Method for purifying trans-1,3,3,3-tetrafluoropropene
AssigneeCentral Glass Company, Limited
InventorsHideaki Imura, Naoto Takada, Masamune Okamoto
Life of this patent
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Abstract
Disclosed is a method for purifying a trans-1,3,3,3-tetrafluoropropene, in which a composition containing trans-1,3,3,3-tetrafluoropropene and at least one impurity selected from the group consisting of C2H3ClF2, CF3CH2CHClF, CF3CH2CHF2, CHF2CH═CF2, CF3CH═CHCl, CF3CH═CH2, CF3C≡CH, and cis-1,3,3,3-tetrafluoropropene is brought into contact with a solid adsorbent to reduce an impurity content thereof. By this method, it is possible to remove the impurity in trans-1,3,3,3-tetrafluoropropene by a simple operation.
Claims9
A method for purifying a trans-1,3,3,3-tetrafluoropropene, comprising the steps of:
- (a) dechlorinating a molecular sieve 13X to prepare a dechlorinated molecular sieve 13X;
- and
- (b) bringing a composition containing trans-1,3,3,3-tetrafluoropropene and at least one impurity selected from the group consisting of C2H3ClF2, CF3CH2CHClF, CF3CH2CHF2, CHF2CH═CF2, CF3CH═CHCl, CF3CH═CH2, CF3C≡CH, and cis-1,3,3,3-tetrafluoropropene into contact with the dechlorinated molecular sieve 13X as a solid adsorbent to reduce an impurity content thereof.
A solid-liquid, heterogeneous mixture, comprising:
- (a) a composition containing trans-1,3,3,3-tetrafluoropropene and at least one organic matter selected from the group consisting of C2H3ClF2, CF3CH2CHClF, CF3CH2CHF2, CHF2CH═CF2, CF3CH═CHCl, CF3CH═CH2, CF3C≡CH, and cis-1,3,3,3-tetrafluoropropene, and
- (b) a dechlorinated molecular sieve 13X as a solid adsorbent.
Dependencies are inferred from the claim text.