Methods for the regeneration of deactivated phosphomolybdic acid based catalysts

A method for the regeneration of deactivated phosphomolybdic acid based catalysts comprising the steps of:

• imbibing a volatile solvent within the pore structure of said deactivated catalyst so as to form a fluid phase within the pore structure;
• adding hydrochloric acid to said fluid phase;
• adding a volatile base to said fluid phase to form a precipitate;
• and
• drying and calcining said precipitate to yield a regenerated catalyst.

A method for the regeneration of deactivated phosphomolybdic acid based catalysts comprising the steps of:

• imbibing a substantially anhydrous alkyl alcohol having from one to about five carbon atoms within the pore structure of said deactivated catalyst so as to form a fluid phase within the pore structure;
• adding a volatile acid to said fluid phase;
• adding a volatile base to said fluid phase to form a precipitate;
• and
• drying and calcining said precipitate to yield a regenerated catalyst.

A method for the regeneration of phosphomolybdic acid based catalysts comprising the steps of:

• imbibing an aqueous volatile base within the pore structure of said deactivated catalyst so as to form a fluid phase within the pore structure;
• adding a volatile acid, selected from the group consisting of hydrochloric, hydrobromic, hydroiodic, organic carboxylic acids and halogenated carboxylic acids having from 1 to about 4 carbon atoms, to said fluid phase so as to form a precipitate;
• and
• drying and calcining said precipitate to yield a regenerated catalyst.

A method for the regeneration of deactivated phosphomolybdic acid based catalysts comprising the steps of:

• imbibing a volatile solvent within the pore structure of said deactivated catalyst so as to form a fluid phase within the pore structure;
• adding a volatile acid, selected from the group consisting of hydrochloric, hydrobromic, hydroiodic, organic carboxylic acids and halogenated carboxylic acids having from 1 to about 4 carbon atoms, to said fluid phase
• adding a volatile base to said fluid phase to form a precipitate;
• and
• drying and calcining said precipitate to yield a regenerated catalyst.