Abstract: The invention is to a process for removing contaminants from a compressor and/or compressor intercooler in a methanol to olefin separation system. The process comprises compressing an effluent in a compressor having an inlet and an outlet and a compressor surface, the compressing occurring under conditions effective to form a contaminant on the compressor surface. A contaminant-removal medium is injected into the compressor or intercooler and the contaminant-removal medium contacts the contaminant under conditions effective to remove the contaminant from the compressor or intercooler inner surface thereby forming a mobile contaminant. The mobile contaminant is then removed from the compressor or intercooler.

Abstract: A device for aiding in laying bricks to form a multi-sided brick construct comprises retaining means and a plurality of levels; wherein the retaining means allows the device to be retained at a given position in relation to a construct being formed so that the levels can be used to ensure that a course of bricks above the retaining means is laid substantially horizontally along a plurality of sides of the construct; and wherein the retaining means is mounted so that it can be moved or removed relative to the rest of the device.