Preparation of cinnamaldehyde

Claim 1

A METHOD FOR PREPARING CINNAMALDEHYDE WHICH CONSISTS IN HEATING A MIXTURE OF BENZALDEHYDE AND AQUEOUS ALKALI SOLUTION OF A CONCENTRATION OF FROM 0.23 TO 0.6% BY WEIGHT AT A TEMPERATURE OF FROM 60 TO 80* C. WHILE GRADULLY ADDING THERETO ACETALDEHYDE OVER A PERIOD OF TIME OF THERETO ACETALDEHYDE OVER A PERIOD OF TIME OF FROM ONE HOUR TO TWO HOURS, THE AMOUNT OF BENZALDEHYDE EXCEEDING THAT MOLECULARLY EQUIVALENT TO THE TOTAL ACETALDEHYDE EMPLOYED, THEREAFTER HEATING THE RESULTING MIXTURE AT THE SAME TEMPERATURE FOR A PERIOD OF TIME OF FROM THIRTY MINUTES TO THREE HOURS, AGITATING THE MIXTURE THROUGHOUT SAID HEATING STEPS, MAINTAINING THE PH OF THE REACTION MIXTURE AT FROM 8.0 TO 12 THROUGHOUT SAID HEATING STEPS, MAINTAINING A MOLECULAR EXCESS OF BENZALDEHYDE OVER ACETALDEHYDE IN THE REACTION MIXTURE THROUGHOUT SAID HEATING STEPS, AND RECOVERING CINNAMALDEHYDE FROM THE RESULTING REACTION MIXTURE.

Claim 2

A METHOD FOR PREPARING CINNAMALDEHYDE WHICH CONSISTS IN HEATING A MIXTURE OF BENZALDEHYDE AND AQUEOUS ALKALI SOLUTION OF A CONCENTRATION OF FROM 0.23 TO 0.6% BY WEIGHT AT A TEMPERATURE OF FROM 60 TO 80* C. WHILE GRADULLY ADDING THERETO ACETALDEHYDE OVER A PERIOD OF TIME OF THERETO ACETALDEHYDE OVER A PERIOD OF TIME OF FROM ONE HOUR TO TWO HOURS, THE AMOUNT OF BENZALDEHYDE EXCEEDING THAT MOLECULARLY EQUIVALENT TO THE TOTAL ACETALDEHYDE EMPLOYED, THEREAFTER HEATING THE RESULTING MIXTURE AT THE SAME TEMPERATURE FOR A PERIOD OF TIME OF FROM THIRTY MINUTES TO THREE HOURS, AGITATING THE MIXTURE THROUGHOUT SAID HEATING STEPS, MAINTAINING THE PH OF THE REACTION MIXTURE AT FROM 8.0 TO 12 THROUGHOUT SAID HEATING STEPS, MAINTAINING A MOLECULAR EXCESS OF BENZALDEHYDE OVER ACETALDEHYDE IN THE REACTION MIXTURE THROUGHOUT SAID HEATING STEPS, AND RECOVERING CINNAMALDEHYDE FROM THE RESULTING REACTION MIXTURE.