Abstract: The present invention provides a reusable packaging system comprising an envelope having first and second substantially planar sides which are secured to one another so as to define a container having an open end, the first and second sides defining respective apertures there through in the vicinity of the open end of the envelope, the apertures being substantially aligned with one another and a closure member which is substantially planar, flexible and has opposing surfaces at least a portion of one of which carries an adhesive coating, the closure member being located adjacent the open end of the envelope such that the surface carrying the adhesive coating contacts itself through the apertures in the first end and second sides of the envelope. Also provided is a reusable envelope and a closure member for use in such a reusable packaging system.

Abstract: A process for removing sulfur dioxide from a gas stream by absorption in a buffered, aqueous thiosulfate and polythionate solution followed by regeneration of the enriched solution with hydrogen sulfide to form sulfur wherein excess hydrogen sulfide recovered from the regeneration step is introduced to the absorption step to reduce bisulfite concentration in the enriched solution.

Abstract: A wet scrubbing process for desulfurization of waste gas which employs calcium carbonate reactant in the presence of a magnesium compound wherein the magnesium compound is obtained from partially calcined, magnesium-containing limestone.

Abstract: Oligomers of isobutene are depolymerized at 200.degree. to 580.degree. C in vapor phase by contact with a catalyst consisting essentially of the oxide of Cr, Mo or W on a high surface area silica support.