TW219950B - - Google Patents

Description

A6 _B6_ printed by R Industry and Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of the invention (1) Background of the invention The present invention relates to a mixture of fluorinated hydrocarbons and aliphatic hydrocarbons, more specifically and essentially constant The boiling point of dicyanomethane and propane sister compound is unkind. Concerned that the ozone depletion potential of certain halogenated groups has led to the study of alternative compounds with lower ozone depletion potential. The long-term environmental effects of fluorocarbons have recently been carefully studied in substantive science because it was assumed that these materials would Decomposition in the stratosphere, it will release chlorine atoms under the influence of ultraviolet medium radiation. Atmospheric atoms theoretically undergo chemical reactions at the same temperature, which can consume the ozone layer of the same temperature, and the substantial reduction of the oxygen in the stratosphere has a serious adverse impact on the quality of life of the earth. There is a limit to the amount of fluorinated hydrocarbons. This substance may be a material that does not harm the environment. However, if the required sticking properties can be found in the given mixture, it may be possible to use known materials. mixing. However, simple mixtures pose problems in the design and operation of refrigeration and other equipment because the ingredients are carried out in steam and liquid phase. In order to avoid excessive component separation problems, it is especially necessary to find a constant boiling point mixture without component separation problems. Unfortunately, it is not possible to predict azeotropic mixtures or prescriptions like azeotropic mixtures, which complicates the study of the composition with the desired mixing properties. The action is similar to that of a single compound, and when boiling, it will cause insignificant mixture separation and the constant boiling point combination on the substrate is now urgently needed. (Please read the precautions on the back before writing this page.) This paper is also used in the Central Park National Standard (CNS) A 4 specifications (210 X 297 male cage) 81.9.25,000 219950 Λβ Βί; Central Bureau of Standards S of the Ministry of Economic Affairs Industrial and consumer cooperatives printed «V. Description of the invention (2) Summary of the invention t The present invention is directed to a substantially constant boiling point compound • It includes (3) difluoromethane and propane, wherein the above compound contains about 67 to 90 weight Percentage · Preferably it is about 75% by weight of difluoromethane (HFC-32) · This is based on the weight and sum of < b). The difference is about 10 to 33% by weight for propane (HC-290) , Preferably 25 to weight percent. In particular, the preferred azeotropic mixture includes about 70% by weight of difluoromethane and 3Q by weight of propane, wherein the weight percentage is calculated based on the weight of the difluoromethane and propane. The sister component of the present invention has a higher vapor pressure than its two components. If used in the present invention, a substantially constant boiling point compound means that after half of the most mixture has been allowed to evaporate, its initial vapor pressure at 251C will not change by 10¾ M. Therefore, it is described here that resistance to component separation will seriously reduce their utility in the intended application. These substantially constant boiling point fluorocarbon-containing sisters are particularly effective as fluids suitable for power cycling, such as freezing, heat transfer media, aerosol propellants, gas dielectrics, fire extinguishing agents, and polymer expansion agents. Said there are polyolefins and polyurethanes. Detailed description of the preferred elegant example The fluorinated hydrocarbon component used in the sister compound of the present invention is methane gas, which is called H FC-32 in the halogenated carbon industry; used in the sister compound The second component is saturated aliphatic hydrocarbon propane. ---------; ------- ~ -------- outfit II ----. 玎 ---- I marry, clear '1: ^-! Harsh * Of; 1 * matters Ran «'write this page) This paper once again meets the Chinese family standard (CNS> A 4 specifications (210 X 297 mm) 81.9.20,000 219 & 50

At; Βι :. Printed by the Ministry of Economic Affairs of the Central Standards Residents ’Consumer Cooperatives. 5. Description of the invention (5) In the phase study of various mixtures of difluoromethane and propane, Simeima Chemicals included greatly different difluoromethane and propane. The quantity indicates that at constant temperature, the azeotrope is formed in the temperature range studied. The essence of the present invention is to further determine the boiling point of the further research including the ratio of the majority of Fan Di ’s difluoromethane and propionate, which can resist the composition of the mixture, so that the sister at a constant temperature to maintain a constant boiling point . The use of fluoromethane and propane components in the quantities disclosed unexpectedly described the steaming of the sister compound at a constant temperature of 25 °, even though the initial sister compound 5050 had obtained permission to evaporate at a temperature not exceeding 10XM. The small changes in steam at constant temperature describe the separation and loss of the amount of ingredients that will substantially change the boiling point of the mixture and will not occur, which makes the compound particularly suitable for the intended use, such as frozen clams, aerosol propellants, foaming Agent. In addition, studies have pointed out that the novel substantially constant boiling point composition of the present invention exhibits a low point and a bubble point with a small pressure difference. As a well-known method in the craftsmanship, the difference between the dew point and the bubble pressure at the same temperature is the constant boiling point of a mixture or the azeotropic mixture-like behavior, and should be known to those azeotropic sisters. In comparison • The pressure difference exhibited by the substantially constant boiling point compound of the present invention is very small. The sister compound of the present invention further expresses characteristics in this way. At constant temperature, the difference between the pressure corresponding to the bubble point and the pressure corresponding to the dew point of the mixture must not be greater than about 10 psia (10 psi). As a well-recognized method in this technical field, there is a sister range that includes the same ingredients as the real azeotrope. It not only exhibits properties that are almost exactly equivalent to the real azeotrope to be used for freezing or Others ----------------------- installed- -----. 玎 ---- ~ · M. (-^-Contrary note -事 ^ Ranchang wrote this page). This paper is again applicable to the Chinese National Standard (CNS> A4 specifications (210 X 297 male cage) 81.9.20,000 _ _ ~ / · * ·. Ff " rf ~ ·. Ministry of Economic Affairs Printed by KK Industrial and Consumer Cooperative of Central Bureau of Standards

Afi __ B <; Fifth, the description of the invention (4) is applied, but it will also show the true azeotropic mixture at other temperatures and pressures with a fixed boiling point and the characteristics and tendency of the male component to be separated when it is not boiling. Completely equivalent in nature. Other fluorocarbons can also be added to the constant boiling point mixture of HFC-32 and propane without changing the sister compound's almost completely azeotropic mixture properties. Representative fluorocarbon compounds can be added to the constant boiling boiling compounds of the present invention, including chlorodifluoromethane (HCFC-22), pentafluoroethane < HFC-1 2 5), perfluoropropane (F 0 * 2 1 8), 1, 1, 2, 2-tetrafluoroethane (HCF-134), 1 atmosphere-1.1, 2, 2, 2-tetrafluoroethane (HCFC-124), 1 , 1,1,2,3,3 · 3-heptafluoropropane (HFC-227ea), 1,1,1,2,2,3,3-heptafluoropropane (HFC-227ca), 1, 1, 1, 1_trifluoroethane Alkane (HFC-143a), trifluoroethane (HFC-23), 1,1-difluoroethane (HFC-152a) and fluoroethane (HFC-161). Additives are often added to the fluorocarbon compound of the present invention, including lubricants, putrefaction inhibitors, stabilizers and dyes. In addition to freezing applications, the novel constant boiling point compound of the present invention is also very effective as an aerosol propellant, heat transfer medium, gas dielectric, fire extinguishing agent, polymer expansion agent, such as polyolefin and polyurethane For esters, Μ and used as power cycle are suitable for flow gambling. The sisters described here can provide freezing by condensing a constant boiling sister compound and subsequently evaporating this composition. For example, condensing the portion adjacent to the object to be cooled. In addition, these sister compounds can be used to provide thermal suspension, for example, and this, in the heat pump • by evaporating the adjacent combination of the heated body and then condensing constant ------------- ------------ 装 ——----. 玎 ---- 1 0 (^ t: K, ._ T Note on the back of the page and then fill out this page). This paper is again Applicable to the Chinese National Standard (CNS) A 4 Dange (210 X 297 mm) 81.9.20,000 210950 A 6 B (; 5. Description of the invention (5) f 飧 " '" •:'-,! * The matter will be written in 1) The sister compound with a fixed boiling point. The application of the substantially constant boiling point compound of the present invention eliminates the problem of component separation in the operation of the system, because these compounds essentially act like a single substance. Compared with the refrigerant 502 having an ozone depletion potential of 0.25, the composition of the present invention has zero ozone depletion potential. , Example 1 * Phase-exemption was performed on the mixture of difluoromethane and propane, where the sister compound was changed, and the steam pressure was measured at a constant temperature of 15.310. A sister compound of an azeotropic compound was obtained, as evidenced by the observed maximum steam®, and confirmed as follows: difluoromethane = approximately 70 weight percent propane = approximately 30 weight percent vapor pressure = approximately at -15.3Ό A phase study conducted at 4832 Torr at other temperatures indicated that the azeotrope changes are as follows: Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (a) Difluoromethane = approximately 72 weight percent propane = approximately 28 weight percent vapor pressure = at 251C When the time is about 15997 torr (b) difluoromethane = about 74% by weight 7 This paper is again applicable to the Chinese National Standard (CNS) A 4 specifications (210 X 297 mm) 81.9.20,000 2199o〇Λ 6 __BG _ V. Invention Description (6) Propane = about 2S weight percent vapor pressure = about 2 8 9 5 4 Torr at 50 (α difluoromethane = about S8 weight percent propane = about 32 weight percent vapor pressure = at -5〇υ Approximately 1216 Torr Example 2 A phase study was conducted on the constant boiling point compound of difluoromethane and propane to prove the lowest splitter IM and the change in vapor pressure and sister temperature during the 251C steam loss. Initial liquid crow (IQ) , The post-liquid (FQ), initial steam (0), final steam (I), steam pressure M and the change of steam pressure from the initial steam pressure should be studied by M in order to determine the steam leakage effect in the sister compound and steam pressure , As shown in Table 1 below -------------- 1 --------- installed ------ 1Τ --- ί 丨 line f ^ tlr- " " 面 >/; i "f; fi 'Ran Cheng wrote this page) Printed by the Ministry of Economy Central Standards Staff Consumer Cooperative 81.9.20,000. 297 mm) 2i9Do〇Λ 6 m V. Description of the invention (7) The total weight of the sample mixture is 200% of the total weight of the fermented material. The vapor pressure of propane i D 55 ia) Variation of vapor pressure (ds 丨 a 100% honey ) IQ 0 70.0 3 0 '0 310.0 0 0 0 72.2 27.8 310.0 0 1 50 71.9 28.1 309.9 0. 03 FQ 50 67.9 32. 1 309.9 0. 03 IQ 0 80.0 20.0 309.3 0 0 0 74.3 25.7 309.3 0 1 50 76.0 24.0 307.0 0. 7 FQ 50 85.1 14.9 307.0 0. 7 IQ 1 0 90.0 10.0 301.5 0 0 0 .78.7 21.3 301.5 0 1 50 89.3 10.7 273. 9 9. 2 FQ 50 97. 4 2. 6 273. 9 9. 2

J --------- installed ------ ordered --- 1 I ^ f ^ t " ··? #Face:; i " The matter is written again W Central Ministry of Economic Affairs S The paper scale printed by the Industrial and Consumer Cooperatives is applicable to the Chinese National Standard (CNS) A4 specifications (210 X 297 mm) 81.9.20,000 219950 V. Description of the invention (8) The data in the table above indicates the mixture of difluoromethane and propane (it Represents the extreme value of the sister compound of the present invention) Only 50 π of the initial mixture evaporated and the maximum vapor change of 9.2X is the constant boiling point on the beast. If the mixture's vapor pressure changes less than 105K after the leakage of 50¾ at a constant temperature of 25 υ, this mixture can be regarded as a constant boiling point on the substrate. * Example 3 The freezing properties of the substantially constant boiling viscosity compound of the present invention for a single compound HCFC-22, refrigerant -502M and pentafluoroethane (HFC-125) are listed in Table 2. (^ '" ^ " Notes on the back' will be written on this page again) — Installed,-έ. • Thread-The Ministry of Economic Affairs, Central Standards Bureau, Employee Consumer Cooperatives prints clothes and paper again applicable to the Chinese standard (CMS) ) A 4 specifications (210 X 2 mm) 10-81.9.20,000 219950

Afi Bfi V. Description of the invention (9) _2 Hah, Qiao Yongyongmu »Propane Ministry of Economic Affairs Central Standards Bureau ®: Industrial and Consumer Cooperatives printed * '1 Yi 32 / Propane pentafluoroethane (percentage fch ingredients H CF Γ -?.? R-5 0 2 HF Γ.-1 2 5 8 0/20 7 0/20 Evaporator temperature T -30 -30 -30 -30 -30 Evaporator pressure (PS ia) 19.6 24.0 26.7 34.7 45.8 Condenser temperature ° F 115 115 115 115 115 Condenser pressure (P s 1 at 258 282 327 420 389 Compressor: 'Release temperature T 303 239 223 337 273 Coefficient of performance 1. 97 1.89 1.69 1.83 2.06 Freezing capacity (B tu / min) 76.6 80.0 79.4 124 151-11-This paper scale is applicable to the national standard (CNS) A 4 specifications (210 X 297 mm) of the country t 81.9.20,000 -------------- -^ -------- 装 ------ # ---- ^ I line (-^-^ face note-leather item and then write this page) ^ 50 V. Invention_ Description (10)

Af; The coefficient of continuity (C · 'It is a measure of the freezing capacity means that it is an azeotropic mixture for the evaporator and the type of frozen encounter alkanes (HFC-125) at a fixed pressure in the evaporator The ratio is higher. HFC-32 and C are the higher capacity of HFC. For the refrigeration cycle of the evaporator and the table, 0. P.) The energy-efficient evaporator is divided by the cold-shrinking condenser and the net freezing effect is listed on the compression. The ratio of the rate-a method. The change in the enthalpy of the medium refrigerant, in other words, the heat removed by the refrigerant. The freezing capacity is the basis. In terms of *, the C · 0. P. Values exemplified by the conditions shown in Table 2 are higher than pentafluoroethane C · Ο * P · values, in addition · HFC-32 and propane R-502 and HCFC-22 The C · 0. P. Value to obtain the azeotrope of alkane has an amount higher than that of HCFC-22, R-502. For condensers, the ability to be replaced by the conditions shown in Table 2 is the most important consideration variable. Example 4 The pressure difference of the present constant boiling point of the present invention is determined by the difference between the charging point pressure of 251 and the bubble point force of 25T: every time it is manufactured, in order to be able to be compared, the ingredients The necessary force difference of the mixture outside the Fan Pu must be given. --------------- One -------- installed -------- ordered (-also:, 4- 'on the back :; 1 read the item Ran 塡This page is printed by the Standards and Loss Bureau of the Ministry of Economic Affairs. This paper is printed in accordance with the Chinese National Standard (CNS) Ψ 4 specifications (210 X 297 mm). 81.9.20,000 Printed by the Staff Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 219950 ΛΓ 丨 Fr, Fifth, the description of the invention (11) ^ _3-The difference in the bubble point of the refrigerant dew point (percentage of weight) (ρ aia) (paia) (paia) Hospital 40 alkyl 35 alkyl 30 A + A + A + fluorine 60 fluorine 60 fluorine 70 / IV iv / fv didioxane 28 alkane 20 alkane 10 alkane 10 alkane 5) alkane 1) A + A + A + A V + A + A + A + F 72 F 80 F 85 F 90 Town 95 Fluorine 99 / IV / IV / IV. / IV / IV 222 212 Propane Propane Propane Propane Propane Propane Propane Propane Propane 269 290. 307.7 38 309.5 19 307.2 310. 307.4 309.2 307.8 309. 309 310. 306 . 277 307.0 301.5 287,6 19 259.2 18-13-This paper scale is applicable to the Chinese National Standard (CNS) A 4 specifications (2i0 X 297 mm) 81.9.20,000 ------------- -^ -------- outfit -------- '玎 ---- 1 -_ 「-“ 0 ^ Two catties :; 1-- matter again Chen wrote on this page) 1219950

An Bf; 5. Description of the invention (12) This result shows that there is only a slight difference in the pressure difference between the black point and the foam point at 251C. This means that this sister compound will not make a significant share • and acts like a single compound with a qualitatively constant boiling point. {-": " Second ::,-'And> /',-• .-Guangxiang Rancheng wrote this page) Printed by the Ministry of Economic Affairs Central Standards Bureau Employee Consumer Cooperative *** Clothes-14-This paper Applicable to China National Standard (CNS) A 4 specifications (210 X 297 Gongyu) 81.9.20,000

Claims (1)

219950 L-a kind of compound with constant boiling point, containing difluoromethane and ⑹propane, wherein the composition contains 90% by weight and the most percentage of difluoromethane, calculated based on the weight of ⑻ and < b > . 2- The sister compound according to item 1 of the patent application model contains difluoromethane from S7 to 75% by weight and propane from 25 to 33% by weight. 3. According to the sister compound of patent application No. 1 in the patent application, it contains difluoromethane by weight and the most weighted propane. The propane has a boiling point of -15.31 at 48 3 2 Torr. , 1-a kind of 'cooling method, including condensate application of the patent compound, the first sister compound, and "after evaporation of the sister compound in the vicinity of the body to be cooled. 5- A method of cooling, which includes condensing the sister compound of patent application item 2 * and then evaporating the aforementioned sister compound in the vicinity of the object to be cooled. & A method of cooling, which includes condensing the sister compound of the third item of the patent application patent picture * and then evaporating the aforementioned sister compound in the vicinity of the object to be cooled. : ...; ............................................................ ..X ......................... ir (please read the notes on the back of the dragon first before reopening this page ) • Color · f 4 (210X297 public broadcasting)