Drum drying process for recovering concentrated sodium hydrosulfide

• US 3,145,130 A
• Filed: 09/21/1961
• Issued: 08/18/1964
• Est. Priority Date: 09/27/1960
• Status: Expired due to Term

• Current Assignee: Ewald Wygasch, Helmut Zahn, Werner Huehn
• Original Assignee: Ewald Wygasch, Helmut Zahn, Werner Huehn
• Inventors: EWALD WYGASCH, HELMUT ZAHN, Huehn, Werner
• Application Number:
  US04/139,597
• Time in Patent Office: 1,062 Days
• US Class Current: 159/49
• CPC Class Codes: C01B 17/32 Hydrosulfides of sodium or potassium
• CPC Class Codes: C01P 2006/20 Powder free flowing behaviour
• CPC Class Codes: C01P 2006/80 Compositional purity
• CPC Class Codes: Y10S 159/23 Cooling

Claims