TH88593B - The process of preparing cyclohexanone and cyclohexanol. - Google Patents

Abstract

DC60 (31/03/49) The process for preparing cyclohexanone and cyclohexanol consists of (a) neutralization of acids and/or carbon dioxide present in the organic solution further composed of cyclohexyl hydroperoxide by mixing the organic solution with the first liquid alkaline solution to create the first mixture consisting of the first liquid layer and the first organic layer; (b) separation of the first liquid layer from the first organic layer; (c) removal of charges from the first liquid layer; (d) dissociation of cyclohexyl hydroperoxide present in the first organic layer by mixing the first organic layer mixture with the second liquid alkaline solution to create the second mixture consisting of the second liquid layer and the second organic layer containing cyclohexanone and cyclohexanol; (e) separation of the second liquid layer from the second organic layer; and (f) feeding at least the separated second liquid layer to neutralization (a), where the process is further composed of feeding the first liquid layer to the neutralization. Dissociation occurs at a pH of the first liquid layer above 8.5, measured at 25 °C. The preparation process of cyclohexanone and cyclohexanol consists of (a) neutralization of acids and/or carbon dioxide present in the organic solution further composed of cyclohexyl hydroperoxide by mixing the organic solution with the first liquid alkaline solution to create the first mixture consisting of the first liquid layer and the first organic layer; (b) separation of the first liquid layer from the first organic layer; (c) removal of charges from the first liquid layer; (d) dissociation of cyclohexyl hydroperoxide present in the first organic layer by mixing the first organic layer mixture with the second liquid alkaline solution to create the second mixture consisting of the second liquid layer and the second organic layer containing cyclohexanone and cyclohexanol; (e) separation of the second liquid layer from the second organic layer; and (f) feeding at least the separated second liquid layer to neutralization (a), where the process is further composed of feeding the first liquid layer to the neutralization process. It dissociates at a pH of over 8.5 in the first liquid layer, measured at 25 degrees Celsius.

Claims (13)

1. The process for preparing cyclohexanone and cyclohexanol consists of (a) neutralization of acids and/or carbon dioxide present in an organic solution further composed of cyclohexyl hydroperoxide by mixing the organic solution with a first alkaline solution to create a first mixture consisting of the first liquid layer and the first organic layer; (b) separation of the first liquid layer from the first mixture and from the first organic layer; (c) removal of charges from the first organic layer; (d) dissociation of cyclohexyl hydroperoxide present in the first organic layer by mixing the first organic layer with a second alkaline liquid solution to create a second mixture consisting of the second liquid layer and a second organic layer containing cyclohexanone and cyclohexanol; (e) separation of the second liquid layer from the second organic layer; and (f) feeding at least the separated second liquid layer to neutralization. (a) It is characterized by the process being further composed of feeding the first liquid layer. The first reaction occurs when the pH of the first liquid layer is higher than 8.5, as measured at 25 degrees Celsius. 2. The process described in Claim 1 is characterized by the invention's process consisting of the application of a portion of the first liquid layer to dissociation at a first liquid layer pH below 13, as measured at 25 °C. 3. The process described in Claim 1 is characterized by the invention's process involving the application of a first-stage liquid portion to dissociation at a first-stage liquid pH of 9-10, measured at 25°C. 4. The process under claim 1 is characterized by the quantity of a second, separated liquid layer fed to the neutralization process being such that the pH of the first liquid layer is higher than 8.5 as measured at 25°C. 5. The process under claim 2 is characterized by the quantity of a second, separated liquid layer fed to the neutralization process being such that the pH of the first liquid layer is lower than 13 as measured at 25°C. 6. The process under claim 3 is characterized by the amount of a second, separated liquid layer fed to the neutralization process being the amount that causes the pH of the first liquid layer to be between 9-10, as measured at 25°C. 7. Any of the processes described in claims 1-6 are characterized by the pH of the second liquid layer being higher than 13 as measured at 25°C. 8. Any of the processes under claims 1-7 have the characteristic that the process is further comprised of feeding a second, separable liquid layer to the dissociation (d). 9. Any of the processes under claims 1–8 are characterized by the division of such a second separable liquid into two parts by supplying the first part (part A) of the second separable liquid to the neutralization (a) and supplying the other part (part B) of the second separable liquid to the dissociation (d). 10. The process described in claim 9 is characterized by the first liquid alkaline solution being part A of the aforementioned separated second liquid layer, the second liquid alkaline solution being part B of the aforementioned separated second liquid layer, and the remaining part of the second alkaline solution being a liquid solution of alkali metal hydroxides. 11. The process under claim 10 is characterized by the quantity of alkali metal hydroxide solution, i.e., the quantity that causes the pH of the second liquid layer to exceed 13 as measured at 25 °C. 12. Any process under claim 9-11 is characterized by the quantity of the separable secondary liquid layer fed for dissociation being a volume ratio of the secondary liquid layer to the organic layer greater than 0.01 and less than 1. 13. Any of the processes under claims 1-12 are characterized by the addition of distillation of the remaining mixture containing a second organic layer to obtain cyclohexanone and cyclohexanol.