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US 2022/0089449 A1Published application
Method for producing chlorosilanes
AssigneeWacker Chemie AG
InventorsKarl-Heinz Rimböck, Andreas Hirschmann
Life of this patent
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Abstract
The present disclosure relates to a process for producing chlorosilanes by reaction of a reaction gas containing hydrogen, tetrachlorosilane and optionally at least one further chlorosilane in a reactor and optionally in the presence of a catalyst. The chlorosilanes have the general formula HnSiCl4-n, and the reactor design is described by an index K1, the composition of the reaction gas before entry into the reactor is described by an index K2, and the reaction conditions are described by an index K3.
Claims18
1-18. (canceled)
A process for producing chlorosilanes, comprising:
- reacting a reaction gas containing hydrogen, tetrachlorosilane and optionally at least one further chlorosilane in a reactor, optionally in the presence of a catalyst, wherein the chlorosilanes have the general formula HnSiCl4-n where n=1 to 3, and
- wherein the reactor design is described by an index
- K
-
-
- 1
- =
- κ
- ·
- ϑ
- ·
- (
- A
- tot
- ,
- Δ
-
-
- T
- -
- -
- A
- tot
- ,
- Δ
-
-
- T
- +
- )
- ·
- l
- tot
- ,
- gas
- V
- R
- ,
- eff
- ;
- wherein ∂ is a
- temperature
-
-
- factor
- =
- T
- gas
- ,
- out
- -
- T
- gas
- ,
- in
- T
- gas
- ,
- control
- ;
- wherein Tgas,out is a gas outlet temperature [° C.];
- wherein Tgas,in is a gas inlet temperature [° C.];
- and
- wherein Tgas,control is a control temperature [° C.];
- wherein x is an
- area
-
-
- factor
- =
- A
- active
- +
- A
- cat
- A
- passive
- ;
- wherein Aactive is a surface area having an effect on byproduct formation [m2];
- wherein Acat is a surface area having a catalytic effect on byproducts [m2];
- wherein Apassive is a surface area without effect on byproduct formation [m2];
- wherein Atot,ΔT− is a cooled heat exchanger surface area in the reactor [m2];
- wherein Atot,ΔT+ is a heated heat exchanger surface area in the reactor [m2];
- wherein VR,eff is an effective reactor volume [m3];
- wherein ltot,gas is a length of gas path in reactor [m];
- wherein Atot,ΔT− is 320 to 1450 m2;
- wherein Atot,ΔT+ is 90 to 420 m2;
- wherein VR,eff is 2 to 15 m3;
- and
- wherein ltot,gas is 5 to 70 m;
- wherein the composition of the reaction gas before entry into the reactor is described by an index
- K
-
-
- 2
- =
- R
- tot
- ,
- gas
- ·
- V
- .
- n
- ,
- STC
- V
- .
- n
- ,
- H
-
-
- 2
- ·
- 100
- ;
- wherein {dot over (V)}n,STC is a volume flow of STC [Nm3/h];
- wherein {dot over (V)}n,H2 is a volume flow of hydrogen [Nm3/h];
- wherein Rtot,gas is a purity of the reaction gas [%];
- wherein {dot over (V)}n,STC is 600 to 5800 Nm3/h;
- and
- wherein {dot over (V)}n,H2 is 750 to 13,500 Nm3/h;
- the reaction conditions are described by an index
- K
-
-
- 3
- =
- W
- el
- ·
- v
- F
- V
- R
- ,
- eff
- ·
- ρ
- F
- p
- diff
- 2
- ·
- 10
- 10
- ;
- wherein Wel is an electrical power [kg*m2/s2];
- wherein νF is a kinematic viscosity of the fluid [m2/s];
- wherein ρF is a fluid density [kg/m3];
- wherein pdiff is a differential pressure of reaction gas [kg/m*s2];
- wherein Wel is 450,000 to 3,700,000 kg*m2/s2;
- wherein νF is 2.5*10−4 to 5.1*10−4 m2/s;
- wherein ρF is 19.5 to 28 kg/m3;
- and
- wherein pdiff is 4.5*105 to 3*106 kg/m*s2;
- and
- wherein K1 has a value of 66 to 2300, K2 has a value of 13 to 250 and K3 has a value of 7 to 1470.
156 more elements
Dependencies are inferred from the claim text.