36results about How to "High olefin content" patented technology

A membrane process for the removal of sulfur species from a naphtha feed, in particular, a FCC light cat naphtha, without a substantial loss of olefin yield is disclosed. The process involves contacting a naphtha feed stream with a membrane having sufficient flux and selectivity to separate a sulfur deficient retentate fraction from a sulfur enriched permeate fraction, preferably, under pervaporation conditions. Sulfur deficient retentate fractions are useful directly into the gasoline pool. Sulfur-enriched permeate fractions are rich in sulfur containing aromatic and nonaromatic hydrocarbons and are further treated with conventional sulfur removal technologies, e.g. hydrotreating, to reduce sulfur content. The process of the invention provides high quality naphtha products having a reduced sulfur content and a high content of olefin compounds.

The invention provides a preparation method of cycloolefin copolymers. The preparation method comprises the steps of utilizing a half metallocene complex in a structure of a formula (I) as main catalysts, forming a salt ion active center after being acted with a cocatalyst, and thereby catalyzing the copolymerisation of ethylene and norbornene. On one hand, the existence of R in the half metallocene complex ensures the catalytic activity of a half metallocene system; the introduction of P, O or S atoms for the half metallocene complex improves the catalytic stability, therefore, the catalytic activity of the half metallocene complex is high; on the other hand, the introduction of aryloxy or aromatic sulfenyl further improves the charge properties and the space effects of a transition metal center, thereby being favorable for stabilizing a metal cation center; and the larger volume and an annual structure formed with the metal center also generate certain restriction to the spatial configuration of the half metallocene complex, therefore the generated cycloolefin copolymers through catalysis have high molecular weight, and at the same time, the method of the invention ensures that the content of the norbornene in the complex is high and can be regulated.

The present invention discloses polymer functionalized molecular sieve/polymer mixed matrix membranes (MMMs) with either no macrovoids or voids of less than several Angstroms at the interface of the polymer matrix and the molecular sieves by incorporating polymer functionalized molecular sieves into a continuous polymer matrix. The MMMs exhibit significantly enhanced selectivity and/or permeability over the polymer membranes made from the corresponding continuous polymer matrices for separations. The MMMs are suitable for a variety of liquid, gas, and vapor separations such as deep desulfurization of gasoline and diesel fuels, ethanol/water separations, pervaporation dehydration of aqueous/organic mixtures, CO₂/CH₄, CO₂/N₂, H₂/CH₄, O₂/N₂, olefin/paraffin, iso/normal paraffins separations, and other light gas mixture separations.

The invention discloses a hydrocarbon oil cracking method which comprises that: in a riser reactor comprising a plurality of reaction areas, the hydrocarbon oil raw material and the cracking catalyst are made a contact reaction in each reaction area under the condition of cracking reaction, the catalyst is separated from the reaction product to obtain the cracking product and spent catalyst, at least partial spent catalyst is regenerated to obtain the semi-regenerated catalyst and the regenerated catalyst, wherein, the reaction areas comprise at least one middle reaction area and at least one upper reaction area, the upper reaction area is positioned above the middle reaction area; the inferior heavy raw material and the semi-regenerated catalyst are imported in the middle reaction area to allow the heavy raw material to contact the semi-regenerated catalyst; the heavy raw material and the regenerated catalyst are imported in the upper reaction area to allow the heavy raw material to contact the regenerated catalyst. At least one item of the carbon residue content, the content of metal nickel and vanadium, the bitumencarb content and the basic nitrogen content of the inferior heavy raw material is higher than that of the heavy raw material. The method can optimize the cracking conditions of the hydrocarbon oil and improve the distribution of products.

The invention relates to an olefin oligomerization catalyst, which comprises an ethylchloride zirconyl alcohol adduct with the general formula of Zr (OR) mCl4-m . nROH, wherein m is an integer from 1 to 3, n is 2 to 8, and R is C3 to C8 chain alkyl. The preparation method of the catalyst is simple, the catalyst has higher oligomerization activity when being matched with an organic aluminum catalyst, the content of oligomer in the oligomerization product is low, the content of C12 to C20 olefin is higher, and the yield of alpha-olefin is high.

The invention provides a method for reducing sulfur content in gasoline. According to the invention, full-fraction gasoline is fractionated to obtain a light gasoline fraction, an intermediate gasoline fraction and a heavy gasoline fraction, wherein the light gasoline fraction is subjected to alkali washing and refining so as to remove mercaptan sulfur therein, the intermediate gasoline fraction enters into a first hydrogenation unit for catalytic reforming so as to obtain a reformed intermediate gasoline fraction with an increased octane number, the heavy gasoline fraction enters into a second hydrogenation unit and contacts with a selective hydrodesulfurization catalyst for selective hydrodesulfurization, and the refined light gasoline fraction, the reformed intermediate gasoline fraction and the hydrogenated heavy gasoline fraction are mixed to obtain a full-fraction gasoline fraction with ultra low content of sulfur. The obtained full-fraction gasoline product has total sulfur content of less than 10 mu g/g, and compared with a full-fraction gasoline raw material, loss of the octane number ROC of the full-fraction gasoline product is less than 1.0 unit.

The invention provides a method for maximally producing aromatic hydrocarbons from catalytic cracking gasoline. The method comprises pre-hydrogenating catalytic cracking gasoline to obtain pre-hydrogenated catalytic cracking gasoline, dividing the pre-hydrogenated catalytic cracking gasoline into a light fraction, a middle fraction and a heavy fraction, extracting the middle fraction through a solvent to obtain olefin-rich raffinate and aromatic-rich extract, carrying out mild aromatization on the light fraction and the raffinate to obtain an aromatization product, recovering the light olefinfrom the extract to obtain a light olefin and sulfur-rich oil, carrying out selective hydrodesulfurization on the heavy fraction and the sulfur-rich oil to obtain a desulfurized heavy fraction, and carrying out aromatic extraction or extraction rectification on the aromatization product and the desulfurized heavy fraction. The method realizes olefin reduction, desulfurization and octane value increasing treatment on catalytically cracked gasoline and maximizes aromatic hydrocarbon production.

The invention provides an aromatization catalyst and a preparation method, regeneration method and aromatization method thereof. The preparation method comprises mixing a zeolite molecular sieve and abinder to obtain a catalyst precursor, orderly performing ion exchange modification and first modification treatment on the catalyst precursor, and after hydrothermal treatment, carrying out active metal loading and second modification treatment to obtain the aromatization catalyst. A modification element used in the first modification is at least one selected from metals in the group IA, group VA and lanthanide line in the periodic table, the active metal is at least one element selected from elements in the group VIIB, group VIII, group IB and group IIB, and the modifying element used for the second modification is at least one element selected from elements in the group VA and lanthanide line in the periodic table. The aromatization catalyst has good carbon deposition resistance and high aromatization activity, can complete the aromatization reaction under mild conditions, and has high aromatic selectivity and a liquid yield of 98.5% or more.

The invention discloses a device for preparing methanol into propylene. The device comprises a first reactor, a first material conveying pipe, a second material conveying pipe, a third material conveying pipe, a cooling unit, a dimethyl ether separation tower, a heating furnace, a second reactor, a separation unit, a C4 rectifying tower, a circulating hydrocarbon pipeline and a steam pipeline. Theinvention further discloses a corresponding method for preparing methanol into propylene. Isobutane is separated from circulating hydrocarbons, and a first product stream obtained by carrying out thereaction for preparing methanol into dimethyl ether in the first reactor is divided into three streams, so that the temperature flying phenomenon of the reactor can be reduced through dispersed feeding matched with different temperatures, and meanwhile, the high-efficiency temperature control of the reactor can be facilitated by adjusting the gas-liquid ratio fed from a side line.

The present invention relates to a catalytic conversion process for improving the product distribution, characterized in that a feedstock oil of good quality is contacted with a hot regenerated catalyst having a lower activity in a reactor to carry out a cracking reaction, the reaction product is separated from the spent catalyst to be regenerated, then the reaction product is fed into a separation system, and the spent catalyst to be regenerated is stripped, regenerated and recycled in the process. The isobutene content in the liquefied petroleum gas (LPG) produced by the process is increased by a factor of more than 30%, and the olefin content in the gasoline composition may be increased to more than 30 wt. %. The product distribution is optimized, and the yields of dry gas and coke are decreased, so as to sufficiently utilize the petroleum resources.

Copolymers prepared by a reaction of (1) an unactivated olefin, (2) an activated olefin, and (3) a hydroxyl functional activated olefin and/or a hydroxyl functional unactivated olefin are described. The copolymers have a backbone of polar vinyl monomers and non-polar alkene monomers, with pendant hydroxyl functional groups. The copolymers are well suited for optically clear, pressure sensitive, polyurethane and/or barrier adhesives.

The invention relates to a coking gasoline processing technology, and belongs to the technical field of gasoline processing. The technology comprises carrying out a pre-hydrogenation reaction processon coker gasoline, wherein monoolefine in the coker gasoline is reserved in the step, fractionating the coker gasoline subjected to the pre-reaction to obtain gasoline with light fraction, medium fraction and heavy fraction, respectively treating according to the properties of each fraction, wherein the light fraction gasoline is directly used as a gasoline blending component, separating the medium fraction gasoline to obtain raffinate oil and extract oil, wherein the raffinate oil as a gasoline blending component, and sending the extract oil and the heavy fraction gasoline into a downstream device for reprocessing. According to the process, the characteristics of high olefin content and high octane number in the coking gasoline light component are fully considered, the yield of the high-octane number light component is increased through the sulfur transfer function of the pre-reaction, the processing flow is shortened, the processing energy consumption is reduced, and the process canbe used as an effective way for coking gasoline utilization.

The invention discloses a method for removing oxygen-containing compounds in Fischer-Tropsch synthetic oil, and belongs to the technical field of Fischer-Tropsch oil treatment. The method comprises the following steps: in a fixed bed reaction device, removing oxygen-containing compounds in Fischer-Tropsch synthetic oil to be treated by using sulfonic acid resin; the weight ratio of the sulfonic acid resin to the Fischer-Tropsch synthetic oil to be treated is 1: (100-200). According to the method, sulfonic acid resin and Fischer-Tropsch synthetic oil are subjected to a reaction, so that oxygen-containing compounds in the Fischer-Tropsch synthetic oil can be removed through the reaction under the condition of ensuring no loss of straight-chain olefins, and additional straight-chain olefins are generated at the same time, so that the olefin content in an oil product is greatly improved. In addition, the method is beneficial to prolonging the service life of the sulfonic acid resin, few by-products are generated, the influence on the purity of olefin is small, the energy consumption is low, and the economic benefit is high.

The invention belongs to the technical field of synthesis gas conversion, and particularly relates to a method for preparing olefin from synthesis gas, namely a reaction and separation integrated reaction device. According to the method for preparing olefin from synthesis gas, the synthesis gas is introduced into a closed reaction container for reaction, a catalyst bed is arranged in the closed reaction container, a flowing absorption solvent is introduced in the closed reaction container, and the catalyst bed is not in contact with the absorption solvent; the method comprises the following steps: introducing synthesis gas into the catalyst bed for catalytic reaction to obtain olefin gas, and absorbing the olefin gas by the flowing absorption solvent to obtain an absorption solution; desorbing the absorption solution to obtain desorption gas, wherein the main component of the desorption gas is olefin. According to the method for preparing the olefin from the synthesis gas, provided by the invention, the conversion per pass of the synthesis gas is improved, the olefin content in the mixed gas obtained after desorption is increased, and the contents of the raw material gas and other components difficult to separate are reduced, so that the subsequent separation difficulty of the product is reduced, and the production cost and the energy consumption are reduced.

The invention relates to a catalytic cracking method and a system. The catalytic cracking method comprises a combined process of catalytic cracking, hydro-upgrading and aromatic hydrocarbon extraction. According to the process, benzene, methylbenzene and xylene can be co-produced while low-carbon olefin is produced to the maximum extent, and product distribution is optimized.