Study On The Preparation Of High Aromatic Environmental-friendly Rubber Oil From Vacuum Residue Of Liaohe Heavy Oil

Rubber oil is a kind of additive added to the production process of rubber products.It is used to improve the elasticity,flexibility,machinability and mixing properties of rubber.With the increasing awareness of environmental protection in the world,the traditional aromatic oil is unable to meet the relevant environmental regulations and is gradually eliminated by the market for it contains a large number of polycyclic aromatic hydrocarbons,which is highly carcinogenic,the research and development of environmental-friendly rubber oil has become the key to the sustainable and stable development of the rubber industry.At present,the Liaohe Petrochemical Company has developed a method of producing environmentally friendly rubber filling oil by hydrogenation and furfural refining,but the output is relatively low due to the limited amount of raw materials.In this paper,the process of producing environmental rubber oil by solvent deasphalting and furfural extraction combined with Liaohe heavy oil is developed.The effects of the properties of raw materials,operating temperature,number of settling tower and solvent types on the properties of deasphalted oil(DAO)are investigated.The feasibility of producing high aromatics environmental-friendly rubber filling oil by two different schemes of furfural extraction is further investigated by using light deasphalted oil(LDAO)as raw material.The test results show,by using the vacuum residuum as the raw material and propane as the solvent,under the three product flow scheme,setting the extraction tower and the settling tower temperature at 48? and 76? respectively,the pressure at 5 MPa and the ratio of the solvent to the oil at 4:1,a high-grade LDAO can be prepared.which is a high-quality raw material for the preparation of environmentally friendly rubber oil.Based on this kind of LDAO as the raw material,high aromatic environmentally rubber filling oil meeting the EU Reach standard can be obtained through two different schemes of furfural refining.when the operation is carried out under the program II process,setting the solvent to the oil at 3:1,and the temperature from the top of the tower to the bottom at 125?,120? and 115? respectively in the first furfural extraction;setting the solvent to the oil at 1.5:1,and the temperature from the top of the tower to the bottom at 100?,85? and 70? respectively in the secondary extraction.The CA value and the CN value are 29.9% and 29.5% respectively of the final rubber filling oil,its other properties are close to or even better than similar products abroad.The eight specific polycyclic aromatic hydrocarbons can not be detected by the SGS,and its PCA content is below 3%,which fully meets the EU Reach standard.It is proved preliminarily that it is feasible to prepare the environmental rubber filling oil by the solvent deasphalting and furfural extraction combined process using Liaohe low condensate oil mixed with East crude oil as raw material.It provides a new route for the processing of Liaohe residue for liaohe Petrochemical Industries,which is of great significance to the future development of Liaohe Petrochemical.