Classifications

• • 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
  • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
  • C11D3/16—Organic compounds
  • C11D3/37—Polymers
  • C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
• • 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
• • 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
  • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
  • C11D2111/10—Objects to be cleaned
  • C11D2111/14—Hard surfaces
  • C11D2111/16—Metals

Definitions

• the polyvinyl chloride particles may be kept in motion by mechanically stirring the liquid cleaning solvent, particularly when the solvent is not boiling; but if the solvent is boiling a mechanical motion is not necessary since the polyvinyl chloride par- 2 ticles are kept in constant distribution in the liquid by the bubbles of vapor.
• the cleaning fluid consists of liquid trichlorethylene contained in a vat or tank of .any suitable dimensions which may be heated in any convenient manner since in some cases, depending upon the objects to be cleaned, it may be desirable to maintain the bath at an elevated or boiling temperature.
• liquid trichlorethylene there are dumped about 5% by weight of ball-shaped particles of polyvinyl chloride (mean molecular weight 47,000) of 0.5-1 mm. diameter. If the temperature of the trichloroethylene is 35 C. or less, the particles of polyvinyl chloride will float on the liquid, hence at such temperatures the bath is preferably kept in motion by any suitable mechanical means to elfect a distribution of the particles in the bath. When the temperature is raised above 35 C. the heating and boiling of the liquid agitates the liquid and effects a distribution of the polyvinyl chloride particles.
• the objects to be cleaned are lowered into, and submerged in, the cleaning bath. Not only the motion of the liquid referred to above, but also the descending motion of the submerging objects or plates themselves, and their subsequent ascending motion, causes the particles of polyvinyl chloride to positively wipe and rub against thesurfaces of said objects.
• the combined action of the trichlorethylene and the particles of polyvinyl chloride quickly removes all soluble impurities as well as insoluble impurities from the submerged objects.
• Any particles of polyvinyl chloride adhering to the cleaned objects after withdrawing the latter from the trichlorethylene are quickly removed by simply dipping such objects in a rinsing bath consisting of a liquid chlorinated hydrocarbon, for example liquid trichlorethylene.
• Example II The process described in Example 1 is repeated with only one difference, namely, the cleaning fluid consists of liquid perchlorethylene.
• the ball-shaped particles of polyvinyl chloride ordinarily float on perchlorethylene at any temperature. However, the particles are uniformly distributed in the liquid perchlorethylene either by any suitable mechanical motion or stirring, or by heating the liquid to a temperature of C. or higher, particularly during boiling.
• an effective distribution of the polyvinyl chloride balls in the solvent takes place positively by simply dipping (submerging) the objects to be cleaned into, and removing same from, the solvent. As a result the polyvinyl chloride balls are always distributed in the solvent, whether the solvent boils or not.
• Process for cleaning objects which comprises irnmersing them in and removing them from a substance selected from the group consisting of trichlorethylene and perchlorethylene and containing about 5% by weight of ball shapedarticles of polyvinyl chloride of 05-15mm. diameter.
• Process for cleaningobjects which comprises immer sing them. 'in and removing them from a chlorinated aliphatic hydrocarbon selected from the group; consisting of trichlorethylene a-nd perchlorethylene and containing about 5% by weightof finely distributed ball-shaped particles of polyvinyl chloride of 0.5-1 mm. diameter and means molecular weight 47,000, and'then rinsing the cleaned objects in a chlorinated hydrocarbon selected from the aforesaid group to remove the polyvinyl chloride particles.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Metallurgy (AREA)
• Mechanical Engineering (AREA)
• Materials Engineering (AREA)
• General Chemical & Material Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Wood Science & Technology (AREA)
• Detergent Compositions (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7592269

Family Applications (1)

Country Status (5)

Cited By (9)

Families Citing this family (5)

Citations (4)

• 1950
  • 1950-10-26 DE DEW4384A patent/DE829645C/de not_active Expired
• 1951
  • 1951-02-15 CH CH293129D patent/CH293129A/de unknown
  • 1951-10-17 GB GB24280/51A patent/GB696622A/en not_active Expired
  • 1951-10-22 FR FR1044059D patent/FR1044059A/fr not_active Expired
• 1956
  • 1956-10-01 US US612971A patent/US2901383A/en not_active Expired - Lifetime

Patent Citations (4)

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