Less colored trans-1,3-dichloropropene and process for its production
AssigneeAsahi Glass Company, Limited
InventorsTomoko Matsumoto, Tateo Nakano, Yutaka Yokoyama
Life of this patent
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Abstract
Less colored trans-1,3-dichloropropene and a process for producing it, are presented. A composition comprising cis-1,3-dichloropropene, trans-1,3-dichloropropene and C6 compounds, is subjected to a distillation step and to a step of reacting chlorine or bromine, to remove cis-1,3-dichloropropene as a low boiling component, and then the residue is distilled to remove the chlorinated C6 compounds as a high boiling component and to obtain trans-1,3-dichloropropene as a low boiling component.
Claims7
A process for producing less colored trans-1,3-dichloropropene of high purity, which comprises distilling the following composition (II) obtainable from the following composition (I), to-remove a component containing chlorinated or brominated C6 compounds (compounds X), as a high boiling component, and to obtain trans-1,3-dichloropropene as a low boiling component:
- Composition (I):
- A composition comprising cis-1,3-dichloropropene, trans-1,3-dichloropropene and C6 compounds;
- Composition (II):
- A composition which is the following composition (IIA) and/or the following composition (IIB);
- Composition (IIA):
- A composition which is obtainable by distilling the composition (I) to remove a low boiling component containing cis-1,3-dichloropropene and then reacting chlorine or bromine to the residual high boiling component, and which comprises trans-1,3-dichloropropene and chlorinated or brominated C6 compounds (compounds X);
- Composition (IIB):
- A composition which is obtainable by reacting chlorine or bromine to the composition (I), followed by distillation to remove a low boiling component containing cis-1,3-dichloropropene, and which comprises trans-1,3-dichloropropene and chlorinated or brominated C6 compounds (compounds X).
Less colored trans-1,3-dichloropropene having a Hazen color number (APHA) of at most 200.
Dependencies are inferred from the claim text.