Raw wool treating supercritical CO2 process

Abstract

The raw wool treating supercritical CO2 process includes the following steps: 1. depurating raw wool; 2. extracting depurated raw wool with supercritical CO2 to obtain lanolin and degreased wool. The supercritical CO2 process has the conditions, including extraction pressure 30-40 MPa, extraction temperature 60-75 deg.c, the first stage separation pressure 9-10 MPa, the first stage separation temperature 45-50 deg.c, the second stage separation pressure 5-6MPa, and the second stage separation temperature 36-42 deg.c. The present invention has simple technological process, high product yield, environment friendship, low cost and high product quality.

Description

technical field

[0001] The invention relates to a method for directly processing raw wool to extract refined lanolin and degreased wool, in particular to a method using supercritical CO 2 Process for processing raw wool to extract refined lanolin and skimmed wool. Background technique

[0002] Wool is a high-grade textile material. The raw wool cut from sheep contains 9% to 12% lanolin. The wool used as raw material for wool spinning should be degreased wool with a fat content equal to or lower than 1% after the lanolin is removed from the raw wool. The raw wool should be processed. The first purpose of the processing is to obtain degreased wool with a fat content equal to or lower than 1%, and then to obtain lanolin. Lanolin is a natural substance with relatively complex components. The refined lanolin has good water absorption, wettability, film-forming property, lipophilicity, emulsification and dispersibility. It does not crystallize at low temperature and has bacteric...