Organophosphines
AssigneeRhodia Consumer Specialties Limited
InventorsGary Woodward, Ranbir Singh Padda, Christian Thomas Regius
Life of this patent
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Abstract
Organophosphines of the formula (R)aP(H)3−a( where R is C1-C20 alkyl, alkenyl, alkaryl or styryl and a is 1, 2, or 3) are produced by (i) reacting a tris(hydroxyorgano)phosphine (THP) with an organic halogen containing compound; (ii) reacting the product of (i) with a base; (iii) removing aldehydes from the product of (ii) and adding an organic phase, followed by distillation or phase-separation to obtain the desired product.
Claims16
A method for the production of a primary, secondary or tertiary phosphine having the formula (R)aP(H)3−a where R is an organic group and a is 1, 2 or 3, wherein said method comprises the following stages:
- (i) reacting a tris(hydroxyorgano)phosphine (THP) with an organic halogen-containing compound, of formula R(X)n where:
- R is selected from the group consisting of C1 to C20 alkyl, alkenyl, alkynyl, alkaryl and styryl;
- X represents a halogen atom;
- n is a whole number of from 1 to 4 and said R includes at least one aliphatic carbon atom adjacent each said halogen atom;
- said stage (i) being carried out at a temperature of less than about 90° C. and at ambient pressure and in the presence of a solvent;
- (ii) reacting the product of stage (i) with a base;
- (iii) thereafter adding, to the resulting product of stage (ii), sufficient of an acid to maintain a pH of 6 to 8, removing aldehydes from said product of stage (ii) and adding to said product a material to form a discrete organic phase, followed by distilling or phase-separation to obtain said primary, secondary or tertiary phosphine.
Dependencies are inferred from the claim text.