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WO1992017289A1 - Procede et systeme de degraissage d'objets solides - Google Patents

Procede et systeme de degraissage d'objets solides Download PDF

Info

Publication number
WO1992017289A1
WO1992017289A1 PCT/US1992/002723 US9202723W WO9217289A1 WO 1992017289 A1 WO1992017289 A1 WO 1992017289A1 US 9202723 W US9202723 W US 9202723W WO 9217289 A1 WO9217289 A1 WO 9217289A1
Authority
WO
WIPO (PCT)
Prior art keywords
zone
solvent
liquid
ester
boiling range
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1992/002723
Other languages
English (en)
Inventor
Gene C. Weitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO1992017289A1 publication Critical patent/WO1992017289A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • C23G5/04—Apparatus
    • 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

Definitions

  • the prior art solutions to these cleaning problems have been directed to vapor degreasers using chlorinated solvents such as 1, 1, 1-trichloroethane, trichloroethylene, perchloroethylene or methylene chloride.
  • chlorinated solvents such as 1, 1, 1-trichloroethane, trichloroethylene, perchloroethylene or methylene chloride.
  • degreaser is a term of art for removing all manner of contaminants from solid surfaces such as oil, grease, welding flux, water surfactants, metal salts and the like.
  • the method of degreasing the surface of solid objects comprises the steps of:
  • Solvents which are preferred in the practice of this invention are broadly esters with a co-solvent such as an isoparaffin, i.e., a normally liquid branched chain alkane, having from 5 to 20, preferably from 11 to 14 carbon atoms per molecule * • having a boiling range from 450 *F to 550*F, e.g., from 475 *F to 530 ⁇ F.
  • a co-solvent such as an isoparaffin, i.e., a normally liquid branched chain alkane, having from 5 to 20, preferably from 11 to 14 carbon atoms per molecule * • having a boiling range from 450 *F to 550*F, e.g., from 475 *F to 530 ⁇ F.
  • solvents are preferable to the prior art halogenated, olefinic and/or aromatic solvents which pose environmental concerns.
  • rinse medium comprising relatively pure cleaning composition enters the system through conduit 48 and through a plurality of spray nozzles 26 spaced in vertical and circumferential relationship within zone 22.
  • the spray rinse liquid falls from zone 22 as droplets 68 into the immersion liquid 20.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

Procédé et système de dégraissage dans lesquels on immerge des éléments sales et graisseux dans un bain de solvant relativement impur (20) et dans lesquels on rince ensuite lesdits éléments dans un solvant relativement pur (68). On obtient en continu le solvant relativement pur en distillant une partie du solvant unique dans un système d'écoulement continu fermé (34). Le solvant utilisé est un mélange d'esters d'acide carbocylique aliphatique de faible masse moléculaire et d'un alcane généralement liquide à chaîne ramifiée.
PCT/US1992/002723 1991-04-08 1992-04-03 Procede et systeme de degraissage d'objets solides Ceased WO1992017289A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US68182491A 1991-04-08 1991-04-08
US681,824 1991-04-08

Publications (1)

Publication Number Publication Date
WO1992017289A1 true WO1992017289A1 (fr) 1992-10-15

Family

ID=24736985

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/002723 Ceased WO1992017289A1 (fr) 1991-04-08 1992-04-03 Procede et systeme de degraissage d'objets solides

Country Status (2)

Country Link
AU (1) AU1901992A (fr)
WO (1) WO1992017289A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995029276A1 (fr) * 1994-04-23 1995-11-02 Yule Catto & Co. Plc Nettoyage d'articles
GB2293834A (en) * 1994-04-23 1996-04-10 Yule Catto & Co Plc Article cleaning
EP0717654A4 (fr) * 1994-07-07 1997-12-29 Safety Kleen Corp Procede de recyclage d'un solvant de nettoyage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3460990A (en) * 1964-10-12 1969-08-12 Donald J Barday Method for cleaning objects with solvent
FR2296025A1 (fr) * 1974-12-27 1976-07-23 Cucco Georges Machine et procede pour le degraissage de pieces avec un solvant
US4589926A (en) * 1983-06-17 1986-05-20 Ab Holmstrands Platindustri Method and compact machine for treating printed circuit cards
US4817646A (en) * 1987-07-31 1989-04-04 Milo Brooks Method and apparatus for cleaning mini blinds

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3460990A (en) * 1964-10-12 1969-08-12 Donald J Barday Method for cleaning objects with solvent
FR2296025A1 (fr) * 1974-12-27 1976-07-23 Cucco Georges Machine et procede pour le degraissage de pieces avec un solvant
US4589926A (en) * 1983-06-17 1986-05-20 Ab Holmstrands Platindustri Method and compact machine for treating printed circuit cards
US4817646A (en) * 1987-07-31 1989-04-04 Milo Brooks Method and apparatus for cleaning mini blinds

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ENGINEERING PROGRESS, January 1985, HYDE, "New Developments in CIP Practices", pages 39-41. *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995029276A1 (fr) * 1994-04-23 1995-11-02 Yule Catto & Co. Plc Nettoyage d'articles
GB2293834A (en) * 1994-04-23 1996-04-10 Yule Catto & Co Plc Article cleaning
GB2293834B (en) * 1994-04-23 1998-03-18 Yule Catto & Co Plc Article cleaning
EP0717654A4 (fr) * 1994-07-07 1997-12-29 Safety Kleen Corp Procede de recyclage d'un solvant de nettoyage

Also Published As

Publication number Publication date
AU1901992A (en) 1992-11-02

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