11 results about "Zeotropic mixture" patented technology

The present invention discloses an adjustable large-temperature step-cross phase-change heat storage mixed working fluid high-temperature heat pump system, which belongs to the technical field of high-temperature heat pump systems. It includes a high-temperature heat pump circulation module and an open water supply module; the high-temperature heat pump circulation module is a circulation loop on the working fluid side, including a compressor, the working fluid side of three condensers, two gas-liquid separators, an evaporator and the working fluid side of three heat accumulators, and the circulating working fluid is an environmentally friendly binary non-azeotropic mixture; the open water supply module is an open loop on the water side, including a water pump, the water side of three condensers and the water side of three heat accumulators, and the working fluid on the water side is water. The present invention has three working conditions, namely direct heating working condition, heat accumulator heat storage working condition, and heat accumulator heat release working condition; the direct heating working condition achieves a reduction of irreversible losses by at least 14%; the heat accumulator heat storage working condition achieves a reduction of irreversible losses in the heat exchange process by at least 9%; the heat accumulator heat release working condition achieves an effective reduction of irreversible losses in the heat release process by at least 31%, thereby improving energy utilization.

The invention relates to a method for separating an n-propyl formate-n-propyl alcohol-water mixture by liquid-liquid phase separation coupling extractive distillation, which comprises the following steps of: dividing a raw material into a water phase and an organic phase by using a phase splitter based on the heterogeneous characteristic of an azeotropic system, and carrying out four-tower operation on a rectifying tower (C1), a rectifying tower (C2), a rectifying tower (C3) and a rectifying tower (C4) to obtain an n-propyl formate-n-propyl alcohol-water mixture. The efficient separation of the n-propyl formate-n-propyl alcohol-water mixture is realized. After separation, the molar fraction of n-propyl formate is greater than 99.99%, the molar fraction of n-propyl alcohol is greater than 99.99%, and the molar fraction of water is greater than 99.99%. The method provided by the invention realizes high-efficiency and low-energy-consumption separation of the n-propyl formate-n-propanol-water azeotropic mixture, and has economic benefits and environmental friendliness.

The invention belongs to the technical field of refrigerants, and particularly relates to a near-azeotropic R410A low-GWP substitute refrigerant as well as a preparation method and application of the near-azeotropic R410A low-GWP substitute refrigerant. The alternative refrigerant is a near-azeotropic mixture and is prepared from the following components in parts by weight: 60 to 70 parts of difluoromethane (R32), 25 to 35 parts of pentafluoroethane (R125) and 3 to 7 parts of hexafluoropropylene (R1216). The refrigerant disclosed by the invention has the characteristics of good environmental protection property, high refrigerating capacity per unit volume, small temperature slippage and excellent thermodynamic property, and is particularly suitable for direct replacement of a refrigerating system, and the existing equipment does not need to be transformed.

To provide an azeotropic mixture and a method for reducing 2333 - trifluoropropyne (TFPY) which is an impurity in the production of 333 - tetrafluoropropene (HFO - 1234yf).SOLUTION: A heterogeneous azeotrope or azeotrope-like composition comprising TFPY and hydrogen fluoride (HF), wherein the composition may comprise from about 71. 5wt.% to about 98. 8wt.% TFPY and from about 1. 2wt.% to about 28. 5wt.% hydrogen fluoride, and wherein the composition has a boiling point from about - 10.0 °C. to about 25.0 °C. at a pressure from about 61psia to about 171psia. This azeotrope or azeotrope-like composition can be used to separate TFPY as an impurity from 2-chloro - 333 - trifluoropropene (1233xf), 2-chloro - 1112 - tetrafluoropropane (HCFC - 244bb), or HFO - 1234yf compositions.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of refrigerants, and particularly relates to a low-GWP alternative refrigerant for R410A as well as a preparation method and application of the low-GWP alternative refrigerant. The alternative refrigerant is a near azeotropic mixture and comprises the following components in parts by weight: 25 to 35 parts of difluoromethane (R32), 35 to 55 parts of 1, 1, 1, 2, 2-pentafluoroethane (R125) and 20 to 30 parts of 1, 1, 2-trifluoroethylene (R1123). The refrigerant disclosed by the invention has the characteristics of good environmental protection property, high refrigerating capacity per unit volume, small temperature slippage and excellent thermodynamic property, and is particularly suitable for directly replacing an air conditioning system without modifying existing equipment.

A process for separating an azeotropic mixture comprising exactly one distillation unit is proposed, wherein the azeotropic mixture comprises a first component and a second component, wherein the first and the second component form a first positive azeotrope, wherein the first positive azeotrope is heterogeneous or homogeneous, wherein the distillation unit comprises a vertical distillation column, a first inlet for receiving a first feed comprising the first component and the second component, a first outlet for discharging a first product, a second outlet for discharging a second product, and a third outlet for discharging the azeotropic mixture, wherein the distillation column further comprises an essentially vertically arranged, impermeable division wall arranged within the distillation column, characterized in that the division wall is arranged at and connected to the bottom of the distillation column such that it provides three sections within the distillation column, wherein a first section and a second section are arranged horizontally adjacent to each other and divided by the division wall, wherein a third section is located vertically above the first and the second section and above the division wall. The invention additionally proposes a device for separating an azeotropic mixture comprising exactly one distillation unit.

Processes for separating an azeotropic mixture are provided. In an embodiment, such a process comprises exposing an azeotropic mixture comprising a first (hydro)fluorocarbon and a second (hydro)fluorocarbon to an ionic liquid comprising a cation and a non-fluorinated anion at a temperature and a pressure at which the ionic liquid absorbs more of one of the first and second (hydro)fluorocarbons than another of the first and second (hydro)fluorocarbons as determined on a mass basis to form a (hydro)fluorocarbon-containing ionic liquid and a processed azeotropic mixture.

The invention belongs to the technical field of solid refined product preparation, and particularly relates to a preparation method of a solid refined product. The alcohol buffer solution is added into the filtering cavity in advance, on one hand, full coating of alcohol molecules on the surface of a solid is promoted through the dilution effect of the alcohol buffer solution on a solid-liquid mixture, and the solid forms a loose structure so as to improve the subsequent treatment efficiency; on the other hand, by means of the buffering effect of the alcohol buffer solution, blockage caused by the fact that solid particles are directly attached to the surface of the sintered filter screen can be effectively reduced, and the continuity of the filtering process is guaranteed. Furthermore, by screening the matched alcohol solvent and solid material, the selected alcohol not only can be tightly adsorbed on the solid surface through intermolecular force and replace water molecules on the surface to form a stable coating layer, but also can form an azeotropic mixture with the lowest azeotropic point with water, so that the system can realize high-efficiency removal of the solvent at a lower temperature; and finally, the residual quantity of water and ethanol in the solid refined product is obviously reduced.

The invention belongs to the technical field of refrigerants, and particularly relates to a low-GWP refrigerant capable of replacing R410A as well as a preparation method and application of the low-GWP refrigerant. The alternative refrigerant is a near-azeotropic mixture and comprises the following components in parts by weight: 55 to 65 parts of difluoromethane (R32), 30 to 40 parts of 1, 1, 1, 2, 2-pentafluoroethane (R125) and 1 to 10 parts of n-butane (R600). Compared with R410A, the refrigerant disclosed by the invention has the advantages that the GWP value is obviously reduced, the slippage temperature of the refrigerant is lower, the environmental protection property is obviously improved, the refrigeration performance is excellent, and the thermodynamic property matching is good.

The invention belongs to the technical field of refrigerants, and particularly relates to an R410A low-GWP substitute refrigerant as well as a preparation method and application of the R410A low-GWP substitute refrigerant. The alternative refrigerant is a near-azeotropic mixture and is prepared from the following components in parts by weight: 85 to 95 parts of difluoromethane (R32), 3 to 7 parts of trifluoroethylene (R1123) and 3 to 7 parts of hexafluoropropylene (R1216). The refrigerant disclosed by the invention has the characteristics of good environmental protection property, high refrigerating capacity per unit volume, small temperature slippage and excellent thermodynamic property, and is particularly suitable for direct replacement of a refrigerating system, and the existing equipment does not need to be transformed.