This heat exchanger is a device used to transfer heat between one or more fluids, which consist of series of tubes. One set of these tubes contains the fluid that must be either heated or cooled. The second fluid runs over the tubes that are being heated or cooled so that it can either provide the heat or absorb the heat required.
The present invention includes a process and apparatus for the production of methylene diphenyl diisocyanate (MDI) isomer mixtures with a low 2,2-MDI isomer content and a high 2,4-MDI isomer content. The resulting mixtures have an increased reactivity and are acceptable in food grade application due to the reduction in primary aromatic amines formed during the curing process.
CBG - KEYCODE BAYER 486Apr 06, 2011 · BAYER´s competitor BASF has received approval for a 400,000 metric tons per year MDI project in Chongqing, China. In the course of these expansions, production of the lethal gas phosgene would rise by tens of thousands of tons annually. Phosgene is fatal, even in the smallest doses.
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