1242results about "Hydrocarbon from oxygen organic compounds" patented technology

A process for converting an ethanol feed stream to ethylene, comprising passing a portion of said ethanol feed stream to two reactors in parallel and then passing the combined product to a third reactor operated at a higher temperature to prevent the formation of ethers such as diethyl ether.

Methods for upgrading heavy aromatic waste streams, such as polystyrene, to chemical feedstocks are disclosed. The process involves feeding waste streams to a first pyrolysis zone followed by hydrogenation. The hydrogenation effluent is processed to recover ethylene, propylene, benzene, ethylbenzene, or their precursors. Optionally, the effluents are separated into light and heavy streams. The light stream from the first pyrolysis effluent is sent to hydrogenation, while the heavy stream is either removed, recycled to the first pyrolysis zone, or fed to a second pyrolysis zone. The light stream from the hydrogenation effluent is processed to recover the same chemicals, and the heavy stream is similarly managed. If present, the second pyrolysis effluent is separated into light and heavy streams, with the light stream processed to recover chemicals and the heavy stream managed as before.

The invention discloses a preparation method of a mesoporous Zn-ZSM-5 molecular sieve for preparing aromatic hydrocarbon from methanol, and belongs to the technical field of synthesis of inorganic materials. Aiming at the problems that a conventional mesoporous Zn / ZSM-5 molecular sieve catalyst Zn blocks orifices, the mesoporous structure is disordered, the molecular sieve solid yield is low, a molecular sieve framework is seriously damaged and the like, the preparation method comprises the following steps: uniformly mixing zinc gluconate with an aluminum source, a silicon source and a template agent, putting the mixture into a closed reaction container, carrying out hydrothermal crystallization, and sequentially washing, drying and roasting to obtain the mesoporous Zn / ZSM-5 molecular sieve catalyst. The sodium type molecular sieve is obtained; the preparation method comprises the following steps: carrying out multiple ion exchange on a sodium type molecular sieve by using an ammonium chloride solution, and sequentially carrying out suction filtration, washing, drying and roasting to obtain the mesoporous Zn-ZSM-5 molecular sieve. According to the preparation method of the methanol-to-aromatic hydrocarbon Zn / ZSM-5 molecular sieve provided by the invention, the obtained molecular sieve is used in the methanol-to-aromatic hydrocarbon process, and has the characteristics of high carbon deposition resistance, high aromatic hydrocarbon selectivity, low Zn wastage rate and the like.

The invention provides a BVPE preparation method based on solid acid catalysis and continuous flow reaction, and relates to the technical field of disubstituted ethane preparation, and the method comprises the following steps: mixing a compound 1, a polymerization inhibitor, a solid acid catalyst and a solvent to form a reaction liquid; enabling the reaction liquid to pass through a fixed bed continuous flow reactor, and reacting at 20-180 DEG C for 1-45 minutes to obtain a compound 2; post-treating, separating and purifying a product; wherein the solid acid catalyst is an HZSM-5 type molecular sieve or acidic resin, the product purity and yield are high, the HZSM-5 type molecular sieve or acidic resin is adopted as the solid acid catalyst, residual pollution of traditional protonic acid (such as p-toluenesulfonic acid) is avoided, in embodiments 1-3, the product GC purity reaches 98.6%-99.1%, the yield reaches 88.8%-93.8%, and the product GC purity and the yield are remarkably higher than those of a contrast (the purity is 96.1%, and the yield is 74.2%).

[Problem] The present invention addresses the problem of inexpensively obtaining a water-absorbing resin which achieves performance that is at least equivalent to that of conventional water-absorbing resins derived from fossil raw materials and in which the amount of impurities is equivalent to, or lower than, that in conventional water-absorbing resins derived from fossil raw materials despite being produced using bio-raw materials able to be recycled in the production of the water-absorbing resin. [Solution] Provided is a method for producing a water-absorbing resin derived from bio-raw materials, the method having steps (i) to (vii) below. A step (i) for obtaining acetone from bioethanol; a step (ii) for obtaining isopropanol from the acetone; a step (iii) for obtaining propylene from the isopropanol; a step (iv) for obtaining acrylic acid from the propylene; a step (v) for polymerizing an aqueous monomer solution containing the acrylic acid to obtain poly(acrylic acid) and / or a salt thereof; a step (vi) for drying the poly(acrylic acid) and / or salt thereof; and a step (vii) for surface crosslinking the poly(acrylic acid) and / or salt thereof.

A process for dehydrating ethanol to produce ethylene is provided. The ethanol is dehydrated to produce ethylene, which is subsequently converted to longer-chain olefins, which are then hydrogenated to produce long-chain paraffins. In some embodiments, a split feed is used to improve efficiency, eliminating the caustic wash column. Advantages of the process include lower steam requirements and a 30-40% reduction in combined reactor volume when using two reactors compared to a single reactor.

The invention relates to a preparation method of a niobium pentoxide loaded molybdenum disulfide catalyst and application of the niobium pentoxide loaded molybdenum disulfide catalyst in lignin conversion. The preparation method comprises the following steps: dissolving ammonium molybdate heptahydrate and thiourea in distilled water, adding Nb2O5, and adjusting the pH value of the mixture to 0.8-1.1 by using hydrochloric acid; transferring the solution into a stainless steel autoclave for hydrothermal reaction; centrifugally separating to obtain a black precipitate, washing with water and absolute ethyl alcohol, and drying in vacuum overnight; and placing the obtained substance in a high-temperature and high-pressure reaction kettle, screwing the reaction kettle to seal the reaction kettle, discharging gas after introducing H2, discharging air in the device, pressurizing to 3-5 MPa, and reacting to obtain the catalyst Nb2O5-MoS2. The catalyst shows excellent activity of aromatic phenol and ether compound hydrodeoxygenation for aromatic hydrocarbon preparation. The invention provides the catalyst which is low in cost, simple and convenient to prepare and excellent in performance, after ten cycle experiments, the activity of the catalyst is still stable, and the indexes of the conversion rate and the yield are reduced by less than 5%.

The invention discloses a method for preparing methane by reforming small molecular alcohol through high-energy electron beam irradiation, and belongs to the technical field of environmental catalysis. According to the method, methane is prepared by reforming small molecular alcohol through high-energy electron beam irradiation. Compared with a traditional biological method, high-energy electron beam irradiation is adopted, substances are irradiated by electron rays accelerated in a high-voltage electric field, molecules of various substances are ionized and excited through interaction of high-energy electrons and the substances, and therefore chemical reactions are initiated. The method disclosed by the invention has a better irradiation methane preparation effect, and the problems of long reaction period (15-30 days), high energy consumption of a preparation process, large carbon emission and the like in the prior art are solved.

The invention belongs to the technical field of perfume preparation processes, and particularly relates to a preparation process of fragrance lasting type perfume ligustral, which comprises the following steps: a catalytic dehydration step: mixing isohexylene glycol and a composite catalyst according to a mass ratio of 100: (0.8-1.2), and carrying out a catalytic dehydration reaction under a gradient heating condition to generate a methyl pentadiene mixture; a Diels-Alder addition step: carrying out an addition reaction on acrolein and a methyl pentadiene mixture according to a mass ratio of 1: (1.05-1.15) under a sectional temperature control condition, controlling the reaction pressure to be 0.25-0.35 MPa, carrying out a heat preservation reaction for 2 hours, and cooling to obtain a ligustral crude product; and a three-tower series rectification step: separating and purifying the ligustral crude product after the addition reaction through a light component removal tower, a middle component removal tower and a refining tower in sequence to obtain a ligustral finished product. By optimizing a catalytic system, reaction conditions and a separation process, the purity and aroma durability of the product are improved.

The invention discloses a synthesis method of an indaziflam intermediate 2, 6-dimethyl-indene amine. In the invention, indanone is reduced by using a cheap reducing reagent to prepare indanol, the indanol and sulfonyl chloride are subjected to an elimination reaction to prepare indene, and finally, the indene and an amination reagent are subjected to addition to prepare the 2, 6-dimethyl-indene amine. The route is good in reaction selectivity and few in side reaction, and the total yield of the 2, 6-dimethyl-indene amine can reach 70% or above. The method is mild in reaction condition, easy to control, less in three wastes, simple in whole process operation and easy to industrialize.

The present application provides a kind of for the preparation of C 3+ The application discloses a catalyst for olefin, a preparation method and application, the catalyst is supported by a molecular sieve, and the molecular sieve is MFI molecular sieve or SBA-16 molecular sieve, and the catalyst is loaded with multi-metal, and the multi-metal includes metal tungsten, transition metal and alkali metal. The catalyst is used for providing Lewis acid sites by introducing metal tungsten into MFI molecular sieve or SBA-16 molecular sieve by one-step process, and further selectively introducing transition metal and alkali metal. By selectively coupling hydrogenation-dehydrogenation sites, C-C coupling sites and alkali metal sites in the same multifunctional catalyst, the synergies between the molecular sieve carrier and the multi-metal are realized. The catalyst realizes high-efficiency ethanol-to-C 3+ Olefins conversion in ethanol, with acetaldehyde as the reaction intermediate, and has the advantages of high C 5+ Olefins selectivity.

The invention relates to the technical field of performance evaluation, in particular to an MTO device operation performance evaluation method and system, and the method comprises the following steps: calling a sensor to collect particle density and flow data, recognizing structure abnormity through combination of pressure drop, obtaining a flow deviation rate, collecting energy consumption and yield to form an energy consumption response value, and calculating a hot pressure drift value through combination of temperature and pressure data; and analyzing the relationship between the pressure difference and the wind speed to obtain a feeding offset, summarizing offset parameters to evaluate the efficiency stability, and obtaining an operation efficiency analysis result. According to the method, early judgment of structural abnormity is achieved through combined recognition of the particle density and the flow change trend, response indexes are constructed through the energy consumption and yield difference value, the dynamic property of energy efficiency evaluation is enhanced, temperature and pressure migration path analysis is combined, the identification capacity of working condition fluctuation is improved, control signals and pressure difference response comparison are adopted, and the energy efficiency evaluation accuracy is improved. The matching performance of feeding regulation and control is optimized, multi-dimensional abnormal data are collected and evaluated, and the space stability quantification of the operation state is realized.

The invention provides hydrocarbon synthesis equipment and a hydrocarbon synthesis process. The hydrocarbon synthesis equipment comprises an alcohol synthesis unit and an alcohol-to-hydrocarbon section, the apparatus and process incorporate a reforming system for treating C1-C4 paraffins and / or olefins enriched by-product streams produced in the apparatus and process to provide a reformer-based syngas stream that is sent to the inlet of an alcohol synthesis unit.

Disclosed are a fluidized bed separation method and device for methanol-to-olefins quenched water. The method may subject quenched water to liquid-solid separation via a micro-cyclone separator. The method may also subject clear liquid from the micro-cyclone separator to a secondary separation via a fluidized bed separator, then sending the same to an olefin separation device, then recovering some waste heat of the quenched water, and then returning the same to a quenching tower after performing heat exchange. The method may also regenerate a separation medium by reversely feeding stripping tower purified water or quenched water, so as to release catalyst particles absorbed by the separation medium. The method may also send a catalyst slurry concentrated by the micro-cyclone separator and the fluidized bed separator to a filter-press unit for filter-press dehydration, so as to recover a catalyst.

The invention belongs to the technical field of degradation and recovery of high polymer materials, and discloses a subcritical hydrothermal catalytic degradation and recovery method of acid anhydride / glycidyl ether epoxy resin, which comprises the following steps: placing an anhydride / glycidyl ether epoxy resin sample and a nitric acid solution in a hydrothermal reaction kettle; raising the temperature through a program temperature control device and maintaining a constant-temperature reaction. The degradation rate of 80.6%-100% of the epoxy resin can be achieved through the hydrothermal degradation reaction. Compared with a traditional thermal cracking and supercritical fluid degradation process, the method has the advantages that an acidic degradation system without organic solvent addition and transition metal catalysis is innovatively constructed, and efficient degradation of an epoxy resin network structure is realized under the subcritical hydrothermal condition. The process has the characteristics of mild reaction conditions, relatively low energy consumption, environmental friendliness and the like, and provides a feasible chemical technical path for resourceful treatment of the anhydride cured glycidyl ether type epoxy resin waste.

The invention provides a preparation method, a product and application of an acid site / carrier decoupled metal-acid multifunctional catalyst, and belongs to the technical field of biomass energy utilization. According to the preparation method, a metal active site is provided by non-noble metal Ni, a neutral material h-BN is taken as a carrier, and a Ni element is reduced and loaded on h-BN under an alkaline condition by adopting a liquid phase reduction method, so that the Ni / h-BN catalyst is prepared; and then heteropoly acid is used for providing an acid site, the acid site is loaded on a Ni / h-BN catalyst through an impregnation method, and Ni-HSiW / h-BN is prepared. According to the present invention, by flexibly regulating and controlling the acid site (loaded or unloaded heteropolyacid), the required product can be selectively obtained when the obtained catalyst is used for catalyzing the lignin derivative hydrodeoxygenation reaction, and by regulating and controlling the temperature, the time and other parameters of the hydrodeoxygenation reaction, the high selectivity on the reaction product can be provided.

The invention belongs to the technical field of aviation fuel, and provides a method for producing sustainable aviation fuel by utilizing straws, which comprises the following steps: firstly, preparing synthesis gas from the straws; then carrying out a catalytic reaction on the synthesis gas and dimethyl ether through a primary molecular sieve catalyst, carrying out a catalytic reaction on the obtained catalytic product through a secondary metal catalyst, and separating to obtain ethanol; then preparing ethylene from the ethanol; and finally, preparing the aviation fuel from ethylene. The preparation method of the primary molecular sieve catalyst comprises the following steps: mixing a phosphoric acid solution with deionized water, adding a template agent according to a molar ratio of phosphoric acid to the template agent of 1: (0.5-0.55), and adding an aluminum source, a cerium source and silica sol while stirring to obtain gel; heating and crystallizing the gel; centrifugally washing the product to be neutral, drying and roasting; immersing the roasted product into a zinc nitrate solution, drying and calcining to obtain a zinc-loaded product; and performing dealumination treatment on the zinc-loaded product by using a citric acid solution, and roasting to obtain the zinc-loaded catalyst. According to the method, the ethanol yield in the aviation fuel production process can be remarkably improved.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a method for synthesizing a fly ash-based hierarchical porous ZnY / Si-Beta catalyst by adopting a solvent-free method and application of the fly ash-based hierarchical porous ZnY / Si-Beta catalyst. According to the invention, fly ash is taken as a raw material, the ZnY / Si-Beta catalyst is synthesized by adopting a solvent-free method to catalyze direct conversion of an ethanol aqueous solution to prepare butadiene, so that resource utilization of fly ash can be realized, the influence of water on the active center of the catalyst can be inhibited, and efficient conversion of the ethanol aqueous solution to prepare butadiene is realized.

The invention relates to the technical field of zeolite molecular sieve production, in particular to a method for synthesizing a zeolite molecular sieve through solid waste coal gangue in-situ crystallization. The method comprises the following steps: roasting coal gangue at 600-800 DEG C for 1-5 hours to obtain roasted coal gangue; mixing the coal gangue with acid and water in a ratio of 1: (0.1-0.5): (4-8), reacting at 65-95 DEG C for 1-5 hours, dropping alkali to adjust the pH value to 7-10, aging, filtering, washing and drying to obtain activated coal gangue; mixing the activated coal gangue with an external source, a template agent, a solid-phase seed crystal (the crystallinity is greater than or equal to 85%) and water in proportion, crystallizing for 24-72 hours at the temperature of 100-200 DEG C, roasting to obtain SAPO-34, SSZ-13 or AlPO4-5, and adding ammonium salt for ion exchange to prepare an MTO catalyst. The crystallization degree of the molecular sieve is improved, the methanol conversion rate of the MTO catalyst is larger than or equal to 96%, coal gangue recycling is achieved, cost is reduced, and the technology is universal and suitable for industrialization.

The present invention provides a hydrogenation dehydration catalyst and a preparation method thereof, the hydrogenation dehydration catalyst is used for preparing C16 and C18 n-alkanes from animal and plant oil, the hydrogenation dehydration catalyst comprises a carrier and active components, the carrier comprises magnesium aluminate spinel, the active components comprise molybdenum and nickel, and the molar ratio of molybdenum to nickel is 85-100: 1. According to the present invention, the magnesium aluminate spinel is adopted as the carrier, the molybdenum and the nickel are adopted as the active components, and the molar ratio of the molybdenum to the nickel is controlled in the range of 85-100: 1, such that the conversion rate is high and the C18 n-alkane selectivity is high when the catalyst is used for preparing the n-alkane from the animal and plant oil.

The invention relates to a nickel-ruthenium-based solid superacid hydrogenation catalyst and a preparation method and application thereof, the method comprises the following steps: (NH4) 2S2O8 is dissolved in methanol, ZrO2 is added, stirring and ultrasonic treatment are continued, stirring and filtering are carried out, precipitate is dried overnight, solids are ground into powder after being cooled, and the powder is roasted at 550 DEG C for 3 h to obtain S2O8 < 2-> / ZrO2; the preparation method comprises the following steps: dissolving nickel salt and ruthenium salt in deionized water, performing ultrasonic treatment, adding S2O82- / ZrO2, continuing ultrasonic treatment, adding a NaBH4 solution for reduction, and changing the solution from light green to dark black; and filtering the mixture, drying in vacuum, and grinding to obtain the hydrogenation catalyst. According to the invention, a second metal Ru is introduced to modify a monometal Ni-based solid superacid catalyst 10% Ni-S2O8 < 2-> / ZrO2, and the bimetallic Ni-Ru catalyst is prepared. The catalyst has higher catalytic activity when applied to catalytic hydrogenation of coal model compounds.

A liquid-crystal (LC) material comprising one or more compounds of the formula Ihaving negative dielectric anisotropy and the use thereof for optical, electro-optical and electronic purposes, such as for example in LC displays, in particular energy saving displays based on the ECB, IPS or FFS effect.

Processes and apparatuses for separating carbon monoxide from ethylene. The ethylene may be produced from biobased alcohol. The separation utilizes a fractionation column which produces a carbon monoxide depleted ethylene stream and an overhead stream comprising carbon monoxide and ethylene. The ethylene from the overhead stream may be recovered in an absorption zone with an absorbing liquid. A oxygenate fractionation zone may be utilized to remove oxygenates from the carbon monoxide depleted ethylene stream.

The invention discloses an N-doped biochar loaded Ni / NiO catalyst and a preparation method and application thereof.The preparation method comprises the following steps that firstly, apple branches are washed with deionized water, dried, smashed and screened, and branch powder uniform in size is obtained; 2, uniformly mixing the branch powder with potassium formate and urea, drying, and carrying out a calcination reaction at 600-800 DEG C; step 3, cooling the product obtained in the step 3 to room temperature, washing until the pH is neutral, and drying to obtain black powder; 4, uniformly stirring the black powder and inorganic salt, and performing vacuum drying; and 5, carrying out pyrolysis reduction on the product obtained in the step 4. The preparation raw materials are agricultural and forestry waste apple branches, the source is wide, the cost is low, the viewpoint of waste reutilization is fully played, and the additional value is greatly improved; the temperature required by in-situ hydropyrolysis is mild, external hydrogen is not needed, the operation is convenient, and the reaction cost and potential safety hazards are reduced.

The invention provides a preparation method of a supported catalyst, the supported catalyst and application. The preparation method comprises the following steps: precipitating a noble metal Ru precursor and a non-noble metal (Fe, Mn, Cr, Mo and W) precursor on a carrier by adopting a coprecipitation method, and reducing a non-noble metal oxide from a high-valence part to a low-valence part by controlling the ratio and the reduction temperature of the noble metal Ru and the non-noble metal to form high-valence and low-valence coexisting non-noble metal nanoparticles, and the noble metal Ru is in a monatomic dispersed state. Therefore, the preparation method of the supported catalyst provided by the invention has the advantages of simple steps, low cost and no need of complex operation, and is convenient for realizing industrial production. Tests show that when the supported catalyst is applied to hydrogenation reaction of unsaturated aldehyde ketone, hydrogenation reaction of acid and ester, reductive amination reaction of aldehyde and ketone and reductive amination reaction of octanol and hexanediol, the activity and selectivity can be remarkably improved.

To provide an economically advantageous method for producing a high calorific value fuel gas, capable of obtaining the high calorific value fuel gas with a high methane concentration that can be used as a raw material for a city gas without using costly carbon dioxide separation equipment when obtaining a methane main component gas with the high calorific value that can be used as the city gas by a methanation reaction of ethanol.SOLUTION: A method for producing a high calorific value fuel gas comprises: a step of adjusting a raw material gas by adding hydrogen and water vapor to ethanol such that a hydrogen / ethanol molar ratio is 2.0 or more to 2.5 or less and a water vapor / ethanol molar ratio is 1.2 or more to 4 or less; a steam reforming step of bringing the raw material gas into contact with a catalyst containing ruthenium or nickel at 300°C or higher to 700°C or lower; and a methanation step of bringing a gas obtained in the steam reforming step into contact with the catalyst containing ruthenium or nickel under conditions where a catalyst outlet temperature is 230°C or higher to 330°C or lower.SELECTED DRAWING: Figure 1

The present invention relates to the technical field of alcohol dehydration, and specifically to a catalyst for producing alpha-olefins by dehydrating alcohol, a preparation method thereof, and a method for producing alpha-olefins by dehydrating alcohol. The catalyst comprises: 84-99.88 wt% of a main component, 0.04-6 wt% of a Group IIA oxide, 0.05-8 wt% of a Group IIIB oxide, and 0.03-10 wt% of a transition metal oxide; wherein the main component is selected from at least one of Group IVB oxides; and the transition metal oxide is selected from at least one of Group VIB oxides, Group VIII oxides, Group IB oxides, and Group IIB oxides. The present invention rationally modifies the catalyst by introducing Group IIA metal elements, Group IIIB metal elements, and Group VIB, VIII, IB, and IIB metal elements into the main component, thereby suppressing carbon deposition of the catalyst in the alcohol dehydration reaction, improving the catalytic performance of the catalyst, and promoting the efficient conduct of the alcohol dehydration reaction to produce alpha-olefins.

A method of manufacturing sugar cane polyvinyl alcohol wherein sugar cane bagasse is processed into polyvinyl alcohol. Processing raw materials including sugar cane bagasse and deionized water. Enzymatically hydrolyzing and using saccharification on the sugar cane bagasse to obtain sugar cane bagasse enzymatic hydrolysate. Fermenting the sugar cane bagasse solution. Distilling the fermented sugar cane bagasse solution to obtain ethanol solution and lignin solution. Transferring the distilled solutions to an ethylene plant area to obtain a polymer grade ethylene product. Transferring the polymer grade ethylene product to an acetic acid evaporator to generate vinyl acetate. Introducing the vinyl acetate into an autoclave with methanol solution wherein said solutions undergo a reflux reaction process. Ethyl acetate is then dissolved in methanol to prepare a polyvinyl acetate solution which undergoes alcoholysis wherein the product is then washed and deionized, yielding polyvinyl alcohol.

The invention relates to a device and a method for preparing isobutene and methanol by cracking methyl tert-butyl ether. The device comprises a methyl tert-butyl ether vaporization refining tower, a reactor, a cooling tower, an absorption tower, a methanol extraction tower, an isobutene light component removal tower and an isobutene heavy component removal tower which are sequentially connected along a material conveying direction, a top discharge hole of the cooling tower is connected with a lower gas-phase material inlet of the absorption tower; an absorbent outlet at the bottom of the absorption tower is circularly connected with a cooling absorption liquid inlet at the top of the cooling tower; the bottom extract liquor outlet of the methanol extraction tower is circularly connected with the top absorbent inlet of the absorption tower; an isobutylene discharge hole is formed in the top of the isobutylene heavy component removal tower; the device further comprises a methanol recovery tower and a methanol refining tower which are connected in sequence along the material conveying direction; a bottom cooling absorption liquid outlet of the cooling tower is connected with the methanol recovery tower; a methanol discharge hole is formed in the bottom of the methanol refining tower. The device provided by the invention not only can relax the limitation of the purity of methyl tert-butyl ether in raw materials, but also can prepare high-purity isobutene and high-purity methanol at the same time.

Disclosed is the use of a dividing-wall column in a process for co-producing propylene oxide and styrene monomer. Feed streams to a dividing-wall column comprise a bottoms product produced in recovering crude propylene oxide from an epoxidation reaction product, a hydrogenated byproduct styrene monomer production, and a light fraction of a bottoms product withdrawn from the dividing-wall column. Products from the dividing-wall column comprise an overhead product comprising ethylbenzene for recycle to an oxidation zone, an intermediate product comprising methylbenzyl alcohol and acetophenone as feed to a dehydration zone to produce styrene monomer, and a bottoms product comprising methylbenzyl alcohol and heavy materials.