Oxidation of wax in the presence of a soluble catalyst
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It has been established that the formation of manganese soaps of a soluble oxidation catalyst in fatty acids proceeds best by the action of an alkali on manganese sulfate, previously mixed with oxidized wax.
It is advantageous to prepare the soluble catalyst with a reduced amount of oxidate, basing this on preparation from the saponification value.
It has been shown that the losses of manganese with the sulfate waters separated from the manganese soaps are reduced to 3–4% when alkali diluted to 30% is used with an excess of alkali in the precipitated hydrated manganous oxide hydrate up to 30% of the theoretically required amount for the reaction with manganese sulfate.
Here the losses of sodium with the sulfate waters are about 5% of the amount of sodium introduced with the excess alkali.
It has been established that the oxidation of wax with a soluble catalyst begins without an induction period leading to a reduction of about 10% in the duration of the reaction.
This enables the oxidation process to be carried out continuously under low-temperature conditions to give oxidation products of improved quaiity.
The rate of wax oxidation involving a soluble catalyst increases as its concentration in the feedstock being oxidized is reduced from 0.13 to 0.07 wt, %, calculated as manganese.
KeywordsOxidation Sodium Sulfate Hydrate Oxide Hydrate
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