Preparation of a phosphoric acid-carbon catalyst

Claim 1

A PROCESS FOR THE MANUFACTURE OF A SOLID CATALYST WHICH CONSISTS OF MIXING FROM ABOUT 25% TO ABOUT 50% BY WEIGHT OF A SUBSTANTIALLY DRY FINELY DIVIDED ORGANIC MATERIAL OF VEGETABLE ORIGIN COMPRISING ESSENTIALLY CARBON, HYDROGEN AND OXYGEN AND FROM ABOUT 75% TO ABOUT 50% BY WEIGHT OF A PHOSPHORIC ACID AT A TEMPERATURE OF FROM ABOUT 100* F. TO ABOUT 160* F., CONTINUING SAID MIXING AND HEATING TO FORM A CHARRED COMPOSITE OF THE ORGANIC MATERIAL AND PHOSPHORIC ACID, THEREAFTER MIXING SAID CHARRED COMPOSITE WITH A SUFFICIENT AMOUNT OF WATER TO FORM A PLASTIC MIXTURE AND FORMING THE PLASTIC MIXTURE INTO SHAPED PARTICLES, DRYING THE SHAPED PARTICLES AT A TEMPERATURE OF FROM ABOUT 300* F. TO ABOUT 400* F., THEREAFTER CALCINING THE DRIED PARTICLES AT A TEMPERATURE OF FROM ABOUT 400* F. TO ABOUT 1200* F. FOR A TIME SUCH AS TO RETAIN IN EXCESS OF 25% BY WEIGHT OF PHOSPHORIC ACID IN SAID PARTICLES, AND RECOVERING THE THUS CALCINED PARTICLES AS THE PRODUCT OF THE PROCESS.