The invention discloses a blending-process method for producing environment-friendly rubber oil. The method provided by the invention comprises the following steps: 1) performing
solvent extraction on reduced-pressure
residual oil to obtain deasphalted oil, wherein a
solvent used for extraction is
propane; the volume ratio of the
solvent to the reduced-pressure
residual oil is (6-8):1; and extraction conditions are
tower-top temperature between 70 and 91 DEG C,
tower-bottom temperature between 57 and 80 DEG C and pressure between 3.8 and 7.0 MPa; 2) performing
solvent extraction on the deasphalted oil obtained in a step 1) to obtain heavy deasphalted oil, wherein the solvent used for extraction is
propane; the volume ratio of the solvent to the deasphalted oil is (6-8):1; and the extraction conditions are
tower-top temperature between 60and 80 DEG C, tower-bottom temperature between 50 and 70 DEG C and pressure between 2.8 and 3.9 MPa; and 3) mixing the heavy deasphalted oil obtained in a step 2) with naphthenic oil at a temperature between 70 and 90 DEG C for 30 to 120 minutes to obtain the environment-friendly rubber oil, wherein the
mass ratio of the heavy deasphalted oil to the naphthenic oil is (0.3-0.7):(0.7-0.3). The environment-friendly rubber oil has the
advantage of meeting the requirements of EU 2005 / 69 / EC environment-protecting directives, along with aromatic-carbon rate between 10 and 20 percent, PCA content of less than 3 percent, high
aromatic hydrocarbon content, environment-protecting property, no
toxicity and no carcinogenic effects. The environment-friendly rubber
oil can be used as a substitute for the prior aromatic oil, and has significant economic value.