Process for the production of sodium percarbonate

US6228342A · kind A · utility

Assignee

• Solvay Interox GmbH · GB

Inventors

• Manfred Mathes · Homborn, DE
• Werner Doetsch · Homborn, DE

Key dates

• Filing date: Feb 6, 1998
• Grant date: May 8, 2001
• Expiry date: Feb 6, 2018

Classification

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

Abstract

A flexible process for production of homogeneous sodium precarbonate particles or granules according to which a reaction slurry with an average to high solids content is prepared initially from an aqueous hydrogen peroxide solution of up to maximum 50% by weight and solid soda, this reaction slurry, which optionally may be finely ground by wet comminution, being subsequently subjected immediately to short-term drying, preferably spray drying, and, optionally, granulation. The process enables production, in an efficient manner, of essentially homogeneous sodium percarbonate particles or granules with variable active oxygen contents of 10 to 14.5% by weight and grain sizes and bulk densities which are variable within wide ranges.