The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 2015
Filed:
Feb. 10, 2014
Saudi Basic Industries Corporation, Riyadh, SA;
Linde Ag, Munich, DE;
Uwe Rosenthal, Lambrechtshagen, 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 Müller, Munich, DE;
Abdullah Mohammad Al-Qahtani, Riyadh, SA;
Mohammed H. Al-Hazmi, Riyadh, SA;
Shahid Majeed Azam, Riyadh, SA;
SAUDI BASIC INDUSTRIES CORPORATION, Riyadh, SA;
LINDE AG, , DE;
Abstract
A method for purifying a crude PNPNH compound of the general structureRRP—N(R)—P(R)—N(R)—Hwherein R, R, R, Rand Rare independently halogen, amino, trimethylsilyl, C-C-alkyl, substituted C-C-alkyl, C-C-aryl and substituted C-C-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 C-Calcohol 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 C-Calcohol or a mixture thereof, (ii) separating the PNPNH compound and optionally drying thereof.