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公开(公告)号：US09676800B2
公开(公告)日：2017-06-13
申请号：US14962095
申请日：2015-12-08
Applicant: INVISTA NORTH AMERICA S.A R.L.
Inventor： William J. Tenn, III , Sudhir N. V. K. Aki , Thomas E. Vos , Tseng H. Chao
CPC classification number: C07F9/4841 , B01D11/0426 , B01D11/0434 , B01D11/0488 , B01D11/0492 , B01D2011/002 , B01J31/1865 , B01J31/4053 , B01J38/56 , B01J2231/343 , B01J2531/847 , Y02P20/582 , Y02P20/584
Abstract: Disclosed herein are methods for recovering diphosphonite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using multistage countercurrent liquid-liquid extraction. Recovery is enhanced with one or more method steps. In a first step, a portion of the heavy phase from the settling section of the first stage is recycled to the settling section of the first stage. In a second step, a portion of the light phase from the settling section of the first stage is recycled to the mixing section of the first stage. In a third step, the first stage takes place in a mixer-settler, a Lewis base is introduced into the settling section of the first stage, and a complex of Lewis acid and Lewis base is formed in this settling section. In a fourth step, a polyamine is added to the first stage.
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公开(公告)号：US09388204B2
公开(公告)日：2016-07-12
申请号：US14367156
申请日：2012-11-20
Applicant: INVISTA North America S.a r.l.
Inventor： William J. Tenn, III , Sudhir N. V. K. Aki , Thomas E. Vos , Tseng H. Chao
CPC classification number: C07F9/65746 , B01D11/0426 , B01D11/0457 , B01J31/185 , B01J31/4053 , B01J2531/847 , C07F9/141 , C07F9/145 , Y02P20/582 , Y02P20/584
Abstract: Disclosed herein are methods for recovering diphosphite-containing compounds from mixtures comprising organic mononitriles and organic dinitriles, using liquid-liquid extraction. Also disclosed are treatments to enhance extractability of the diphosphite-containing compounds.
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