Abstract: In a process of preparing blood cell protein and haem by splitting haemoglobin under the influence of an acid and an organic solvent, the haemoglobin is first contacted with methanol and water and/or ethanol under turbulent conditions at a temperature of 20.degree. to 50.degree. C., whereafter the mixture thus obtained is mixed under turbulent conditions with a mixture of organic solvent and acid, preferably hydrochloric acid. The separation of the dispersion obtained is carried out in hydrocyclones and the recuperated organic solvent is at least partly recycled into the process.

Abstract: Tasteless and odourless blood cell protein isolate and heme are prepared from hemoglobin by converting the hemoglobin into a solid form by dehydration and extracting the heme from the solid product by solvent extraction with an organic solvent, preferably methanol or a methanol/ethanol mixture or a methanol/ethanol/water mixture, in the presence of acid, preferably hydrochloric acid, and recovering the blood cell protein isolate from the extraction residue. The acid may also be added to the hemoglobin before its conversion into the solid form.