CN1051387A - 1,1-two chloro-1, the ternary azeotropic compositions of 2-C2H4F2 C2H4F2 and anti--1,2-dichloroethene and methyl alcohol, ethanol or Virahol - Google Patents

1,1-two chloro-1, the ternary azeotropic compositions of 2-C2H4F2 C2H4F2 and anti--1,2-dichloroethene and methyl alcohol, ethanol or Virahol Download PDF

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CN1051387A
CN1051387A CN90108980A CN90108980A CN1051387A CN 1051387 A CN1051387 A CN 1051387A CN 90108980 A CN90108980 A CN 90108980A CN 90108980 A CN90108980 A CN 90108980A CN 1051387 A CN1051387 A CN 1051387A
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mixture
c2h4f2
weight
chloro
dichloroethene
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阿比德·纳扎拉里·麦钱特
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EIDP Inc
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EI Du Pont de Nemours and Co
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
    • C23G5/028—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons
    • C23G5/02809—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons containing chlorine and fluorine
    • C23G5/02825—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons containing chlorine and fluorine containing hydrogen
    • C23G5/02829—Ethanes
    • C23G5/02835—C2H2Cl2F2
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5036—Azeotropic mixtures containing halogenated solvents
    • C11D7/5068—Mixtures of halogenated and non-halogenated solvents
    • C11D7/5077—Mixtures of only oxygen-containing solvents
    • C11D7/5081—Mixtures of only oxygen-containing solvents the oxygen-containing solvents being alcohols only

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Detergent Compositions (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The present invention relates to 1,1-two chloro-1, the azeotropic mixture of 2-C2H4F2 C2H4F2 (HCFC-132C) and anti--1,2-dichloroethene (T-CFC-1130) and methyl alcohol or ethanol or Virahol, this azeotropic mixture is used for the operation of solvent cleaning.

Description

1,1-two chloro-1, the ternary azeotropic compositions of 2-C2H4F2 C2H4F2 and anti--1,2-dichloroethene and methyl alcohol, ethanol or Virahol
Along with the modem electronic circuitry plate develops towards the direction of circuit and component density increase gradually, the thorough cleaning of welding back circuit card becomes a more importantly standard.The modern industry method that electronic component is welded on the circuit card comprises the entire circuit side of using the flux coating plate, and the plate that makes coated with flux then is by preheater and through the fused scolder.Solder flux has cleaned the metal part of conduction and has promoted the roasting of scolder to close.Usually the solder flux of usefulness generally comprises rosin, and it can use separately or use with activating additive such as amine hydrochlorate or oxalic acid derivative.
After the welding, make a part of rosin decomposes, with organic solvent the flux residue on the circuit card is removed usually.The requirement of this kind solvent is strict.The deflux solvent should have following characteristic: lower boiling, and nonflammable, and have hypotoxicity and high-solvency, and so that remove deflux and flux residue, and harmless to the substrate that is cleaned.
Although boiling point, inflammableness and dissolving power characteristic can be regulated by the preparation solvent mixture, these mixtures are usually unsatisfactory, because their fractionating degree does not reach the needs of use.In the solvent still-process, this kind solvent mixture also can fractionation, and in fact this just make that the recovered solvent mixture can not have original composition.
On the other hand, have been found that the azeotropic mixture application in these areas with constant boiling point and constant composition is very effective.Azeotropic mixture has maximum or minimum boiling point, and their not fractionation when boiling.When using these solvent mixtures when printed circuit board removes deflux and flux residue, these characteristics also are important.If mixture is not an azeotropic, more volatile solvent mixture component is evaporation earlier, this will make mixture change composition simultaneously, and have little desirable solubility property, as lower rosin flux dissolving power and for the lower inertia that is cleaned electronic component.Also need this azeotropic characteristic in the operation of vapour removal greasy dirt, wherein the solvent of rerunning generally is used to last cleaning washing.
In a word, steam deflux and degreasing system play a distiller.Remove non-solvent mixture and have the constant boiling point, be single material or be azeotrope, otherwise fractionation will take place, and produce undesirable solvent distribution, this has influenced the safety and the effectiveness of cleaning operation nocuously.
Had been found that many halocarbons based on azeotropic mixture, they can be used as the solvent that removes deflux and flux residue from printed circuit board in some cases, and they also can be used as the solvent of various degreasing operations.For example: United States Patent (USP) 3,903,009 discloses 1,1,2-three chloro-1,2, the ternary azeotrope of 2-Halothane and ethanol and Nitromethane 99Min.; United States Patent (USP) 2,999,815 disclose 1,1,2-three chloro-1,2, the binary azeotrope of 2-Halothane and acetone; United States Patent (USP) 2,999,816 disclose 1,1,2-three chloro-1,2, the binary azeotrope of 2-Halothane and methyl alcohol; United States Patent (USP) 4,767,561 disclose 1,1,2-three chloro-1,2, the ternary azeotrope of 2-Halothane, methyl alcohol and 1,2-dichloroethene.
Modern times are used to clean and some chlorofluorocarbons of other application connects with the minimizing of the ozonosphere of the earth in theory.Just know as far back as middle nineteen seventies, hydrogen is introduced the chemical stability that has reduced these compounds in the chemical structure of complete halogenated chlorofluorocarbon in advance.Therefore, expect that the compound of these loss of stability can just can decompose in lower atmospheric layer, and can not reach unspoiled stratospheric ozonosphere.Therefore, what is also needed is, reduce the chlorofluorocarbon of replacement in theory for ozone with low possibility.
Regrettably, as recognizing this area, formation that can not the prediction azeotrope.This fact obviously makes the research of the new azeotropic mixture that is applied to this area become complicated.However, still constantly making great efforts so that find new azeotropic mixture in this area, they have required dissolving power characteristic, and have stronger versatility aspect dissolving power especially.
According to the present invention, azeotropic mixture is found, and they comprise 1 of significant quantity, 1-two chloro-1, and the 2-C2H4F2 C2H4F2 adds the mixture that is selected from a class alcohol of being made up of methyl alcohol, ethanol and Virahol with anti--1,2-dichloroethene
More particularly, azeotropic mixture is: 1 of about 51～61% weight, 1-two chloro-1, the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2 and about 31～41% weight and the methanol mixture of about 4-10% weight; 1 of about 65～75% weight, 1-two chloro-1, the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2 and about 19-29% weight and the alcoholic acid mixture of about 3-7% weight; 1 of about 61-71% weight, 1-two chloro-1, the mixture of the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2 and about 27～37% weight and the Virahol of about 0.7～1.7% weight.
The invention provides the nonflammable azeotropic mixture that is suitable for fully as the solvent cleaning operation.
Mixture of the present invention comprises 1 of significant quantity, 1-two chloro-1,2-C2H4F2 C2H4F2 (CFCL 2CH 2F, boiling point=48.4 ℃) with anti--1,2-dichloroethene (boiling point=48 ℃) and be selected from by methyl alcohol (CH 3OH, boiling point=64.6 ℃) or ethanol (CH 3CH 2OH, boiling point=78 ℃) or Virahol (CH 3CHOHCH 3, boiling point=82 ℃) and the mixture of the class alcohol formed to be to form azeotropic mixture.In the customary nomenclature of halocarbon field, above-mentioned halogenation material is called HCFC-132C and T-HCC-1130.
So-called azeotropic mixture refers to the azeotropic liquid mixture of three kinds or multiple material, the mixture of these materials is equivalent to an one matter, because the steam that part is evaporated or distillation is produced by liquid has form substantially the same with liquid, i.e. there is not the change of forming during mixture evaporation substantially.Can be known as the azeotropic constant boiling mixture and compare, have or maximum or minimum boiling point with the zeotrope of same substance.
For purposes of the invention, the definition of significant quantity is meant the amount of each component of mixture of the present invention, when these components are mixed, will cause forming azeotropic mixture of the present invention.The amount of each component that this definition is included can change along with putting on the pressure on this mixture, as long as azeotropic mixture exists under different pressure, but they have the different boiling point of possibility.Therefore, significant quantity comprises the weight percentage of each component of each mixture of the present invention, in pressurization or under atmospheric pressure their form azeotropic mixture.
Term " a kind of azeotropic mixture basically by-form " does not also mean that to get rid of and is doped with a small amount of other materials that these materials can not change the azeotropic characteristic of this mixture significantly.
In fact, can represent the characteristic of constant boiling mixture by any one of following several criterions, this mixture can present many outward appearances, and this depends on selected condition:
* this mixture can be defined as A, the azeotrope of B and C because just " azeotrope " this notion be simultaneously definition be again to limit, and it requires the A of significant quantity, B and C form the mixture of this unique material, this mixture is a constant boiling mixture.
* those skilled in the art know, and the composition of given azeotrope will change-at least slightly change under different pressure, and the variation of pressure also can change-at least slightly change boiling temperature.Therefore, A, the azeotrope of B and C is represented a kind of relation of unique type, but has variable composition, and this depends on temperature and/or pressure.Therefore, usually form and define azeotrope with scope of forming rather than fixed.
* this mixture can be defined as A, specific weight percentage relation or the molecular fraction relation of B and C, yet will be appreciated that, these concrete numerical value have only been pointed out a kind of specific such relation, and in fact, by A, the represented a series of this relation of B and C in fact only just exists for given azeotrope, and the influence that is stressed and changing.
* represent azeotrope A, the feature of B and C is by this mixture being defined as the azeotrope that is characterised in that the boiling point under the setting pressure, therefore provided distinguishing characteristics, mixture by concrete quantitaes very suitably defines scope of the present invention, the mixture of this concrete quantitaes is subjected to the restriction of used analytical instrument, and can only be identical with used analytical instrument precision.
1 of about 51～61% weight, 1-two chloro-1, the tertiary mixture of the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2 and about 31～41% weight and the methyl alcohol of about 4～10% weight is called azeotropic mixture, because the mixture in this scope has the boiling point of substantially constant under constant voltage.Because the boiling point with substantially constant is not so fractionation often takes place in this mixture basically in evaporative process.After the evaporation, only there is little difference between the composition of steam and the composition of initial liquid phase.This species diversity is so little, so that can think that the composition of steam and liquid phase is substantially the same.Therefore, any mixture in this scope all has the peculiar characteristic of ideal ternary azeotrope.In the accuracy rating of fractionating method, formed by 1 of about 56.5% weight, 1-two chloro-1, anti--1 of 2-C2H4F2 C2H4F2, about 36.5% weight, the tertiary mixture that the methyl alcohol of 2-Ethylene Dichloride and about 7.0% weight is formed, as the ideal ternary azeotrope, it is being about 41.0 ℃ for its boiling point under the normal atmosphere substantially.
Similarly, according to the present invention, 1 of about 65-75% weight, 1-two chloro-1, anti--1 of 2-C2H4F2 C2H4F2, about 19-29% weight, the alcoholic acid tertiary mixture of 2-Ethylene Dichloride and about 3～7% weight is called azeotropic mixture, because the mixture in this scope has the boiling point of substantially constant under constant voltage.Because the boiling point with substantially constant is not so fractionation often takes place in this mixture basically in evaporative process.After the evaporation, only there is little difference between the composition of steam and the composition of initial liquid phase.This species diversity is so little, so that can think that the composition of steam and liquid phase is substantially the same.Therefore, any mixture in this scope all has the peculiar characteristic of ideal ternary azeotrope.In the accuracy rating of fractionating method, formed by 1 of about 70.0% weight, 1-two chloro-1, anti--1 of 2-C2H4F2 C2H4F2, about 24.6% weight, the tertiary mixture that the ethanol of 2-Ethylene Dichloride and about 5.4% weight is formed, as the ideal ternary azeotrope, it is being about 44.5 ℃ for its boiling point under the normal atmosphere substantially.
Similarly, according to the present invention, 1 of about 61～71 weight, 1-two chloro-1, anti--1 of 2-C2H4F2 C2H4F2, about 27～37% weight, the tertiary mixture of the Virahol of 2-Ethylene Dichloride and about 0.7～1.7% weight is called azeotropic mixture, because the mixture in this scope has the boiling point of substantially constant under constant voltage.Because the boiling point with substantially constant is not so fractionation often takes place in this mixture basically in evaporative process.After the evaporation, only there is little difference between the composition of steam and the composition of initial liquid phase.This species diversity is so little, so that can think that the composition of steam and liquid phase is substantially the same.Therefore, any mixture in this scope all has the peculiar characteristic of ideal ternary azeotrope.In the accuracy rating of fractionating method, formed by 1 of about 66.3% weight, 1-two chloro-1, anti--1 of 2-C2H4F2 C2H4F2, about 32.5% weight, the tertiary mixture that the Virahol of 2-Ethylene Dichloride and about 1.2% weight is formed, as the ideal ternary azeotrope, it is being about 46.5 ℃ for its boiling point under the normal atmosphere substantially.
Minimizing has low possibility to above-mentioned azeotrope for ozone, and wishes their almost completely decomposition before reaching stratosphere.
Azeotropic mixture of the present invention enables to reclaim easily and re-use solvent from steam deflux and degreasing operation because of its azeotropic characteristic.For example, azeotropic mixture of the present invention can be used for as United States Patent (USP) 3,881, and in the purging method described in 949, this patent is hereby incorporated by.
Azeotropic mixture of the present invention can be by any easy method preparation, and this method comprises mixes the amount of required component.Preferable methods is the amount that weighs up required component, in a suitable container they is mixed then.
Embodiment
Embodiment 1
Preparation contains 1 of 61.7% weight in a suitable container, 1-two chloro-1, and the solution of the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2,31.8% weight and the methyl alcohol of 6.5% weight, and make its thorough mixing.
This solution is revolved distillation in the band distillation tower (the fractionation abilities of 200 blocks of column plates) in PerKin-Elmer Model 251 type automatic annular, with about 10: 1 backflow/taking-up ratio.Tower top temperature is directly shown reading to 0.1 ℃.All temperature all are calibrated to 760mm pressure.With the composition of gas Chromatographic Determination distillate, the result is summarized in the table 1 with gained.
Table 1
Distillation (61.7+31.8+6.5)
1,1-two chloro-1,2-C2H4F2 C2H4F2 (DCDFE),
Instead-1,2-dichloroethene (T-DCE) and methyl alcohol (MEOH)
Distillation of fraction cat head temperature or time DCDFE T-DCE MEOH
Degree, the weight % of ℃ receipts
1 41.1 2.6 57.1 35.7 7.2
2 41.0 10.3 56.1 36.9 7.0
3 41.1 15.0 56.1 36.8 7.1
4 41.1 20.0 56.5 36.5 7.0
5 41.1 22.0 56.6 36.4 7.0
6 41.1 25.0 56.8 36.3 6.9
7 41.1 30.0 56.9 36.2 6.9
Tailing-79.8 63.4 29.5 7.1
Top data analysis shows, when distillation is carried out, only has little difference between the tower top temperature and between the distillate composition.To the statistical results show of data, 1,1-two chloro-1, the ideal ternary azeotrope of 2-C2H4F2 C2H4F2, anti--1,2-dichloroethene and methyl alcohol has following properties (99% confidence limit) under barometric point:
1,1-two chloro-1,2-C2H4F2 C2H4F2=56.5 ± 1.3 wt.%
Instead-1,2-dichloroethene=36.5 ± 1.1 wt.%
Methyl alcohol=7.0 ± 0.3 wt.%
Boiling point ℃=41.0 ± 0.1
Embodiment 2
Preparation contains 1 of 76.3% weight in a suitable container, 1-two chloro-1, and the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2,16.8% weight and the alcoholic acid solution of 6.9% weight, and make its thorough mixing.
This solution is revolved distillation in the band distillation tower (the fractionation abilities of 200 blocks of column plates) in Perkin-Elmer Model 251 type automatic annular, with about 10: 1 backflow/taking-up ratio.Tower top temperature is directly shown reading to 0.1 ℃.All temperature all are calibrated to 760mm pressure.With the composition of gas Chromatographic Determination distillate, the result is summarized in the table 2 with gained.
Table 2
Distillation (76.3+16.8+6.9)
1,1-two chloro-1,2-C2H4F2 C2H4F2 (DCDFE),
Instead-1,2-dichloroethene (T-DCE) and ethanol (ETOH)
Distillation of fraction cat head temperature or time DCDFE T-DCE ETOH
Degree, the weight % of ℃ receipts
1 44.5 5.0 70.0 24.6 5.4
2 44.5 9.8 69.6 25.0 5.4
3 44.5 14.6 69.8 24.9 5.3
4 44.5 20.0 69.7 24.8 5.5
5 44.5 24.4 70.2 24.5 5.3
6 44.5 28.6 70.8 23.8 5.4
7 50.0 32.9 72.4 22.4 5.2
Tailing-93.5 86.2 5.6 8.2
Top data analysis shows, when distillation is carried out, only has little difference between the tower top temperature and between the distillate composition.To the statistical results show of data, 1,1-two chloro-1,2-C2H4F2 C2H4F2, anti--1,2-dichloroethene and alcoholic acid ideal ternary azeotrope have following properties (99% confidence limit) under barometric point:
1,1-two chloro-1,2-C2H4F2 C2H4F2=70.0 ± 1.9 wt.%
Instead-1,2-dichloroethene=24.6 ± 1.9 wt.%
Ethanol=5.4 ± 0.3 wt.%
Boiling point ℃=44.5 ± 0.1
Embodiment 3
Configuration contains 1 of 64.6% weight in a suitable container, 1-two chloro-1, and the solution of the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2,30.0% weight and the Virahol of 5.4% weight, and make its thorough mixing.
This solution is revolved distillation in the band distillation tower (the fractionation abilities of 200 blocks of column plates) in Perkin-Elmer Model 251 type automatic annular, with about 10: 1 backflow/taking-up ratio.Tower top temperature is directly shown reading to 0.1 ℃.All temperature all are calibrated to 760mm pressure.With the composition of gas Chromatographic Determination distillate, the result is summarized in the table 3 with gained.
Table 3
Distillation (64.6+30.0+5.4)
1,1-two chloro-1,2-C2H4F2 C2H4F2 (DCDFE),
Instead-1,2-dichloroethene (T-DCE) and Virahol (IPROH)
Distillation of fraction cat head temperature or time DCDFE T-DCE IPROH
Degree, the weight % of ℃ receipts
1 45.9 14.7 64.6 34.4 1.0
2 46.4 29.8 65.8 32.9 1.3
3 46.4 41.6 65.9 32.9 1.2
4 46.3 65.2 66.8 31.9 1.3
5 46.7 72.8 66.5 32.4 1.1
6 46.9 87.6 69.3 29.3 1.4
Tailing 100.0 63.8 12.4 23.8
Top data analysis shows, when distillation is carried out, only has little difference between the tower top temperature and between the distillate composition.To the statistical results show of data, 1,1-two chloro-1, the ideal ternary azeotrope of 2-C2H4F2 C2H4F2, anti--1,2-dichloroethene and Virahol has following properties (99% confidence limit) under barometric point:
1,1-two chloro-1,2-C2H4F2 C2H4F2=66.3 ± 2.2 wt.%
Instead-1,2-dichloroethene=32.5 ± 2.2 wt.%
Virahol=1.2 ± 0.3 wt.%
Boiling point, ℃=46.5 ± 0.8
Embodiment 4
With several single face circuit cards of activation rosin flux coating, with circuit card by preheater so that on it surface temperature reach about 200 °F (93 ℃), the fusion welding through 500 (260 ℃) makes circuit card soldered then.With top embodiment 1, three kinds of cited in 2 and 3 azeotropic mixtures carry out the deflux processing to the circuit card of welding respectively, promptly at first circuit card was suspended in the boiling groove that contains this azeotropic mixture three minutes, and then be suspended in the rinse bath that contains same azeotropic mixture one minute, be suspended at last in the above-mentioned boiling groove solvent vapo(u)r one minute.All there is not the visible resistates on the circuit card with every kind of azeotropic mixture cleaning.

Claims (13)

1, a kind of azeotropic mixture, this mixture comprises 1 of significant quantity, 1-two chloro-1, the 2-C2H4F2 C2H4F2 adds and is selected from a class alcohol of being made up of methyl alcohol, ethanol and Virahol with anti--1,2-dichloroethene.
2, the azeotropic mixture of claim 1, this mixture are gone up substantially by 1 of about 51-61% weight, 1-two chloro-1,2-C2H4F2 C2H4F2, about 31-41% weight anti--1, the methyl alcohol composition of 2-difluoroethylene and about 4-10% weight.
3, the azeotropic mixture of claim 1, this mixture are gone up substantially by 1 of about 65%-75% weight, 1-two chloro-1, and the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2 and about 19-29% weight and the ethanol of about 3-7% weight are formed.
4, the azeotropic mixture of claim 1, this mixture are gone up substantially by 1 of about 61-71% weight, 1-two chloro-1, and the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2 and about 27-37% weight and the Virahol of about 0.7-1.7% weight are formed.
5, the azeotropic mixture of claim 2, this mixture are gone up substantially by 1 of about 56.5% weight, 1-two chloro-1, and the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2 and about 36.5% weight and the methyl alcohol of about 7.0% weight are formed.
6, the azeotropic mixture of claim 2, wherein this mixture has about 41.0 ℃ boiling point being essentially under the normal atmosphere.
7, the azeotropic mixture of claim 3, this mixture are gone up substantially by 1 of about 70.0% weight, 1-two chloro-1, and the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2 and about 24.6% weight and the ethanol of about 5.4% weight are formed.
8, the azeotropic mixture of claim 3, wherein this mixture has about 44.5 ℃ boiling point being essentially under the barometric point.
9, the azeotropic mixture of claim 4, this mixture are gone up substantially by 1 of about 66.3% weight, 1-two chloro-1, and the anti--1,2-dichloroethene of 2-C2H4F2 C2H4F2 and about 32.5% weight and the Virahol of about 1.2% weight are formed.
10, the azeotropic mixture of claim 4, wherein this mixture has about 46.5 ℃ boiling point being essentially under the barometric point.
11, a kind of method of cleaning solid surface, this method comprises with the azeotropic mixture of claim 1 handles said surface.
12, the method for claim 11, the printed circuit board of wherein said solid surface for staiing with solder flux and flux residue.
13, the method for claim 12, wherein said solid surface is a metal.
CN90108980A 1989-10-04 1990-10-04 1,1-two chloro-1, the ternary azeotropic compositions of 2-C2H4F2 C2H4F2 and anti--1,2-dichloroethene and methyl alcohol, ethanol or Virahol Pending CN1051387A (en)

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US41765589A 1989-10-04 1989-10-04
US417,655 1989-10-04

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CN1051387A true CN1051387A (en) 1991-05-15

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US4877545A (en) * 1988-12-29 1989-10-31 E. I. Du Pont De Nemours And Company Azeotropic compositions of 1,1,2-trichlorotrifluoroethane and trans-1,2-dichloroethylene with ethanol, N-propanol, isopropanol and acetone or with ethanol or acetone and nitromethane

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