Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
  • D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
  • D06L1/02—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents
  • D06L1/04—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using organic solvents combined with specific additives
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C17/00—Preparation of halogenated hydrocarbons
  • C07C17/38—Separation; Purification; Stabilisation; Use of additives
  • C07C17/42—Use of additives, e.g. for stabilisation
• • 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
  • C23G5/02854—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 characterised by the stabilising or corrosion inhibiting additives
  • C23G5/02861—Oxygen-containing compounds
  • C23G5/02877—Ethers

Definitions

• the present invention relates to the stabilization of halogenated aliphatic hydrocarbons saturated in C, to C, and particularly trichloro-l ,1 ,l ethane.
• trioxane it is also known to use trioxane as a stabilizer.
• the interval of stabilization time preceding the appearance 'of acid vapors or of a coloration varies from only minutes to 48 hours, which is insufficient for the prolonged use of trichloro-l,1,l ethane in degreasing or cleaning of metal or other objects.
• the objective of this invention is to remedy the inconvenience cited above by allowing efficient and prolonged stabilization of the aliphatic halogenated hydrocarbons and thus the carrying out of the grease removal and/or cleaning of metal parts, plastics, textile or other materials, without noticing any degradation of the solvent and of the materials to be treated.
• the stabilization of the aliphatic saturated halogenated solvents in C, to C, and particularly of trichloro-l,l,l ethane is accomplished by incorporating therein trioxane associated with an aliphatic alcohol, particularly tertio butanol and/or an epoxide which is liquid at ordinary temperature, particularly butylene oxide.
• trioxane is associated with from 0.1 to 7.5 percent of said aliphatic alcohol and/or from 0.1 to 4 percent of said epoxide.
• the combination is then incorporated into the halogenated solvent.
• thiol such as alkyl orthoformate, alkyl orthoacetate, aliphatic or cyclic acetal, aliphatic organic acid
• imino-ether such as N-alkyl alkoxy-l ethanimine and ketimine such as N- alkyl isopropanimine
• an oxygen containing heterocyclic nucleus such as pyrannic heterocycle and/or a nitrogen containing heterocyclic nucleus such as pyrrolic, pyrrolinic and morpholinic heterocycle
• the aforementioned alkyl groupings have from one to four carbon atoms and the boiling points of the compounds associated with trioxane and used in the stabilization formulas should not differ by more than 50, and preferably by not more than 25 C, from the boiling point of the halogenated saturated aliphatic hydrocarbon in question.
• the foregoing materials may be associated with the trioxane in an amount within the range of 0.1 to 4 percent by weight and preferably in an amount within the range of 0.3 to 2 percent by weight, based upon the solvent composition.
• the following list of compounds may be cited, but this list cannot be considered as limiting: dichloroethanes, trichloroethanes, and particularly trichloro-l, 1,1 ethane, tetrachloroethanes, dichloro-1,2 propane, dichloro-l,2 and -2,3 butanes, tribromo ethanes and dibromo-l ,2-propane.
• the invention relates also to the stabilized compounds comprising one or several halogenated saturated aliphatic hydrocarbons in C, to C,, particularly trichloro-l,l ,1 ethane containing from 0.001 to 15 percent by weight of trioxane associated with 0.1 to 7.5 percent by weight of an aliphatic alcohol, particularly tertio butanol, and/or with 0.1 to 4 percent by weight of an expoxide liquid at ordinary temperature, particularly butylene oxide.
• These compounds may also contain an alkyl nitrile in C, to C,, such as acetonitrile, propionitrile and butyronitrile, in an amount within the range of 0.1 to 4 percent by weight and preferably 0.3 to 2 percent by weight, and/or nitroalkane in C, to C,, such as nitromethane, nitroethane, nitropropane, and nitrobutane, in an amount within the range of 0.1 to 4 percent by weight and preferably 0.3 to 2 percent by weight.
• an alkyl nitrile in C, to C such as acetonitrile, propionitrile and butyronitrile
• nitroalkane in C, to C, such as nitromethane, nitroethane, nitropropane, and nitrobutane
• 40 ml trichloro-1,l,l ethane are placed in a reflux condenser along with the stabilizer in the form of an aluminum plate of 99.9 percent purity, 1 mm thick, mm long and 12 mm wide. This plate is partly immersed into the trichloro-l,l,l ethane.
• the heating time in the reflux condenser preceding the release of acid vapors and/or the buildup of a coloration of trichloro-l ,l ,1 ethane indicates the stabilization aptitude of the tested stabilizer combination.
• compositions were prepared with 1,1,l-trichloroethane containing the components as set forth in the following table and the compositions were submitted to tests for stabilization as in Example 4.
• a method for stabilizing halogenated saturated aliphatic hydrocarbon solvents having from one to four carbon atoms comprising the steps of forming a combination consisting essentially of trioxane, associated with at least one member selected from the group consisting of a lower alcohol and a liquid epoxide and adding said combination to the hydrocarbon, wherein 0.001 to 15 percent by weight of trioxane is associated with from 0.1 to 7.5 percent by weight of the alcohol when present and 0.1 to 4 percent by weight of the liquid epoxide when present.
• halogenated hydrocarbon is selected from the group consisting of dichloroethanes, trichloroethanes, tetrachloroethanes, 1,2-dichloropropanes, 1,2-dichloro and 2,3-dichlorobutanes, tribromoethanes and 1,2- dibromopropane.
• a stabilized composition consisting essentially of a halogenated saturated aliphatic hydrocarbon having from one to four carbon atoms containing from 0.001 to 15 percent by weight of trioxane and at least one member comprising from 0.1 to 7.5 percent by weight of a lower alcohol and from 0.1 to 4 percent by weight of a liquid epoxide.
• composition as claimed in claim 9 containing in addition a compound selected from the group consisting of a C, to C, alkyl nitrile and a C, to C nitroalkane in which the compound is present in an amount within the range of 0.1 to 4 percent by weight.
• composition asclaimed in claim in which the alkyl nitrile is acetonitrile and the nitroalkane is nitromethane.
• a stabilized composition consisting essentially of a halogenated saturated C to C aliphatic hydrocarbon solvent stabilized with trioxane present in an amount within the range of 0.001 to l5 percent by weight, at least one of the members selected from the group consisting of a lower alcohol and a liquid epoxide and mixtures thereof in which the alcohol is present in an amount within the range of 0.1 to 7.5 percent by weight when present, and the liquid epoxide is present in an amount within the range of 0.1 to 4 percent by weight when present, and at least one compound selected from the group consisting of a C to C alkyl nitrile'and a C 1,2-dichloropropanes, 1,2-dichloro and 2,3- dichlorobutanes, tribromoethanes and 1,2- dibromopropane.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Detergent Compositions (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=26180925

Family Applications (1)

Country Status (7)

Cited By (7)

Families Citing this family (2)

Citations (4)

• 1967
  • 1967-11-17 FR FR128693A patent/FR1567940A/fr not_active Expired
• 1968
  • 1968-08-16 CH CH1234568A patent/CH489448A/fr not_active IP Right Cessation
  • 1968-08-19 BE BE719662D patent/BE719662A/xx not_active IP Right Cessation
  • 1968-08-20 NL NL6811831.A patent/NL159647B/xx not_active IP Right Cessation
  • 1968-08-20 DE DE1793235A patent/DE1793235C3/de not_active Expired
  • 1968-08-20 GB GB39831/68A patent/GB1198583A/en not_active Expired
• 1971
  • 1971-03-03 US US00120739A patent/US3723331A/en not_active Expired - Lifetime

Patent Citations (4)

Also Published As

Similar Documents