Method and apparatus for producing high purity phosgene
First Claim
Patent Images
1. A method of producing phosgene, comprising:
- reacting carbon monoxide and chlorine in a phosgene reactor in the presence of a catalyst to produce a final product composition comprising phosgene;
wherein carbon tetrachloride is present in the final product composition in an amount of 0 to 10 ppm by volume, based on the total volume of phosgene;
wherein the phosgene reactor comprises a tube, a shell, and a space located between the tube and the shell;
wherein a peak temperature in the phosgene reactor is less than 800°
C.; and
wherein the catalyst is disposed in the tube and a cooling medium is located in the space, or the catalyst is disposed in the space and a cooling medium is located in the tube;
wherein the tube comprises at least one ofa first concentric tube having a multi-petal cross-sectional geometry concentrically located in the shell;
a twisted tube;
an internal scaffold;
an external scaffold;
the catalyst being disposed on an inner wall of the tube; and
a mini-tube and a second tube section;
wherein when the tube comprises the mini-tube section then the reacting comprises passing a feed comprising carbon monoxide and chlorine over the catalyst in the mini-tube section to produce a first product composition, wherein the mini-tube has an average diameter of 0.1 to 10 millimeters; and
passing at least a portion of the first product composition over the catalyst disposed in the second tube section, wherein the second tube section comprises an increased diameter tube with an average diameter greater than the mini-tube, to produce the final product composition.
2 Assignments
0 Petitions
Accused Products
Abstract
A reactor for producing phosgene, the reactor comprising: tube located in a shell and a space located between the tube and the shell; a cooling medium located in the space and a catalyst located in the tube or cooling medium located in the tube and a catalyst located in the space; a feed inlet; and a product mixture outlet; wherein the tube comprises one or more of: a mini-tube and a second tube section; a first concentric tube concentrically located in the shell; a twisted tube; an internal scaffold; and an external scaffold.
34 Citations
17 Claims
-
1. A method of producing phosgene, comprising:
-
reacting carbon monoxide and chlorine in a phosgene reactor in the presence of a catalyst to produce a final product composition comprising phosgene; wherein carbon tetrachloride is present in the final product composition in an amount of 0 to 10 ppm by volume, based on the total volume of phosgene; wherein the phosgene reactor comprises a tube, a shell, and a space located between the tube and the shell;
wherein a peak temperature in the phosgene reactor is less than 800°
C.; andwherein the catalyst is disposed in the tube and a cooling medium is located in the space, or the catalyst is disposed in the space and a cooling medium is located in the tube; wherein the tube comprises at least one of a first concentric tube having a multi-petal cross-sectional geometry concentrically located in the shell; a twisted tube; an internal scaffold; an external scaffold; the catalyst being disposed on an inner wall of the tube; and a mini-tube and a second tube section; wherein when the tube comprises the mini-tube section then the reacting comprises passing a feed comprising carbon monoxide and chlorine over the catalyst in the mini-tube section to produce a first product composition, wherein the mini-tube has an average diameter of 0.1 to 10 millimeters; and
passing at least a portion of the first product composition over the catalyst disposed in the second tube section, wherein the second tube section comprises an increased diameter tube with an average diameter greater than the mini-tube, to produce the final product composition. - View Dependent Claims (2, 3)
-
-
4. A reactor for producing phosgene, the reactor comprising:
-
a tube located in a shell and a space located between the tube and the shell; a cooling medium located in the space and a catalyst located in the tube or cooling medium located in the tube and a catalyst located in the space; a feed inlet; and a product mixture outlet; wherein the tube comprises one or more of a mini-tube and a second tube section, wherein the mini-tube has an average diameter of 0.1 to 10 millimeters; and
wherein the second tube section comprises an increased diameter tube with an average diameter greater than the mini-tube;a first concentric tube concentrically located in the shell; a twisted tube; an internal scaffold; and an external scaffold. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
Specification