Process for the preparation of an ultra pure solution of hydrogen peroxide by ion exchange with recycling
AssigneeL'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
InventorsHenry Ledon, Christine Devos, Didier Demay
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Abstract
Provided is a process for the preparation of an ultrapure hydrogen peroxide solution. The process comprises at least one sequence which includes passing a solution to be purified successively through at least one bed of anion-exchange adsorbents (AEA) and at least one bed of cation-exchange adsorbents (CEA). A non-zero proportion of the solution exiting from one of the beds is recycled to a point upstream of the one bed or upstream of a preceding bed or upstream of the first bed of the first of the at least one sequence. Also provided is a plant for the implementation of the inventive process.
Claims8
A process for the preparation of an ultrapure hydrogen peroxide solution, comprising at least one sequence which includes passing a hydrogen peroxide solution to be purified successively through at least one bed of anion-exchange adsorbents and at least one bed of cation-exchange adsorbents at a throughput of between 0.5 and 100 bed volumes per hour, wherein a non-zero proportion of the solution exiting from one of said beds is recycled to a point upstream of said one bed or upstream of a preceding bed or upstream of the first bed of the first of said at least one sequence.
Dependencies are inferred from the claim text.