60 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.

To provide a mixed refrigerant composition with improved environmental friendliness, and a heat pump which includes the mixed refrigerant composition.SOLUTION: A mixed refrigerant composition according to exemplary embodiments includes carbon dioxide (R-744), 2,3,3,3-tetrafluoropropene (R-1234yf) and trifluoroiodomethane (R-13I1). A content of the carbon dioxide (R-744) may be 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) may be 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 may be -76 to -35°C.SELECTED DRAWING: Figure 1

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 present invention provides a composition comprising carbon dioxide (C02, R-744), difluoromethane (R-32) and trifluoroiodomethane (CF3I) and the use of such a composition as a working fluid in a heat transfer system, such as a refrigeration, heat pump or air conditioning system.

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 invention discloses a preparation method of trifluoroiodomethane, which comprises the following steps: in an organic solvent, under the action of a catalyst, trifluoroacetic acid, elemental iodine and oxygen react to obtain trifluoroiodomethane, and the catalyst is a mixed catalyst of an amide compound and 4-dimethylaminopyridine. The method has the advantages of mild reaction conditions, high iodine atom utilization rate, small three-waste amount, suitability for industrial production and the like.

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.

A working medium for heat cycles, which contains trifluoroethylene, 1, 1-difluoroethane, and trifluoroiodomethane, and wherein the ratio of 1, 1-difluoroethane to the total of trifluoroethylene and 1, 1-difluoroethane is 57.5 mass% or less, and the ratio of trifluoroiodomethane to trifluoroethylene, 1, 1-difluoroethane to the total of trifluoroethylene and 1, 1-difluoroethane is 57.5 mass% or less, and the ratio of trifluoroiodomethane to the total of trifluoroethylene and 1, 1-difluoroethane is 57.5 mass% or less. The ratio of the total of trifluoroethylene, 1, 1-difluoroethane and trifluoroiodomethane is 24.5 mass% or less, and the ratio of the total of trifluoroethylene, 1, 1-difluoroethane and trifluoroiodomethane is 75.0 mass% or more relative to the entire working medium for heat cycles.

The present invention relates to a refrigerant composition for an air conditioning device, which has characteristics similar to those of R410A, has a sufficiently low global warming potential (GWP), and contains trifluoroethylene and trifluoroiodomethane.

The present application relates to a refrigerant and its use, wherein the refrigerant includes a first component, a second component, a third component and a fourth component, wherein the first component is trifluoroiodomethane; the second component is 1,1,2-trifluoroethylene, the third component is propane; the fourth component includes at least one of 1,1-difluoroethane, 2,3,3,3-tetrafluoropropylene and trans-1,3,3,3-tetrafluoropropylene. In a liquid phase at room temperature and pressure, the first component, the second component, the third component and the fourth component are mixed to obtain a refrigerant, the GWP of the refrigerant is less than 50, the ODP is 0, and it has obvious environmental advantages. At the same time, the thermal performance and unit volume refrigeration capacity of the environmentally friendly mixed refrigerant are similar to those of R290. Compared with R290, the safety of the mixed refrigerant is significantly improved, and the safety level of the mixed refrigerant is better than that of R290, and it can be used in air conditioners.

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).

The invention belongs to the field of precise regulation of environmental temperature and humidity, discloses an environmentally friendly heat transfer working medium matched with a constant temperature and humidity air conditioning system, proposes three components including 3,3,3-trifluoropropylene (CH2=CHCF3), monofluoroethane (CH3CH2F) and trifluoroiodomethane (CF3I), and further mixes a performance regulator, wherein the performance regulator is one of 1,1,2,2-tetrafluoroethane (CHF2CHF2), trans-1,3,3,3-tetrafluoropropylene (trans-CHF=CHCF3) and hexafluoropropylene (CF3=CF3), thereby forming a quaternary mixed heat transfer working medium with excellent comprehensive performance, so as to replace the high greenhouse effect working medium commonly used in existing air conditioners, and is specially used in constant temperature and humidity air conditioning units. Compared with R134a and R410A widely used in current ordinary air conditioners, the GWP value of the present invention is greatly reduced, which is very consistent with the "dual carbon" development strategy. Moreover, the operating pressure is comparable to that of R134a, meeting the basic requirements of the "direct injection substitution" working fluid substitution method. It has the technical advantage of being compatible with some components of the current R134a system, and the refrigeration cycle performance coefficient is higher than that of R134a and R410A, with significant energy-saving significance. The exhaust temperature is not high, which is of positive significance for optimizing the compression process.

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 invention discloses a method for continuously preparing trifluoroiodomethane. The method specifically comprises the following steps: in a continuous reactor, in the presence of a fluorination catalyst and a dehydration catalyst, reacting carbonyl fluoride, hydrogen iodide and hydrogen fluoride at the reaction temperature of 100-400 DEG C to obtain trifluoroiodomethane. The preparation method has the advantages of few three wastes, environmental friendliness, suitability for industrial production and the like.

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.

The present application provides a refrigerant and a method for preparing the same. The refrigerant is composed of a first component, a second component and a third component, wherein: the first component is 3,3,3-trifluoropropyne; the second component is trifluoroiodomethane; the third component is one of propylene or fluoroethane; 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; satisfying: the first preset value, the second preset value and the third preset value are all greater than zero, and the sum is 100%. The present application is a refrigerant composed of three components, with a GWP of less than 150 and an ODP of 0. Under the premise of ensuring good environmental performance of the refrigerant, the thermal performance is equivalent to R290, and the flammability is greatly reduced, which can solve the technical problems of high flammability and poor safety performance of R290 refrigerant.

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 belongs to the technical field of refrigerants, and particularly relates to a nano refrigerant and application thereof. The nano refrigerant comprises the following components in parts by weight: 10 to 35 parts of fluoroethane R161; 30 to 75 parts of tetrafluoropropene R1234YF; 10 to 25 parts of trifluoroiodomethane R13I1; and 2-5 parts of a metal nano material. The refrigerant provided by the invention is green, energy-saving and environment-friendly.

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 present invention relates to a method for recovering unreacted iodine by using an unreacted iodine recovery apparatus comprising: a gas quenching device including a hollow cooling body, to an upper side portion of which is supplied a reaction gas mixture including iodine (I2) discharged in the process of production of trifluoroiodomethane (CF3H) by a reaction of trifluoromethane (CF3H) and iodine (I2), and a first spraying unit for spraying coolant from the upper portion of the cooling body; and a filtering device including, below the gas quenching device, a hollow filtering body provided with a filter having a plurality of through-holes, and a second spraying unit for spraying cleaning water from the upper portion of the filtering device, the method comprising: a cooling step in which a high-temperature reaction gas mixture is supplied to the cooling body, cooling water is sprayed from the first spraying unit to cool the reaction gas mixture, and gaseous iodine (I2) is precipitated; a filtering step in which the aqueous solution and solid iodine (I2) flow into the filtering device to separate the aqueous solution and iodine (I2) through the filter; and a cleaning step in which the iodine (I2) filtered through the filter is cleaned by spraying the cleaning water from the second spray unit.

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.