METHOD OF PREPARING PROTEIN-FOAMING AGENT Russian patent published in 1999 - IPC

FIELD: preparation of foam concrete and putting out fires. SUBSTANCE: method comprises adding lime, water to dry protein-containing microbic synthesis substance, and the resulting mixture is heated during period of time required for attaining foam forming activity (multiplicity and resistance). On completion of hydrolysis, mixture is cooled to room temperature and filtered. Metal salt, e.g Fe₂(SO₄)₃FeSO₄, CuSO₄, is added into filter. After 10-fold dilution with water, the resulting solution has multiplicity of foam of 10-17 and stability of 12-14 hours and is used as foaming agent. EFFECT: increased foaming power of protein foaming agent.