Lamp for photochemical reactor with light-emitting diodes

Patent metadata

Field	Value
Publication number	US-11844154-B2
Application number	US-202117760131-A
Country	US
Kind code	B2
Filing date	Feb 22, 2021
Priority date	Feb 20, 2020
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

A lamp for a photochemical reactor, including: a support member made of a material having a thermal conductivity greater than or equal to 100W/mK at 20° C. and including at least one channel configured to contain a coolant fluid; at least one printed circuit mounted on the support member; and at least one light-emitting diode mounted on the printed circuit. A photochemical reactor including such a lamp, and a method for preparing a cycloalkanone oxime or a lactam using such a lamp.

First claim

The invention claimed is:

1. A lamp for a photochemical reactor comprising:
a support made of a material having thermal conductivity that is greater than or equal to 100 W/m·K at 20° C. and comprising at least one channel configured to contain a coolant fluid;
at least one printed circuit board mounted on said support; and
at least one light-emitting diode mounted on said printed circuit board.

2. The lamp as claimed in claim 1 , wherein the material of the support is selected from the group consisting of copper, silver, gold, aluminum, silicon carbide, graphite, aluminum-silicon carbide alloys, zinc, and combinations thereof.

3. The lamp as claimed in claim 1 , wherein the material of the support has thermal conductivity that is greater than or equal to 300 W/m·K at 20° C.

4. The lamp as claimed in claim 1 , further comprising a bulb containing the support, the at least one printed circuit board and the at least one light-emitting diode.

5. The lamp as claimed in claim 4 , wherein the bulb contains an inert gas, the inert gas being a flow form of inert fluid.

6. The lamp as claimed in claim 1 , wherein the support has a convex polygon-shaped cross-section.

7. The lamp as claimed in claim 6 , wherein the convex polygon has from 5 to 25 sides.

8. The lamp as claimed in claim 1 , wherein the at least one channel comprises the coolant fluid.

9. The lamp as claimed in claim 8 , further comprising a coolant fluid supply line comprising the coolant fluid having a temperature that is less than or equal to 25° C.

10. The lamp as claimed in claim 1 , having luminous efficiency that is greater than or equal to 40%.

11. An immersion photochemical reactor comprising a reaction liquid and at least one lamp as claimed in claim 1 at least partly immersed in said reaction liquid.

12. A method for preparing a cycloalkanone oxime comprising photonitrozation of a cycloalkane using a nitrozating agent and at least one lamp as claimed in claim 1 .

13. A method for preparing a lactam comprising:
preparing a cycloalkanone oxime according to the preparation method of claim 12 ; and
Beckmann transposition of the cycloalkanone oxime.

14. The lamp as claimed in claim 1 , wherein the lamp comprises a coolant fluid supply line is made of copper.

15. The lamp as claimed in claim 1 , wherein the lamp comprises a coolant fluid collection line for recovering a coolant fluid after the coolant fluid has passed through the support, the coolant fluid collection line being made of copper.

16. The lamp as claimed in claim 1 , wherein the at least one channel configured to contain the coolant fluid is perforated.

17. The lamp as claimed in claim 1 , wherein the at least one printed circuit board is a metal core printed circuit board containing a dielectric layer between the at least one light-emitting diode mounted on the at least one printed circuit board and a metal base of the at least one printed circuit board; or is a metal core printed circuit board with direct thermal path technology that does not include a dielectric layer between the at least one light-emitting diode mounted on the at least one printed circuit board and a metal base of the at least one printed circuit board.

18. The lamp as claimed in claim 1 , wherein the at least one light-emitting diode is directly mounted onto a surface of the at least one printed circuit board.

19. The lamp as claimed in claim 1 , wherein the support comprises from 2 to 40 channels configured to contain the coolant fluid.

Assignees

• Arkema France

Inventors

• Aubert Thierry
• Le Bec Rémi
• Delgado Fernand

Classifications

• H10W90/00

  Package configurations · CPC title

• C07C2601/18

  with a ring being at least seven-membered · CPC title

• H10H20/8586 Primary

  comprising fluids, e.g. heat-pipes · CPC title

• H10H20/8506

  Containers · CPC title

• H05B33/02 Primary

  Details · CPC title