EP 4291527 A1 20231220 - GRAPHENE PRODUCTION METHOD
Title (en)
GRAPHENE PRODUCTION METHOD
Title (de)
GRAPHENHERSTELLUNGSVERFAHREN
Title (fr)
MÉTHODE DE PRODUCTION DE GRAPHÈNE
Publication
Application
Priority
- GB 202101925 A 20210211
- GB 2022050373 W 20220211
Abstract (en)
[origin: GB2603861A] A method whereby a mixture of expanded graphite and a liquid is subjected to high-shear mixing in order to exfoliate the expanded graphite and produce graphene. The exfoliation may be performed for between 8 to 24 hours by in-line, rotor-stator assembly 3 rotating at 6000-9000 RPM. The ratio of expanded graphite to liquid may be from 0.01:1 to 0.1:1. The liquid may comprise water and/or an organic solvent and the mixture may contain a surfactant. Graphene production may be performed in a continuous or semi-continuous process. The expanded graphite may be produced by intercalating graphite with an intercalating compound followed by thermal treatment. The expanded graphite may have a lateral size of between 100-500 microns. The production of the expanded graphite may use microwave radiation, ball milling or fluidised bed air milling.
IPC 8 full level
C01B 32/182 (2017.01); C01B 32/192 (2017.01)
CPC (source: EP GB)
C01B 32/182 (2017.07 - EP); C01B 32/19 (2017.07 - GB); C01B 32/192 (2017.07 - EP); C01B 32/225 (2017.07 - GB)
Citation (search report)
See references of WO 2022172021A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
GB 202201804 D0 20220330; GB 2603861 A 20220817; EP 4291527 A1 20231220; GB 202101925 D0 20210331; WO 2022172021 A1 20220818
DOCDB simple family (application)
GB 202201804 A 20220211; EP 22705562 A 20220211; GB 202101925 A 20210211; GB 2022050373 W 20220211