7 results about "Zeotropic mixture" patented technology

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.

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.