247 results about "Isobutane" patented technology

The invention relates to a membrane separation method and device for separating 1, 3-butadiene from a C4 hydrocarbon mixture. According to the membrane separation method, a C4 hydrocarbon mixture is used as a raw material and is separated through an MOF membrane, and 1, 3-butadiene is obtained on the permeation side of the membrane; the C4 hydrocarbon mixture comprises 1, 3-butadiene, and further comprises one or a combination of more selected from the group consisting of n-butene, isobutene, n-butane, isobutane, cis-2-butene and trans-2-butene; and the MOF film is selected from one or a combination of more of MIL-53, Co-gallate, Al-bttotb, MIL-160, UiO-66, ZIF-7, ZIF-8 and ZIF-90, and the MOF film is selected from one or a combination of more of MIL-53, Co-gallate, Al-bttotb, MIL-160, UiO-66, ZIF-7, ZIF-8 and ZIF-90. The separation is carried out in an MOF membrane separation device, the MOF membrane separation device comprises an MOF membrane separator, and the MOF membrane separator comprises an MOF membrane assembly and the MOF membrane. According to the method, a membrane separation technology is adopted, so that high-purity 1, 3-butadiene can be efficiently obtained in a manner of increasing the productivity.

The utility model relates to an energy-saving production device for preparing methyl tert-butyl ether by an isobutane dehydrogenation method. A raw material gasifier is arranged between the catalytic distillation tower feeding and discharging heat exchanger and the catalytic distillation tower, a temperature sensor is arranged on a feeding pipeline from the raw material gasifier to the catalytic distillation tower, a gas phase at the top of the catalytic distillation tower is divided into two pipelines, a compressor is additionally arranged on one pipeline, and an automatic flow regulating valve is additionally arranged on the other pipeline; a cold-side material outlet of the distillation tower feeding and discharging heat exchanger is connected with a cold-side material inlet of the raw material gasifier, a cold-side material outlet of the raw material gasifier is connected with a feeding hole in the middle lower part of the catalytic distillation tower, and a tower top discharging pipeline of the catalytic distillation tower is respectively connected with an inlet of the compressor and a hot-side material inlet of the condenser; an outlet pipeline of the compressor is connected with a hot measuring material inlet of the raw material gasifier, and a hot measuring material outlet of the raw material gasifier is connected with a liquid inlet of the return tank. According to the utility model, a heat pump technology is adopted, so that the heating power of the tower kettle reboiler is reduced, and the steam consumption is reduced; and the method is more economical.

The invention relates to the technical field of chemical separation, and discloses an isomerization system and process for 1-butene in etherified C4. Comprising an isomerization reactor, a coalescer, a heat exchanger, a static mixer and a filter, an inlet of the coalescer is connected with an etherified C4 pipeline, an outlet pipeline of the coalescer penetrates through the heat exchanger to be connected with an inlet of the static mixer, the inlet of the static mixer is further connected with a hydrogen pipeline, and an outlet of the static mixer is connected with an inlet of the isomerization reactor. An isomerization reactor outlet is connected with a filter inlet, and a filter outlet pipeline enters the isobutane separation tower. According to the method, 1-butene in etherified C4 is isomerized, and after 1-butene is isomerized into 2-butene by utilizing the relatively small relative volatility of 1-butene and iso-butane and the relatively large relative volatility of 2-butene and iso-butane, the content of 1-butene in the raw material is reduced, the separation difficulty of iso-butane is reduced, and iso-butane with the same purity is obtained; the reflux ratio of the isobutane separation tower can be reduced, and the purpose of saving energy is achieved.

Environmentally friendly refrigerant blends utilizing refrigerants including 2,3,3,3-tetrafluoropropene (HFO-1234yf), 1,2-difluoroethylene, at least one hydrocarbon selected from the group consisting of propane, cyclopropane, propylene, isobutane, and n-butane, and optionally 1,1-difluoroethane (HFC-152a). The blends have low GWP, low toxicity, and low flammability with low temperature glide for use in a hybrid, mild hybrid, plug-in hybrid, or full electric vehicles for thermal management (transferring heat from one part of the vehicle to the other) of the passenger compartment providing air conditioning (A / C) or heating to the passenger cabin.

The invention discloses a high-silicon EMT molecular sieve as well as 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 A1, a silicon source Si1, an alkali metal source M1, an organic template agent R1 and water to obtain a raw material I, and aging the raw material I to obtain a guiding agent; b) mixing an aluminum source A2, a silicon source Si2, an alkali metal source M2, an organic template agent R2 and water to obtain a raw material II, namely initial gel; and c) adding the guiding agent into the initial gel, uniformly stirring, and crystallizing in a sealed reaction kettle to obtain the high-silicon EMT molecular sieve with the EMT topological structure. The EMT molecular sieve provided by the invention has a silicon-aluminum oxide ratio of 7-30, high crystallinity and purity, and good hydrothermal / thermal stability, can be used for catalytic reactions such as production of high-octane gasoline by alkylation of isobutane / 2-butene, and has important significance in actual chemical production.

The invention relates to the technical field of iso-butane production, and discloses iso-butane production equipment which comprises a reaction kettle, a motor is mounted on the reaction kettle, a transmission shaft is rotationally connected to the upper portion of the reaction kettle, a revolution frame is rotationally connected to the inner wall of the transmission shaft, the revolution frame and the transmission shaft are driven by the motor, and the revolution frame is rotationally connected with the reaction kettle. The transmission shaft is sleeved with a reciprocating frame, a reciprocating driving module for driving the reciprocating frame to reciprocate in the axis direction of the reaction kettle is installed on the revolution frame, two liquid mixing tables are slidably connected to the inner wall of the revolution frame, and connecting rods are hinged between the two liquid mixing tables and the reciprocating frame. When the movable-point displacement type multi-angle mixing device works, movable-point displacement type multi-angle mixing operation of raw materials in the reaction kettle can be achieved, and when the motor outputs the rotating speed, through the arrangement of the reciprocating toothed plate, the missing gear and the spring, after the motor outputs the rotating speed, the reciprocating frame can reciprocate in the set stroke in the axis direction of the reaction kettle.

The invention belongs to the technical field of olefin catalysts prepared through alkane dehydrogenation, and particularly discloses a catalyst for preparing isobutene through direct dehydrogenation of isobutane as well as a preparation method and application of the catalyst. According to the preparation method, polyvinylpyrrolidone, Cr (NO3) 3.9 H2O and Al (NO3) 3.9 H2O are used as raw materials, and the catalyst is obtained through stirring and mixing, liquid nitrogen solidification, vacuum freeze drying and calcination. Wherein the Cr species is CrOx (x = 1-3) which is an active component playing a catalytic role, and the aluminum species is Al2O3 which plays a carrier role and is used for dispersing the active component. A small amount of transition metal or alkali metal can be introduced as an auxiliary agent. The catalyst disclosed by the invention has a relatively high specific surface area, the dispersity of a Cr element can be remarkably improved, and the activity of the catalyst in a catalytic reaction is improved; the interaction between Cr and the carrier is increased, and the stability of the reaction for producing isobutene through dehydrogenation of isobutane is remarkably enhanced; and the reaction temperature range of the reaction suitable for preparing isobutene through isobutane dehydrogenation is wide.

The invention provides an alkylation product separation system, a separation method, an alkylation process system and a method. A liquid phase discharge port of an isobutane fractionation device in the separation system is connected with a feed pipeline of an n-butane fractionation device through an isobutane tower bottom pump; the propane compression refrigeration device comprises an isobutane overhead condenser, a throttling expansion valve, a circulating water cooler, a refrigeration compressor and a refrigerant tank, the isobutane overhead condenser is arranged at the top of the low-temperature isobutane rectifying tower, and a gas phase at the top of the low-temperature isobutane rectifying tower is cooled and refluxed; a refrigerant liquid phase inlet of the isobutane overhead condenser is connected with a gas phase outlet of the refrigerant tank through the throttling expansion valve, the circulating water cooler and the refrigeration compressor in sequence, and a gas phase refrigerant of the isobutane overhead condenser is mixed with part of liquid phase of the throttling expansion valve through a pipeline and input into the refrigerant tank. The low-temperature isobutane rectifying tower adopting low-temperature heat supply at the tower bottom is combined with a high-energy-efficiency compression refrigeration system for cooling at the tower top, so that the separation difficulty is effectively reduced, the energy utilization rate is improved, and the separation energy consumption and the process cost are saved.

The invention discloses an MFI type molecular sieve membrane as well as a controllable preparation method and application thereof, and relates to the technical field of inorganic membrane material preparation, the residual amount of an organic template agent in membrane pores is adjusted by controlling ozone calcination conditions, the pore diameter of the membrane is accurately regulated and controlled, the organic template agent in the pores is gradually oxidized and removed along with the prolonging of calcination time, and the pore diameter of the membrane is reduced. The preparation method comprises the following steps: preparing a seed crystal reaction gel, preparing an MFI type molecular sieve seed crystal, preparing a support body seed crystal, preliminarily preparing the MFI type molecular sieve membrane, and preparing the MFI type molecular sieve membrane. The prepared MFI type molecular sieve membrane has excellent performance on separation of small-size molecules and large-size molecules and can be used for separation of system gases such as hydrogen / iso-butane, methane / iso-butane and n-butane / iso-butane, the preparation process is simpler and more convenient, and the separation effect on the small-size molecules and the large-size molecules is more efficient; therefore, the separation requirements under different conditions are met.

A method for forming an extruded polystyrene foam comprises: (a) providing a thermoplastic melt and a blowing agent in the melt, the blowing agent comprising: (1) from about 10% to about 50% by weight of HCFO-1233zd (E); (2) from about 35% by weight to about 75% by weight of HFC-134a; (3) from about 10% to about 30% by weight of isobutane; and (4) optionally up to about 15% by weight of dimethyl ether; and (b) foaming the thermoplastic material.

The invention discloses an isobutane oxidation method and system. The method comprises the following steps: 1) mixing gas flow rich in isobutane and gas flow rich in nitrogen to prepare first carrier gas for later use; 2) uniformly mixing oxygen with a first carrier gas in proportion to obtain an oxygen-containing gas flow with the oxygen concentration of 1-10vol%; 3) feeding the oxygen-containing gas flow into the bottom of the reactor to react with liquid-phase iso-butane entering the reactor to generate tert-butyl hydroperoxide.The method ensures operability and safety of iso-butane oxidation reaction by setting two-component carrier gas of iso-butane and nitrogen in different proportions and introducing oxygen with safe concentration into the reactor through preparation, and is suitable for industrial production. Moreover, nitrogen circulation in the carrier gas is separately arranged, only one compressor needs to be arranged for a system with multiple reactors, meanwhile, liquid-phase materials of the multiple oxidation reactors overflow to the next stage by means of gravity, an inter-stage conveying pump is omitted, and equipment investment is reduced.

The invention belongs to the technical field of gas separation membranes, and discloses a novel polymer blended carbon molecular sieve membrane for butadiene / butane separation and a preparation method thereof. The polymer blended carbon molecular sieve membrane is prepared by an improved method which comprises the following steps: firstly, introducing a fluorenyl structure into polyimide to prepare high-carbon-content and high-rigidity copolyimide so as to prevent serious pore channel collapse in a carbonization process, and then blending with a polymer with good pore-forming capability according to a certain proportion. The obtained polymer is blended to prepare a flat and uniform flat sheet membrane through a solvent evaporation method, and the flat sheet membrane is carbonized through an improved pyrolysis procedure, so that the prepared carbon molecular sieve membrane has a micropore-ultramicropore structure with uniform size distribution and good mechanical properties; the catalyst shows excellent gas separation performance in butadiene / n-butane, butadiene / iso-butane and other systems, and can effectively solve the industrial problem of high energy consumption of C4 fraction separation.

The utility model provides a system for separating n-butane and iso-butane through differential pressure thermal coupling rectification, which comprises an iso-butane separation tower A, an iso-butane separation tower B, a tower A reflux tank, a tower B reflux tank, a tower A condenser, a cooler or heater, a tower A reboiler, a tower B reboiler, a tower A reflux pump and a tower B reflux pump, the tower A condenser, the tower A reflux tank and the tower A reflux pump are sequentially arranged on a tower top material pipeline of the isobutane separation tower A, the tower A reboiler is arranged at the tower bottom of the isobutane separation tower A, and the tower B reboiler is arranged at the tower bottom of the isobutane separation tower B. According to the system, an isobutane separation tower A serves as a low-temperature low-pressure tower, an isobutane separation tower B serves as a high-temperature high-pressure tower, condensation heat at the tower top of the isobutane separation tower B serves as a heat source of a reboiler at the tower bottom of the isobutane separation tower A, and the isobutane separation tower A and the isobutane separation tower B are thermally coupled; the steam consumption of the isobutane separation tower A is reduced, the refrigerant consumption at the tower top of the isobutane separation tower B is reduced, and the energy consumption is reduced.

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.

The invention relates to a fluorescent whitening agent for absorbing sunlight ultraviolet rays and a preparation method and application thereof, and the structural formula is as follows: # imgabs0: a method for dissolving 2, 5-dihydroxy dimethyl terephthalate in N, N-dimethylformamide, adding potassium carbonate and bromo-isobutane, heating to 80 DEG C, and stirring to react for 10 hours; adding an extracting solution ethyl acetate and water, extracting, drying an organic phase by using a drying agent, filtering, and carrying out reduced-pressure rotary evaporation concentration to obtain a crude product; and performing column chromatography on the crude product to obtain the fluorescent whitening agent A. The fluorescent whitening agent is applied to a whitening process for papermaking, textile printing and dyeing or plastic processing. The structure is relatively simple, the preparation method is easy, and the material has excellent ultraviolet absorption and fluorescence emission performance.

A dividing wall column is used in an alkylation process flow scheme to fractionate an alkylate reactor effluent to produce an iso-butane-rich stream as a recycle feed for the alkylation reactor while also separating iso-butane, normal butane and alkylate as separate product streams depending on the reactor effluent composition. In an optional embodiment, the scheme may contain propane.

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.

An instrument-grade, blended hydrocarbon refrigerant gas that can be utilized in both existing air conditioning systems and that is suitable for air conditioning systems in hybrid vehicles and EV's. The instrument-grade blended hydrocarbon refrigerant gas is a mix of propane and butane, either iso-butane or n-butane, at a selected ratio and serves as an environmentally friendly substitute for hydrofluoro refrigerant gases such as hydrofluorocarbon refrigerant gas and hydrofluoro-olefin refrigerant gas.

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 Co-based molecular sieve isobutane dehydrogenation catalyst and a preparation method and application thereof. The preparation method comprises the following steps: mixing a cobalt source, a silicon source, a template agent and an alkali source, and carrying out ball milling treatment to obtain a solid mixture; and crystallizing and roasting the solid mixture to obtain the Co-based molecular sieve isobutane dehydrogenation catalyst. The ball milling treatment is that the ball milling is paused for 10-30 minutes every 20-40 minutes, and the time of the whole ball milling treatment process is 0.5-5 hours; the rotating speed of the ball milling treatment is 500-1000 r / min; the molar ratio of cobalt in the cobalt source to silicon in the silicon source to the template agent to the alkali source is (0.0001-0.002): 1: (0.1-1): (0.01-0.1). The Co-based molecular sieve isobutane dehydrogenation catalyst has high activity in an isobutane dehydrogenation reaction, still has high stability after the reaction for a period of time, is uniform in Co component dispersion, and has a good industrial application prospect.

A process for the purification of isobutene from a C4 stream with at least 1-butene, 2-butene, isobutane and isobutene includes isomerizing 1-butene from a stream of material which is concentrated in isobutane and isobutene obtained from the C4 stream into 2-butene, using a catalyst in an isomerization reactor; supplying a product stream from the isomerization reactor to a rectification column; and providing a stream of material which is concentrated in isobutene. A processing facility is utilized for the purification of isobutene from the C4 stream.

The utility model relates to the technical field of petrochemical engineering, and discloses a pressure relief pipeline device for reducing the operating pressure of a deisobutanizer, which comprises a deisobutanizer return tank and a compressor liquid separation tank, and further comprises a tank body internally provided with a mounting area; the bearing frame is arranged on the inner side of the tank body and located in the mounting area of the tank body; the spiral cooling component is arranged on the bearing frame and located in the mounting area of the tank body, a feeding pipe is further arranged on the spiral cooling component, the other end of the feeding pipe is communicated with the deisobutanizer return tank, and an isobutane gas-liquid mixture output by the deisobutanizer return tank can enter the spiral cooling component through the feeding pipe and is cooled through the spiral cooling component. And gaseous isobutane is converted into liquid isobutane under the cooling action of the spiral cooling component. The pressure relief pipeline device for reducing the operating pressure of the deisobutanizer aims at solving the problems that a deisobutanizer in an existing alkylation device is too high in operating pressure, large in energy consumption and limited in flexibility.

The invention relates to the technical field of gas turbine waste heat utilization, and discloses a waste heat utilization power generation device and method applied to a pure condensing peak shaving gas turbine. The device comprises a closed loop taking isobutane as a cycle working medium, a waste heat-organic working medium heat exchanger, an isobutane turbine generator set, a condensation backflow part and a control system. After the gas turbine is shut down, heat storage steam or hot water is led out from the waste heat boiler steam-water system, heat energy is transmitted to isobutane through the heat exchanger, the isobutane is evaporated into superheated steam and drives the turbine generator set to generate electricity, and working media after acting are pumped into the heat exchanger again through the condensation backflow part to complete circulation. Isobutane is adopted as a working medium, the system adapts to medium and low temperature and transient heat source characteristics, stable grid connection is achieved through the clutch transmission mechanism, the control system dynamically adjusts operation parameters, the problem that heat stored in the waste heat boiler cannot be recycled after the pure condensing peak shaving gas turbine stops is effectively solved, and the energy utilization efficiency and the power plant economy are remarkably improved.

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.