Method of removing halogenated aromatic compound from hydrocarbon oil
AssigneesResearch Institute for Production Development, Mitsui & Co., Ltd.
InventorsShuji Kitamura, Tsuneo Yano, Humio Tanimoto
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Abstract
A safe and reliable method of removing halogenated aromatic compounds present in small amounts in hydrocarbon oil constituted mainly by non-aromatic hydrocarbon oil. The hydrocarbon oil is contacted with a heat-resistant alkaline polar solvent in the presence of an alkaline at a temperature ranging from about 100.degree. C. to 300.degree. C., and the non-aromatic hydrocarbon oil and heat-resistant alkaline polar solvent are then separated, thereby removing the halogenated aromatic compounds from the hydrocarbon oil.
Claims22
A method of removing halogenated aromatic compounds from hydrocarbon oil, comprising:
- contacting hydrocarbon oil that includes non-aromatic hydrocarbon oil and contains a halogenated aromatic compound with a heat-resistant alkaline polar solvent in the presence of an alkali, and
- then separating the non-aromatic hydrocarbon oil and the heat-resistant alkaline polar solvent;
- in which the heat-resistant alkaline polar solvent is an organic solvent constituted by a mixture of 1, 3-dimethyl-2-imidazolidinone and sulfolane.
A method of removing halogenated aromatic compounds from hydrocarbon oil, comprising:
- contacting hydrocarbon oil that includes non-aromatic hydrocarbon oil and contains a halogenated aromatic compound with a heat-resistant alkaline polar solvent in the presence of an alkali;
- and
- then separating the non-aromatic hydrocarbon oil and the heat-resistant alkaline polar solvent;
- in which the heat-resistant alkaline polar solvent is an organic solvent constituted by 1,3-dimethyl -2-imadazolidinone.
The method according to claim 19, in which the alkali is constituted by one or more selected from a group consisting of caustic soda, caustic potash, sodium alcoholate, potassium alcoholate, and calcium hydroxide.
A method of removing halogenated aromatic compounds from hydrocarbon oil, comprising:
- contacting hydrocarbon oil that includes non-aromatic hydrocarbon oil and contains a halogenated aromatic compound with a heat-resistant alkaline polar solvent in the presence of an alkali;
- and
- then separating the non-aromatic hydrocarbon oil and the heat-resistant alkaline polar solvent;
- in which the heat-resistant alkaline polar solvent is an organic solvent constituted by sulfolane.
Dependencies are inferred from the claim text.