Process for manufacturing organochlorosilanes and dipodal silanes
View Patent ↗Processes are provided for producing organchlorosilanes and dipodal silanes in which an organic halide or alkene or chloralkene is reacted with a hydridochlorosilane in the presence of a quarternary phosphonium salt catalyst by providing sufficient heat to effect a dehydrohalogenative coupling reaction and/or a hydrosilylation reaction and venting the reaction to control reaction pressure and to remove gaseous byproducts from the reaction. The processes are preferably continuous using a catalyst in fluid form at reaction pressures not exceeding about 600 psi. The reactions may be carried out substantially isothermally and/or isobarically, for example in a plug flow reactor or continuous stirred tank reactor. The processes may produce novel silylated compounds including 1,2-bis(trichlorosilyl)decane or 1,2-bis(trimethoxysilyl)decane.
1. A process for producing an organochlorosilane comprising:
mixing a hydridochlorosilane, an organic halide and a quaternary phosphonium salt catalyst,
providing sufficient heat to effect a dehydrohalogenative coupling reaction of the hydridochlorosilane with the organic halide, and
venting the reaction to control reaction pressure and to remove gaseous byproducts from the reaction.
2. The process according to claim 1 , wherein the process is continuous.
3. The process according to claim 2 , wherein the catalyst is in fluid form selected from the group consisting of a homogenous solution, a liquid and a molten catalyst.
4. The process according to claim 3 , wherein the catalyst comprises an alkyl phosphonium chloride.
5. The process according to claim 2 , wherein the reaction is carried out substantially isothermally.
6. The process according to claim 5 , wherein the reaction takes place in an isothermal plug flow reactor.
7. The process according to claim 5 , wherein the reaction takes place in an isothermal continuous stirred tank reactor.
8. The process according to claim 2 , wherein the reaction is carried out substantially isobarically.
9. The process according to claim 8 , wherein the reaction pressure does not exceed about 600 p.s.i.
10. The process according to claim 2 , wherein the residence time of the reaction in a reactor is not greater than about two hours.
11. A process for producing a dipodal silane comprising:
mixing a hydridochlorosilane, an alkene and a quaternary phosphonium salt catalyst,
providing sufficient heat to effect a double hydrosilylation reaction of the alkene with the hydridochlorosilane, and
venting the reaction to control reaction pressure and to remove gaseous byproducts from the reaction.
12. The process according to claim 11 , wherein the process is continuous.
13. The process according to claim 12 , wherein the catalyst is in fluid form selected from the group consisting of a homogenous solution, a liquid and a molten catalyst.
14. The process according to claim 13 , wherein the catalyst comprises an alkyl phosphonium chloride.
15. The process according to claim 12 , wherein the reaction is carried out substantially isothermally.
16. The process according to claim 15 , wherein the reaction takes place in an isothermal plug flow reactor.
17. The process according to claim 15 , wherein the reaction takes place in an isothermal continuous stirred tank reactor.
18. The process according to claim 12 , wherein the reaction is carried out substantially isobarically.
19. The process according to claim 18 , wherein the reaction pressure does not exceed about 600 p.s.i.
20. The process according to claim 12 , wherein the residence time of the reaction in a reactor is not greater than about five hours.
21. A process for producing a dipodal silane comprising:
mixing a hydridochlorosilane, a chloroalkene and a quaternary phosphonium salt catalyst,
providing sufficient heat to effect a dehydrohalogenative coupling reaction and a hydrosilylation reaction of the chloroalkene with the hydridochlorosilane, and
venting the reaction to control reaction pressure and to remove gaseous byproducts from the reactions.
22. The process according to claim 21 , wherein the process is continuous.
23. The process according to claim 22 , wherein the catalyst is in fluid form selected from the group consisting of a homogenous solution, a liquid and a molten catalyst.
24. The process according to claim 23 , wherein the catalyst comprises an alkyl phosphonium chloride.
25. The process according to claim 22 , wherein the reactions are carried out substantially isothermally.
26. The process according to claim 25 , wherein the reactions take place in an isothermal plug flow reactor.
27. The process according to claim 25 , wherein the reactions take place in an isothermal continuous stirred tank reactor.
28. The process according to claim 22 , wherein the reactions are carried out substantially isobarically.
29. The process according to claim 28 , wherein the pressure of the reactions does not exceed about 600 p.s.i.
30. The process according to claim 22 , wherein the residence time of the reactions in a reactor is not greater than about five hours.