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:
Jan. 02, 1996
Filed:
Aug. 03, 1994
Peter Lechtken, Frankenthal, DE;
Friedrich Sauer, Obersuelzen, DE;
Matthias Fankhaenel, Ludwigshafen, DE;
Dieter Hermeling, Frankenthal, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for isolating triphenylphosphine (TPP) from a triphenylphosphine/aluminum chloride complex dissolved in chlorobenzene by decomplexation, hydrolysis and extraction using water and subsequent separation of the liquid/liquid dispersion, which is composed of a TPP-containing chlorobenzene phase and of an containing Al and Cl compounds aqueous phase, into a TPP-containing chlorobenzene phase and into a TPP-free, aqueous phase, containing Al and Cl compounds, wherein water is dispersed in the chlorobenzene phase in a ratio of 0.6-0.95 kg of water per kg of chlorobenzene solution in a 1st mixing apparatus in such a way that the temperature resulting from the hydrolysis is in the range from 60.degree. to 90.degree. C., the dispersion being carried out with residence times of 5-30 minutes and energy densities of 2-10 kW/m.sup.3, a second dispersion is carried out in a 2nd mixing apparatus with residence times of 5-60 minutes and energy densities of 0.05-0.5 kW/m.sup.3, and the heavier TPP-containing chlorobenzene phase is separated from the lighter TPP-free, aqueous phase containing Al and Cl compounds in a phase separator.