摘要:
A process for the manufacture of polycarboxylic acids is disclosed. In this novel process, iron is used to improve the selectivity of cobalt-manganese-bromine or zirconium-cobalt-manganese-bromine oxidation system. Polycarboxylic acids such as pseudocumene are converted to trimellitic acid which is used to manufacture plasticizers and polyamide-imide polymers used as molding compounds for replacement of metals.
摘要:
Polybutene polymers and polybutene-1 polymers are prepared from a feed stream which has been fractionated to remove no more than about 50 (wt) % of the cis-2-butene originally present.