Compositions – Dust suppressants for bulk materials – or processes of...
Patent
1988-10-26
1990-10-02
Lieberman, Paul
Compositions
Dust suppressants for bulk materials, or processes of...
299 12, 404 76, C09K 322
Patent
active
049605321
ABSTRACT:
This suppressant comprises at least 45% water. A water thickening agent is dissolved in water, and forms with water the dispersion medium. A coal tar pitch is dissolved in an aromatic solvent and forms the dispersed liquid which results in suspension. The aromatic solvent has generally a residual softening point of about 40.degree.-70.degree. C. (as measured by ASTM-D-36). This dust suppressant has a viscosity of 3500 to 15000 cps at 25.degree. C. A process for making same comprises: 1- adding to water having a pH of about 7 to 9, a thickening agent to form a dispersion medium having a viscosity of at least 2000 centipoises at 25.degree. C. as measured with ASTM-D4420, with a Brookfield, 2- dispensing under high shear conditions into the dispersion medium, a pitch dissolved in an aromatic solvent, at least 70% of which is boiling over 270.degree. C., to obtain a (in concentrate form) suspension having at least 45% water content. The concentrate form may be diluted to obtain a diluted suspension having 90-98% water content by weight, and 2-10% by weight of the concentrate form, and used by directly spraying the diluted suspension at the rate 10-40 grams of solids per metric ton of dusting material.
REFERENCES:
patent: 819012 (1906-04-01), Hardcastle
patent: 855860 (1907-06-01), Mattar et al.
patent: 924086 (1909-06-01), Meadows et al.
patent: 1340855 (1920-05-01), Weiss
patent: 2116682 (1938-05-01), Kleinicke et al.
patent: 2448605 (1948-09-01), Kleinicke
patent: 2621115 (1965-12-01), Van Order
patent: 2646361 (1953-07-01), Rostler
patent: 2670332 (1954-02-01), McCoy et al.
patent: 2786815 (1957-03-01), Buggisch et al.
patent: 2814554 (1957-11-01), Rowse
patent: 3708319 (1973-01-01), Nimerick et al.
patent: 4214875 (1980-07-01), Kromrey
patent: 4264333 (1981-04-01), Shaw
patent: 4316811 (1982-02-01), Burns et al.
patent: 4369171 (1983-01-01), Grindstaff et al.
patent: 4561905 (1985-12-01), Kittle
patent: 4642196 (1987-02-01), Yan
patent: 4650598 (1987-03-01), Roberts et al.
Beadles-Hay A.
Carbochem Inc.
Gauvin Antoine H.
Lieberman Paul
LandOfFree
Dust suppressant forming a resilient layer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Dust suppressant forming a resilient layer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dust suppressant forming a resilient layer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-290828