Method for recycling of phenolic antioxidant agent, process for production of olefin polymer, polyolefin powder, and fibers

摘要

Provided are a recycling method for industrially, simply and effectively recycling a phenolic body from a phenolic antioxidant which is masked by an organoaluminum compound and contained in an olefin polymer obtained by supplying the masked phenolic antioxidant upon polymerization; and an olefin polymer obtained by this method.;In a method for recycling a phenolic antioxidant wherein a phenolic antioxidant which is masked by an organoaluminum compound and contained in an olefin polymer obtained by supplying the masked phenolic antioxidant upon polymerization is recycled to a phenolic body, a nitrogen gas comprising water and/or a proton donor at a volume ratio of 1.0×10−6 to 2.5×10−2 with respect to 1 volume of nitrogen is brought into contact with the olefin polymer.

主权项

1. A method for recycling a phenolic antioxidant from a phenolic antioxidant masked with an organoaluminum compound and contained in an olefin polymer, wherein the phenolic antioxidant is represented by Formula (1) below:(wherein R represents C12-C24 alkyl which is optionally branched, C3-C12 cycloalkyl which is optionally substituted, or C6-C18 aryl which optionally has a substituent(s)); which comprises contacting said olefin polymer with nitrogen gas comprising water and/or a proton donor at a volume ratio of 1.0×10−6 to 2.5×10−2 with respect to 1 volume of nitrogen.