Carbon molecular sieves for purification of chlorofluorocarbons
AssigneeAllied-Signal Inc.
InventorChin-Hsiung Chang
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Abstract
Chlorofluorocarbons are purified by removing hydrofluoric and hydrochloric acids with a carbon molecular sieve having an average pore size of about 3.5 Angstroms with no more than about 5% of the pores having a size less than 3.2 Angstroms and no more than about 5% of the pores having a size greater than 4.2 Angstroms.
Claims9
A process for the removal of hydrofluoric and hydrochloric acids from chlorofluorocarbons comprising contacting said chlorofluorocarbons at removal conditions with a sufficient amount of a carbon molecular sieve having an average pore size of about 3.5 Angstroms with no more than about 5% of the pores having a size less than 3.2 Angstroms and no more than about 5% of the pores having a size greater than 4.2 Angstroms.
Dependencies are inferred from the claim text.