiro
Polution Sciences Laboratory Incorporated
Taylor Dennis L.
LandOfFree
Treating agent for making harmless and immobilizing fly ash cont does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Treating agent for making harmless and immobilizing fly ash cont, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Treating agent for making harmless and immobilizing fly ash cont will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1897357