94 results about "Isobutane" patented technology

A process for separating 1-butene from a C4 raffinate gas composition includes introducing the C4 raffinate gas composition to a reactor containing an adsorbent material and passing the C4 raffinate gas composition through the adsorbent material; adsorbing the 1-butene from the C4 raffinate gas composition onto the adsorbent material to separate the 1-butene from the C4 raffinate gas composition and form a residue gas composition; and desorbing the 1-butene by heating the adsorbent material after the adsorbing to form the 1-butene and regenerate the adsorbent material. The adsorbent material is at least one of a zeolite adsorbent and an alkali-modified zeolite adsorbent having at least 99% by weight selective towards 1-butene for adsorption in comparison to iso-butene and iso-butane.

The present invention provides a blowing agent for producing extruded polystyrene foam having low lambda over time and low foam density. [Solution] The foaming agent comprises (a) a first co-foaming agent consisting of (a) about 50% to about 70% by weight of HFO and / or HFCO having three or four carbon atoms, (b) about 2% to about 15% by weight of methyl formate, (c) a second co-foaming agent consisting of about 20% to about 30% by weight of dimethyl ether, isobutane and combinations thereof, and (d) a third co-foaming agent consisting of about 2% to about 25% by weight of carbon dioxide, acetone and combinations thereof.

Systems and methods for processing a C3 and C4 hydrocarbon mixture have been disclosed. The C3 and C4 hydrocarbon mixture is first processed in an isomerization unit to isomerize n-butane to form isobutane. The resulting effluent stream from the isomerization unit comprising primarily isobutane and C3 hydrocarbons, collectively, is flowed into a separation unit configured to separate the effluent stream to form a C3 stream comprising C1 to C3 hydrocarbons and a C4 stream comprising primarily isobutane. The isobutane in the C4 stream is further dehydrogenated to form isobutene, which is further flowed into an MTBE synthesis unit as a feedstock for producing MTBE.

This invention discloses a method for the efficient conversion of isoparaffins, comprising the following steps: contacting a raw material containing isoparaffins and hydrogen with a catalyst in a reactor, reacting to obtain a product containing small molecule alkanes; wherein the isoparaffins are selected from at least one of isobutane, isopentane, neopentane, isohexane, and 3-methylpentane; wherein the small molecule alkanes are selected from at least one of ethane, propane, and n-butane; the catalyst is obtained by the following steps: mixing a metal acidic functional component, a metal basic functional component, a matrix precursor, a phosphorus auxiliary component precursor, a molding aid, and water, kneading, molding, and vacuum drying to obtain the catalyst.

The application discloses a method for producing ethylene raw material. The method comprises the following steps: mixing hydrocracking light naphtha and hydrogen into a first hydroconversion reaction zone to react, and then the reaction effluent enters a separation system to obtain hydrogen-rich gas and a first hydroconversion product; the first hydroconversion product is separated to obtain ethane, propane, isobutane, isopentane and n-pentane; the isobutane is mixed with hydrogen into a second hydroconversion reaction zone, and the reaction effluent is separated to obtain n-butane; the second hydroconversion reaction zone is filled with a hydroconversion catalyst containing ZSM-35 molecular sieve; and the isopentane is recycled to the inlet of the first hydroconversion reaction zone. The first hydroconversion reaction zone is filled with a hydroconversion catalyst containing mordenite, and at least two catalyst beds are filled; and the active metal content of the hydroconversion catalyst decreases in turn along the flow direction. The method can effectively improve the proportion of normal alkanes in the product and improve the quality of the ethylene raw material.

Ethylene, alpha olefins, and other olefinically unsaturated monomers may be polymerized under fluidized bed polymerization reaction conditions in the presence of a Ziegler-Natta catalyst. A recycle stream featuring an induced condensing agent (ICA) comprising isobutane may increase catalyst productivity while maintaining quality of the polymer product, particularly when the recycle stream is delivered to a reactor containing the fluidized bed under conditions suitable to form a condensed or super-condensed mode in the recycle stream. The recycle stream may comprise unreacted olefinic monomers, and isobutane or a mixture of isobutane and isopentane.

This invention relates to the field of chemical equipment technology, and more particularly to a propane-isobutane mixed dehydrogenation device and its usage method. The propane-isobutane mixed dehydrogenation device includes a tank body, within which are coaxial inner and outer ring plates that allow the passage of reactant gases; a disc that seals the top openings of the inner and outer ring plates; an annular lifting disc that slides against the inner and outer ring plates; and a drive mechanism for raising and lowering the lifting disc. The inner and outer ring plates, the disc, and the lifting disc together form a catalyst chamber. A catalyst inlet is located on the disc. An electric valve and a sealed discharge pipe penetrating the bottom of the tank are located at the bottom of the lifting disc. An inlet pipe, sealed and connected to the inner ring plate, is located at the bottom of the tank. An outlet pipe is located above the side wall of the tank. The propane-isobutane mixed dehydrogenation device provided by this invention has low production and manufacturing costs, is less prone to catalyst particle damage during catalyst bed filling, and exhibits high catalyst bed filling uniformity.

The invention provides a method and a system for producing aromatic hydrocarbon and olefin from diesel oil and application of the method and the system. According to the technical scheme, the method comprises the following steps: carrying out hydrocracking reaction on diesel oil to obtain a high-boiling-range light aromatic hydrocarbon material flow and a low-boiling-range light alkane material flow, wherein the n-butane content in the low-boiling-range light alkane is greater than the isobutane content; the high-boiling-range light aromatic hydrocarbon material flow is fed into an aromatic hydrocarbon combination device, after separation, benzene and toluene-containing fractions enter an extraction unit, C8 aromatic hydrocarbon is extracted as a product, toluene, C9 aromatic hydrocarbon and fractions obtained through separation enter a toluene disproportionation and transalkylation unit, and benzene and C8 aromatic hydrocarbon are produced to the maximum extent; the light alkane material flow is fed into an olefin device, so that olefin such as ethylene and propylene can be produced to the maximum extent. According to the technical scheme, the purpose of efficiently producing aromatic hydrocarbon and olefin from diesel oil is achieved, the diesel oil conversion efficiency is high, the aromatic hydrocarbon conversion selectivity is high, and the olefin yield is high.

The utility model discloses a pressure detection device for an isobutane / n-butane raw material storage tank. The pressure detection device comprises a pressure detection unit, a signal processing module, a central control module, a display module, an alarm module and a protection module. The pressure detection unit adopts a main / standby piezoresistive pressure sensor and is installed at the top of the storage tank through a sealing joint, and an independent shielding signal line is sleeved with a metal corrugated pipe to prevent electromagnetic interference and mechanical damage. The signal processing module integrates signal amplification, filtering and analog-to-digital conversion functions and transmits processed data to the central control module. A microcontroller is arranged in the central control module, a pressure threshold value is preset, the main sensor and the standby sensor can be automatically switched, and encrypted data can be stored. The display module displays a pressure value and a curve in real time, and the alarm module realizes multi-level early warning through sound-light alarm and short message notification. Through double-sensor redundancy design, signal anti-interference processing, intelligent fault switching and multiple alarm mechanisms, the precision, stability and safety of pressure detection are remarkably improved.

A working medium for a heat cycle includes trifluoroethylene, a low boiling point compound having a lower boiling point than the boiling point of the trifluoroethylene, and high boiling point compounds having higher boiling points than the boiling point of the trifluoroethylene. In the working medium, the low boiling point compound is at least one selected from the group consisting of carbon dioxide, R116, and R41, and the high boiling point compounds are at least two selected from the group consisting of HFC-32, HFO-1234yf, HFO-1234ze (E), HFO-1243zf, PFC-14, HFC-134, HFC-143a, HFC-227ea, cyclopropane, isobutene, isobutane, dimethyl ether, and ammonia. An application of the working medium is provided.

The invention discloses a drying control method of a clothes dryer and the clothes dryer, and belongs to the technical field of clothes dryers. The drying control method of the clothes dryer comprises the steps that the temperature of air in a clothes drying cylinder of the clothes dryer is monitored, and the humidity of air obtained after condensation and dehumidification in the internal circulation process is monitored; when the air temperature is smaller than T1 and the air humidity is larger than R1, the working medium proportion of a compressor in the clothes dryer is set as follows: propylene: isobutane = (55-60): (40-45); when the air temperature is T2-T3 and the air humidity is R2-R3, the working medium proportion of a compressor in the clothes dryer is set as that propylene: isobutane = (40-45): (55-60); and when the air temperature is T4-T5 and the air humidity is R4-R5, the humidity decreasing rate, the temperature increasing rate and the drying time for the air humidity to reach R6 are calculated, the clothes type is recognized, the working medium proportion of a compressor in the clothes dryer is adjusted according to the clothes type, and the clothes drying effect and efficiency can be improved.

This application discloses a method for the conversion of C4-C6 alkanes. In a reactor, a raw material containing hydrogen and C4-C6 alkanes is contacted with a catalyst and reacted to obtain a product containing small molecule hydrocarbons; the C4-C6 alkanes are selected from at least one of n-butane, isobutane, n-pentane, isopentane, and 2,3-dimethylbutane; the small molecule hydrocarbons are selected from at least one of ethane, propane, n-butane, and n-pentane; the catalyst is prepared by the following steps: (1) mixing clay and sol, spray drying to obtain microspheres with a diameter of 1-50 μm; (2) immersing the microspheres in an aqueous solution containing a noble metal precursor, drying I, calcining I, and treating with a hydrogen atmosphere to obtain a catalyst precursor; (3) mixing the catalyst precursor, molecular sieve, and additives, rolling to form spheres, drying II, calcining II, and reducing to obtain the catalyst.

The utility model relates to the technical field of petroleum chemical industry discloses a double loop pipe polyethylene device, including reactor, the top transverse fixedly connected with support of reactor, the top fixedly connected with mixing mechanism of support. In the utility model, through the setting of driving motor, rotating lever and stirring rod, isopropanol can be injected into the inside of reactor and isobutane is mutually soluble, driving motor works when starting at this moment, driving motor work drives rotating lever to rotate clockwise, rotating lever rotation drives stirring rod to rotate, and stirring rod rotation pushes material flow, diffusion to the kinetic energy of isopropanol fluid in the inside of reactor, and the shear force produced by stirring can break the concentration gradient and phase interface in the inside of material, promotes the diffusion mixing of molecular level to accelerate the uniform mixing of both, makes fresh isobutane more efficiently dilutes isopropanol, shortens the time of replacement to qualified concentration, reduces the time -consuming of circulating replacement in traditional craft.

The present invention relates to antiperspirant and deodorant compositions for correction of body odour, and more particularly relates to antiperspirant and deodorant compositions for human hygiene. The disclosed anti-perspirant and deodorant composition comprises isobutane, propane, butane, cyclopentasiloxane, caprylic / capric triglyceride, stearalkonium hectorite, propylene carbonate, c12-15 alkyl benzoate, parfum, silver lactate, lactic acid, aqua, zea mays starch, menthyl ethylamido oxalate, argania spinosa kernel oil. Furthermore, the active antimicrobial silver ingredient is dermatologically tested and is capable of diminishing odor-causing bacteria in addition to prevention of irritation and itching.

The application discloses a method for normalizing isomeric alkanes, which comprises the following steps: contacting isomeric alkanes and hydrogen with a catalyst in a reactor to obtain normal alkanes; the isomeric alkanes are selected from at least one of isobutane and isopentane; the catalyst is composed of an acidic carrier, a noble metal active component supported on the surface of the acidic carrier and an auxiliary element; the noble metal active component is selected from at least one of Pt and Pd; the auxiliary element is selected from at least one of Ce, Sn, La, Fe, Co, Ni and Cu; and the carrier is selected from at least one of molecular sieve, Al2O3 modified SO4 2‑ -WO3-ZrO2; the mass ratio of the noble metal active component to the acidic carrier in the catalyst is 0.0001-0.01:1; and the mass ratio of the auxiliary element to the acidic carrier is 0.0001-0.008:1.

The invention relates to the technical field of chemical energy conservation, in particular to an alkylate rectification system and method.The system comprises a deisobutanizer and an n-butanizer, a tower top outlet of the deisobutanizer is connected with an isobutane extraction pipeline, a tower bottom outlet of the deisobutanizer is connected with the upper middle section of the n-butanizer, and a tower bottom outlet of the n-butanizer is connected with the lower middle section of the n-butanizer. A tower bottom outlet of the n-butane removal tower is connected with an alkylate oil extraction pipeline; a tower top outlet of the n-butane removal tower is connected with an inlet of the compressor, a heat source inlet of the first multi-stage heat supplier at the middle and lower sections of the isobutane removal tower is connected with an outlet of the compressor, a heat source outlet of the first multi-stage heat supplier is connected with an inlet of the pressure release valve, and an outlet of the pressure release valve is respectively connected with a tower top inlet of the n-butane removal tower and an n-butane extraction pipeline. The steam at the top of the n-butane removal tower is recompressed to be used for heat supply of the isobutane removal tower, low-grade energy can be converted into high-grade energy, heat distribution in the isobutane removal tower is optimized, consumption of the high-grade energy is reduced, and energy saving is achieved.

The systems and processes described can be used to produce a high-purity isobutane stream and a high-purity 1-butene stream from mixed C4 streams having disparate starting compositions.

The application belongs to the technical field of high-temperature wind tunnel combustion heater, and discloses an ignition starting device and method of high-total-temperature air liquid oxygen isobutane combustion heater. The ignition starting device comprises an isobutane supply system, an air supply system, a liquid oxygen supply system, an air-oxygen mixer, a combustion heater and key measurement points. The ignition starting method comprises a preparation stage, a combustion heater precooling stage and a combustion heater working stage. The ignition starting device and method of high-total-temperature air liquid oxygen isobutane combustion heater realize stable ignition starting and reliable thermal protection of the high-total-temperature working combustion heater by monitoring key point information in real time and designing valve opening sequence according to physical operation logic, and have engineering practical value.

This invention relates to the field of desulfurization and refining technology for light alkanes, and discloses a method for liquid-phase desulfurization of isobutane. This invention employs a transition metal-modified molecular sieve and a specialized liquid-phase desulfurization adsorbent that encapsulates hydrogen / hydrogen protons. Under liquid-phase conditions of 1.6-1.8 MPa and 30-40℃, various sulfides in isobutane are removed. The method operates through a dual-bed series switching mode, switching the bed sequence and replacing / regenerating the adsorbent when the total sulfur at the bed outlet is ≥0.3 ppm. For higher desulfurization precision requirements, it is preferable to switch the bed sequence earlier when the total sulfur at the bed outlet is ≥0.2 ppm, and more preferably ≥0.1 ppm. This invention can stably reduce the total sulfur in isobutane to below 0.3 ppm, preferably controlled to ≤0.2 ppm, and more preferably controlled to ≤0.1 ppm. It exhibits high adsorbent utilization and is suitable for continuous industrial production.

The invention relates to SBA-15 and SBA-16 controllable acidity molecular sieves and a preparation method thereof, a catalyst and an isobutane normalizing method, and belongs to the technical field of catalyst preparation. The preparation method of the molecular sieve comprises the following steps: mixing a silicon source, water, an organic template agent, salt of metal M and an acid solution, carrying out hydrothermal crystallization, carrying out solid-liquid separation on a crystallized product, and roasting a solid phase to obtain the molecular sieve. A surface active agent (an organic template agent) is adsorbed on the surface of layered silicate by utilizing a layered structure of the layered silicate, and after an outer layer is occupied by the surface active agent, metal and silicate of the inner layer act and are grafted to the inner layer of the layered silicate, so that loss of the metal of the outer layer is avoided; the acidity of the catalyst can be adjusted by adjusting the content of the metal. In the reaction process, an alkaline solution can be added on line, the outer layer material is dissolved, the second layer of layered material is exposed, and the reaction is circulated until the catalyst is completely inactivated, so that the service life of the catalyst is greatly prolonged.

The invention discloses a method for synthesizing a hierarchical pore MFI molecular sieve membrane based on a sacrificial crystal seed layer, and belongs to the field of zeolite molecular sieve membrane synthesis. The hierarchical pore MFI molecular sieve membrane with a compact selective top layer and a macroporous transition layer with high porosity is successfully constructed on a porous carrier through a surface wet gel secondary growth technology of a sacrificial crystal seed layer. The film layer structure and the gas separation performance are optimized by regulating and controlling the composition, the aging time and the crystallization time of the synthetic gel. The prepared hierarchical pore MFI molecular sieve membrane shows high permeability and excellent selectivity in n-butane / iso-butane separation, and the preparation process is good in repeatability, high in stability and suitable for industrial gas separation application.

The utility model relates to isobutane dehydrogenation feed technology field, concretely is C4 material refining device. C4 material refining device, including inlet and outlet heat exchanger A, inlet and outlet heat exchanger A is connected with hydrogenation reactor through feed heating furnace, hydrogenation reactor is connected with stable tower inlet and outlet heat exchanger through outlet buffer tank, stable tower inlet and outlet heat exchanger is connected with stable tower, and stable tower is connected with deisobutane column through connecting pipeline, and deisobutane column is connected with isomerization reactor through inlet and outlet heat exchanger B. The device is aimed at the isobutane dehydrogenation device C4 feed of rich normal butane, realizes the separation of normal butane and isobutane through deisobutane column, and normal butane can be side line and is extracted for other purposes, or is converted into isobutane through isomerization reaction and returns deisobutane column, improves the utilization efficiency of C4 material.

The application discloses high-silicon EMT molecular sieve and a synthesis method and application thereof, and belongs to the technical field of molecular sieves. The synthesis method of the EMT molecular sieve comprises the following steps: a) mixing an aluminum source Al 1 , a silicon source Si 1 , an alkali metal source M 1 , an organic template agent R 1 and water to obtain raw material I, and obtaining a directing agent after aging of the raw material I; b) mixing an aluminum source Al 2 , a silicon source Si 2 , an alkali metal source M 2 , an organic template agent R 2 and water to obtain raw material II, namely, an initial gel; c) adding the directing agent into the initial gel, stirring uniformly, and placing in a sealed reaction kettle to perform crystallization, so that the high-silicon EMT molecular sieve with an EMT topological structure is obtained. The EMT molecular sieve disclosed by the application has a high silicon-aluminum oxide ratio of 7-30, high crystallinity and purity, and good hydrothermal / thermal stability, and can be used in catalytic reactions such as production of high-octane gasoline through isobutane / 2-butene alkylation, and has important significance in actual chemical production.

This invention relates to a method for producing alkylates from a renewable hydrocarbon source, wherein the method includes the step of alkylating a first olefin feedstock comprising at least a portion of a C3 to C4 olefin that is at least of a renewable source, wherein the second feedstock comprises at least isobutane, wherein the second feedstock is obtained by partially or completely hydrogenating at least a portion of the first olefin feedstock to obtain a first effluent comprising a bio-alkylate, and wherein the alkylation step is carried out in the presence of an acid catalyst in liquid or solid form, at a temperature of -3°C to 90°C, at a pressure of 0.01 to 2.0 MPa absolute, and at a C3 to C4 olefin / isobutane ratio of 8 / 1 to 20 / 1 by volume.

Metal-containing ionic liquids can demonstrate a sharply increased viscosity relative to the same ionic liquids without the metal cation. Metal-containing ionic liquid compositions are disclosed that contain viscosity modifiers that reduce viscosity. Metal-containing ionic liquids are applicable to methods and within systems designed for the purpose of removing and recovering certain components of process streams such as ethylene, isobutane, or both. Methods for removing and recovering ethylene from process streams are also disclosed herein as having increased ethylene removal capacity concurrently with reductions in viscosity without corresponding reductions in metal cation concentrations.

The application discloses a method for preparing normal paraffin, comprising the following steps: contacting isomeric alkanes and hydrogen with a catalyst in a reactor, and reacting to obtain normal paraffin; the isomeric alkanes are selected from at least one of isobutane and isopentane; the catalyst is composed of a double-layer spherical carrier and a noble metal active component loaded on the surface of the double-layer spherical carrier; and the noble metal active component is selected from at least one of platinum, palladium and gold.

The present invention is directed to an aerosol foam composition comprising roflumilast, an emulsifier blend containing cetearyl alcohol, dicetyl phosphate, and ceteareth-10 phosphate and a hydrocarbon propellant. The aerosol foam composition is preferably an oil in water emulsion. The propellant is a mixture of liquefied hydrocarbon gases preferably a propane / isobutane / butane blend. The hydrocarbon propellant results in an aerosol foam which is stable, has consistent physical properties, excellent aesthetics, and no discernable degradation after long term or accelerated storage conditions.

The invention relates to the technical field of preparation of n-butane, and discloses an iso-butane normalizing method which comprises the following step: under the iso-butane normalizing reaction condition and in the presence of hydrogen, contacting an iso-butane raw material with a catalyst, the catalyst comprises an alumina carrier, an active metal component and an acidic component, wherein the active metal component and the acidic component are loaded on the alumina carrier; the alumina carrier has bimodal pore distribution of large pores and small pores, the most probable pore diameter of the small pores is 2-10 nm, and the most probable pore diameter of the large pores is 10-20 nm; the active metal component is selected from at least one of VIII group metals, and the acidic component is chlorine; on the basis of the weight of the alumina carrier, the content of the active metal component is 0.01-1 wt% and the content of the acidic component is 0.5-1.8 wt% in terms of elements. The method has high normalizing activity and high n-butane selectivity.

A technique of operating a gas phase fluidized bed polymerization reactor system may include feeding an olefin monomer and catalyst to a polymerization reactor. The monomer and the catalyst are contacted in a fluidized bed in the reactor to form a product including a polyolefin. A heat of polymerization is extracted from the reactor by recycling an inert condensable agent through the fluidized bed and condensing the inert condensable agent. The product is discharged from the reactor. The inert condensable agent includes propane, n-butane, or isobutane in a total mole fraction of greater than or equal to 0.50 of the inert condensable agent. A system including a gas phase fluidized bed polymerization reactor system may include a source of propane, n-butane, or isobutane for introduction into the polymerization system as an inert condensable agent. A loop slurry polymerization reactor system outlet may be the source of isobutane or propane.

This invention discloses a system and method for removing light hydrocarbons in the production of alkylate oil using the sulfuric acid process, relating to the field of sulfuric acid process alkylate oil production technology. The system for removing light hydrocarbons in the sulfuric acid process alkylate oil production of this invention includes: an alkylation reactor, a flash evaporator for the reaction products, a deacidification system for the reaction products, a deisobutane removal tower, and a light hydrocarbon removal tower. The top outlet of the deisobutane removal tower is connected to a cooler, and the cooler outlet pipeline is divided into three branches: one branch returns to the upper part of the deisobutane removal tower; one branch merges with the outlet pipeline of the light hydrocarbon removal tower and connects to the outlet pipeline of the alkylation reactor; and one branch connects to the middle part of the light hydrocarbon removal tower. This invention can remove light hydrocarbons below C4 from the reaction system and produce liquefied petroleum gas (LPG) without adding deacidification facilities, reducing the unit's energy consumption by more than 8 kg EO / t alkylate oil.