| US 7,491,299 B2 | ||
| Semi-continuous photochemical method and device therefor | ||
| Mélanie Hebert, Jurancon (France); Jean Ollivier, Arudy (France); and Georges Fremy, Sauveterre de Bearn (France) | ||
| Assigned to Arkema France, Colombes (France) | ||
| Appl. No. 10/473,993 PCT Filed Apr. 04, 2002, PCT No. PCT/FR02/01175 § 371(c)(1), (2), (4) Date May 04, 2004, PCT Pub. No. WO02/081080, PCT Pub. Date Oct. 17, 2002. |
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| Claims priority of application No. 01 04631 (FR), filed on Apr. 05, 2001. | ||
| Prior Publication US 2005/0040028 A1, Feb. 24, 2005 | ||
| Int. Cl. C07C 1/00 (2006.01); C07F 1/00 (2006.01); C07B 45/00 (2006.01) | ||
| U.S. Cl. 204—157.15 [204/157.6; 204/157.76] | 9 Claims |
| 1. A semi-continuous photochemical synthesis process comprising:
introducing a first reagent selected from a mercaptan or hydrogen sulphide into a first reaction zone of a photochemical reactor
which comprises two zones, in a quantity sufficient to totally immerse a radiating portion of a lamp therein; thereafter
activating said lamp; and thereafter
gradually introducing a second alkene reagent into said first reaction zone, forming a reaction medium comprising said first
reagent and said second alkene reagent; said second alkene reagent introduced in sufficient quantity to cause said reaction
medium in said first reaction zone to overflow said first reaction zone and spill off, via an overflow, into a second zone
of said photochemical reactor whose volume is sufficient to contain said overflow of said reaction medium corresponding substantially
to the volume of said second alkene reagent introduced.
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