Compositions comprising mineral particles in suspension and meth

Details Compositions comprising mineral particles in suspension and meth Compositions comprising mineral particles in suspension and meth

1986-07-29

1987-12-08

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

1621646, 1621682, 1621683, 1621811, 1621814, 1621818, 210728, C02F 156

Patent

active

047117273

ABSTRACT:
An aqueous slurry of mineral particles, for example calcium carbonate and/or calcium hydroxide, has a mineral solids concentration of at least 40% m/m and contains an agent that maintains the slurry at a pumpable viscosity but that acts as a flocculant upon dilution of the slurry. Suitable agents include cationic and amphoteric polyelectrolytes having nitrogen-containing groups, for example polyamines and dimethyl diallyl ammonium chloride polymers. The slurries may contain other components, for example a synthetic hectorite or a dispersing agent such as a polyacrylate, polymethacrylate or polyphosphate. The slurries are useful in papermaking and in the treatment of sewage.

REFERENCES:
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patent: 4402851 (1983-09-01), Lindahl
patent: 4425238 (1984-01-01), Degen et al.
patent: 4450092 (1984-05-01), Huang
patent: 4565635 (1986-01-01), Le Du et al.
patent: 4610801 (1986-09-01), Matthews et al.

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