Biodegradable oils and protection of the environment
2003
Rousek M.
The paper deals with the possibility of substituting mineral oils by biodegradable oils. After the analysis of properties and possibilities of the use of rape-seed oils of HETG type, it is stated that these oils show generally very low thermooxidation stability. One of the possibilities of dealing with the present conditions which corresponds to the Czech governmental programme of useful, economic but above all ecological solution of oil waste problems according to Law No. 125/97 Gaz. on wastes and its novella No. 167/98 Gaz. is the collection and subsequent recycling of oils on the rape-seed base. The objective is to improve thermooxidation stability of the oils. A basic idea consists in an assumption that through thermal load, considerable amount of double bonds decreased the bonds being the basic source of polymerization reactions, in other words thermooxidation instability of oil. Such an oil, under conditions of observing other important physical and chemical parameters, can be used after recycling as a filling for gearboxes or less loaded hydraulic systems of forest machines fulfilling strict requirements of Czech laws concerning forest protection. Results are presented of service life tests of raffinates and recycled oils. Comparisons with the behaviour of commonly recommended oils show that recycled oils rank among types of rape-seed oils with average properties. However, the thermooxidation stability of the oil was substantially improved, peroxide number was constant and the origin of hardenable polymerized deposits did not occur. Keywords: biodegradable oils; environment protection; gearbox; hydraulic circuits, recycling oils, reliability
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Эту запись предоставил Forest Research and Management Institute