Method for purifying a crude PNPNH compound

US9206207B2 · kind B2 · utility

Assignees

• SAUDI BASIC INDUSTRIES CORPORATION · SA
• Linde GmbH · DE

Inventors

• Uwe Rosenthal · Munich, DE
• Bernd H. Müller · Rostock, DE
• Normen Peulecke · Rostock, DE
• Marco Harff · Munich, DE
• Anina Wöhl · Munich, DE
• Andreas Meiswinkel · Munich, DE
• Heinz Bölt · Wolfratshausen, DE
• Wolfgang Muller · Königsfeld, DE
• Abdullah Mohammad Al-Qahtani · Riyadh, SA
• Mohammed H. Al-Hazmi · Riyadh, SA
• Shahid Azam · Riyadh, SA

Key dates

• Filing date: Feb 10, 2014
• Grant date: Dec 8, 2015
• Expiry date: Apr 12, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2531/62
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A method for purifying a crude PNPNH compound of the general structureR1R2P—N(R3)—P(R4)—N(R5)—Hwherein R1, R2, R3, R4 and R5 are independently halogen, amino, trimethylsilyl, C1-C10-alkyl, substituted C1-C10-alkyl, C6-C20-aryl and substituted C6-C20-aryl, or any cyclic derivative wherein at least one of the P or N atoms of the PNPN—H structure is a member of a ring system, the ring system being formed from one or more constituent compounds of the PNPNH-structure by substitution, the method comprising the steps: A. a) dissolving the crude PNPNH-compound in a C1-C10 alcohol or mixture thereof under heating; b) cooling the solution obtained in step a), c) precipitating the PNPNH compound, separating and optionally drying, or B. (i) washing the crude PNPNH compound with C1-C10 alcohol or a mixture thereof, (ii) separating the PNPNH compound and optionally drying thereof.