Method for producing monocyclic ketones C7-C20

• US 20050203316A1
• Filed: 11/06/2002
• Published: 09/15/2005
• Est. Priority Date: 03/20/2002
• Status: Active Grant

• Current Assignee: Institut Kataliza Imeni GK Boreskova Sibirskogo Otdelenia Rossiliskoi Akademii NAUK
• Original Assignee: Institut Kataliza Imeni GK Boreskova Sibirskogo Otdelenia Rossiliskoi Akademii NAUK
• Inventors: Dubkov, Constantin Alexandrovich, Panov, Gennady Ivanovich, Starokon, Eygeny Vladimirovich, Ivanov, Dmitry Petrovich
• Granted Patent: US 7,105,704 B2
• Time in Patent Office: Days
• US Class Current: 568/365
• CPC Class Codes: C07C 45/28 of CHx-moieties

Abstract

The invention relates to a method for producing monocyclic ketones C₇-C₂₀.

The method of patent protection sought is based on the oxidation reaction of monocyclic alkenes C₇-C₂₀ into corresponding monocyclic ketones with nitrous oxide or a mixture thereof with inert gas. The process proceeds at a temperature ranging from 20 to 350° C. and a pressure of the nitrous oxide ranging from 0.01 to 100 atm. The process provides a high selectivity involving the target product, blast-resistant work operations and is promising for industrial use.

Claims

1. A method for producing monocyclic ketones C₇-C₂₀ by contacting nitrous oxide with liquid monocyclic alkenes of the formula C_nH_2n-2 containing 7-20 carbon atoms on the cycle, at a temperature comprised between 20 and 350°

C. and a pressure of N₂O ranging from 0.01 to 100 atm.

2. The method of claim 1, wherein a reaction mixture is added with an inert gas-diluent.

3. The method of claim 1, wherein the concentration of the inert gas in the reaction mixture does not exceed 99%.

4. The method of claim 1, wherein the concentration of the inert gas is selected in such a way as to preclude a possibility of dangerously explosive compositions being formed at each and every stage of the process.

5. The method of claim 1, wherein the concentration of the inert gas is selected in such a way as to preclude a possibility of dangerously explosive compositions being formed at all the stages of the process.

6. The method of claim 1, wherein the reaction is carried out at a temperature comprised between 20 and 199°

C. and a pressure of nitrous oxide of from 0.01 to 100 atm.

7. The method of claim 1, wherein the reaction is carried out at a temperature between 20 and 350°

C. and a pressure of nitrous oxide of from 0.01 to 20 atm.

8. The method of claim 1, wherein the reaction is carried out in the presence of a catalyst.

9. The method of claim 1, wherein the reaction is carried out in the presence of a solvent.

10. The method of claim 1, wherein the nitrous oxide comprises admixtures of other gases which do not impair process indices.

11. The method of claim 1, wherein the reaction is carried out in a static or flow-type reactor.

12. The method of claim 1, wherein recycling gases are used for conducting the reaction.