Publikace detail

Recycling of copper used in Ullmann reaction

Autoři: Šimek Miroslav | Vyňuchal Jan | Weidlich Tomáš

Rok: 2014

Druh publikace: ostatní - článek ve sborníku

Název zdroje: EMEC 15 Book of Abstracts

Název nakladatele: Vysoké učení technické v Brně

Místo vydání: Brno

Strana od-do: 104

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
eng	Recycling of copper used in Ullmann reaction	The work describes application of powdered copper in Ullmann type C-C coupling reaction using derivative of bromoanthraquinone as the starting material. The mentioned Ullmann reaction is essential method used for the preparation of Pigment Red 177, important type of anthraquinone pigment. powdered copper is converted to the copper bromide (cuprous slurry). Raw CuBr is isolated as the undesirable by-product and it is contaminated with organic compounds. We were tested available techniques usefull for the conversion of obtained cuprous slurry to the powdered copper and recycling of this copper powder in the above mentioned Ullmann reaction. Prepared copper powders were tested in Ullmann reaction, the yield of desired coupling product reached 92 %.	biaryl; C-C coupling; chemical reduction

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