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PROCESS FOR REFINING A VACUUM RESIDUE TYPE HYDROCARBONATE LOAD USING SELECTIVE DESASPHALTAGE, HYDROTREATMENT AND CONVERSION OF THE VACUUM RESIDUE FOR THE PRODUCTION OF GASOLINE AND LIGHT OLEFINS
PROCESS FOR REFINING A VACUUM RESIDUE TYPE HYDROCARBONATE LOAD USING SELECTIVE DESASPHALTAGE, HYDROTREATMENT AND CONVERSION OF THE VACUUM RESIDUE FOR THE PRODUCTION OF GASOLINE AND LIGHT OLEFINS
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机译:使用选择性脱盐,加氢处理和转化减压渣油来生产汽油和轻质烯烃的减压渣油形式的碳氢化合物的方法
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摘要
The invention relates to a process for refining a heavy feedstock of the vacuum residue type. Selective deasphalting of the feedstock is conducted in a single-stage liquid/liquid extraction in an extractant. Extraction is carried out by means of a mixture of at least one polar solvent and at least one apolar solvent, to obtain an asphalt phase and a deasphalted oil (DAO) phase. The proportions of polar solvent and apolar solvent in the solvent mixture are adjusted according to properties of the feedstock, desired yield of asphalt and/or desired quality of the DAO. Deasphalting is implemented under subcritical conditions. At least a part of the DAO is subjected to hydrotreatment. At least a part of the effluent originating from the hydrotreatment is subjected to catalytic cracking in at least one fluidized-bed reactor under conditions allowing a gasoline fraction and/or a light olefins fraction to be produced.
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