Cupric chromite

To continue the process, the fatty methyl esters are phase-separated from the glycerin (or glycerol—same thing, just to keep you on your toes), washed with water to remove any trace amounts of methanol and glycerin and dried. In a second reaction, the methyl esters are hydrogenated to get the fatty alcohols (in the southeast corner of Figure 15—2). The catalyst is usually a mixture of cupric chromite and cupric oxide in the form of a finely divided powder. Conversion of the triglycerides is about 95%. 

Copper chromate -Cupric chromite -Cupric oxide... 

Cupric chromite Cuprous chromite Cuprous oxide... 

The intermediate precipitate obtained by the reaction of copper nitrate with ammonium dichromate and ammonia has been shown to be Cu(0H)NH4Cr04,122 and the decomposition of the precipitate to give the catalyst to be formulated as in eq. 1.6, by an X-ray diffraction study by Stroupe, although the catalysts obtained by decomposition at sufficiently controlled low temperature (350°C) are amorphous.123 Catalysts previosly used in liquid-phase hydrogenation below 300°C often show crystalline cupric chromite to have been largely reduced to the cuprous chromite... 

Cupric Chromite, CuO.CraOj, is a black crystalline powder. ... 

Chromium copper oxide (Cr2Cu04) Copper chromite Copper chromium oxide Copper dichromium tetraoxide Cupric chromite EINECS 234-634-6. Used as a hydrogenation catalyst. Black... 

J. F. Persoz obtained cuprous chromite, CuCr02, by calcining cupric chromate in a crucible exposed to the reducing action of the furnace gases, and extracting the product with hydrochloric acid and L. and P. Wohler obtained it by heating one of the basic cupric chromites with an excess of cupric oxide above 900°, and... 

This is a grey-black or black copper compound with composition CuCt204 (also termed cupric chromite). It is also a component in a brown-black or black copper-chromium oxide pigment mentioned in the pigment hterature and said to be a mixture of CuCr204 and CuO. 

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