ABSTRACT
Air pollution by odor from various industrial processes tends to be one of the most frequent sources of pollution complaints. The glass industry is a relatively minor source of industrial odors. The identity and concentration of odorants in air can be established by appropriate analytical methods. Knowledge of general correlations of odor perception to the chemical structure is helpful in predicting the effects of chemical changes on the intensity of odors. A wide range of odors may result according to the types of raw materials and solvents employed. Some of the typical odorants from the lacquer and enamelling industry include methyl methacrylate, acrolein, allyl sulphide, hydrogen sulphide, n-butyl mercaptan, and aldehydes. The inherent problems of semantics and legalism concentrate on areas in which there is general agreement that odors do exist and that some control of odor emission is required. The odors encountered as by-products from animal extractive processes closely resemble those secured from food processing and rendering plants.
