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US 4,968,518 AGranted
Process for the treatment of frying and/or cooking oil
AssigneeKlenz, Inc.
InventorMichael Lopez
Life of this patent
Estimating the term…
Abstract
A process for recycling used cooking oil is disclosed. Used cooking oil is contacted with an aqueous solution containing ethylene diamine tetra acetic acid, n-propyl-3,4,5-trihydrobenzoate, mono-tert-butylhydroquinone, or a combination of these, to form a water/oil mixture. The water/oil mixture is then separated into its oil and aqueous components to obtain a regenerated oil.
Claims11
A process for treating used cooking oil, comprising:
- (i) contacting at least a portion of said used cooking oil with an aqueous solution containing at least 20 ppm of a regeneration agent which is at least one member selected from the group consisting of ethylenediamine tetraacetic acid and n-propyl-3,4,5-trihydrobenzoate, to obtain a water/oil mixture;
- and
- (ii) separating the oil and the aqueous components of said water/oil mixture to obtain a regenerated oil.
In a process for frying a food product in oil, the improvement comprising:
- (i) continuously withdrawing a portion of the oil used in the frying operation;
- (ii) contacting said portion of oil with an aqueous solution containing at least 20 ppm of a regeneration agent which is at least one member selected from the group consisting of ethylenediamine tetraacetic acid and n-propyl-3,4,5-trihydrobenzoate, to obtain a water/oil mixture;
- (iii) separating the oil and the aqueous components of said water/oil mixture to obtain a regenerated oil;
- and
- (iv) returning said regenerated oil to said frying operation.
2 more elements
Dependencies are inferred from the claim text.