Method and pulverisation head, associated method and apparatus to manufacture a product in powder form

US9352339B2 · kind B2 · utility

Assignee

• SPRAINNOV · FR

Inventors

• Pierre Buisson · Lagord, FR
• Alain Grizeau · La Rochelle, FR
• Fabrice Richard · Niort, FR
• Jean-Marc Chicheportiche · Paris, FR
• Jean Pierre Renaudeaux · Chevreuse, FR
• Jean-Baptiste Zainoun · Le Puy-en-Velay, FR

Key dates

• Filing date: Mar 25, 2009
• Grant date: May 31, 2016
• Expiry date: Sep 1, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05B7/149
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A pulverization head of an apparatus includes a motor whose vertical hollow shaft is integrally linked, at its lower end, to a centrifugal ejection disc. The substance to be pulverized, coming from a tank via a proportioning pump, crosses the hollow shaft to be spread in a thin layer on the lower surface of the disc forming the centrifugal ejection face. Elements are designed to vibrate the peripheral edge of the disc and control the pulverization of the substance. A fan and a distributor produce a treatment gas flow which meets and draws droplets towards a collection zone, solidifying them by drying or freezing. Typically, the substance is a mixture of at least one active ingredient and a microencapsulation constituent. For use to obtain very fine and/or very homogeneous particle size, to manufacture powders for food processing, nutritional, cosmetic, pharmaceutical and fine chemical applications. The head is useful to produce aerosols.