Abstract: The present disclosure relates to a method for treating an electromembrane process aqueous composition comprising sodium and/or potassium sulfate, said process comprising removing water from said electromembrane process aqueous composition under conditions suitable for substantially selectively precipitating sodium and/or potassium sulfate monohydrate.

Abstract: A cleaning card for use in cleaning internal surfaces of machine components, including internal, rotatable idler rolls, includes a substrate having a central plane between opposed surfaces thereof, a machine direction dimension defined between opposed end edges and a transverse direction dimension defined between opposed side edges. The substrate includes an angled embossment forming angled, substantially non-collapsible, elongate raised ridges on opposite sides of the cleaning card substrate, with the raised ridges being oriented at an angle to the machine direction for incrementally engaging an idler roll surface along its axial extent as the raised ridges pass through a nip including the idler roll to aid in both rotating and cleaning one or more idler rolls. In preferred embodiments the opposed surfaces of the substrate each have a plurality of discrete, raised and collapsible working areas for engaging and cleaning internal surfaces of machine components in addition to idler rolls.

Abstract: A cleaning card for cleaning internal surfaces of a machine-actuating mechanism includes a substrate having a central plane between opposed surfaces thereof, a machine direction dimension defined between opposed end edges and a transverse direction dimension defined between opposed side edges. The opposed surfaces each have a plurality of discrete raised areas providing a plurality of transversely extending rows of discrete raised areas. At least some of the discrete raised areas in at least some of the transversely extending rows extend outwardly on each side of the central plane. The discrete raised areas each include a peak and a peripheral wall joined at one edge to the peak and having an opposed edge that is closer to the central plane than the peak. The cleaning substrate has an effective thickness between the opposed surfaces that is greater than the nominal thickness between those surfaces.