申请人:SUN Xuehui
公开号:US20150259267A1
公开(公告)日:2015-09-17
This disclosure relates to processes which involve: contacting a mixture comprising at least one fluoroolefin and at least one R
f
C≡CX impurity with at least one zeolite to reduce the concentration of the at least one R
f
C≡CX impurity in the mixture; wherein R
f
is a straight-chain perfluorinated alkyl group, and X is H, F, Cl, Br or I; and the at least one zeolite is selected from the group consisting of zeolites having pore opening of at least 4 Angstroms and no more than about 5 Angstroms, zeolites having pore opening of at least about 5 Angstroms and Sanderson electronegativity of no more than about 2.6, and mixtures thereof; provided that the at least one zeolite is not zeolite 4A. This disclosure also relates to processes for making at least one hydrotetrafluoropropene product selected from the group consisting of CF
3
CF═CH
2
, CF
3
CH═CHF, and mixtures thereof; and relates to processes for making at least one hydrochlorotrifluoropropene product selected from the group consisting of CF
3
CCl═CH
2
, CF
3
CH═CHCl, and mixtures thereof.
本公开涉及涉及涉及以下过程:与至少一种氟烯烃和至少一种RfC≡CX杂质组成的混合物接触,以减少混合物中至少一种RfC≡CX杂质的浓度;其中Rf是直链全氟烷基基团,X是H、F、Cl、Br或I;至少一种沸石选自具有至少4埃和不超过约5埃的孔径开口的沸石,具有至少约5埃和桑德森电负性不超过约2.6的孔径开口的沸石,以及它们的混合物;前提是至少一种沸石不是沸石4A。本公开还涉及制备选自CF3CF═CH2、CF3CH═CHF和它们的混合物的至少一种氢四氟丙烯产品的过程;以及涉及制备选自CF3CCl═CH2、CF3CH═CHCl和它们的混合物的至少一种氯三氟丙烯产品的过程。