Method for the production of fillers and flame retardants based

Details Method for the production of fillers and flame retardants based Method for the production of fillers and flame retardants based

1989-02-13

1992-03-31

Rosenberg, Peter D.

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423625, 423626, 423629, C01F 702

Patent

active

051006413

ABSTRACT:
A process is disclosed for producing aluminum hydroxide in the form of gibbsite in particular shapes, suitable for use as a filler, flame retardant and/or fibrous reinforcement. The process includes the steps of crystallizing gibbsite from a Bayer process sodium aluminate liquor, in the presence of an additive comprising either a hydroxycarboxilic acid for producing needle shaped, rod-like hydrargillite or in the presence of a polyalcohol, fatty acid or lithium compound for producing platy or tabular gibbsite.

REFERENCES:
patent: 3874889 (1975-04-01), Geppert
patent: 4612184 (1986-09-01), Seigneurin
patent: 4900537 (1990-02-01), Wilhelmy

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