Method of purifying borohydrides of the alkali metals

• US 2,542,746 A
• Filed: 11/14/1949
• Issued: 02/20/1951
• Est. Priority Date: 11/14/1949
• Status: Expired due to Term

• Current Assignee: Gibb Jr Thomas R P, Mario D. Banus
• Original Assignee: Gibb Jr Thomas R P, Mario D. Banus
• Inventors: Banus, Mario D., GIBB JR THOMAS R P
• Application Number:
  US03/127,238
• Time in Patent Office: 463 Days
• US Class Current: 423/288
• CPC Class Codes: C01B 6/00 Hydrides of metals including fully or partially hydrided metals, alloys or intermetallic compounds use of some thereof for reversible sorption of hydrogen C01B3/0005, C01B3/508; Compounds containing at least one metal-hydrogen bond, e.g. (GeH3)2S, SiH GeH; Monoborane or diborane; Addition complexes thereof higher hydrides of boron, substituted hydrides of boron C01B35/00

Claims

1. IN A METHOD OF PREPARING SODIUM BOROHYDRIDE WHICH COMPRISES REACTING AN ALKYL BORATE WITH SODIUM HYDRIDE TO OBTAIN A REACTION PRODUCT COMPRISING SODIUM BOROHYDRIDE AND SODIUM ALKOXIDE, DISSOLVING THE SODIUM BOROHYDRIDE WITH A SOLVENT THEREFOR WHICH IS STABLE IN THE PRESENCE OF WATER AND WHICH IS A NON-SOLVENT FOR THE SODIUM ALKOXIDE, AND SEPARATING THE SOLUTION FROM THE INSOLUBLE MATERIAL, THE IMPROVEMENT WHICH COMPRISES INTRODUCING INTO THE SOLUTION OF THE BOROHYDRIDE AN AMOUNT OF WATER EFFECTIVE TO REACT WITH A PORTION OF THE IMPURITIES IN THE BOROHYDRIDE AND FORM A COMPOUND INSOLUBLE IN THE SOLUTION.