30results about How to "Keep octane" patented technology

The invention relates to a FCC gasoline cleaning method. The method includes that under action of a prehydrogenation catalyst, catalytic cracking gasoline is in mercaptan etherification and double-bond isomerization reaction through a prehydrogenation reactor, prehydrogenation reaction efflux is cut and fractionated into light and heavy gasoline fraction, the light gasoline fraction is in superimposition reaction under action of a superimposition catalyst, the heavy gasoline fraction is subjected to selective hydrodesulfurization under action of a hydrodesulfurization-isomerization catalyst, and linear-chain olefin is isomerized to be single-branch-chain olefin or single-branch-chain paraffin; the heavy gasoline fraction after reaction enters an octane value restoration unit for double-branche-chain isomerization reaction under action of an isomerization catalyst; blending the light and heavy gasoline fraction to obtain a clean gasoline product with low olefin, ultralow sulfur contentand high octane value.

The invention relates to a method for producing clean gasoline from catalytic gasoline. The method comprises the following steps: under the action of a pre-hydrogenation catalyst, carrying out a thioletherification reaction and a double-bond isomerism reaction on catalytic gasoline in a pre-hydrogenation reactor; under the action of a hydrogenation desulfuration-isomerism catalyst, carrying out selective hydrodesulfurization on a pre-hydrogenation reaction effluent, wherein straight-chain olefin isomerism is single branched-chain olefin or single branched-chain alkane; further carrying out adouble-branched-chain isomerism reaction on a reaction effluent, thereby obtaining clean gasoline which is low in olefin content, super lo win sulfur content and high in octane rate.

The invention relates to a FCC gasoline upgrading method. FCC gasoline is subjected to a mercaptan etherification and double-bond isomerism reaction under the action of a prehydrogenation catalyst bya prehydrogenation reactor, a prehydrogenation reaction effluent is cut into light and heavy gasoline fractions, the light gasoline fraction is subjected to isomerization reaction under the action ofan isomerization catalyst, the heavy gasoline fraction is subjected to selective hydrodesulfurization under the action of a hydrodesulfurization-isomerization catalyst, and simultaneously, linear olefin is isomerized into single branched olefin or single branched paraffin; then, the heavy gasoline fraction after the reaction enters an octane number recovery unit and is in contact with an octane number recovery catalyst to be subjected to a double branched isomerization reaction; finally, the light and heavy gasoline fractions are blended to obtain a clean gasoline product with low olefin content, ultra low sulfur content and a high octane number.

The invention discloses a phosphorus and loading metal containing MFI structure molecular sieve. According to the phosphorus and loading metal containing MFI structure molecular sieve, n(SiO2)/n(Al2O3) is larger than 100; with P2O5 for calculation and the dry basis weight of the molecular sieve being a reference, the phosphorus content of the molecular sieve is 0.1-5wt%; with loading metal oxides for calculation and the dry basis weight of the molecular sieve being a reference, the loading metal content of the molecular sieve is 0.5-5wt%; the Al distribution parameter D of the molecular sieve meets the equation of 0.5<=D<=0.8; the proportion of the medium pore volume to the total pore volume of the molecular sieve is 15-30vt%; the proportion of the strong acid amount to the total acid amount of the molecular sieve is 60-80%, and the ratio of the amount of acid B to the amount of acid L is 20-100. The phosphorus and loading metal containing MFI structure molecular sieve serves as an active component for preparing catalysts or auxiliaries, and in a petroleum hydrocarbon catalytic cracking reaction, the gasoline octane value can be effectively increased while the gasoline yield is kept, or the gasoline yield is increased while the gasoline octane value is kept.

The invention relates to a gasoline desulfurization method. The gasoline desulfurization method comprises the following steps: subjecting a raw gasoline material to primary cutting so as to obtain a first light gasoline fraction and a first heavy gasoline fraction; conveying the first heavy gasoline fraction into a first set of fluidization reactor for contacting with an adsorption desulfurizationcatalyst and carrying out a first desulfurization reaction in the presence of hydrogen so as to obtain a first desulfurization product; conveying the first light gasoline fraction into a second set of fluidization reactor for contacting with the adsorption desulfurization catalyst and carrying out a second desulfurization reaction so as to obtain a second desulfurization product; subjecting the first desulfurization product to secondary cutting so as to obtain a second light gasoline fraction and a second heavy gasoline fraction; and subjecting the second desulfurization product and the second light gasoline fraction to etherification together so as to obtain etherified oil. The method provided by the invention can reduce the contents of sulfur and olefins in gasoline, decrease the octanenumber loss of the gasoline and maintain high gasoline yield.

The invention relates to the field of gasoline and diesel oil hydrodesulfurization catalysts, and provides a preparation method of an ultra-deep gasoline and diesel oil hydrodesulfurization catalyst,which comprises the following steps: by using a nitrogen-doped carbon material as a carrier, attaching an active component to the carrier by an impregnation method, performing drying and roasting to obtain the ultra-deep gasoline and diesel oil hydrodesulfurization catalyst, wherein the active component comprises a metal salt and an auxiliary metal salt. According to the invention, a nitrogen-doped carbon material is used as a carrier, and a traditional Co (Ni)-Mo (W) metal active phase is loaded to prepare the novel catalyst; compared with a Co (Ni)-Mo (W) hydrogenation catalyst commonly usedin the industry, the catalyst has the advantages that a nitrogen-doped carbon material formed by introducing N atoms with high charges and spin density into a carbon material has excellent electron donating characteristics, and the electron and morphology structures of a metal active phase can be effectively regulated and controlled through the anchoring effect and the electron donating effect, therefore, the catalyst has higher gasoline and diesel hydrogenation activity and desulfurization effect, and better reserves the octane number of gasoline.

The invention discloses a gasoline hydrogenation device. A full-fraction hydrogenation stabilizing tower is provided with a light petrol separation pipe; a product outlet in the bottom of the full-fraction hydrogenation stabilizing tower communicates with a material inlet of a prefractionator through a pipeline; a moderate petrol branching pipe is arranged at the top of the prefractionator, and the bottom of the prefractionator is connected with a heavy petrol separation pipe; the heavy petrol separation pipe is connected with a material inlet of a first-section hydrogenation device; a first-section hydrogenation product outlet of the first-section hydrogenation device communicates with a material inlet of a first-section desulphurization device; a liquid desulphurization product of the first-section desulphurization device communicates with a material inlet of a second-section hydrogenation device through a pipeline; the moderate petrol branching pipe communicates with a material inlet of the second-section hydrogenation device; a second-section hydrogenation product outlet of the second-section hydrogenation device communicates with a material inlet of a second-section desulphurization device; a liquid desulphurization product of the second-section desulphurization device communicates with a material inlet of a product stabilizing tower through a pipeline; a finished product outlet of the product stabilizing tower is connected with a refined petrol discharging pipe; the refined petrol discharging pipe communicates with the light petrol separation pipe.

The invention relates to a gasoline desulfurization method. The gasoline desulfurization method comprises the following steps: subjecting a raw gasoline material to cutting so as to obtain a light gasoline fraction and a heavy gasoline fraction; conveying the first heavy gasoline fraction into a first set of fluidization reactor for contacting with an adsorption desulfurization catalyst and carrying out a first desulfurization reaction in the presence of hydrogen so as to obtain a first desulfurization product; and conveying the obtained light gasoline fraction into a second set of fluidization reactor for contacting with the adsorption desulfurization catalyst and carrying out a second desulfurization reaction so as to obtain a second desulfurization product, wherein a first reaction temperature and a first reaction pressure in the first desulfurization reaction are 380 to 470 DEG C and 2.0 to 3.5 MPa, respectively, and a second reaction temperature and a second reaction pressure in the second desulfurization reaction are 360 to 450 DEG C and 1.5 to 3.0 MPa, respectively. The method provided by the invention can reduce the contents of sulfur and olefins in gasoline, decrease the octane number loss of the gasoline and maintain high gasoline yield.

The invention relates to a treating method for gasoline. The treating method comprises the following steps: cutting a raw gasoline material so as to obtain a light gasoline fraction and a heavy gasoline fraction; subjecting the light gasoline fraction to etherification so as to obtain etherified oil; and conveying the heavy gasoline fraction to a fluidization reactor for contacting with a mixed catalyst and carrying out desulphurization and aromatization in the presence of hydrogen so as to obtain a heavy gasoline product, wherein the mixed catalyst comprises an adsorption desulphurization catalyst and an olefin aromatization catalyst. The method provided by the invention can reduce the contents of sulfur and olefins in gasoline and maintain the octane number of the gasoline and high gasoline yield.

The invention relates to a modification method of catalytic gasoline. Under the effect of a pre-hydrogenation catalyst, sulfur alcohol etherification and double bond isomerism reactions are carried out on gasoline through a pre-hydrogenation reactor, an effluent of a pre-hydrogenation reaction is cut and fractionated into light and weight components, an isomerism reaction is carried out on the light component under the effect of an isomerism catalyst, the heavy component enters a desulfuration-octane value recovery reactor, a hydrogen desulfurization-isomerism catalyst and an octane value recovery catalyst are loaded inside the reactor, the heavy component is firstly in contact with the hydrogen desulfurization-isomerism catalyst, a selective hydrogen desulfurization-isomerism reaction iscarried out under the effect of the hydrogen desulfurization-isomerism catalyst, and simultaneously, straight chain olefin is isomerized into single branched chain olefin or single branched chain paraffin; the heavy component after the reaction is then in contact with the octane value recovery catalyst to carry out a double branched chain isomerism reaction; and finally the light and heavy fractions are blended to obtain a gasoline product with low olefin, ultra-low sulfur content and high octane value. The hydrogen desulfurization-isomerism catalyst and the octane value recovery catalyst arearranged inside the same reaction device, and the technology is simplified.