rubber processing oil ASTM method  : ASTM D611 and ASTM D1012

Most of petroleum products as well as RPO well known by their aniline point , especially those that are lighter, solvents used for other types of materials. Based on the type of hydrocarbon solvent power of the crude oil is changed. Aniline point of rubber processing oil was measured by a simple test and is done easily with available equipment in labratolary . In fact, this test solubility of aniline, an aromatic substance, measured in furfural extract rpo and other petroleum products. The solubility of other substances is related to the solubility of aniline. Aniline often somewhat soluble hydrocarbons and their solubility in any particular hydrocarbon mixtures increase with increasing temperature. When the mixture comes complete solubility temperature for a solution is transparent, opaque is mixed at lower temperatures. In this method, after raising the temperature again clear solution cools the temperature at which the mixture will become cloudy measures. The strength of aniline in hydrocarbons is greater solubility temperature at which turbidity first appears will be lower.Usually, the lowest solubility for paraffinic hydrocarbons aniline (and most other substances) and therefore have higher aniline point. The highest and the lowest point of aromatic solubility of aniline (usually room temperature), respectively, whereas among paraffin naphthenic and aromatics are material.

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