42 results about "Trifluoroiodomethane" patented technology

Provided is a working medium for a heat cycle, including trifluoroethylene, 1,1-difluoroethane, and trifluoroiodomethane, in which a proportion of 1,1-difluoroethane with respect to a total of trifluoroethylene and 1,1-difluoroethane is 57.5% by mass or less, a proportion of trifluoroiodomethane with respect to a total of trifluoroethylene, 1,1-difluoroethane, and trifluoroiodomethane is 24.5% by mass or less, and a total proportion of trifluoroethylene, 1,1-difluoroethane, and trifluoroiodomethane with respect to the working medium for a heat cycle as a whole is 75.0% by mass or more.

The invention provides a method and system for continuously preparing trifluoroiodomethane, and the method comprises the following steps in the same reactor: S1, inputting trifluoromethane, iodine vapor and air into the reactor, and reacting under the action of a catalyst to prepare trifluoroiodomethane; s2, when the reduction amplitude of the reaction yield relative to the initial reaction yield reaches a set threshold value, stopping inputting trifluoromethane and iodine vapor into the reactor, and continuously introducing air to regenerate the catalyst; and S3, after the regeneration of the catalyst is completed, repeatedly executing the steps S1 to S2. The preparation process of the mesoporous carrier used by the catalyst comprises the following steps: dispersing nano SiO2 spheres in a magnesium acetate or aluminum acetate solution, then adding an NH4F solution, and reacting under a stirring condition to obtain a mesoporous carrier precursor; and treating the mesoporous carrier precursor by adopting a solution etching method. According to the method for continuously preparing trifluoroiodomethane, the service life of the catalyst is long, the technological process is simple and efficient, and the regeneration difficulty of the catalyst is reduced.

The refrigerator oil according to an exemplary embodiment of the present disclosure includes a silane compound including at least one of a glycidyl group or an isocyanate group. A heat pump according to an exemplary embodiment of the present disclosure comprises: a heat exchanger comprising a heat exchanger comprising trifluoroiodomethane; r-13I1), and a refrigerant of R-13I1); and the refrigerating machine oil. The chemical stability of the refrigerator oil according to the present disclosure at high temperature and / or high pressure can be improved.

The present invention relates to a method for recovering unreacted iodine using an unreacted iodine recovery device comprising: a gas quenching device comprising a hollow cooling body into which a reaction gas mixture containing iodine (I2) discharged from a trifluoroiodmethane (CF3I) manufacturing process by the reaction of trifluoromethane (CF3H) and iodine (I2) is supplied to one side of the upper portion, and a first injection unit into which cooling water is sprayed from the upper portion of the cooling body; and a filtration device comprising a hollow filtration body having a filter with a plurality of through holes formed in the lower portion of the gas quenching device, and a second injection unit into which cleaning water is sprayed from the upper portion. A cooling step in which a high-temperature reaction gas mixture is supplied to the above-mentioned cooling body and cooling water is sprayed from the first injection part to cool the reaction gas mixture and gaseous iodine (I2) is precipitated, and The above aqueous solution and solid iodine (I2) flow into a filtration device and undergo a filtration step in which the aqueous solution and iodine (I2) are separated by a filter, and The present invention relates to a method for recovering unreacted iodine, characterized in that the iodine (I2) filtered by the above filter is cleaned by spraying cleaning water from a second spraying unit.

A mixed refrigerant composition includes carbon dioxide (R-744), 2,3,3,3-tetrafluoropropene (R-1234yf) and trifluoroiodomethane (R-13I1). A content of the carbon dioxide (R-744) ranges from 1 to 10 wt. % based on a total weight of the mixed refrigerant composition, and a sum of a content of the 2,3,3,3-tetrafluoropropene (R-1234yf) and a content of the trifluoroiodomethane (R-13I1) ranges from 90 to 99 wt. % based on the total weight of the mixed refrigerant composition. A boiling point at 1 atm of the mixed refrigerant composition ranges from −76 to −35° C.

To provide a method for purifying trifluoroiodomethane.SOLUTION: A method includes: providing a process stream comprising trifluoroiodomethane, organic impurities, and acid impurities; reacting the process stream with a basic aqueous solution, the basic aqueous solution comprising water and at least one base selected from the group consisting of an alkali metal carbonate and an alkali metal hydroxide; and separating at least some of the organic impurities from the process stream.SELECTED DRAWING: Figure 1

A refrigeration oil according to exemplary embodiments of the present disclosure comprises a silane compound containing at least one of a glycidyl group or an isocyanate group. A heat pump according to exemplary embodiments of the present disclosure comprises a refrigerant including trifluoroiodomethane (R-131I1) and the refrigeration oil.

The present disclosure provides a mixed refrigerant having four types of performance, i.e., an excellent coefficient of performance and refrigerating capacity that allow it to serve as an alternative refrigerant for R410A, a sufficiently low GWP, and non-flammability. Specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trifluoroiodomethane (CF3I) and difluoromethane (R32), wherein the contents of CF3I and R32 in the refrigerant are respectively 48 mass %≥CF3I≥46 mass % and 54 mass %≥R32≥52 mass %, based on the total amount of CF3I and R32 taken as 100 mass %.

The invention aims to provide a fire extinguishing agent or a fire retardant capable of being used for extensive fire disasters or preventing fire disasters, and belongs to the technical field of refrigeration heat pumps and the technical field of fire fighting, and the fire extinguishing agent or the fire retardant is composed of hexafluoropropylene, trifluoroiodomethane and 1, 1, 1, 2, 3, 3, 4-hexafluoropropylene. The novel mixed flame retardant is prepared from two or three components in 1, 1, 1, 3, 3, 3-heptafluoropropane by using a conventional physical mixing method. The flame retardant disclosed by the invention not only has excellent flame-retardant and fire-extinguishing effects, but also has excellent environmental protection performance, can be used as a novel mixed working medium component in a thermodynamic system, and has good cycle performance. In conclusion, the method has very good application effect and development potential.

A refrigerator oil according to exemplary embodiments of the present disclosure includes an amine-based phosphate compound. A heat pump according to exemplary embodiments of the present disclosure includes a refrigerant including trifluoroiodomethane (R-131I1) and the refrigerator oil.

The present invention relates to a refrigerant composition for an air conditioning device, the composition having characteristics similar to those of R410A, having a sufficiently low global warming coefficient (GWP), and comprising 1,1-difluoroethene (R1132a) and trifluoroiodomethane (R13I1).

To provide compositions and methods that may be used to prepare iodide-containing compounds, such as trifluoroiodomethane, of high purity.SOLUTION: Provided is a composition comprising an azeotropic or azeotrope-like composition, comprising 0.5 wt.% to 35.5 wt.% of trifluoroacetyl chloride (CF3COCl) and 64.5 wt.% to 99.5 wt.% of trifluoroiodomethane (CF3I).SELECTED DRAWING: Figure 1

The present disclosure provides a method for purifying trifluoroiodomethane. The method includes providing a process stream comprising trifluoroiodomethane, organic impurities, and acid impurities; reacting the process stream with a basic aqueous solution, the basic aqueous solution comprising water and at least one base selected from the group of an alkali metal carbonate and an alkali metal hydroxide; and separating at least some of the organic impurities from the process stream.

To solve the above problems, the present application provides a novel low-GWP mixed refrigerant. The present application provides a composition containing a refrigerant containing trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroiodomethane (CF3I), 2,3,3,3-tetrafluoro-1-propene (R1234yf), and difluoromethane (R32).

A mixed refrigerant composition includes carbon dioxide (R-744), 2,3,3,3-tetrafluoropropene (R-1234yf) and trifluoroiodomethane (R-13I1). A content of the carbon dioxide (R-744) ranges from 1 to 10 wt. % based on a total weight of the mixed refrigerant composition, and a sum of a content of the 2,3,3,3-tetrafluoropropene (R-1234yf) and a content of the trifluoroiodomethane (R-13I1) ranges from 90 to 99 wt. % based on the total weight of the mixed refrigerant composition. A boiling point at 1 atm of the mixed refrigerant composition ranges from −76 to −35° C.

A refrigeration cycle device comprises a refrigerant, a compressor that compresses the refrigerant, and a refrigerating machine oil that lubricates a sliding part of the compressor. The refrigerant includes trifluoroiodomethane. The refrigerating machine oil includes a base oil and a quinone additive. The quinone additive is at least one selected from the group consisting of 1,4-benzoquinone, 1,2-benzoquinone, 2-methyl-1,4-benzoquinone, 2-phenyl-1,4-benzoquinone, 2-tert-butyl-1,4-benzoquinone, 1,4-naphthoquinone, 1,2-naphthoquinone, 2,6-naphthoquinone, 2-hydroxy-1,4-naphthoquinone, and 1,4-anthraquinone.

The invention discloses a method and a device for preparing electronic-grade trifluoroiodomethane through photocatalytic halogenation. The method comprises the following steps: continuously reacting trifluoromethane and iodine serving as raw materials in a reactor through ultraviolet light illumination to generate trifluoroiodomethane and hydrogen iodide; by optimizing conditions such as reaction temperature, feeding rate and ultraviolet light illumination in the reaction process, the reaction conversion rate of trifluoromethane reaches 80% or above. Efficient iodine recovery is achieved through a low-temperature condensation mode of reaction products, a continuous rectification mode is adopted, trifluoromethane with the purity larger than or equal to 99.5% is obtained at the top of a recovery tower and recycled, a hydrogen iodide byproduct with the purity larger than or equal to 99.5% is obtained at the top of a light component removal tower, and a trifluoroiodomethane product with the purity larger than or equal to 99.999% is obtained at the top of a heavy component removal tower. Compared with the traditional process, the problems of short service life of the catalyst, low reaction conversion rate and low product purity in the reaction process are solved. The method is simple in process and easy to control, and stable industrial production of trifluoroiodomethane can be realized.

The invention discloses a synthesis method of trifluoromethyl sulfide, which comprises the following steps: in the presence of a catalyst, reacting trifluoroiodomethane with trifluoromethyl persulfane, and synthesizing to obtain the trifluoromethyl sulfide. The trifluoromethyl sulfide synthesis method provided by the invention has the advantages of few by-products and high reaction efficiency.

The invention discloses a synthesis method of trifluoroiodomethane. The synthesis method comprises the following steps: mixing raw materials CF3H, an oxygen source and iodine steam, and performing catalytic reaction to obtain a first product; and removing unreacted raw materials from the first product, and then carrying out alkali washing and adsorption to obtain the product. By optimizing the synthesis method, optimization and improvement in multiple aspects such as control of reaction temperature and feed ratio are realized, the reaction yield is increased to 40% or above, and the CF3I selectivity is increased to 80% or above.

A composition comprising trifluoroiodomethane (CF3I) and 1,1-difluoroethylene (R-1132a) is described. The composition can also comprise additional compounds, such as at least one non-flammable compound selected from the group consisting of carbon dioxide (CO2; R-744), tetrafluoromethane (R-14), trifluoromethane (R-23) and perfluoroethane (R-116) or at least one additional compound of lower volatility than 1,1-difluoroethylene selected from the group consisting of 1,1,2-trifluoroethylene (R-1123), difluoromethane (R-32), propane (R-290), propylene (R-1270), fluoroethane (R-161), pentafluoroethane (R-125), 1,1,1,2-tetrafluoroethane (R-134a), 2,3,3,3-tetrafluopropene (R-1234yf), isobutane (R-600a), n-butane (R-600), trans-1,3,3,3-tetrafluopropene (R-1234ze(E)), 3,3,3-trifluoropropene (R-1243zf), 1,2,3,3,3-pentafluoropropene (R-1225ye), 1, 1,1,2,3,3,3-heptafluoropropane (R-227ea), 1,1-difluoroethane (R-152a), cis-1,3,3,3-tetrafluopropene (R-1234ze(Z)), 1-chloro-3,3,3-trifluoropropene (R-1233zd(E / Z)) and 1,1,1,4,4,4-hexafluoro-2-butene (R-1336mzz(E / Z)). The compositions have utility as refrigerants in vapour compression heat transfer systems.

The application discloses a heat transfer composition for a heat pump air conditioner, which comprises: a first component, wherein the first component is trifluoroiodomethane, and the mass content is 1-40%; a second component, wherein the second component is 3,3,3-trifluoropropynyl, and the mass content is 1-60%; a third component, wherein the third component is selected from difluoromethane and / or cis-1,2-difluoroethylene, and the mass content is 1-25%; and a fourth component, wherein the fourth component is selected from at least one of trifluoroethylene, propane or hexafluoropropylene, and the mass content is 1-60%; and the total mass content of the first component, the second component, the third component and the fourth component is 100%. The heat transfer composition has excellent refrigeration performance and heating performance, especially outstanding heating performance in a low-temperature environment, and is suitable for being used as a heat transfer medium of a new energy automobile heat pump air conditioner system.

The invention provides an environment-friendly ternary refrigerant and a preparation method thereof, and relates to the field of refrigerants. The invention relates to a fluoropropene polymer, which is prepared from the following components in percentage by mass: 20 to 30 percent of R13I1 trifluoroiodomethane, 30 to 40 percent of R1216 hexafluoropropylene and 30 to 40 percent of HFO-1234yf 2, 3, 3, 3-tetrafluoropropene. The preparation method comprises the following steps: S1, initial mixing: R13I1 trifluoroiodomethane, R1216 hexafluoropropylene and HFO-1234yf 2, 3, 3, 3-tetrafluoropropene are injected into a static micro-channel mixer according to a ratio, S2, gradient cooling: the temperature is reduced from 50 DEG C to 30 DEG C, the cooling rate is 2-3 DEG C / min, then heat preservation is performed for 10-12 min, and the pressure is 8 MPa; the temperature is reduced to 0 DEG C from 30 DEG C, the cooling rate is 1.5-2 DEG C / min, and the pressure is reduced to 5 MPa; the temperature is reduced from 0 DEG C to-20 DEG C, the cooling rate is 1-1.5 DEG C / min, and the temperature is maintained for 2-2.5 h under the conditions of-20 DEG C and 5 MPa to obtain a mixed solution; and S3, adding the composite flame retardant: adding the composite flame retardant subjected to ultrasonic dispersion into the mixed solution, and performing uniform ultrasonic dispersion to obtain the refrigerant. The GWP value of the mixed refrigerant is reduced to 300 or below, and meanwhile, the mixed refrigerant is kept non-flammable or weak flammability (A1 level).

The application provides a refrigerant and a preparation method thereof. The refrigerant is combined by a first component, a second component and a third component, wherein the first component is 3,3,3-trifluoropropynyl, the second component is 1,1-difluoroethane, and the third component is trifluoroiodomethane or one of 2,3,3,3-tetrafluoropropene; in the refrigerant, the content of the first component is a first preset value, the content of the second component is a second preset value, and the content of the third component is a third preset value; the first preset value, the second preset value and the third preset value are greater than zero and the sum is 100 percent. The refrigerant is combined by three components, the GWP is less than 150, the ODP is 0, and the refrigerant has obvious environmental protection advantages; meanwhile, the environmental protection mixed refrigerant has similar thermal performance and unit volume refrigerating capacity to R290. Compared with R290, the safety of the mixed refrigerant is obviously improved, and the safety grade is better than that of R290.

To reduce a load on a distillation process by bringing trifluoroiodomethane into contact with an alkaline medium as a pretreatment when distilling the trifluoroiodomethane to remove hydrogen fluoride gas, carbon dioxide gas and the like contained in the trifluoroiodomethane.SOLUTION: In the method for producing high-purity trifluoroiodomethane, trifluoromethane is reacted with iodine to produce trifluoroiodomethane, and the obtained trifluoroiodomethane is brought into contact with an alkaline solvent so that the content ratios of (a) carbon dioxide (CO2) and (b) hydrogen fluoride (HF) on the basis of peak areas determined by gas chromatography and / or ion chromatography are (a) ≤ 0.0010% and (b) ≤ 0.0010%, respectively, and the content of trifluoroiodomethane is 99.7% or more.SELECTED DRAWING: None

The present application relates to the technical field of electrical equipment state monitoring, and is a kind of gas insulated equipment monitoring and fault analysis method and device, the former is carried out according to the following method: first, before the operation of the gas insulated equipment, inject the required amount of trifluoroiodomethane into the sulfur hexafluoride gas of each gas chamber of the gas insulated equipment;Second, when the gas insulated equipment is running or fault shutdown, the water content and iodine ion content in the sulfur hexafluoride gas of each gas chamber are monitored, and the running state of the gas insulated equipment is evaluated and analyzed according to the water content and iodine ion content in the sulfur hexafluoride gas.The present application avoids the huge difference between the running state and shutdown state detection data of the gas insulated equipment, improves the monitoring accuracy, and monitors the actual running state of the equipment online, providing a reliable evaluation basis for the running state and fault analysis of the gas insulated equipment.

A refrigeration oil according to embodiments of the present disclosure includes a silane compound having at least one of a glycidyl group and an isocyanate group. The heat pump according to embodiments of the present disclosure includes a refrigerant including trifluoroiodomethane (R-1311) and the refrigeration oil including a silane compound having at least one of a glycidyl group and an isocyanate group.

This invention discloses a method for producing trifluoroiodomethane (CF3I), the method comprising: providing a feedstock containing trifluoroacetyl iodide (TFAI); passing the feedstock through at least one tower loaded with carbon-containing material to remove hydrogen iodide (HI), hydrogen triiodide (HI3), and iodine (I2) from the feedstock; and providing the feedstock to a reactor to produce a trifluoroiodomethane product stream. Another method for producing trifluoroiodomethane (CF3I) comprises: providing a feedstock containing trifluoroacetyl iodide (TFAI) to a reactor to produce a trifluoroiodomethane product stream; and passing the trifluoroiodomethane product stream from the reactor through at least one tower loaded with carbon-containing material to remove hydrogen iodide (HI), hydrogen triiodide (HI3), and iodine (I2) from the trifluoroiodomethane product stream.

This invention discloses a method for removing impurities such as sulfur dioxide (SO2) from trifluoroacetyl chloride (TFAC) by distillation, adsorption, or a combination thereof, and / or by forming an azeotropic or azeotropic composition comprising effective amounts of sulfur dioxide (SO2) and trifluoroacetyl chloride (TFAC). The thus purified trifluoroacetyl chloride (TFAC) can then be used to prepare trifluoroiodomethane (CF3I). Azeotropic and azeotropic compositions of sulfur dioxide (SO2) and trifluoroacetyl chloride (TFAC) are also disclosed.

The mixed refrigerant composition according to embodiments of the present disclosure includes carbon dioxide (R-744), trifluoroiodomethane (R-13I1), and 1,1-difluoroethane (R-152a), wherein a sum of contents of the trifluoroiodomethane (R-13I1) and the 1,1-difluoroethane (R-152a) based on a total weight of the mixed refrigerant composition may be 60 wt. % or more and less than 100 wt. %. Accordingly, environmental pollution caused by the mixed refrigerant composition may be suppressed, and the cooling performance of the mixed refrigerant composition may be improved.

The invention discloses a refrigerant composition which comprises the following components in percentage by mass: 55%-57.5% of difluoromethane (R32), 38.4%-41.5% of trans-1, 2-difluoroethylene (R1132E) and 2.5%-5% of trifluoroiodomethane (R13I1), the global warming potential value (GWP) of the refrigerant composition is smaller than or equal to 450, and the refrigerant composition has the characteristic that the refrigerant composition has the characteristic that the refrigerant composition has the characteristic that the refrigerant composition has the characteristic that the refrigerant composition has the characteristic that the refrigerant composition has the characteristic that the refrigerant composition has the characteristic that the refrigerant composition has the characteristic that the refrigerant composition has the characteristic that the refrigerant composition has the characteristic that the refrigerant composition has the All the components of the refrigerant composition have the remarkable advantages of being low in GWP within a certain content range, good in refrigeration effect, low in flammability, good in combustion suppression effect and environmentally friendly.