DECOLOURIZED PREPARATIONS CONTAINING FORMED ELEMENTS OF BLOOD, PROCESS FOR THEIR PREPARATION AS WELL AS FOOD- AND FEED-ADDITIVES CONTAINING THE SAME AND PROCESSES FOR PREPARATION OF THE LATTER

摘要

A process for the preparation of decolourized products containing formed elements of blood such as full blood powder, hemoglobin powder, blood concentrates and processes to prepare food additives and foods of the same, from solutions, suspensions or emulsions containing formed elements of blood, by adding anticoagulants, opening the formed elements of blood containing hemoglobin by known methods, and if desired concentrating the compositions thus obtained and/or freeze drying the same. The invention is performed by adjusting the pH value of the mixture containing the open formed elements and the hemoglobin to pH = 1-2, treating the mixture with an oxidizing agent in the presence of a carbohydrate derivative containing a dienol-group, if desired dialyzing the solution thus obtained to eliminate the by-products, concentrating the solution until a dry substance content of 10-40 % w/v is obtained before or after adjusting the pH value to 7-7.5 and - if desired - freeze drying the product.