Solvay Fluor Gmbh

Solvay Flour Gmbh

Jens Olschimke

Carsten Brosch

Martin Bomkamp

Andreas Grossmann

Saskia Braukmüller

Fluoroalkyl alkyl carbonates and fluorosubstituted carbamates which are suitable as additives or solvents in lithium ion batteries are prepared from fluoroalkyl fluoroformates and the respective alcohol or amine. Methanol is the preferred alcohol, dimethylamine and diethylamine are preferred amines. Fluoromethyl methyl carbonate is the preferred compound to be produced. Fluoroalkyl fluoroformates can be prepared from aldehydes and carbonyl fluoride.

Process for the preparation of fluoroalkyl (fluoro)alkyl carbonates and carbamates

A container containing a fluorinated organic carbonate and a gas atmosphere which contains a cover gas selected from the group consisting of a noble gas, e.g., argon, xenon, a gaseous fluorinated aliphatic carbon which is heavier than air and does not interfere with the fluorinated organic compound, SF, and any mixture thereof. Fluorinated organic carbonates are highly suitable as solvents or additives for solvent in Li ion batteries and consequently, must be kept in a very pure state even during expanded times of storage. The argon or xenon gas atmosphere prevents the intrusion of air or moisture even if the container is opened and the liquid handled in an environment of common air. A method of storing one or more fluorinated organic carbonates in a safe manner.

Container containing fluorinated organic carbonates

Gas mixtures containing HF, HCl or HBr and other constituents, in particular gas mixtures containing carboxylic acid fluorides, C(O)For phosphorus pentafluoride and HCl and possibly HF, can be fractionated by means of ionic liquids.

Method for separating gas

Gas mixtures which comprise acids like HF, HCl or HBr and other constituents, especially gas mixtures which comprise or consist of carboxylic acid fluorides, C(O)For phosphorous pentafluoride and HCl and optionally HF, can be separated by ionic liquids. The process is performed reversibly. Ionic liquids are applied the anion of which corresponds to a stronger acid than the acid to be removed. Highly purified products, for example, highly purified carbonyl fluoride can be obtained.

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Hannover, Germany

Jens Olschimke