Abstract:
Isomerization of aliphatic olefins having terminal double bonds while retaining the carbon chain by isomerization of olefins having nine to 22 carbon atoms in the presence of a boron phosphate catalyst at elevated temperature. Isomerization mixtures according to the invention and their components are starting materials for the production of detergents and emulsifiers and auxiliaries for the textile, paper and leather industries.
Abstract:
A crystalline polypropylene of mean intrinsic viscosity 1.3-2.3 and of which at least 94% has a range of viscosity of 0.5-3.0 is used to prepare stretched fibres, threads and woven and non-woven fabrics. The polypropylene may be prepared by mechanically degrading, e.g. in a high shear gradient of a screw extruder, a polypropylene of mean intrinsic viscosity of at least 6 which may first be degraded by oxidation.