Cationic polymers for use in freeze protection of coals and minerals
AssigneeNalco Chemical Company
InventorWilliam J. Roe
Life of this patent
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Abstract
A method for treating fine particles such as minerals and coal particles having surface moisture to reduce the cohesive strength of such particulate particles when frozen which comprises spraying the particles prior to freezing with an effective amount of a dilute aqueous solution of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical. In a preferred embodiment of the invention, there is also included in the aqueous solution of the freezing point depressant polymer solution from 1/2 to about 5% by weight of gelatin or hydrolyzed gelatin.
Claims8
A method for treating particulate particles having surface moisture to reduce the cohesive strength of such particulate particles when frozen which comprises spraying the particulate particles prior to freezing with an effective amount of a dilute aqueous solution which contains about 1-10% by weight of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical.
A method for treating coal particles having surface moisture to reduce the cohesive strength of such coal particles when frozen which comprises spraying the coal particles prior to freezing with an effective amount of a dilute aqueous solution which contains about 1-10% by weight of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical.
A method for treating coal particles having surface moisture to reduce the cohesive of such coal particles when frozen which comprises spraying the coal particles prior to freezing with an effective amount of a dilute aqueous solution which contains about 1-10% by weight of a water-soluble cationic polymer, which solution also contains a freezing point depressant amount of an anti-freeze chemical and from about 1/2-5% by weight of gelatin or hydrolyzed gelatin.
A composition for treating particulate particles having surface moisture to prevent freezing together of such particles which composition comprises a dilute aqueous solution which contains about 1-10% by weight of water soluble cationic polymer which solution also contains a freezing point depressant amount of an anti-freeze chemical.
Dependencies are inferred from the claim text.