a novel design of filters for removing iron rust particulates and other polymeric sludge from refinery and chemical process streams that are paramagnetic in nature is provided . the performance of these filters is greatly enhanced by the presence of the magnetic field induced by magnets . basically , the filter comprises a high - pressure vessel with means to support the plurality of magnets in the form of bars or plates that are encased in stainless steel tubes or columns . filters with various configurations are disclosed for accommodating the removal of contaminants from the process streams of different industries , with high efficiency for contaminants removal , simple construction , low operational and maintenance costs , and low hazardous operation .