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US 5,977,403 AGranted
Method for the production of lower organic peracids
AssigneeFMC Corporation
InventorLance R. Byers
Life of this patent
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Abstract
Dilute, aqueous solutions of lower organic peracids are rapidly prepared by reacting the anhydride of the organic acid corresponding to the peracid with concentrated hydrogen peroxide to form an aqueous peracid mixture. Before equilibrium is attained, the mixture is diluted with water and hydrogen peroxide to produce an equilibrium mixture of organic acid, peracid, hydrogen peroxide, and water. The process can be carried out in 60 minutes or less and can be run either as a batch or as a continuous process.
Claims21
A rapid process for the production of a dilute, aqueous solution of a lower organic peracid, the process comprising:
- (a) preparing a mixture comprising an anhydride corresponding to the lower organic peracid, hydrogen peroxide, water, an acid catalyst, and optionally the organic acid corresponding to the lower organic peracid;
- (b) allowing the mixture to react for about 60 minutes or less;
- and
- (c) diluting the mixture with water, with hydrogen peroxide, and, optionally, with the organic acid to produce the dilute, aqueous solution;
- wherein:
- the amounts of anhydride, organic acid, hydrogen peroxide, and water used in steps (a) and (c) are effective to produce a predetermined, equilibrium concentration of the peracid;
- the dilute, aqueous solution comprises about 0.5 wt % to about 15 wt % of peracid;
- the concentration of the lower organic peracid in the dilute, aqueous solution produced in step (c) is about the predetermined, equilibrium concentration;
- and
- the hydrogen peroxide used in step (a) is 50 wt % to 90 wt % hydrogen peroxide in water.
7 more elements
Dependencies are inferred from the claim text.