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Dow Aromatics Technical Services & Development (TS&D) department is committed to helping you find the best, most economical ways to use our products. Part of this commitment is to keep you informed of new technologies that may be of interest to you, such as new separation techniques, applications and chemistry.

Find a selection of interesting articles below:

Isoprene/Pentane Separation Using Facilitated Transport Membranes
The facilitated transport membranes, AgClO4-CA (cellulose acetate) and AgBF4-CA were prepared and tested for the separation of isoprene/pentane mixture.
Ref: S.H. Kim et al. / Journal of Membrane Science 233 (2004) 113–117 (109KB PDF)

Partial Hydrogenation of Dicyclopentadiene (DCPD)
DihydroDCPD has applications as a feedstock in the fragrance industry. Production of this semi-hydrogenated product from DCPD must be done carefully to avoid over hydrogenation to the tetrahydroDCPD. It has been proposed now to conduct the hydrogenation in the presence of a hydrogenated C4-raffinate stream.
Ref: U.S. Patent Application 2005/0038303, Feb.17, 2005, K.Webber, to Lyondell Chemical Company (412KB PDF).

Aromatization of C5
A catalyst for aromatization of a 1-pentene/n-pentane mixture (unsaturated C5 stream) to BTX is described in a patent application assigned to Enichem and Enitecnologie. The catalyst with best performance is GaNd-ZSM-5.
Ref: U.S.2004/0236165, Nov.25, 2004, A.Carati et al.

Isoprene Telomerization with Methanol
Isoprene can be reacted in a telomerization reaction with methanol to a lC10 derivative, dimethyloctadiene. This compound may be a starting point for a number of specialty derivatives such as fragrances. The naturally occurring terpenes are composed of isoprene building blocks. Synthesis of these molecules is only possible by multi-step routes. The telomerization process offers a one-step route to functionalized terpenes.
Ref: A.Behr, T.Fischer, M.Grote, D.Schnitzmeier, Chem.Ing.Techn. 74 (11) (2002) 1586-1591

High Purity DCPD from C5
A patent application assigned to Samsung (Korea) discusses the production of highly pure DCPD (at least 99.5%) from a C5 fraction. This patent is based on work apparently done in Russia at the Kazan State Technological University, Kazan. The inventors are Russians who have also published this earlier (see Ref.2). This technology is an improvement over Russian technology from VNIIOS that was developed in the 1980s using a gas phase DCPD monomerization step.
Ref. 1: WO 02/36529 A1, May 10, 2002 to Samsung General Chemicals Co., Ltd.
Ref. 2: Nurullina et al., Russian Journal of Applied Chemistry, (2001), 74 (9), 1590-93

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