Method of producing vanillin

Claim 1

A METHOD OF PRODUCING OXIDIZATION PRODUCTS INCLUDING THE CALCIUM DERIVATIVE OF VANILLIN FROM LIGNOSULFONIC ACID COMPOUNDS IN AN ALKALINE AQUEOUS MEDIUM CONTAINING LIME AS THE ACTIVE ALKALI IN AN AMOUNT SUFFICIENT TO MAINTAIN THE PH OF THE REACTION MIXTURE, DETERMINED ON A SAMPLE WITHDRAWN FROM THE REACTION ZONE AND COOLED TO ROOM TEMPERATURE IN THE RANGE NOT LESS THAN 12 TO NOT MORE THAN THAT OF A SATURATED SOLUTION OF LIME IN THE SAME MIXTURE, WHICH COMPRISES INTRODUCING SAID COMPOUNDS INTO A REACTION ZONE, HEATING THE REACTION MIXTURE TO A TEMPERATURE NOT LESS THAN 120* C., NOR MORE THAN 200* C., MAINTAINING SAID ZONE UNDER SUPERATMOSPHERIC PRESSURE, CONTINUOUSLY PASSING A GAS CONTAINING FREE OXYGEN IN FINELY DISPERSED FORM THROUGH SAID REACTION ZONE, CONTINUOUSLY PASSING A GAS CONTAINING GAS, THE RATE OF ADDITION AND REMOVAL RESIDUAL BEING SUCH AS TO MAINTAIN A PARTIAL PRESSURE OF OXYGEN IN SAID ZONE OF LESS THAN 2/ LB. PER SQUARE INCH, THE TIME OF SAID REACTION BEING LESS THAN FOUR HOURS, THE REACTANTS BEING CONTINUOUSLY INTRODUCED INTO, AND THE REACTANT PRODUCTS BEING CONTINUOUSLY REMOVED FROM, THE AGITATED REACTION MIXTURE.

Claim 2

A METHOD OF PRODUCING OXIDIZATION PRODUCTS INCLUDING THE CALCIUM DERIVATIVE OF VANILLIN FROM LIGNOSULFONIC ACID COMPOUNDS IN AN ALKALINE AQUEOUS MEDIUM CONTAINING LIME AS THE ACTIVE ALKALI IN AN AMOUNT SUFFICIENT TO MAINTAIN THE PH OF THE REACTION MIXTURE, DETERMINED ON A SAMPLE WITHDRAWN FROM THE REACTION ZONE AND COOLED TO ROOM TEMPERATURE IN THE RANGE NOT LESS THAN 12 TO NOT MORE THAN THAT OF A SATURATED SOLUTION OF LIME IN THE SAME MIXTURE, WHICH COMPRISES INTRODUCING SAID COMPOUNDS INTO A REACTION ZONE, HEATING THE REACTION MIXTURE TO A TEMPERATURE NOT LESS THAN 120* C., NOR MORE THAN 200* C., MAINTAINING SAID ZONE UNDER SUPERATMOSPHERIC PRESSURE, CONTINUOUSLY PASSING A GAS CONTAINING FREE OXYGEN IN FINELY DISPERSED FORM THROUGH SAID REACTION ZONE, CONTINUOUSLY PASSING A GAS CONTAINING GAS, THE RATE OF ADDITION AND REMOVAL RESIDUAL BEING SUCH AS TO MAINTAIN A PARTIAL PRESSURE OF OXYGEN IN SAID ZONE OF LESS THAN 2/ LB. PER SQUARE INCH, THE TIME OF SAID REACTION BEING LESS THAN FOUR HOURS, THE REACTANTS BEING CONTINUOUSLY INTRODUCED INTO, AND THE REACTANT PRODUCTS BEING CONTINUOUSLY REMOVED FROM, THE AGITATED REACTION MIXTURE.