Asbestos products
AssigneeTBA Industrial Products Limited
InventorsAnthony N. Magnall, Philip H. Taylor, Fred Roberts
Life of this patent
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Abstract
Coherent strands are made from a dispersion of asbestos fibres in an aqueous soap solution containing up to 100 percent molar excess of fatty acid, by a process including the steps of forming a stream of dispersion and chilling the newly formed stream sufficiently to gel the dispersion.
Claims19
A process for producing a coherent strand from a dispersion of asbestos in an aqueous soap solution containing a fatty acid in an amount up to a 100 percent molar excess over the fatty acid content of the soap comprising forming a stream of said dispersion, chilling said newly formed stream sufficiently to gel the dispersion and form a strand, said chilling step being effected by contacting the newly-formed stream with cold water, and treating the strand to prevent redispersion thereof under the action of heat.
A process to 2, wherein the cold water flows down the chute with a greater linear velocity than that of the dispersion flowing through the nozzle.
A method for producing a coherent strand from an aqueous dispersion of chrysotile asbestos fiber comprising the steps of:
- (a) forming the dispersion by combining, in water, said asbestos with a fatty acid soap and a molar excess of the fatty acid of said soap, said excess not exceeding 100 percent;
- (b) forming a stream of said dispersion;
- (c) gelling said stream of dispersion by cooling to form a coherent strand;
- (d) treating the coherent strand of step (c) substantially to prevent redispersion thereof under the action of heat;
- and
- (e) recovering said coherent strand.
A process for producing a coherent strand from an aqueous dispersion of chrysotile asbestos fiber comprising the steps of:
- (a) forming the dispersion by combining, in water said asbestos fiber with a fatty acid soap and a 25 -100% molar excess of fatty acid;
- (b) forming a stream of said dispersion and directing said stream along a downwardly inclined direction;
- (c) gelling said stream of dispersion by flowing cold water therewith to form a coherent strand;
- (d) treating said coherent strand by causing said water to change direction abruptly as said water and said strand pass in said downwardly inclined direction, thereby to form a coherent strand which is not redispersible under the action of heat;
- (e) heating said coherent strand of step (d) to dry same and extract residues of said soap and fatty acid therefrom;
- and;
- (f) recovering said dried coherent strand.
Dependencies are inferred from the claim text.