摘要:
The present disclosure includes various manufacturing and separation processes for the production of (Z)-1-chloro-3,3,3-trifluoropropene from (E)-1-chloro-3,3,3-trifluoropropene. The efficient separation of (Z)-1-chloro-3,3,3-trifluoropropene from unreacted (E)-1-chloro-3,3,3-trifluoropropene may allow for the ability to recycle unreacted starting materials and to maximize raw material utilization and product yields.
摘要:
A process is disclosed for (i) producing E -1,1,1,4,4,4-hexafluoro-2-butene ( E -HFO-1336mzz) from Z-1,1,1,4,4,4-hexafluoro-2-butene (Z-HFO-1336mzz), comprising the steps of (a) providing a starting material comprising Z-1,1,1,4,4,4-hexafluoro-2-butene, (b) contacting the starting material with a suitable catalyst in a reaction zone to produce E -HFO-1336mzz; and optionally, (c) recovering the E -HFO-1336mzz. The process may be performed in the gas phase or in the liquid phase and as a batch process or as a continuous process.
摘要:
The disclosure provides a process for the manufacture of trans 1-chloro3,3,3-trifluoropropene (trans 1233zd) by fluorinating 1230za and/or 240fa to a cis/trans mixture of 1233zd, separating the trans isomer followed by an isomerization of cis 1233zd to trans 1233zd in the fluorination step. The fluorination step is carried out in the gas phase or the liquid phase. The isomerization is carried out in the gas phase with a high surface area heterogeneous Cr catalyst, supported or unsupported.
摘要:
Processes for the production of chlorinated propenes are provided. The processes proceed through the production of cyclic intermediate that is thereafter readily converted to a desired chloropropane, e.g., via selective pyrolysis. The process may be conducted using starting materials that are readily commercially available and/or that may be reacted safely in standard laboratory equipment so that capital cost savings may be seen. The process does not require the use of catalysts and yet, process conditions less extreme than many conventional processes for the production of chlorinated propenes are suitable, so that raw material and utility cost savings are also possible.
摘要:
3,4-Dichlorobutene-1 is produced by a process comprising the step of contacting 1,4-dichlorobutene-2 with either 1) a ferric carboxylate catalyst of the formula (I) where R is an alkyl or alkenyl group of 4-18 carbon atoms, a cycloalkyl or cycloalkenyl group of 6-18 carbon atoms or an aryl group selected from phenyl, benzyl, xylyl, tolyl, and naphthyl groups, whereby a portion of the 1,4-dichlorobutene-2 is isomerized to form 3,4-dichlorobutene-1, or 2) a ferric carboxylate catalyst of the formula (II) where R, R' and R'' are independently alkyl or alkenyl groups of 4-18 carbon atoms, cycloalkyl or cycloalkenyl groups of 6-18 carbon atoms or aryl groups selected from phenyl, benzyl, xylyl, tolyl, and naphthyl groups, the sum of m, n and o is 3 and m, n and o are independently 0, 1 or 2, whereby a portion of the 1,4-dichlorobutene-2 is isomerized to form 3,4-dichlorobutene-1.
摘要:
The present invention involves methods for isomerization of 1234zc. Also provided are methods for managing 1,1,3,3-tetrafluoropropene produced as a byproduct in a process for synthesizing trans-1,3,3,3-tetrafluoropropene from 245fa, wherein 1234zc is converted into trans/cis-1234ze with the help of a catalyst in the absence of HF and in an isomerization reactor, or is converted into 1234zc and/or 245fa with the help of a catalyst in the presence of HF in a separate reactor or preferably in the same reactor of 245fa dehydrofluorination.
摘要:
The present invention involves methods for isomerization of 1234zc. Also provided are methods for managing 1,1,3,3-tetrafluoropropene produced as a byproduct in a process for synthesizing trans-1,3,3,3-tetrafluoropropene from 245fa, wherein 1234zc is converted into trans/cis-1234ze with the help of a catalyst in the absence of HF and in an isomerization reactor, or is converted into 1234zc and/or 245fa with the help of a catalyst in the presence of HF in a separate reactor or preferably in the same reactor of 245fa dehydrofluorination.