In a mist collector wherein a mist-laden gas stream is directed into a housing and through a multi pocket filter assembly to separate liquid components from the gas stream as the gas stream moves upwardly through the housing, the filter assembly including a plurality of filter envelopes scanning a gas stream flow path, the filter envelopes having first upstream open ends and second downstream closed ends, with the open ends located below the closed ends, and the housing having a doorway, the improvement comprising: first means for securing the filter assembly to the housing on the inside thereof at the first open ends of the filter envelopes, said first means located inside the housing; and second means for moveably mounting the closed ends of the filter envelopes to the housing on the inside thereof, said second means being slidable through the doorway to a position at least partially outside of the housing, thereby to facilitate connecting and disconnecting of the filter assembly at the closed ends of the filter envelopes, outside the housing. During machining operations on a workpiece, it is common to bathe the point of contact between the workpiece and the bit, tool or blade of a machine tool with a liquid stream to lubricate and reduce heat buildup. For economic and environmental reasons, this liquid coolant is usually recycled. While most of the liquid coolant splashes off of the workpiece and is collected in a trough located below, some of the coolant breaks down into small droplets and becomes airborne. Mist collectors have been used to remove these airborne liquid droplets from the immediate vicinity of the machine tool and separate the liquid component from the gaseous component. Mist collectors vary in size and capacity.