Method for removing metal from hydrocarbon oil using acrylic acid - acrylic ester copolymers
A technology of hydroxypropyl acrylate and acrylate, which is applied in refined hydrocarbon oil and petroleum industry, etc. It can solve the problems of inability to remove calcium and large dosage, and achieve the effect of small dosage and high removal efficiency
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Embodiment 1
[0016] This example uses acrylic acid-hydroxypropyl acrylate copolymer to demetallize calcium and iron.
[0017] The raw material oil used in the experiment was heavy oil in the ninth area of Karamay (calcium content 266ppm), the mixed oil of heavy oil in the ninth area of Karamay and kerosene with a ratio of 7:3 (calcium content 154ppm), the reduction of the mixed oil of crude oil in northern Xinjiang and crude oil in southern Xinjiang. Mixed oil of pressed residual oil and kerosene (calcium content 87.1ppm). The used acrylic acid-hydroxypropyl acrylate copolymer is commercially available (molecular weight 1000-50000, monomer ratio 11:1-1:2, produced by Water Quality Stabilizer Factory of Nanjing Institute of Chemical Technology).
[0018] The metal removal agent, water injection, and demulsifier are formulated into an aqueous solution according to a certain agent / calcium mass ratio and water injection rate, and the amount of demulsifier added is 50ppm. Fully mix the pre...
Embodiment 2
[0022] This embodiment uses acrylic acid-methyl acrylate copolymer (molecular weight 3000~20000, monomer ratio 4:1~5:1), acrylic acid-hydroxyethyl acrylate copolymer (molecular weight 3000~5000, monomer ratio 4:1~ 6:1) to remove metal calcium and iron in crude oil.
[0023] The test method is the same as that in Example 1. The crude oil used is a mixture of heavy oil and kerosene in the 9th district of Karamay, Xinjiang at a ratio of 7:3, wherein the calcium content is 154 ppm, and the iron content is 17.1 ppm. The results are shown in Table 2.
[0024] As can be seen from the results in Table 2, when the agent / calcium ratio is 1.5-2, both acrylic acid-methyl acrylate and acrylic acid-hydroxyethyl acrylate copolymers have good decalcification effects.
Embodiment 3
[0026] This embodiment uses acrylic acid-hydroxypropyl acrylate-methyl acrylate terpolymer to remove calcium in crude oil
[0027] The oil used in the test is Lanlian vacuum residue and kerosene mixed in a ratio of 4:1 (calcium content 87.1ppm, iron content 9.3), acrylic acid-hydroxypropyl acrylate-methyl acrylate terpolymer is the water treatment agent of Nacol Company of the United States NC-309 commodity, test method is the same with embodiment 1. The test results are shown in Table 3.
[0028] From the results in Table 3, it can be seen that the acrylic acid-hydroxypropyl acrylate-methyl acrylate terpolymer also has a good demetallization effect.
[0029] polymer type
[0030] demulsifier
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