Apparatuses and processes for distillation and distillation column assembly

A process for fabrication and/or use of an apparatus for distillation, the process comprising:

• providing a plurality of packing units, each of the packing units having a plurality of corrugated sheets of material encircled by at least one banding element;
• providing a plurality of column assembly sheets, each of the column assembly sheets being corrugated to have a plurality of flat walls and a plurality of angled walls, each of the flat walls extending from a first end to a second end, each of the flat walls having a first side and a second side opposite the first side between the first end and the second end, the plurality of flat walls comprising a first flat wall and the plurality of angled walls including a first angled wall extending from the first side of the first flat wall and a second angled wall extending from the second side of the first flat wall;
• positioning the packing units in channels of a first column assembly sheet of the plurality of column assembly sheets and attaching a second column assembly sheet to the first column assembly sheet to enclose the packing units and form columns for forming a multicolumn assembly.