Metal organic frameworks for the capture of volatile organic compounds

US11426704B2 · kind B2 · utility

Assignees

• CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE · FR
• ECOLE NORMALE SUPERIEURE DE PARIS · FR
• ECOLE SUPERIEURE DE PHYSIQUE ET DE CHIMIE INDUSTRIELLES DE LA VILLE DE PARIS · FR
• Universite de Versailles Saint-Quentin-en-Yvelines · FR
• INSTITUTO SUPERIOR TÉCNICO · PT

Inventors

• Christian Serre · Plaisir, FR
• Moises PINTO · Lisbon, PT

Key dates

• Filing date: Sep 12, 2018
• Grant date: Aug 30, 2022
• Expiry date: May 21, 2039

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2259/4566
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The use of porous crystalline solids constituted of a metal-organic framework (MOF) for the capture of polar volatile organic compounds (VOCs). In particular, the MOF of interest are material having an average pores sizes of 0.4 to 0.6 nm and an hydrophobic core formed by a metal oxide and/or hydroxide network connected by linkers, the linkers being selected from the group including (i) C6-C24 aromatic polycarboxylate linkers, such as benzyl or naphtyl di-, tri- or tetracarboxylate, and (ii) C6-C16 polycarboxylate aliphatic linkers; the linkers bearing or not apolar fluorinated groups, e.g. —(CF2)n—CF3 groups, n being a integer from 0 to 5, preferably 0 ou 3, and/or apolar C1-C20 preferably C1-C4 alkyl groups, e.g. —CH3 or —CH2—CH3, grafted directly to the linkers and pointing within the pores of the MOF. The MOF solids used in the present invention can be used for the purification of air, for example for the capture of polar VOCs like acetic acid and aldehydes from indoor air in cars, museums and archives, much more efficiently than common adsorbents, particularly in presence of above normal levels of humidity. They can in particular be used for the preservation of cultural herita…