Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1973-10-01
1976-06-15
Spear, Jr., Frank A.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
B01D 1104
Patent
active
039636100
ABSTRACT:
Phenol is removed from waste waters that occur in the manufacture of phenol by the cumene process wherein cumene is used as an extractant. The cumene which is used for extracting the phenol from the waste water and which is thereafter washed with sodium hydroxide to remove the phenol is treated prior to this washing with an aqueous solution of 1 to 20 wt-% preferably 5 to 10 wt-% sodium carbonate. If desired the aqueous solution can also contain sodium sulphate in amounts of 1 to 15% by weight. The sodium carbonate solution may also contain a non-ionogenic, surface-active substance such as aryl polyglycol ethers in amounts of from 0.001 to 1% by weight.
REFERENCES:
patent: 2807654 (1957-09-01), Grimmett et al.
patent: 3300405 (1967-01-01), Black
patent: 3446732 (1969-05-01), Gasser et al.
Brenienek Harri
Hauschulz Bruno
Jordan Wilfried
Mertmann Josef
Rasner Gerhard
Phenolchemie GmbH
Spear, Jr. Frank A.
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