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US 12,037,310 B2Granted
Continuous photochemical production of high purity linear mercaptan and sulfide compositions
AssigneeArkema Inc.
InventorsJean-Philippe R. Chauvin, Brian E. Lordan, Patricia Wing-Kee Cheung, Vijay R. Srinivas, Andrew D. Polli
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Abstract
Continuous photochemical production of high purity linear mercaptan and sulfide-containing compositions.
Claims7
An apparatus for producing a high purity product thiol from hydrogen sulfide and an olefin comprising:
- a reactor system configured to receive the hydrogen sulfide and the olefin and to produce a reactor effluent stream comprising the product thiol, unreacted hydrogen sulfide, unreacted olefin and other components, and
- separation means to separate said reactor effluent stream into a first portion and a second portion, wherein the reactor system is further configured to recycle said first portion of the reactor effluent stream back the reactor system;
- a flash vaporizer in communication with the separation means, wherein the flash vaporizer is configured to receive said second portion of the reactor effluent stream and to produce:
- a hydrogen sulfide recycle stream comprising at least a portion of the unreacted hydrogen sulfide, and a crude thiol stream comprising the product thiol, the unreacted olefin and the other components and wherein the flash vaporizer is configured to feed the hydrogen sulfide recycle stream to the reactor system;
- a crude thiol separation system in communication with the flash vaporizer and the reactor system, wherein the crude thiol separation system is configured to receive the crude thiol stream, wherein the crude thiol separation system is configured to:
- separate at least a portion of the unreacted olefin from the crude thiol stream to produce an olefin recycle stream comprising the unreacted olefin, a first by-product stream comprising a first portion of the other components, and a crude thiol product stream comprising the product thiol and a second portion of the other components;
- and
- feed the olefin recycle stream to the reactor system;
- and
- a product thiol purification unit in communication with the crude thiol separation system, wherein the product thiol purification unit is configured to:
- receive the crude thiol product stream;
- and
- produce a product thiol stream comprising purified product thiol comprising at least 98.5 weight percent of the product thiol and a second by-product stream comprising the second portion of the other components.
10 more elements
An apparatus for producing a high purity product sulfide from hydrogen sulfide or R1SH, and an olefin of formula CxH(2x) comprising:
- a reactor system, wherein the reactor system is configured to:
- receive the hydrogen sulfide or the R1SH, and the olefin of formula CxH(2x) to form a reactor effluent stream comprising the product sulfide, unreacted hydrogen sulfide or unreacted olefin of formula CxH(2x), unreacted R1SH, and other components;
- reactor effluent stream separation means to separate said reactor effluent stream into a first portion and a second portion, wherein the reactor system is further configured to recycle said first portion of the reactor effluent stream back the reactor system;
- and
- a sulfide separation system, wherein the sulfide separation system is in communication with the reactor effluent stream separation means and is configured to:
- receive said second portion of the reactor effluent stream from the reactor effluent stream separation means;
- and
- produce at least one recycle stream comprising at least a portion of the unreacted hydrogen sulfide, the unreacted olefin of formula CxH(2x), the unreacted R1SH, and other components, and a product stream comprising the high purity product sulfide.
5 more elements
Dependencies are inferred from the claim text.