848 results about "Propane" patented technology

The invention relates to the technical field of oilfield chemistry, and discloses a graft modified cellulose filtrate reducer and a preparation method thereof.The preparation method comprises the following steps that modified hydroxyethyl cellulose, 2-acrylamide-2-methyl propane sulfonic acid, dimethyl diallyl ammonium chloride, alkenylated cardanol and N, N '-methylene bisacrylamide are added into deionized water, stirring is conducted, and a mixture is obtained; the preparation method comprises the following steps: adding cellulose into a reaction kettle, stirring for 10-15 minutes at the temperature of 40-60 DEG C at the speed of 300-400 rpm, dropwise adding ammonium persulfate and sodium hydrogen sulfite into a system, and continuously reacting for 4-6 hours to obtain the grafted modified cellulose filtrate reducer. The filtrate reducer disclosed by the invention has good high temperature resistance and salt resistance.

The invention relates to the technical field of catalyst carriers, and discloses reticular porous spherical aluminum oxide as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing an aluminum source, acid, a pore-forming agent, a surfactant and water to obtain pseudo sol; (2) performing ultrasonic treatment and oil ammonia column forming treatment on the pseudo sol obtained in the step (1) to obtain gamma-Al2O3 spherical gel beads; and (3) aging, washing, drying and calcining the gamma-Al2O3 spherical gel beads obtained in the step (2) to obtain the reticular porous spherical alumina. The spherical aluminum oxide prepared by the method has abundant communicated reticular pore channels, is obviously distributed in mesopore and macropore ranges, is beneficial to obviously improving dispersion and loading of a catalyst in an aluminum oxide carrier and improving the performance of petroleum reforming and propane dehydrogenation, and has industrial production utilization value and commercial value.

The invention discloses a gradient frame membrane and separation application thereof. An integrated gradient membrane material is constructed in a mode of functional group sharing, metal node sharing or skeleton interpenetration, and target molecule recognition sites are designed by utilizing the advantage that a framework material is easy to modify, so that the separation performance is remarkably improved. The gradient film structure comprises a metal organic-metal organic framework gradient film, a metal organic-covalent organic framework gradient film and a covalent organic-metal organic framework gradient film. The invention introduces a new structure of a metal organic framework-covalent organic framework gradient film and a construction strategy thereof in detail. The preparation method comprises the steps of preparing a bottom layer film structure from bottom to top, then preparing a top layer film structure on the bottom layer film structure, performing post-modification and the like. By designing a specific asymmetric porous structure and adsorption sites, the membrane shows excellent ethylene / ethane, propylene / propane, ion screening and organic matter dehydration separation performance under the dual action of adsorption selection and shape-selective screening.

The invention belongs to the technical field of catalytic materials and hydrocarbon reforming, and particularly relates to a high-entropy catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a metal salt solution containing lanthanum, chromium, copper, zinc, manganese, nickel, iron and cobalt ions with a chelating agent and a dispersing agent for reaction, carrying out ultrasonic cavitation treatment to obtain sol, adjusting the pH value, gelatinizing under an oil bath heating condition to obtain a colloidal precursor, drying, and calcining in an air atmosphere to obtain a perovskite type high-entropy oxide precursor; and then treating in a reducing atmosphere to obtain the FeZnCuNiCo perovskite type high-entropy alloy catalyst which contains metal components of La, Cr, Ni, Mn, Fe, Zn, Cu and Co and takes a multi-metal alloy active center of Fe-Zn-Cu-Ni-Co as a main component. The high-entropy catalyst can meet the harsh requirements of high temperature, strong carbon deposition driving force and long-period operation in a propane dry reforming reaction, and is suitable for industrial application scenarios of continuous production of high-temperature synthesis gas.

Systems herein separate an inlet gas stream containing methane, C2 components, C3 components and optionally heavier hydrocarbons into a volatile gas fraction containing methane and a less volatile hydrocarbon fraction containing C2+ components. The system may include piping, valving, and controls configured to flexibly allow the system to operate in a high ethane recovery mode, a high throughput mode, or in some embodiments, a high propane recovery mode.

The invention discloses a chromium catalyst for propane dehydrogenation and a preparation method and application thereof, the catalyst is composed of an active component Cr2O3, an auxiliary agent, a modifier and an Al2O3-ZrO2 complex, the modifier is Y or Nd, and the auxiliary agent is at least one of Mn2O7, In2O3, CoO, OsO4 and MoO3. The catalyst is high in catalytic activity, strong in anti-coking capability, good in stability, low in cost and high in economical efficiency.

The invention relates to the technical field of reactors, in particular to a partition annular electric heat tracing radial propane dehydrogenation reactor and a heating method thereof.The partition annular electric heat tracing radial propane dehydrogenation reactor comprises a reactor shell, a reaction cavity is formed in the reactor shell, and a heat preservation layer is arranged in an interlayer in the reactor shell; the radial bed layer structure is arranged in the reaction cavity and comprises an inner cylinder and an outer cylinder which are concentrically arranged, as well as a catalyst bed layer and an electric heat tracing system which are filled between the inner cylinder and the outer cylinder, and the electric heat tracing system comprises a plurality of electric heat tracing assemblies and a power supply module; the temperature control system comprises temperature sensors arranged in the annular heating areas in a distributed mode and a controller. Compared with the prior art, the electric heat tracing assembly is directly buried in the catalyst bed layer, energy is supplied to all the areas through the independent power supply branch circuits, power is independently adjusted through the controller, partition differentiation heat compensation can be implemented according to the difference that heat dissipation of the outer ring is higher and heat absorption of the inner ring is higher, and the radial temperature difference and local temperature fluctuation of the bed layer are remarkably reduced.

A modular utility system integrates clean power generation, thermal management, and security monitoring within a standardized shipping container format. The system comprises a generator set (70 kW-600 kW) configured for operation with multiple fuel sources including natural gas, propane, methane, or hydrogen, coupled to a water-fired absorption chiller utilizing waste heat recovery. A closed-circuit evaporative cooler enhances thermal efficiency without chemical additives. The system incorporates a 360-degree security camera and remote monitoring capabilities for tracking operational parameters. A power distribution panel (460V, 3-phase) supports both building power supply and electric vehicle charging stations. The modular architecture enables scalable deployment through dual-module configurations, with separate power generation and thermal management units. The system provides sustainable, off-grid power generation while maximizing energy efficiency through integrated waste heat utilization and advanced thermal management protocols.

The invention discloses a system and a method for preparing low-carbon olefin through carbon dioxide adsorption and in-situ oxidative dehydrogenation. The invention provides a system and a method for integrating carbon dioxide capture and in-situ oxidation low-carbon alkane (ethane / propane) dehydrogenation, a bifunctional material is composed of an adsorbent and a catalyst, and capture of carbon dioxide and in-situ oxidation low-carbon alkane dehydrogenation can be realized in the same reaction tower, so that the highest one-way carbon dioxide conversion rate can reach 100%, and the conversion rate of carbon dioxide can reach 100%. And meanwhile, the ethylene yield reaches 26%. According to the method, the problems of additional product separation and product gas recycling caused by low carbon dioxide conversion efficiency in the prior art are avoided, and effective heat management is realized, so that the process of integrating carbon dioxide capture and preparing low-carbon olefin by oxidizing low-carbon alkane has more economic advantages.

The invention belongs to the technical field of low-carbon dehydrogenation aids, and particularly relates to a heat balance aid as well as a preparation method and application thereof. The heat balance auxiliary agent comprises Al, Ca, Si, Cu and Mn elements existing in an oxide form; wherein the Al2O3, the CaO and the SiO2 jointly form a skeleton structure of the auxiliary agent, and the CuO and the MnO2 are used as active components and are attached to the skeleton structure; the molar ratio of metal elements in the heat balance auxiliary agent is as follows: Al: Ca: Si: Cu: Mn = (49-78.9): (15-25): (1-10): (5-15): (0.1-1). The heat balance additive prepared by the invention shows excellent anti-sintering capability, long service life and stable heat supply performance under harsh reaction conditions such as propane dehydrogenation, and can effectively improve the selectivity of target olefin and reduce the generation of byproducts such as methane.

The invention belongs to the field of catalyst preparation, and particularly relates to a platinum-based bimetallic propane dehydrogenation catalyst and a preparation method thereof. The method comprises the following steps: firstly, weighing beta molecular sieve powder, adding into a concentrated nitric acid solution, stirring and refluxing at high temperature, centrifugally washing, and drying to obtain a dealuminated beta molecular sieve; then calcining the metal additive oxide powder and the dealuminated beta molecular sieve in a reducing atmosphere to obtain composite beta molecular sieve powder; then weighing platinum precursor salt, dissolving the platinum precursor salt in ultrapure water to form a solution, and then adding ethylenediamine for coordination; and finally, impregnating the composite beta molecular sieve with a platinum precursor solution, and carrying out aging, drying and high-temperature treatment to obtain the dealumination beta molecular sieve loaded platinum-based bimetallic catalyst. According to the method provided by the invention, the metal is spontaneously and highly dispersed on the carrier by utilizing the capturing effect of the beta molecular sieve silanol nest on the metal and combining the dynamic migration behavior of the metal under high-temperature reduction. The prepared catalyst shows extremely high propane conversion activity and selectivity at 600 DEG C, and is excellent in stability.

The application discloses an MFI type molecular sieve confined noble metal Ru-based catalyst and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a silicon source, a template agent and water, stirring to hydrolyze the silicon source, and obtaining a mixed solution; mixing a precursor of Ru and a ligand, then adding the mixture into the mixed solution, and then performing hydrothermal reaction at 160-180 DEG C for 72-96 h to obtain a solid sample; and performing step-by-step calcination on the solid sample in a flowing atmosphere. The MFI type molecular sieve confined Ru-based catalyst realizes effective stabilization of the easily-migrated and agglomerated Ru. The catalyst is applied to a propane oxidation reaction, and compared with a supported catalyst directly impregnated on the surface of the MFI molecular sieve, the catalyst has better low-temperature propane oxidation performance and shows excellent high-temperature thermal stability.

The invention belongs to the technical field of hydraulic oil preparation, and particularly relates to anti-wear hydraulic oil and a production process thereof. The anti-wear hydraulic oil is prepared from the following raw materials in percentage by mass: 2 to 2.2 percent of an anti-wear complexing agent, 0.002 to 0.003 percent of a demulsifying agent, 0.001 to 0.0015 percent of an anti-foaming agent, 0.03 to 0.04 percent of an anti-rust agent, 0.1 to 0.3 percent of a pour point depressant, 0.3 to 0.5 percent of a dispersing agent and the balance of base oil. According to the anti-wear hydraulic oil disclosed by the invention, a mixture of 500N II type base oil, 100N III type base oil, CTL 4 base oil and trimethylolpropane trioleate is used as base oil, and an anti-wear complexing agent, a demulsifier, an anti-foaming agent, an anti-rust agent, a pour point depressant and a dispersing agent are added into the base oil; the prepared anti-wear hydraulic oil is ensured to have excellent extreme pressure property, thermal oxidation stability and wear resistance.

The invention provides a method for continuously preparing 2-bromoheptafluoropropane, which belongs to the field of preparation of fluorine-containing organic intermediates, and is characterized in that heptafluoropropane and bromine are used as reaction raw materials, continuously pass through a reactor filled with a palladium-manganese bimetallic catalyst, and react at the temperature of 200-300 DEG C to prepare the 2-bromoheptafluoropropane. The used raw materials are cheap and easy to obtain, the catalyst preparation process is simple, the reaction temperature is low, the yield is high, and industrial production is easy.

The utility model discloses a heat management integrated module for a refrigerant side, a propane refrigerating system and a vehicle. The module comprises an integrated runner plate on which a compressor, a water-cooled condenser, a liquid storage drying tank, an electronic expansion valve and a battery cooling heat exchanger are integrated. Refrigerant circulates among all the components through a first flow channel, a second flow channel and a third flow channel which are independently arranged in the flow channel plate. By adopting the integrated design, the refrigerant leakage risk is remarkably reduced, the system size is effectively reduced, the space is saved, the heat management performance is improved, and key support is provided for safe application of the propane refrigeration technology.

The invention discloses a method and a device for degrading bisphenol A by using a propane matrix membrane bio-membrane reactor, and belongs to the technical field of microorganism application. The method specifically comprises the following steps: inoculating activated sludge into a membrane bio-membrane reactor with a basic inorganic salt culture medium, and introducing propane to promote the growth of a bio-membrane on hollow fiber membrane filaments in the membrane bio-membrane reactor, so as to obtain the membrane bio-membrane reactor after membrane formation is completed; the method comprises the following steps: introducing bisphenol A-containing wastewater to be treated into a membrane bio-membrane reactor, continuously introducing propane, and inducing microorganisms to express alkane monooxygenase and cytochrome P450 monooxygenase, thereby promoting hydroxylation of bisphenol A and degrading bisphenol A into a downstream product of which the toxicity is lower than that of bisphenol A. The propane is used as a carbon source and an electron donor, the propane can be efficiently utilized to provide a safe and good environment for biodegradation of bisphenol A, and secondary pollution possibly caused by a traditional carbon source is avoided.

The invention discloses a low-defect molecular sieve supported cobalt catalyst for propane dehydrogenation and a preparation method thereof. The cobalt-based molecular sieve catalyst comprises a low-defect molecular sieve (L-Zeoliite) carrier and an active component cobalt loaded on the molecular sieve carrier. The preparation method of the Co / L-Zeoliite catalyst comprises the following steps: repairing defects of the defective molecular sieve carrier, and loading the active component cobalt on the low-defect molecular sieve. According to the method, various commodities or self-made molecular sieves are adopted, the low-defect molecular sieve carrier is synthesized through innovative alkali liquor repairing, monatomic Co or ultra-small CoO clusters can be limited to the low-defect molecular sieve through the method, and the activity of the molecular sieve catalyst is far higher than that of a conventional defect (silicon hydroxyl nest) limited Co molecular sieve catalyst and is higher than that of most noble metal-based catalysts. In addition, the invention further provides a process for synthesizing the catalyst through a one-pot method, the dosage of active metal is greatly reduced, the synthesis process is simplified, the applicability to raw materials and carriers is high, and the application prospect is good.

The application belongs to the technical field of oil and gas field development, and particularly relates to a temperature-resistant and salt-resistant foaming agent for drilling and a synthesis method thereof. The synthesis method is as follows: diphenylamine-4-sodium sulfonate, isopropyl alcohol and 1,3-dibromopropane are added into a four-necked flask, stirred, heated and refluxed to obtain a mixed solution; 90-95wt% of isopropyl alcohol in the mixed solution is distilled off under reduced pressure, distilled water is added, and the whole is transferred into a separatory funnel, fully shaken, separated, and a small amount of oil phase is discarded; the pH is adjusted to 2-3, a precipitate is separated out, suction filtration is performed, and an intermediate is obtained; the intermediate is transferred into a four-necked flask with isopropyl alcohol, sodium bromoethyl sulfonate is added, the pH is adjusted to 7-8, and the product solution is obtained by heating and refluxing; the product is obtained by vacuum distillation, recrystallization and drying. The foaming agent for drilling has the advantages of good temperature resistance, salt resistance and salinity resistance.

Hoses include inner tube, a reinforcement layer disposed outwardly from the inner tube, and a cover layer disposed outwardly from the reinforcement layer, and the cover layer and / or inner tube is based on a cured composition formed from a mixture containing a blend of chlorinated polyethylene (CPE) and cross-linkable oxidized high density polyethylene (oxidized HDPE), where the CPE and oxidized HDPE are blended in a CPE:oxidized HDPE weight ratio of from 10:1 to 1:1, and a peroxide curing system. The peroxide curing system used in some compositions according the disclosure include alpha-alpha-bis(t-butylperoxy)diisopropylbenzene and trimethylolpropane trimethacrylate.

The application discloses an alkylation device with a circulating refrigerant impurity removal function, which comprises an alkali washing assembly, a water washing assembly, a depropanizing tower and a deisobutane tower; the alkali washing assembly and the water washing assembly are connected in series on a circulating refrigerant feeding conveying pipe; a water washing assembly discharge port is in pipeline communication with a depropanizing tower feeding inlet; and a depropanizing tower lower discharge port is in pipeline communication with a deisobutane tower feeding inlet. The device can remove SO2, sulfides such as mercaptans and free water in the circulating refrigerant of the alkylation device, thereby effectively reducing the plugging frequency of the depropanizing tower, improving the propane removal efficiency of the alkylation device system, avoiding the increase of the content of propane in the system, maintaining a better alkylene ratio in the circulating material and improving the quality of the obtained isooctane product.

The invention belongs to the technical field of organic synthesis, and relates to a preparation method of bis (trimethylolpropane), which comprises the following steps: preparing 2, 2-bis (hydroxymethyl) butyraldehyde from trimethylolpropane under the action of an oxidant; then, trimethylolpropane and 2, 2-bis (hydroxymethyl) butyraldehyde are subjected to reductive etherification under the action of a reductive etherifying agent and a catalyst, and the target product bis (trihydroxymethyl) propane is obtained. The preparation method of bis (trihydroxymethyl) propane has the advantages of few reaction steps and mild conditions, can improve the reaction yield, and is beneficial to the realization of industrial application.

The application belongs to the technical field of oil exploitation, and particularly relates to a temporary plugging agent for fracturing acidification and a preparation method thereof. The preparation method is as follows: in a reactor, itaconic acid, p-styrene sulfonic acid, 2-allyloxy methyl-2-hydroxymethyl propane-1,3-diol, vinyl pyridine, pentaerythritol diacrylate, buffer salt and deionized water are sequentially added, stirring is conducted, the pH value is adjusted, and all raw materials are completely dissolved; an initiator is added from a high-position dropping tank, the reaction is automatically heated, the reaction is kept, a reducing agent is added, the reaction is terminated, the pH value is adjusted, and a temporary plugging agent solution is obtained; the temporary plugging agent solution is dried and granulated to obtain the product temporary plugging agent. The preparation method has the characteristics of simple synthesis process and no by-products; the temporary plugging agent has the advantages of large water absorption, large plugging strength, high breakthrough pressure, self-degradation and designable degradation time.

The application discloses a method for analyzing the purity of heptafluoropropane extinguishing agent, which comprises the following steps: (1) configuring heptafluoropropane and impurity standard gas; (2) selecting a chromatographic column type; (3) setting gas chromatograph analysis conditions; and (4) detecting a sample to be measured. Compared with the prior art, the method has the advantages of simple operation, better separation effect and higher accuracy.

The application provides a preparation method of high-stability nanoscale ZSM-5 catalyst and application thereof, and comprises the following steps: (1) preparing full-silicon molecular sieve silicalite-1 by a pre-crystallization method with a template agent, a silicon source and water as raw materials; (2) adopting a seed method, taking the full-silicon molecular sieve silicalite-1 as seed crystals, mixing the seed crystals with reaction raw materials including a template agent, a silicon source, an aluminum source and water, and then treating again by a pre-crystallization method, and then preparing ZSM-5 catalyst by crystallization, ammonia exchange and metal loading in sequence. The preparation method obtains high-stability light alkane aromatization ZSM-5 catalyst with secondary small particles of about 50 nm stacked together. The catalyst can maintain activity for a long time in the process of propane anaerobic aromatization reaction, has low surface carbon, high aromatic hydrocarbon selectivity and high propane conversion rate; and the synthesis method reduces the use of template agents, is green and environment-friendly, and has good application prospect in the field of propane aromatization catalyst preparation.

The utility model discloses a single cabinet type heptafluoropropane gas fire extinguishing device which comprises a cabinet body, a heptafluoropropane gas fire extinguisher and a supporting base, the supporting base is fixedly located on the inner bottom wall of the cabinet body. The heptafluoropropane gas fire extinguisher is located on the top of the supporting base. The supporting base comprises a bottom plate, a left supporting block, a right supporting block and a plurality of spring universal balls, the left supporting block and the right supporting block are fixedly located on the left side and the right side of the bottom wall in the cabinet body respectively, the bottom plate is fixedly located on the tops of the left supporting block and the right supporting block, and the spring universal balls are fixedly located on the front side of the bottom of the bottom plate. The multiple spring universal balls penetrate through the bottom plate to be located on the top of the bottom plate, and the multiple spring universal balls are located in front of the heptafluoropropane gas fire extinguisher. The utility model has the advantages that the assembly is convenient, and the heptafluoropropane gas fire extinguisher is convenient to place.

The application belongs to a supported catalyst, and discloses a synergistic platinum-based propane dehydrogenation cascade catalytic system as well as a preparation method and application thereof, which comprises a first catalytic unit and a second catalytic unit through physical mixing, the first catalytic unit comprises a SiO2 carrier and a Pt-based dehydrogenation active component supported on the surface of the carrier, and the Pt-based dehydrogenation active component is Pt or PtSn; the second catalytic unit comprises an Al2O3 carrier and a functional oxide component supported on the surface of the carrier; and the first catalytic unit and the second catalytic unit are physically mixed through any one of particle mixing and powder mixing. According to the application, the spatial distribution mode of different catalytic units in a reaction system is reasonably designed, the behavior of intermediates and carbon species in a reaction process is effectively controlled while ensuring that the propane dehydrogenation reaction is efficiently carried out, so that the catalyst deactivation is inhibited, and the activity and long-term stability of the propane dehydrogenation reaction are improved.

The invention provides a method for separating chloropropene and chloropropane, which comprises the following steps of: (1) feeding circulating chloropropene into a coarse distillation tower for distillation separation to obtain chloropropene at the tower top, feeding a mixture flow obtained from a tower kettle into an extractive distillation tower from a feeding hole, performing extractive distillation on the mixture flow and an extracting agent, obtaining chloropropane at the tower top of the extractive distillation tower, and obtaining chloropropane at the tower bottom of the extractive distillation tower; obtaining a mixture flow of chloropropene and the extracting agent from the tower kettle; and (2) sending a mixture flow of chloropropene and the extraction agent obtained from the tower kettle of the extractive distillation tower to an extraction agent recovery tower for recovery, obtaining chloropropene from the tower top and obtaining the extraction agent from the tower kettle, and recycling the extraction agent to the extractive distillation tower. The circulating chloropropene is subjected to coarse rectification, extractive rectification and extraction agent recovery, so that the content of inert components in the circulating chloropropene is reduced, and the subsequent reaction efficiency is improved.

The invention belongs to the field of catalysts, and particularly relates to a self-pillared all-silicon molecular sieve supported catalyst as well as a preparation method and application thereof. The catalyst mainly comprises a nanoscale Silicalite-2 molecular sieve rich in silicon hydroxyl defect sites, an active metal component and an auxiliary agent metal component, wherein the carrier presents a self-pillared morphology formed by splicing and assembling rod-like microcrystals with the particle size of 10-40 nm, after the active metal is loaded by rich silicon hydroxyl defect sites on the surface of the carrier, the interaction between the metal and the carrier can be remarkably enhanced, and the obtained highly-dispersed active metal nanoparticles with the particle size of 1-5 nm are obtained. When the catalyst is applied to propane dehydrogenation reaction, the catalyst shows excellent catalytic activity, the propane conversion rate is 41% or above, the propylene selectivity is up to 97% or above, and good stability provides a new technical approach for developing a propane dehydrogenation fixed bed process which is low in operation cost, low in energy consumption and free of frequent regeneration.

The application relates to a catalyst for catalytically synthesizing propylene acid from propane and application thereof, and the catalyst is represented by the following general formula: Mo a V b Te c Nb d Ni e O x Wherein, a, b, c, d and e respectively represent the atom numbers of Mo, V, Te, Nb and Ni, and the molar ratio of a:b:c:d:e is 7.0-9.0:1.7-2.5:1.0-1.5:1.7-2.3:0.1-1.0, and the value of x is determined by the oxidation state of each element; Ni is introduced by nickel molybdate, Mo is introduced by a molybdate and the nickel molybdate, and the nickel molybdate is prepared by co-precipitation of a molybdate and a nickel salt in the presence of an organic acid. According to the application, the content of different valence metals on the surface of the catalyst can be adjusted by introducing nickel into the catalyst through nickel molybdate, so that the content of high-valence elements Mo 6+ , V 5+ and Ni 2+ in the catalyst and the oxygen vacancy are increased, and the redox capacity of the catalyst is enhanced.

The disclosure relates to systems and methods for hydrogen production from an underground formation by providing heat to a first set of fractures to convert a hydrocarbon (e.g., methane, ethane, propane) present in the underground formation into hydrogen and producing the hydrogen from a second set of fractures.