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US 5,671,768 AGranted
Emergency dump tank for congealable materials
AssigneeCourtaulds Fibres (Holdings) Limited
InventorsKatharine Anne Wykes, Michael Colin Quigley
Life of this patent
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Abstract
A dump tank for receiving congealable material vented from a chemical process, the dump tank having two access doors covering two access ports, both doors being openable for cleaning purposes so that congealable material vented into the tank can be pushed out of one access port from the other port.
Claims4
A process for safely venting a solution of cellulose in an aqueous N-methylmorpholine N-oxide solvent from pipeline following an exotherm of said solution, which process includes the steps of:
- (1) transporting said solution via a dump line to a dump tank defining a chamber;
- said chamber communicating with an entry port for said dump line and having a vapour exit port communication to atmosphere and an access port having an openable access door;
- (2) permitting at least partial cooling and congealing of said solution in said chamber;
- (3) opening said access door to permit access to said chamber;
- and
- (4) removing at least partially congealed solution from said chamber.
3 more elements
Dependencies are inferred from the claim text.