DE3725330A1 - Process for cleaning casting systems for synthetic resins and other systems and elements bearing solvent and synthetic resin residues - Google Patents

Process for cleaning casting systems for synthetic resins and other systems and elements bearing solvent and synthetic resin residues

Info

Publication number
DE3725330A1
DE3725330A1 DE19873725330 DE3725330A DE3725330A1 DE 3725330 A1 DE3725330 A1 DE 3725330A1 DE 19873725330 DE19873725330 DE 19873725330 DE 3725330 A DE3725330 A DE 3725330A DE 3725330 A1 DE3725330 A1 DE 3725330A1
Authority
DE
Germany
Prior art keywords
synthetic resin
solvent
systems
resin residues
residues
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.)
Withdrawn
Application number
DE19873725330
Other languages
German (de)
Inventor
Juergen Kaiser
Erich Weiss
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19873725330 priority Critical patent/DE3725330A1/en
Publication of DE3725330A1 publication Critical patent/DE3725330A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/70—Maintenance
    • B29C33/72—Cleaning
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/008—Processes of polymerisation cleaning reaction vessels using chemicals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

Process for cleaning casting systems for synthetic resins and other systems and elements bearing solvent and synthetic resin residues, in particular for removing solvent residues, preferably N-methylpyrrolidone and synthetic resin residues from said systems and from said elements, the pressure around the solvent residues and synthetic resin residues being reduced and the solvent being heated to the boiling point corresponding to this pressure and evaporated and subsequently the evaporated solvent, together with the synthetic resin residues carried along, being drained into a downstream system and there condensed or separated into its components by distillation.

Description

Die Erfindung betrifft ein Verfahren zum Reinigen von Vergieß­ anlagen für Kunstharze und von sonstigen mit Lösungsmittel- und Kunstharzrückständen behafteten Anlagen und Elementen, insbeson­ dere ein Verfahren zum Entfernen von Lösungsmittel-, vorzugs­ weise von N-Methylpyrrolidon- und Kunstharzrückständen aus die­ sen Anlagen bzw. von diesen Elementen.The invention relates to a method for cleaning potting plants for synthetic resins and others with solvent and Equipment and elements with resin residues, in particular dere a method for removing solvent, preference from N-methylpyrrolidone and synthetic resin residues plants or of these elements.

Die Entfernung von Lösungsmittel- und Kunstharzrückständen erfolgt derzeit z.B. durch längeres Nachspülen der mit diesen Rückständen behafteten Anlagen und Elemente mit fettlösenden Stoffen, wie z.B. Spiritus bei gleichzeitiger Ultraschallein­ wirkung und einer Temperatur von etwa 70°C. Durch dieses Rei­ nigungsverfahren lassen sich jedoch Hohlräume und insbesondere enge Kanäle, wie sie häufig bei Vergießanlagen vorhanden sind, jedoch nur schwer oder unvollständig von dem Gemisch aus Lö­ sungsmittel und Kunstharz oder sonstigen Harzen befreien.The removal of solvent and resin residues is currently taking place e.g. by rinsing them for a long time Equipment and elements with grease-dissolving residues Fabrics such as Alcohol with simultaneous ultrasound effect and a temperature of about 70 ° C. Through this Rei cleaning process, however, cavities and in particular narrow channels, which are often found in casting machines, however difficult or incomplete of the mixture of Lö Free solvent and synthetic resin or other resins.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein Ver­ fahren zu schaffen, das sich gegenüber den bekannten Reinigungs­ verfahren durch einfache Anwendung und vollkommene Reinigung selbst in jenen Fällen auszeichnet, in denen die Rückstände be­ dingt durch z.B. enge Kanäle in den Vergießanlagen und dgl. nur schwer zugänglich sind.The present invention has for its object a Ver drive to create that compared to the well-known cleaning process through simple application and complete cleaning even in those cases where the residues are due to e.g. narrow channels in the casting machines and the like only are difficult to access.

Zur Lösung dieser Aufgabe sieht die Erfindung bei einem Verfah­ ren gemäß Oberbegriff des Patentanspruches vor, daß der die Lö­ sungsmittel- und Kunstharzrückstände umgebende Druck herabgesetzt und das Lösungsmittel auf seine diesem Druck entsprechende Sie­ detemperatur aufgeheizt und verdampft wird und daß das verdampf­ te Lösungsmittel samt mitgeführten Kunstharzrückständen abgelei­ tet wird.The invention provides for a method to achieve this object ren according to the preamble of the claim that the Lö pressure surrounding resin and resin residues is reduced and the solvent on its corresponding to this pressure the temperature is heated and evaporated and that the vaporization th solvent and synthetic resin residues removed  is tested.

Beim Verdampfen der Lösungsmittelrückstände bei im Vergleich zum Atmosphärendruck reduzierten Druck werden quasi die auf­ gelösten Kunstharzanteile vom Lösungsmittel mitgerissen. Durch Evakuieren, z.B. des Vergießanlageinneren auf etwa 1 mbar ge­ schieht dies bei N-Methylpyrrolidon als Lösungsmittel bereits bei ca. 70°C, ansonsten bei 202°C bei Normaldruck.When evaporating the solvent residues in comparison pressure reduced to atmospheric pressure, so to speak loosened synthetic resin parts entrained by the solvent. By Evacuate e.g. the inside of the casting plant to about 1 mbar this already happens with N-methylpyrrolidone as a solvent at approx. 70 ° C, otherwise at 202 ° C at normal pressure.

Das mit Kunstharzrückständen vermischte und verdampfte Lösungs­ mittel kann in einer z.B. der Vergießanlage nachgeschalteten Anlage bei Luftdruck kondensiert und das Kondensat entsorgt wer­ den.The solution mixed and evaporated with resin residues medium can e.g. downstream of the casting machine System condenses at air pressure and the condensate is disposed of the.

Grundsätzlich ist jedoch auch die Trennung des Kunstharz-Lö­ sungsmittelgemisches mittels Destillation in seine Komponenten möglich.In principle, however, the separation of the synthetic resin solder is also mixed solvent by means of distillation into its components possible.

Claims (4)

1. Verfahren zum Reinigen von Vergießanlagen z.B. für Kunst­ harze und sonstigen mit Lösungsmittel- und Kunstharzrückstän­ den behafteten Anlagen und Elementen, insbesondere zum Entfer­ nen von Lösungsmittelrückständen, vorzugsweise in Form von N-Methylpyrrolidon und Kunstharzrückständen aus diesen Anlagen bzw. von diesen Elementen, dadurch gekenn­ zeichnet, daß der die Lösungsmittel- und Kunstharzrück­ stände umgebende Druck herabgesetzt und das Lösungsmittel auf die diesem Druck entsprechende Siedetemperatur aufgeheizt und verdampft wird, und daß das verdampfte Lösungsmittel samt mit­ geführten Kunstharzrückständen abgeleitet wird.1. Process for cleaning casting plants, for example for synthetic resins and other systems and elements afflicted with solvent and synthetic resin residues, in particular for removing solvent residues, preferably in the form of N-methylpyrrolidone and synthetic resin residues from these plants or from these elements, thereby marked characterized in that the solvent and synthetic resin residues surrounding pressure is reduced and the solvent is heated to the boiling temperature corresponding to this pressure and evaporated, and that the evaporated solvent is derived together with guided synthetic resin residues. 2. Verfahren nach Anspruch 1, dadurch gekenn­ zeichnet, daß zum Reinigen von Vergießanlagen von N-Methylpyrrolidon- und Kunstharzrückständen, der Druck im Inneren von Vergießanlagen bzw. der die zu reinigenden Flächen umgebende Druck auf etwa 1 mbar herabgesetzt und das N-Methyl­ pyrrolidon auf ca. 70°C erhitzt wird.2. The method according to claim 1, characterized records that for cleaning pouring systems from N-methylpyrrolidone and resin residues, the pressure in Inside of casting machines or the surfaces to be cleaned surrounding pressure is reduced to about 1 mbar and the N-methyl pyrrolidone is heated to approx. 70 ° C. 3. Verfahren nach Anspruch 2, dadurch gekenn­ zeichnet, daß das mit Kunstharzrückständen vermischte und verdampfte Lösungsmittel in einer nachgeschalteten Anlage bei Luftdruck kondensiert und das Kondensat entsorgt wird.3. The method according to claim 2, characterized records that that mixed with synthetic resin residues and evaporated solvents in a downstream system condenses at atmospheric pressure and the condensate is disposed of. 4. Verfahren nach Anspruch 1 und 2, dadurch ge­ kennzeichnet, daß das mit Kunstharzrückständen vermischte und verdampfte Lösungsmittel durch Destillation in seine Komponenten getrennt wird.4. The method according to claim 1 and 2, characterized ge indicates that with synthetic resin residues mixed and evaporated solvents by distillation in its components is separated.
DE19873725330 1987-07-30 1987-07-30 Process for cleaning casting systems for synthetic resins and other systems and elements bearing solvent and synthetic resin residues Withdrawn DE3725330A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873725330 DE3725330A1 (en) 1987-07-30 1987-07-30 Process for cleaning casting systems for synthetic resins and other systems and elements bearing solvent and synthetic resin residues

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873725330 DE3725330A1 (en) 1987-07-30 1987-07-30 Process for cleaning casting systems for synthetic resins and other systems and elements bearing solvent and synthetic resin residues

Publications (1)

Publication Number Publication Date
DE3725330A1 true DE3725330A1 (en) 1989-02-09

Family

ID=6332749

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873725330 Withdrawn DE3725330A1 (en) 1987-07-30 1987-07-30 Process for cleaning casting systems for synthetic resins and other systems and elements bearing solvent and synthetic resin residues

Country Status (1)

Country Link
DE (1) DE3725330A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0530405A1 (en) * 1991-08-28 1993-03-10 Dirk Jan Blonk Process and apparatus for cleaning used containers using vacuum evaporation
EP2957356A3 (en) * 2014-06-20 2016-03-09 Westfalen Ag Method and device for detaching adhesions on workpieces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0530405A1 (en) * 1991-08-28 1993-03-10 Dirk Jan Blonk Process and apparatus for cleaning used containers using vacuum evaporation
EP2957356A3 (en) * 2014-06-20 2016-03-09 Westfalen Ag Method and device for detaching adhesions on workpieces

Similar Documents

Publication Publication Date Title
DE4244918C2 (en) Recycling wood material impregnated with uric acid or formaldehyde
DE3725330A1 (en) Process for cleaning casting systems for synthetic resins and other systems and elements bearing solvent and synthetic resin residues
DE959729C (en) Process for the production of ammonia from water containing ammonia
DE323649T1 (en) METHOD AND DEVICE FOR DECONTAMINATING MATERIAL.
DE19937902A1 (en) Removing benzene, naphthalene and water from coke oven gas comprises scrubbing in counter-current stream using absorbent consisting of triethylene glycol at head of absorber column
EP0224026B1 (en) Process and apparatus for extracting solids by means of organic solvents without obtaining waste water
DE2254523B2 (en) Method and device for the evaporation of radioactive liquids
DE2526826C3 (en) Method and device for separating accompanying substances from a gaseous mixture by partial direct ion densafion
DE496434C (en) Process for removing odorous substances and other contaminants from oils and fats that are volatile with water vapor or the like
DE329412C (en) Process for the extraction of low-boiling liquids from gas mixtures or gas vapor mixtures
DE69815170T2 (en) Device for separating a gas from a liquid and plant with such a device
DE557129C (en) Process for condensing the solvent distilled from the miscella in vacuo
DE2035859A1 (en) Purification of thermally unstable mater- - ials eg caprolactam
DE19930611B4 (en) Process for the separation of a mixture of solvent-saturated propellant gases and a purge gas, which has been subjected to the residual emptying aerosol cans and the mixture is collected in a process tank
DE598494C (en) Process for the simultaneous removal of smells and flavors and volatile acids from oils or fats with water vapor
DE509584C (en) Method and device for distilling hydrocarbons, in particular crude petroleum or tar, by means of steam
DE580874C (en) Process for the refining of fatty oils, fats and waxes of the ester type
DE2508189C3 (en) Process for extracting smoldering tar and system for carrying out the process
DE2018085A1 (en) Preparing recycled organic solvent for dyeing
DE3045877A1 (en) Solvent residue removed from bulk material - by steam with partial recycling through compressor and reheater, used esp. for removing per:chloroethylene from bones
AT159999B (en) Process for the recovery of used gas cleaning mass from Schefel.
DE1924831A1 (en) Organic solvent recovery from paint slurries
DE4320711A1 (en) Process for cleaning transformers
DE457762C (en) Process for separating phosphorus from phosphorus fumes
AT106847B (en) Process for the production of sulfuric acid.

Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee