Process for producing liquid polysilanes and isomer enriched higher silanes

US11097953B2 · kind B2 · utility

Assignees

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR
• American Air Liquide, Inc. · US

Inventors

• Grigory Nikiforov · Bound Brook, US
• Guillaume Husson · Newark, US
• Gennadiy Itov · Flemington, US
• Yang Wang · Shanghai, CN

Key dates

• Filing date: Oct 11, 2018
• Grant date: Aug 24, 2021
• Expiry date: Feb 20, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Synthesis of silanes with more than three silicon atoms are disclosed (i.e., (SinH(2n+2) with n=4-100). More particularly, the disclosed synthesis methods tune and optimize the isomer ratio by selection of process parameters such as temperature, residence time, and the relative amount of starting compounds, as well as selection of proper catalyst. The disclosed synthesis methods allow facile preparation of silanes containing more than three silicon atoms and particularly, the silanes containing preferably one major isomer. The pure isomers and isomer enriched mixtures are prepared by catalytic transformation of silane (SiH4), disilane (Si2H6), trisilane (Si3H8), and mixtures thereof.