Purification of formaldehyde by separation
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsTetsuya Miyake, Kunihiko Takeda, Naoki Miyata, Tatsushi Saeki, Maomi Seko
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Abstract
A mixture containing formaldehyde and water is separated effectively by contacting with adsorbents of specific type A zeolites containing exchanged cations of the elements from Group IA (4) to (6) or Group IIA (6) or mixture thereof of the Periodic Table of Elements.
Claims17
A process for purification of formaldehyde by separation, which comprises contacting with adsorbents selected from the group consisting of type A synthetic zeolites wherein the exchangeable cations contain at least one of the Group IA, from the fourth to the sixth period, and Group IIA, the sixth period, of the Periodic Table of Elements a solution containing water, formaldehyde and a stabilizer against polymerization of formaldehyde thereby selectively to adsorb water on said adsorber and to leave a stream enriched in formaldehyde and containing the stabilizer.
Dependencies are inferred from the claim text.