Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus esters
Patent
1995-01-19
1996-07-02
McKane, Joseph K.
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus esters
558 90, C07F 908
Patent
active
055324010
ABSTRACT:
An improved process for the preparation of tris(nonylphenyl) phosphite is described which includes the steps of combining at least a 4 weight percent excess of nonylphenol (preferably 8 weight percent excess) with PCl.sub.3 with agitation and heating sufficient to liberate HCl formed during the synthetic reaction as a by-product and removing the excess nonylphenol from the tris(nonylphenyl) phosphite by thin film distillation to reduce the residual chloride level to 90 ppm or less, an acid number of 0.1 or less and a nonylphenol content after stripping of 0.1 weight percent or less. The temperature of the reaction was from room temperature to 130.degree. C., and the temperature of the evaporator which removes the excess nonylphenol is from 100.degree. C. to 350.degree. C., preferably from 150.degree. C. to 250.degree. C., under a system vacuum of from 0.01 mm Hg to 5 mm Hg.
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Clark Daniel L.
Debevec John C.
Larke Carroll W.
Slater Charles N.
Stevenson Donald R.
Dover Chemical Corporation
McKane Joseph K.
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