Abstract: Novel ortho alkoxy substituted phenyl oxime compounds which are useful for selectively separating and recovering palladium from aqueous compositions and mixtures containing palladium and other metals.

Abstract: Allylphosphonate diesters are prepared by reacting an appropriate allyl halide or alcohol with an appropriate phosphite compound in the presence of a catalytically effective amount of a phosphinated d.sup.8 transition metal catalyst.

Abstract: Allyl phosphonate diesters are converted to vinyl phosphonate diesters by isomerization with a catalytically effective amount of one or more metal hydroxide catalysts.

Abstract: The present invention is directed to a method of separating and purifying palladium which is present in a solution with at least one other platinum group metal by adjusting the pH of the solution to from about 0 to 5, contacting the acidified solution with an ortho alkoxy substituted phenyl oxime of the formula: ##STR1## or a composition comprising of one or more of said compounds dissolved in an organic solvent, wherein:n is an integer of from 1 to 4;R.sub.1 is alkyl, cycloalkyl, or aralkyl; andR.sub.2 is nitro, halogen, hydrogen or substituted ro unsubstituted alkyl, alkoxy, aryloxy, cycloalkyl, aryl, aralkyl or alkaryl, wherein permissible substituents are those which are inert to process conditions; andR.sub.

Abstract: Allylphosphonate diesters are converted to vinyl phosphonate diesters by isomerization with a catalytic amount of a ruthenium catalyst. Vinyl phosphonate derivatives are produced directly from an organo pentavalent phosphorus compound. In a particular reaction conversion of allylic phosphonate diesters to vinylic phosphonate diesters is accomplished by the transition metal mediated isomerization of the alkylphosphonate derivatives with tetrakis(triphenylphosphine)dihydrido ruthenium(II).

Abstract: Novel .beta.-oximinoalkylphosphonic acid ester derivatives of general formula B are prepared from the corresponding .alpha.-halo oxime A: ##STR1## wherein R.sup.1 is a substituent selected from the group consisting of H and C.sub.1 -C.sub.20 alkyl, cycloalkyl and aryl substituents;R.sup.2 is a substituent selected from the group consisting of H and C.sub.1 to C.sub.20 linear alkyl and aryl substituents;R.sup.3 is a substituent selected from the group consisting of H and C.sub.1 to C.sub.20 alkyl, cycloalkyl, 1-alkoxy alkyl, aryl, acyl, N-substituted carbamoyl, N,N-disubstituted carbamoyl and nitrogen- , oxygen- , sulfur- , and phosphorus-containing heterocyclic substituents;R.sup.4 is an alkyl substituent of C.sub.1 to C.sub.20 aryl; andX is a substituent selected from the group consisting of Cl, Br, I.In a specific reaction, the .alpha.-halo oxime derivative is dissolved in an excess of trialkyl phosphite, greater than 3 molar equivalents is preferred. The preference for the .alpha.