Preparation of an iron-silica gel fischer-tropsch catalyst

Claim 1

METHOD FOR PRODUCTION OF IRON CATALYSTS FOR THE CATALYTIC CARBON MONOXIDE HYDROGENATION WHICH COMPRISES ADDING TO A SOLUTION OF IRON NITRATE CONVENTIONALLY USED FOR THE PREPARATION OF CARBON MONOXIDE HYDROGENATION CATALYST AN IRON HYDROXIDE PRECIPITANT IN AMOUNT SUFFICIENT TO OBTAIN A PH ENDPOINT OF FROM ABOUT 6.8 TO 7.2 WHILE CONTINUOUSLY STIRRING, SEPARATING THE PRECIPITATE, WASHING THE SAME TO REDUCE ITS ALKALI CONTENTS TO A MAXIMUM OF 0.5 PART BY WEIGHT OF K2O FOR EACH 100 PARTS BY WEIGHT OF IRON CONTENT IN SAID PRECIPITATE, ADDING FURTHER AMOUNTS OF WATER TO SAID SLURRY TO THEREBY OBTAIN A SUSPENSION OF SAID PRECIPITATE, ADDING AN ALKALI METAL WATERGLASS SOLUTION TO SAID SUSPENSION IN AMOUNT SUFFICIENT TO YIELD 20 TO 25 PARTS BY WEIGHT OF SI02 FOR EVERY 100 PARTS BY WEIGHT OF IRON CONTAINED IN SAID SUSPENSION, THEREAFTER ADDING NITRIC ACID IN AMOUNT SUFFICIENT TO YIELD FOR THE RESIDUE AFTER FILTRATION THEREOF K2O TO SIO2 PROPORTION OF ABOUT 1:4 TO 1:5, THEREAFTER DRYING THE FILTER RESIDUE AND MOULDING THE WHOLE RESIDUE INTO PARTICLES, REDUCING THE MOULDED PARTICLED MATERIAL WITH A REDUCING GAS AT A VELOCITY OF ABOUT 1 TO 2 METERS PER SECOND AND A TEMPERATURE OF ABOUT 200 TO 350* C. UNTIL SAID MATERIAL YIELDS AT LEAST 30 TO 50% TO ITS IRON CONTENT IN THE FORM OF FREE IRON.