The invention provides a method for separating one or more triorganophosphite components from a crude phosphite mixture containing acidic hydrolysis products, the method comprising:contacting said crude phosphite mixture with a basic additive to produce a second mixture comprising a first phase and a second phase, wherein said first phase comprises the basic additive and one or more components independently selected from the group consisting of (R2O)(R3O)POH, (R1O)(HO)PO(H) and H3PO3, wherein R1, R2 and R3 are independently selected from the group consisting of C1 to C18 alkyl, C6 to C18 aryl and hydroxyaryl, and C3 to C18 cycloalkyl and hydroxyalkyl radicals, and wherein R2 and R3 can optionally be connected to each other directly by a chemical bond or through an intermediate divalent group R9; andsaid second phase comprises one or more triorganophosphite components independently selected from the group consisting of (R4O)(R5O)P(OR6) and ((R7O)(R8O)PO)nA, wherein R4, R5, R6, R7 and R8 are independently selected from the group consisting of C1 to C18 alkyl, C6 to C18 aryl and C3 to C18 cycloalkyl radicals, wherein each of R4, R5 and R6 can optionally be connected to one or both of the other two directly by a chemical bond or through an intermediate divalent group R10, wherein R7 and R8 can optionally be connected to each other directly by a chemical bond or through an intermediate divalent group R11, wherein A is an optionally substituted or unsubstituted aliphatic, aromatic or heteroaromatic radical, and wherein n is an integer greater than 1; andR9, R10, and R11 are independently selected from the group consisting of —O—, —S—, and —CH(R12)—, wherein R12 is selected from the group consisting of H, C6 to C18 aryl, and C1 to C18 alkyl.