公开(公告)号：US20240382937A1

公开(公告)日：2024-11-21

申请号：US18691983

申请日：2022-07-04

Applicant: POLYNT S.P.A.

Inventor： Carlotta CORTELLI ,  Laura FRATALOCCHI ,  Lorenzo GRAZIA

IPC: B01J27/199 ,  B01J27/198 ,  B01J37/08 ,  C07D307/60

Abstract: The present invention relates to a vanadium and phosphorus mixed oxide (VPO) catalyst for the partial oxidation of n-butane to maleic anhydride. comprising vanadyl pyrophosphate as main component and at least one first promoter element selected from cobalt, iron, copper and mixtures thereof. The present invention further relates to a process for the production of maleic anhydride by partial oxidation of n-butane in the presence of the above mentioned catalyst.

公开(公告)号：US20250128246A1

公开(公告)日：2025-04-24

申请号：US18682663

申请日：2022-07-05

Applicant: POLYNT S.P.A.

Inventor： Carlotta CORTELLI ,  Lorenzo GRAZIA ,  Laura FRATALOCCHI

IPC: B01J35/00 ,  B01J23/28 ,  B01J23/847 ,  B01J37/00 ,  B01J37/02 ,  C07D307/83

Abstract: The present invention relates to a catalytic bed for the production of phthalic anhydride by oxidation of o-xylene and/or naphthalene. The catalytic bed comprises at least four layers of vanadium and titanium mixed oxide (VTiO) catalyst, arranged in series with respect to the flow of a gaseous feed mixture comprising o-xylene and/or naphthalene and an oxygen-containing gas, where the chemical composition and the height of the four layers of catalyst are optimized to improve the catalytic performance and their lifetime. The present invention also relates to a process for the production of phthalic anhydride by oxidation of o-xylene and/or naphthalene, which uses the above catalytic bed.