Cyclohexane traditional process

One pass through this process at 400 psi results in 100% conversion of the benzene to cyclohexane with purity of about 99%. The economies compared to the traditional processing scheme come from energy savings and simple equipment. In addition, the catalyst circulation system lends itself to fine control since deactivated catalysts can easily be replaced on the fly without shutting down the system. 

To date, it seems that the most sustainable approach is the one that combines the use of cheap raw materials, for example, cyclohexane, benzene or phenol, with oxygen as the terminal oxidant. Within this context, a process that does not use acetic acid in the aerial oxidation of the KA Oil into AA or, even better, in the direct oxidation of cyclohexane to AA would represent a significant step forward towards a new and sustainable synthesis. On the other hand, recent examples demonstrate that even the traditional process making use of nitric acid for the oxidation of KA Oil may be turned into an intrinsically green one that is economically sustainable due to the use of the co-produced N2O in down-stream applications. 

A traditional catalyzed cyclohexane oxidation process consists of an oxidation and heat recovery section, a neutralization and decomposition section, a cyclohexane recovery section, a cyclohexanone separation and purification section, and finally a cyclohexanol dehydrogenation section. A simplified diagram of such a catalyzed cyclohexane oxidation process that is operated in a continuous mode is shown in the following ... 

DSM developed the noncatalyzed DSM Oxanone cyclohexane oxidation process in order to overcome the disadvantages of the traditional catalyzed cyclohexane oxidation process, namely, high cyclohexane and NaOH consumption figures and a large number of downtime hours. In addition, the DSM Oxanone process produces, after decomposition of CHHP, a KA oil with a KA ratio of more than 1.5 that requires a cyclohexanol dehydrogenation section with just a limited capacity. 

The new modular, decentralized plant concept for on-site production will be opposed to traditional chargewise processing in multiproduct and multipurpose plants. As potential process examples, the synthesis of organic peroxides (liquid-liquid) and the oxidation of cyclohexane with air (gas-liquid) were initially selected,... 

Compared to the traditional technology, the direct oxidation of cyclohexane with air or oxygen, also called the One Step AA process, should lower the total investment cost. This is due to the following differences ... 

Description GTC s GT-BenZap process features a reliable traditional design paired with a proven active hydrogenation catalyst. The process consists of hydrotreating a narrow-cut Cg fraction, which is separated from the full-range reformate to saturate the benzene component into cyclohexane. The reformate is first fed to a reformate splitter, where the Cg heart cut is separated as a side-draw fraction while the C/ cut and the Cg- light fraction are removed as bottom and top products of the column. 

Practical applications of [C mimBFJ/TX-lOO/cyclohexane microemulsions include reaction media for kinetic studies and synthesis of metal NPs. For instance, the rate constant for aminolysis of an ester at the interface of this IL/oil microemulsion is between two and four times higher than in traditional W/oil microemulsions. However, the rate constant is at least five times higher in pure water than in the [C mim][BFJ [32]. An example is a medium to prepare stable silver NPs, with an average diameter of approximately 3 nm, in the absence of any other auxiliary solvent in the whole process [33], [C mim][BF ]/TX-100/cyclohexane microemulsions were recently used as a new method for the preparation of monodispersed palladium NPs [34],... 

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