A kind of production method of rubber filler oil
A technology for rubber filler oil and production method, which is applied in the petroleum industry, hydrocarbon distillation, etc., can solve the problems of low yield of environmentally friendly rubber filler oil, difficulty in increasing the aromatic carbon rate, etc., so as to be suitable for large-scale promotion and improve production efficiency. , the effect of easily controllable conditions
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Embodiment 1
[0036] The raw material oil used in this example is the extracted oil of the third-line distillate oil produced by a refinery. Its distillation range is 350-450 ° C, its PCA content is 28 wt%, and the total content of eight carcinogenic aromatic hydrocarbons is 237 μg / g. Wherein the content of benzo[a]pyrene is 8μg / g; the first solvent is furfural; the second solvent is the mixture of n-nonane, ethylcyclohexane and dodecylbenzene, wherein n-nonane: ethyl Cyclohexane:dodecylbenzene=65:30:5 (volume ratio), the boiling range of the second solvent is 130-300°C. First solvent: raw material oil: second solvent=2.5:1:0.5 (weight ratio).
[0037] In this embodiment, a small extraction tower is used for solvent extraction. The inner diameter of the extraction tower is 33mm and the height is 3m, wherein the first extraction section is 2m high (that is, the distance between the first feed port and the third feed port) , the second extraction section is 1m high (that is, the distance bet...
Embodiment 2
[0041] In this embodiment, the raw oil, the first solvent, the second solvent and the extraction tower are completely consistent with those in Embodiment 1. Wherein, the first solvent: raw material oil: second solvent=3.0:1:0.7 (weight ratio).
[0042] Such as figure 1 As shown, the first solvent enters from the first feed port on the top of the extraction tower 1, the raw material oil enters from the third feed port on the lower part of the extraction tower 1, and the second solvent enters from the second feed port on the bottom of the extraction tower 1. The feed port enters, and the temperature of the first extraction section is controlled to be 50-65°C from bottom to top, and the temperature of the second extraction section is 40-50°C from bottom to top. After 10 hours of operation, the extraction towers are collected separately 1 top raffinate and extraction tower 1 bottom extract. The raffinate then enters the solvent recovery system 8, is heated and evaporated to reco...
Embodiment 3
[0045] The raw material oil used in this example is the extracted oil produced by a certain oil refinery, with a distillation range of 400-600°C, a PCA content of 32%, and a total content of eight carcinogenic aromatic hydrocarbons of 259 μg / g , wherein the content of benzo[a]pyrene is 14 μg / g; the first solvent is furfural; the second solvent is obtained by mixing n-dodecane and methylcyclohexane with a volume ratio of 1:1; the first solvent : raw material oil: second solvent = 2.5:1:0.7 (weight ratio).
[0046] Solvent extraction was carried out using an extraction tower exactly the same as in Example 1. Such as figure 1 Shown, make the first solvent enter from the first inlet of extraction tower 1 top, raw material oil enters from the third inlet of extraction tower 1 middle and lower parts, and the second solvent enters from the second inlet of extraction tower 1 bottom. The feed port enters, and the temperature of the first extraction section is controlled to be 70-90°C...
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