41results about How to "Increase aromatics yield" patented technology

One exemplary embodiment can be a catalyst for catalytic reforming of naphtha. The catalyst can have a noble metal including one or more of platinum, palladium, rhodium, ruthenium, osmium, and iridium, at least two alkali metals or at least two alkaline earth metals, or mixtures of alkali metals and alkaline earth metals and a support.

The invention relates to a catalyst for preparing aromatics by use of methanol and a preparation method of the catalyst, aiming at solving the problem that the catalyst in the prior art has low reaction activity. The catalyst is prepared from the following raw materials in parts by weight: (a) 25-85 parts of SAPO-34 / ZSM-5 composite molecular sieve; (b) 1-10 parts of metal element; and (c) 10-70 parts of structural promoter. The catalyst can solve the above problem well and can be used for industrial production for preparing aromatics by use of methanol.

Methods are provided for improving the yield of aromatics during conversion of oxygenate feeds. An oxygenate feed can contain a mixture of oxygenate compounds, including one or more compounds with a hydrogen index of less than 2, so that an effective hydrogen index of the mixture of oxygenates is between about 1.4 and 1.9. Methods are also provided for converting a mixture of oxygenates with an effective hydrogen index greater than about 1 with a pyrolysis oil co-feed. The difficulties in co-processing a pyrolysis oil can be reduced or minimized by staging the introduction of pyrolysis oil into a reaction system. This can allow varying mixtures of pyrolysis oil and methanol, or another oxygenate feed, to be introduced into a reaction system at various feed entry points.

The invention provides a process for producing a high-octane gasoline component. The process comprises the following steps of: mixing enriched C4, C5 and C6 alkane with hydrogen; feeding the mixture into a reactor containing a dehydrogenation catalyst and performing an alkane dehydrogenation reaction; treating a dehydrogenation product through a non-condensable gas separating device; then mixing with a raw material rich in alkane; and then transferring the mixture into a reactor containing an aromatization catalyst and aromizing to produce a low-benzene high-octane gasoline component rich in aromatic hydrocarbon. The modified gasoline is high in content of non-benzenoid aromatics, lower in content of benzene and low in content of olefin.

A process for reforming a hydrocarbon stream is presented. The process involves splitting a naphtha feedstream to at least two feedstreams and passing each feedstream to separation reformers. The reformers are operated under different conditions to utilize the differences in the reaction properties of the different hydrocarbon components. The process utilizes a common catalyst, and common downstream processes for recovering the desired aromatic compounds generated.

One exemplary embodiment can be a catalyst for catalytic reforming of naphtha. The catalyst can have a noble metal including one or more of platinum, palladium, rhodium, ruthenium, osmium, and iridium, at least two alkali metals or at least two alkaline earth metals, or mixtures of alkali metals and alkaline earth metals and a support.

A process is presented for the increasing the yields of aromatics from reforming a hydrocarbon feedstream. The process includes splitting a naphtha feedstream into a light hydrocarbon stream, and a heavier stream having a relatively rich concentration of naphthenes. The heavy stream is reformed to convert the naphthenes to aromatics and the resulting product stream is further reformed with the light hydrocarbon stream to increase the aromatics yields. The process includes passing a catalyst stream in a counter-current flow relative to the hydrocarbon process stream.

The invention relates to a reaction system for preparing aromatic hydrocarbon through catalytic conversion of methanol and a reaction method thereof, and mainly solves the problem of low aromatic hydrocarbon yield in the prior art. According to the invention, a methanol raw material enters a methanol reaction zone of a fluidized bed reactor and is subjected to a contact reaction with a modified ZSM-5 catalyst; the obtained spent catalyst enters a riser regenerator through a spent inclined pipe; the obtained semi-regenerated catalyst enters a riser regeneration cyclone separator connected withthe riser regenerator; the separated semi-regenerated catalyst enters a fluidized bed regenerator and is regenerated; the obtained regenerated catalyst enters a degassing zone through a regeneration inclined pipe, the degassed regenerated catalyst enters a light hydrocarbon reaction zone through a vertical pipe and is subjected to a contact reaction with a light hydrocarbon raw material, and the obtained semi-spent catalyst descends in a descending zone and enters a methanol reaction zone, so that the problems are well solved, and the reaction system and reaction method can be used for industrial production of aromatic hydrocarbons.

Methods and systems utilizing gas jets to carry biomass into a biomass conversion reactor are described. Reactor configurations and conditions for carrying out processes utilizing the gas jets are also described. The use of gas jets has been found to be especially desirable for operation with pyrolysis of biomass in catalytic fluidized bed reactors.

The invention relates to a technique for processing methanol-to-propylene by-products. The technique is characterized by comprising the steps as follows: a liquid hydrocarbon by-product of methanol-to-propylene (MTP) is separated to obtain a dry gas, a liquefied gas and C5<+> non-aromatic and aromatic hydrocarbons after passing through two sections of fixed bed reactors of olefin aromatization and alkane aromatization; the dry gas and aromatic hydrocarbon are discharged out of a reaction system as products; the C5<+> non-aromatic hydrocarbon is returned to the alkane aromatization reactor to continue to react; the liquefied gas and the liquefied gas of the MTP process by-product enter the alkane aromatization reactor; a heat source required for aromatization of the liquefied gas is provided by a mode of adding methanol; the liquefied gas is converted into a mixed hydrocarbon product of taking aromatic hydrocarbon as a main component under the action of a molecular sieve based catalyst; and the mixed hydrocarbon product enters the dethanizer to separate after being processed by an oil-water separator. By adopting the process, gasoline aromatization and liquefied gas aromatization are combined, and the MTP by-product is effectively converted into the hydrocarbons. By adopting the process, the actual gaining rate of the liquid hydrocarbon by-product of the MTP can be up to 65-120%, and the hydrocarbon yield of liquid aromatization can be up to 32-40%.

A process for reforming a hydrocarbon stream is presented. The process involves splitting a naphtha feedstream to at least two feedstreams and passing each feedstream to separation reformers. The reformers are operated under different conditions to utilize the differences in the reaction properties of the different hydrocarbon components. The process utilizes a common catalyst, and common downstream processes for recovering the desired aromatic compounds generated.

A process for reforming a hydrocarbon stream is presented. The process involves splitting a naphtha feedstream to at least two feedstreams and passing each feedstream to separation reformers. The reformers are operated under different conditions to utilize the differences in the reaction properties of the different hydrocarbon components. The process utilizes a common catalyst, and common downstream processes for recovering the desired aromatic compounds generated.

A process for reforming a hydrocarbon stream is presented. The process involves splitting a naphtha feedstream to at least two feedstreams and passing each feedstream to separation reformers. The reformers are operated under different conditions to utilize the differences in the reaction properties of the different hydrocarbon components. The process utilizes a common catalyst, and common downstream processes for recovering the desired aromatic compounds generated.

The invention relates to a method for preparing aromatics by catalytic conversion of methanol, which mainly solves the problems of low yield of aromatics and serious hydrothermal deactivation of catalysts in the prior art. In the present invention, the methanol raw material enters the fluidized bed reactor and the modified ZSM-5 catalyst is contacted and reacted to obtain the product containing aromatics and the unborn catalyst, and the unborn catalyst after stripping enters the riser regenerator and contacts the regeneration medium I at 500~ Burned under the condition of 600 ℃, the outlet of the riser regenerator is connected with at least one set of closed cyclone separators, and the semi-regenerated catalyst separated by the closed cyclone separators enters the fluidized bed regenerator and contacts regeneration medium II at 630~ The technical scheme of continuing to burn at 700°C to obtain a regenerated catalyst, the regenerated catalyst entering the degassing tank, and the degassed product returning to the fluidized bed regenerator solves this problem well and can be used in the industrial production of aromatics.

This application provides a catalyst for producing paraxylene by co-conversion of methanol and / or dimethyl ether and C4 liquefied gas, and preparation and application thereof. The catalyst is an aromatization molecular sieve catalyst with a shape-selective function co-modified by bimetal and siloxane compound. Methanol and / or dimethyl ether and C4 liquefied gas are fed in reactor together, wherein aromatization reaction occurring on a modified shape-selective molecular sieve catalyst. The yield of aromatics is effectively improved, in which paraxylene is the main product. In products obtained by co-conversion of methanol and / or dimethyl ether and C4 liquefied gas, the yield of aromatics is greater than 70 wt %, and the content of paraxylene in aromatics is greater than 80 wt %, and the selectivity of paraxylene in xylene is greater than 99 wt %.

The invention relates to a light-hydrocarbon aromatized catalyst which comprises the following components according to the mass percent: 20-75 percent of zeolite with MFI structure, 20-75 percent of aluminum phosphate and 0.5-8.0 percent of zinc oxide. The catalyst is used for the light-hydrocarbon aromatization reaction and has better aromatization activity, low carbon deposition rate in the reaction and long one-way service life.

The invention relates to a catalyst for preparing arene from synthesis gas and a use method of the catalyst, and mainly solves the technical problems of long technological process, high production cost and low arene yield which exist during a process of preparing the arene from the synthesis gas in the prior art. According to the use method, under the condition of the temperature of 250-450 DEG C, pressure of 0.01-8.0 MPa and synthesis gas volume space velocity of 400-10000h<-1>, an oxygenated compound is taken as raw material, the raw material is in contact with and is reacted with the catalyst in an reactor, so that a material flow containing the arene is obtained; by utilizing the technical scheme of a Fe-containing composite oxide and a molecular sieve composite catalyst, the above problems are well solved; and the catalyst can be applied to industrial production of preparing the arene from the synthesis gas.