Process for producing dearomatized component from reformat of gasoline fraction for production of petroleum solvents

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: in particular, invention aims at producing extraction dearomatized component from reformat of gasoline fraction, which component may be used in production of petroleum solvents such as hexane solvents. Process comprising countercurrent extraction of aromatic hydrocarbons with liquid selective extractant to separate dearomatized component (raffinate) and subsequent extractive rectification of resulting extract phase by distilling off aromatic hydrocarbons is characterized by that liquid selective extractant is diethylene glycol or triethylene glycol, countercurrent extraction is carried out at 125-140°C, extractive rectification is carried out using process steam in presence of saturated selective extractant wherein evaporation of water is performed with the aid of energetic steam, unsaturated selective extractant after extractive rectification and recycled gasoline are sent to extraction stage preliminarily using unsaturated selective extractant as heat carrier to generate process steam, and energetic steam condensate is used to heat recycled gasoline to 80-130°C.

EFFECT: enhanced process efficiency.

3 cl, 1 dwg, 1 tbl, 3 ex

 



 

Same patents:

FIELD: petroleum processing.

SUBSTANCE: crude oil is subjected to electrodesalting, atmospheric and/or vacuum distillation, secondary distillation of stable gasoline fractions to form light unstable gasoline, which is subjected to hydrofining. Resulting hydrofined fraction is reformed in presence of catalyst to give unstable catalysate. The latter is stripped on stabilization column to remove C1-C3 fraction, while top of the column is cooled by means of sharp reflux line and withdrawal of stable catalysate. Sharp reflux line is continuously supplemented by light unstable gasoline in proportion of 9.1 to 26.8% of the weight of unstable catalysate. Temperature of column top is maintained at no higher than 67°C and that of the bottom not lower than 164°C.

EFFECT: improved quality of target product.

3 cl, 4 tbl

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: catalytic reforming process involving hydrocarbon feedstock having gasoline boiling range in presence of hydrogen comprises following stages: performing reforming of at least 5% and not more than 50% of the total amount of feed on the first reforming plant including fixed bed of catalyst particles; transferring first reforming plant effluent to separation zone including separator and stabilization column to produce hydrogen-enriched gas stream, C4-hydrocarbon stream, and first reforming product; performing reforming of the rest of feedstock on the second reforming plant including one or more in series connected reaction zones, each accommodating fluidized catalyst beds and which are operated under continuous catalyst regeneration mode; transferring second reforming plant effluent to separation zone including separator and stabilization column to produce hydrogen-enriched gas stream, C4-hydrocarbon stream and second reforming product.

EFFECT: increased productivity of high-octane gasoline production process.

9 cl, 6 dwg, 4 ex

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: long gasoline fraction is divided into two streams, one of them being subjected to reforming process on industrial Pt-eryonite-containing catalyst SG-3P at 475-480°C, pressure 1.5-2.0 MPa, and volumetric feedstock flow rate 2.8-4.2 h-1, and the other being processed on platinum-rhenium catalyst KP-108 at 500-520°C, pressure 1.5-2.0 MPa, and volumetric feedstock flow rate 1.2-1.7 h-1. Before processing of the second stream, it is supplemented with 5-25% of the first-stream reforming product containing at least 8% of methylcyclopentane hydrocarbons.

EFFECT: simplified technology and increased octane number of reforming process.

2 ex

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: straight-run gasoline fractions are subjected to preliminary dehydration followed by reforming of resulting product in a system consisting of several in series arranged reactors. Dehydration and reforming operations are conducted on industrial Pt-eryonite catalyst (SG-3P) pretreated for 10-12 h with nitrogen at 100-130°C and then with hydrogen or hydrogen-containing gas while gradually raising temperature from 120°C to 480°C for 12 h and subsequent ageing at 480°C during 2-4 h. Dehydration temperature is 410-450°C and temperature of reforming in all reforming reactors is 475-490°C.

EFFECT: increased yield and octane number of reforming product.

2 ex

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: straight-run hydrofined gasoline fraction is subjected to catalytic reforming. Gasoline portion of reaction mixture, prior to feeding into the last reactor, is separated into top, median, and residual fractions boiling in following ranges: boiling start-(85-95)°C, (85-95)-(150-155)°Cm and (150-155)°C-dry point, respectively. Median fraction is brought into contact with alumino-platinum catalyst in last reactor and top and residual fractions are combined with last reactor product.

EFFECT: increased yield of desired product.

1 tbl, 4 ex

FIELD: petroleum processing and petrochemistry.

SUBSTANCE: hydrocarbon feed is converted in presence of porous catalyst at 250-500°C and pressure not higher than 2.5 MPa, feed uptake being not higher than 10 h-1. Hydrocarbon feed utilized are various-origin hydrocarbon distillates with dry point not higher than 400°C. Catalyst is selected from various aluminosilicate-type zeolites, gallosilicates, galloaluminosilicate, ferrosilicates, ferroaluminosilicates, chromosilicates, and chromoaluminosilicates with different elements incorporated into structure in synthesis stage. Resulting C1-C5-hydrocarbons are separated from gasoline and diesel fuel in separator and passed to second reactor filled with porous catalyst, wherein C1-C5-hydrocarbons are converted into concentrate of aromatic hydrocarbons with summary content of aromatics at least 95 wt %. In other embodiments of invention, products leaving second reactor are separated into gas and high-octane fraction. The latter is combined with straight-run gasoline fraction distilled from initial hydrocarbon feedstock.

EFFECT: increased average production of liquid products.

18 cl, 3 dwg, 9 ex

The invention relates to the field of oil and can be used in the production of high-octane gasoline

The invention relates to technology for processing gasoline fractions, namely the preparation of gasoline fractions to catalytic processes for producing high-octane components of gasoline, and can be used for removal of organochlorine compounds (hereinafter HOS) from raw materials of Hydrotreating and reforming

The invention relates to methods of producing aromatic hydrocarbons from a hydrocarbon and can be used in the refining and petrochemical industry

The invention relates to methods of cleaning oil from sulphides and can be used in refining and petrochemical industries

The invention relates to the field of chemical technology and can be used in solvent extraction processes, in particular, in oil refining installations selective treatment of the oil fractions of different solvents, such as phenol, furfural, N-dimethylpyrimidin and others, is that selective cleaning is carried out by countercurrent contact of the raw material introduced into the middle part of the extractor, the solvent is introduced into the upper part of the extractor, in the presence of antibacterial supplied to the lower part of the extractor, with the selection of the extractor between the input of raw materials and input antibacterial intermediate extract solution and supplied together with a portion of the raffinate was cooled to a temperature not exceeding the temperature ravintola solution discharged from the top of the extractor, heat exchanger for mixing, interaction and cooling and enter cooled combined stream coming from the heat exchanger, the extractor below the selection of the intermediate extract solution, with subsequent regeneration of the solvent from the formed ravintola solution discharged from the top of the extractor, and the extract solution is available

The invention relates to the field of chemical technology and can be used in solvent extraction processes, in particular, in oil refining installations selective treatment of the oil fractions of different solvents, such as phenol, furfural, N-dimethylpyrimidin and others, is that selective cleaning is carried out by countercurrent contact of the raw material introduced into the middle part of the extractor, the solvent is introduced into the upper part of the extractor, in the presence of antibacterial supplied to the lower part of the extractor, with the selection of the extractor between the input of raw materials and input antibacterial intermediate extract solution and supplied together with the part ravintola solution discharged from the top of the extractor, heat exchanger for mixing, interaction and cooling and enter cooled combined stream coming from the heat exchanger, the extractor below the selection of the intermediate extract solution and subsequent regeneration of the solvent from the formed ravintola solution discharged from the top of the extractor, and the extract solution discharged from the bottom of the extractor, with the receipt of the raffinate and extract
The invention relates to the refining, in particular to the purification of crude oil selective solvents

The invention relates to the refining industry and can be used for separation of aromatic hydrocarbons from dewaxed fraction 200 - 320oC - denormalization installations "Parex"

The invention relates to chemical technology and can be used in solvent extraction processes, in particular in the oil plants oil selective treatment of fractions of different solvents, such as phenol, furfural, N-organic, etc

The invention relates to the field of chemical technology and can be used in solvent extraction processes, in particular in the oil plants oil selective treatment of fractions of different solvents, such as phenol, furfural, N-organic, etc

The invention relates to chemical technology and can be used in solvent extraction processes, in particular in the oil installations selective treatment oil fractions

The invention relates to chemical technology and can be used in solvent extraction processes, in particular in the oil installations selective treatment oil fractions

FIELD: petroleum processing.

SUBSTANCE: separation of crude C4-fraction comprises rectification of C4-fraction containing butanes, butenes, 1,3-butadiene, and small amounts of other hydrocarbons, including C4-acetylenes, 1,2-butadiene, and C5-hydrocarbons, via extractive distillation using selective solvent. Crude C4-fraction is fed to middle part of first extractive distillation column and selective solvent is added to column above crude C4-fraction introduction point. Vaporous side stream containing C4-acetylenes together with 1,3-butadiene1,2-butadiene, C5-hydrocarbons, and selective solvent, wherein concentration of C4-acetylenes is below self-decomposition threshold, is withdrawn from the first distillation column from the point below crude C4-fraction introduction point. Top stream containing crude C4-fraction components, which are less soluble in selective solvent than C4-acetylenes, are withdrawn from upper part of the first extractive distillation column.

EFFECT: optimized order of process operations.

21 cl, 1 dwg

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