Blocks, sulfur-based

Terrel, et al (33,3A 35). Another approach uses SC to fabricate various block shapes and is aimed at a variety of uses particularly suited for the Middle East. Until recently, all attempts to develop a cold, press-mold sulfur-based technology have been unsuccessful. However, this barrier appears to have been broken with the promising technology being developed at the University of Washington, Seattle. Through careful formulation,... 

The advantages of sulfur-based olefination reactions in syntheses of complex targets stem from the relative ease of generating the C - S bond in various building blocks and from the compatibility of sulfur-containing functional groups with many chemical transformations. 

AH commercial processes for the manufacture of caprolactam ate based on either toluene or benzene, each of which occurs in refinery BTX-extract streams (see BTX processing). Alkylation of benzene with propylene yields cumene (qv), which is a source of phenol and acetone ca 10% of U.S. phenol is converted to caprolactam. Purified benzene can be hydrogenated over platinum catalyst to cyclohexane nearly aH of the latter is used in the manufacture of nylon-6 and nylon-6,6 chemical intermediates. A block diagram of the five main process routes to caprolactam from basic taw materials, eg, hydrogen (which is usuaHy prepared from natural gas) and sulfur, is given in Eigute 2. 

Methylnitramine explodes on heating or on contact with coned sulfuric acid. Based on tests conducted in the USA during WWII, it is more powerful than TNT (144% as detd by Trauzl lead block test) (Ref 3) ... 

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