Use of a nozzle for manufacturing sodium percarbonate

US8092772B2 · kind B2 · utility

Assignee

• Kemira Kemi AB · SE

Inventors

• Uwe Weiss · Amberg, DE
• Michael Jacob · Munich, DE
• Elin Sohlberg · Helsingborg, SE
• Ajse Sandqvist · Helsingborg, SE
• Fredrik Lauritzson · Sa`sa`, SY

Key dates

• Filing date: Oct 9, 2008
• Grant date: Jan 10, 2012
• Expiry date: Oct 9, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B15/103
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention relates to a use of a two-way spray nozzle (1) with protective gas for manufacturing granular sodium percarbonate, said nozzle comprising a central tube (2) having an outlet for an aqueous hydrogen peroxide solution, an inner jacket tube (3) arranged coaxially around the central tube, and having an outlet for aqueous sodium carbonate solution, an outer jacket tube (4) arranged coaxially around the central tube and inner jacket tube, and having an outlet for a protective gas, a threaded ring slot (5) arranged around the central tube at a distance from the outlet of the central tube, wherein the threads of the ring slot are arranged at an angle α with respect of the direction of the longitudinal axis (12) of the central tube, and in which said protective gas is used at a pressure of less than 0.7 bar. The present invention also relates to a method for manufacturing granular sodium percarbonate.