Recirculation telomerization process and its liquid telomers and liquid telomers produced thereby
US4041088A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1976 |
| Grant date | Aug 9, 1977 |
| Priority date | — |
| Expiry date | Nov 8, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S585/923
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Recirculation process and apparatus for the preparation of normally liquid telomers derived from the reaction of a gaseous taxogen with a solution in a liquid telogen, such as toluene, of an organometal telomerization initiator, such as a mixture or complex of n-butyllithium and potassium t-butoxide, in a container, wherein a controlled stream of the gaseous taxogen is continuously passed through fine apertures, as in a screen, into the liquid telogen solution of said initiator while said telogen solution is passed from said container through a reaction zone in a reaction chamber, whereby to produce the normally liquid telomer, and, thereafter, said liquid telomer is continuously returned to commingle with the solution in the container of said telogen and initiator, and continuously recirculating the contents of said container into said reaction zone for further reaction with said gaseous taxogen until the desired concentration of liquid telomer is produced. The process is most desirably carried out in a controlled manner to prevent any undesirable excess of the taxogen from accumulating during the chain transfer step of the telomerization process. The process also results in the p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.