Specialty Operations France

Rhodia Operations

Rodolphe Sapey-triomphe

Lars Fischer

David A Vanzin

Cédric Humblot

The present invention relates to new lightly colored prills of hydroquinone. More particularly, the invention provides a new method for preparing said lightly colored prills of hydroquinone. The invention also relates to said prills of hydroquinone obtained by said new method.

Prills of hydroquinone and method for obtaining the same

The present invention relates to a novel solid presentation form of a phenol derivative, characterized by a rounded portion and a flat portion. The compositions thus obtained have advantageous properties suitable for the storage, handling and flow of the compounds. The present invention also relates to a process for preparing these solids, and to the use thereof, in particular in the polymer and agri-food industries.

Solid presentation form of at least one phenol derivative and process for obtaining same

The invention relates to a novel solid form of diphenol compound. A process for the preparation of diphenol prills having a spherical shape is disclosed. Said process comprising providing a molten composition comprising from 50 to 100 wt. % of a diphenol compound or a mixture of at least two diphenol compounds, and less than 0.1 wt. % of water; forcing said molten composition through at least one droplet generator means to form droplets; and cooling said droplets to form solid diphenol prills. The diphenol prills obtainable by said process are also one subject-matter of the invention.

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Sérézin-du-Rhône, France

Rodolphe Sapey-triomphe