Sorbex technology

Soot formation Sorbates Sorbent fibers Sorbex systems Sorbex technology Sorbic acid... 

Citric Acid Separation. Citric acid [77-92-9] and other organic acids can be recovered from fermentation broths usiag the UOP Sorbex technology (90—92). The conventional means of recovering citric acid is by a lime and sulfuric acid process ia which the citric acid is first precipitated as a calcium salt and then reacidulated with sulfuric acid. However, this process generates significant by-products and thus can become iaefficient. 

J. A. Johnson and A. R. Oroskar, "Sorbex Technology for Industrial Scale Separation," iu H. G. Karge and J. Weitkamp, eds.. Zeolites as Catalysts,... 

Selective absorption of durene from heavy gasoline (bp 150—225°C) is possible using a version of UOP s Sorbex technology where the X zeoHte is made selective for durene by replacing the exchangeable sodium cations with lithium ions (16). 

Citric acid (Ruthven, 1997). In the separation of citric acid from fermentation liquors the Sorbex process can be used. In the conventional process neutralization is carried out with lime followed by acidification with sulphuric acid to produce calcium sulphate as waste. The Sorbex technology avoids lime and sulphuric acid wastage and calcium sulphate disposal. 

This chapter addresses the fundamentals of zeolite separation, starting with (i) impacts of adsorptive separation, a description of liquid phase adsorption, (ii) tools for adsorption development such as isotherms, pulse and breakthrough tests and (iii) requirements for appropriate zeolite characteristics in adsorption. Finally, speculative adsorption mechanisms are discussed. It is the author s intention that this chapter functions as a bridge to connect the readers to Chapters 7 and 8, Liquid Industrial Aromatics Adsorptive Separation and Liquid Industrial Non-Aromatics Adsorptive Separation, respectively. The industrial mode of operation, the UOP Sorbex technology, is described in Chapters 7 and 8. 

The Parex, Toray Aromax and Axens Eluxyl processes are the three adsorptive liquid technologies for the separation and purification of p-xylene practiced on a large scale today. The MX Sorbex process is the only liquid adsorptive process for the separation and purification of m-xylene practiced on an industrial scale. We now consider a few other liquid adsorptive applications using Sorbex technology for aromatics separation that have commercial promise but have not found wide application. 

Expansion of Sorbex technology to the production of m-xylene shows how the process concept can be used for multiple applications in separations that cannot be performed by other means. One can expect that, as demand for new, difficult to separate aromatics increases, the simulated moving bed liquid adsorption processes can provide a means for production. 

Business update plants and projects Mitsubishi gas chemical chooses UOP s MX sorbex technology. (2007) Chem. Eng. Prog, 103 (12),... 

There are three liquid-phase adsorption Sorbex technology-based separation processes for the production of olefins. The first two are the UOP C4 Olex and UOP Sorbutene processes and the third is the detergent Olex process(Cio i,5) [25, 26]. The three olefin separation processes share many similarities. The first similarity between the three olefin separation processes is that each one utilizes a proprietary adsorbent whose empirical formula is represented by Cation,([(A102)),(Si02)2] [27]. The cation type imparts the desired selectivity for the particular separation. This zeolite has a three-dimensional pore structure with pores running perpendicular to each other in the x, y and z planes [28]. The second similarity between the three olefin separation processes is the use of a mixed olefin/paraffin desorbent. The specifics of each desorbent composition are discussed in their corresponding sections. The third similarity is the fact that all three utilize the standard Sorbex bed allotment that enables them to achieve product purities in excess of 98%. The following sechons review each process in detail. 

Application The MaxEne process increases the ethylene yield from naphtha crackers by raising the concentration of normal paraffins (n-paraffins) in the naphtha-cracker feed. The MaxEne process is the newest application of UOP s Sorbex technology. The process uses adsorptive separation to separate C5-Cn naphtha into a rich n-paraffins stream and a stream depleted of n-paraffins. 

Application The MX Sorbex process recovers mefa-xylene (m-xylene) from mixed xylenes. UOP s innovative Sorbex technology uses adsorptive separation for highly efficient and selective recovery, at high purity, of molecular species that cannot be separated by conventional fractionation. 

A commercial example of the single-column SMB system is the Sorbex technology of UOP. Table 2 lists... 

Hoyle, W. Lancaster, M. In Clean Technology for Manufacturing Speciality Chemicals. The Royal Society of Chemistry Cambridge, UK, 2001 1—12 pp.Millard, M.T. Johnson, J.A. Kabza, R.G. Sorbex Technology—a versatile tool for novel separations. In UOP Technology Conference New Delhi, 1988. 

Commercial status UOP s Sorbex technology is widely used in refining and petrochemical plants. The first commercial MaxEne unit is being installed in China. 

Other versions of the sinwiated moving-bed process have been commercialized by Toray Industries. Inc. " and Mitsubishi Chemical Industries, Ltd." These processes vary from the Sorbex technology in detaib rather than in their basic concept. 

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