| In this paper, an innovatory technology was explored to prepare aromatic hydrocarbons plasticizer and rubber softener from catalytic heavy aromatic hydrocarbons which are commercial products from Anqing subsidiary company of China Petroleum & Chemical Corporation. This technology is advanced and particular in this field. After studying and comparing various technologies, we get the following results:For hydrogenation refinement technology, the refinement results (S, N remove and products chroma) are influenced by several factors with the sequence : hydrogen pressure>temperature>airspeed>the ratio of hydrogen to oil. The optimized technology conditions often vary with the selected catalyst. For example, if RN-10 is selected as catalyst for hydrogenation, the optimized preparation conditions are: 8.0MPa> 380℃, 0.5h-1 of air speed, 1000/1 of the ratio of hydrogen to oil. The hydrogenation method stabilizes the products more, but it increases the ratio of saturated hydrocarbons, so if the products produced by this method are used as plasticizer, their quality will be lessened much.The chroma and stability of products were ameliorated greatly by the decompression distillation method with the addition of anti-oxidant. Most of the sulphur , nitrogen compounds and colloids were first removed under the high vacuum (<5mmHg) distillation process, then the distillates of about 430℃ was gathered for aromatic hydrocarbons plasticizer usage. After comparing several antioxidants, we find the antioxidant A gets the best result. The chroma of products was lowered from greater than 25 to about 10, and it was still less than 20 after 30 days.For other non-hydrogenation technology, such as acid-base—clay refinement method, although the chroma and stability of product can also be improved to some extent, the pollution problem is serious. In order to solve this problem, large-scale and complexenvironmental equipments is necessary and this will increase the hardness of the realization of industry process at last. After taking all factors into account, we choose decompression distillation in the addition of anti-oxidant method as the AP series of aromatic hydrocarbons plasticizer pilot-plant preparation methods, and we have gotted great economic benefit & social benefit from these products. In the research of aromatic hydrocarbons plasticizer application and prescription, we find that AP series of aromatic hydrocarbons plasticizer was well compatible with PVC resin, and they can be used to soften most of common PVC products. Owing to the molecular structure and properties of AP series of aromatic hydrocarbons plasticizer, we suggest using them as plasticizer for fuscous PVC products. The amount of addition should be determined according to the products to be softened, for pressure-extended films > cable materials > leatheroid, the optimized plasticizer amount is about 20 percents. Toxity experiments showed the aromatic hydrocarbons plasticizer were low toxic materials. Another merit of this aromatic hydrocarbons plasticizer is its rather cheap price and the raw materials are abundant.The viscosity of softener can be controlled by the addition of softener tail oil, one effective approach is to concoct by oil slurry. Wax Oil is one type suitable of additives which can reduce the density and improve the quality of softeners. In our experiments, Aromatic hydrocarbons softeners are well compatible with rubber. The controllable viscosity ^ softening properties and content of aromatic hydrocarbons of these softeners satisfy the demands of all kinds of rubber products clients.
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