Patent ID: 8608824

Claim:
An integrated process, wherein pure carbonyl iron powder (CIP) is prepared by decomposition of pure iron pentacarbonyl (IPC) in a plant A, carbon monoxide (CO) liberated in the decomposition of the IPC is used in plant A for the preparation of further IPC from iron or is fed to an associated plant B in which synthesis gas is prepared or is fed to an associated plant C in which hydrocarbons are prepared from synthesis gas, the CIP prepared in plant A is used as catalyst or catalyst component in an associated plant C in which hydrocarbons are prepared from synthesis gas from plant B, exhausted catalyst obtained in plant C is used as additional iron source for the preparation of CIP in plant A and the CIP obtained in plant A after the decomposition of IPC is treated with hydrogen before being used further, where the hydrogen used comes from an associated plant B in which synthesis gas is prepared.