Coating processes – Particles – flakes – or granules coated or encapsulated
Patent
1993-08-10
1994-11-01
Beck, Shrive P.
Coating processes
Particles, flakes, or granules coated or encapsulated
427221, 4274301, 588249, 588256, B05D 700
Patent
active
053606329
ABSTRACT:
Solid waste material which contains arsenic and/or mercury impurities is encapsulated in a cured polysulfide polymer so as to alleviate leaching of arsenic and/or mercury into aqueous liquids. Preferably, the solid waste material is first extracted with an alcohol such as ethanol or, alternatively, treated with an oxidizing agent such as aqueous hydrogen peroxide and then substantially dried before the encapsulation with the polymer is carried out.
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"Liquid Polysulfide Polymer" product brochure of Morton International, Chicago, Ill. no date available.
Johnson Marvin M.
Kubicek Donald H.
Nowack Gerhard P.
Simfukwe Maybin
Beck Shrive P.
Brandes K. K.
Maiorana David M.
Phillips Petroleum Company
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