CH477215A - Process for the filtration of cellulose acetate solution - Google Patents

Process for the filtration of cellulose acetate solution

Info

Publication number
CH477215A
CH477215A CH1749965A CH1749965A CH477215A CH 477215 A CH477215 A CH 477215A CH 1749965 A CH1749965 A CH 1749965A CH 1749965 A CH1749965 A CH 1749965A CH 477215 A CH477215 A CH 477215A
Authority
CH
Switzerland
Prior art keywords
filtration
cellulose acetate
acetate solution
filter
powdery
Prior art date
Application number
CH1749965A
Other languages
German (de)
Inventor
Mueller Hans Ing Dr
Original Assignee
Mueller Hans
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
Priority claimed from CH1593665A external-priority patent/CH446274A/en
Application filed by Mueller Hans filed Critical Mueller Hans
Priority to CH1749965A priority Critical patent/CH477215A/en
Priority to US595277A priority patent/US3482693A/en
Publication of CH477215A publication Critical patent/CH477215A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/18—Heating or cooling the filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B01D37/02—Precoating the filter medium; Addition of filter aids to the liquid being filtered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/2803—Sorbents comprising a binder, e.g. for forming aggregated, agglomerated or granulated products

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Filtration Of Liquid (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Description

       

  



  Verfahren zur Filtration von Celluloseacetatlösung
Gegenstand des Hauptpatentes ist ein Verfahren zur Filtration von Celluloseacetatlösung auf Anschwemmfiltern mit Scheibenelementen, bei welchem nach Beendigung der Filtration das Anschwemm-Filtermaterial aus dem Filterrückstand zwecks weiterer Verwendung wiedergewonnen wird. Es wurde bereits in der Beschreibung zum Hauptpatent erwähnt, dass bei dem Verfahren als Anschwemmittel körnige Mittel mit einfacher, z.B. kugeliger Teilchenform bevorzugt werden.



   Es hat sich nun gezeigt, dass als Filterhilfsmittel für diese Aufgabe pulvrige und feinstgekörnte Mineralien, wie Korund, Quarz, Marmor, überraschend gute Ergebnisse bei Filtration und auch Rückgewinnung bringen, wobei die Teilchengrösse vorzugsweise zwischen 50 und 150 Mikron liegen soll. Geringere Grösse ergibt, wie bekannt, schärferes Filtrat aber geringere Mengenleistung, grössere Teilchen hohe Mengenleistung aber schlechtere Klärung.



  



  Process for the filtration of cellulose acetate solution
The subject of the main patent is a process for the filtration of cellulose acetate solution on precoat filters with disc elements, in which, after the filtration, the precoat filter material is recovered from the filter residue for further use. It has already been mentioned in the description of the main patent that in the process, granular agents with simple, e.g. spherical particle shape are preferred.



   It has now been shown that, as filter aids for this task, powdery and finely grained minerals such as corundum, quartz, marble, bring surprisingly good results in filtration and recovery, the particle size preferably being between 50 and 150 microns. As is known, a smaller size results in a sharper filtrate but a lower volume output, while larger particles result in a higher volume output but poorer clarification.

Claims (1)

PATENTANSPRUCH Verfahren zur Filtration von in organischem Lösungsmittel gelöstem Celluloseacetat in Anschwemmfiltern nach Patentanspruch des Hauptpatentes, dadurch gekennzeichnet, dass als Filterhilfsmittel pulvrige und feinstgekörnte Mineralien zur Anwendung kommen. PATENT CLAIM Process for the filtration of cellulose acetate dissolved in organic solvent in precoat filters according to claim of the main patent, characterized in that powdery and finely grained minerals are used as filter aids. UNTERANSPRUCH Verfahren nach Patentanspruch, dadurch gekennzeichnet, dass die Teilchengrösse des Filterhilfsmittels im wesentlichen zwischen 50 und 150 Mikron gewählt wird. SUBClaim Method according to patent claim, characterized in that the particle size of the filter aid is chosen essentially between 50 and 150 microns.
CH1749965A 1965-11-18 1965-12-17 Process for the filtration of cellulose acetate solution CH477215A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CH1749965A CH477215A (en) 1965-11-18 1965-12-17 Process for the filtration of cellulose acetate solution
US595277A US3482693A (en) 1965-11-18 1966-11-17 Method and arrangement for separating solid material from a viscous substance

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1593665A CH446274A (en) 1965-11-18 1965-11-18 Process for the filtration of cellulose acetate solution
CH1749965A CH477215A (en) 1965-11-18 1965-12-17 Process for the filtration of cellulose acetate solution

Publications (1)

Publication Number Publication Date
CH477215A true CH477215A (en) 1969-08-31

Family

ID=25717219

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1749965A CH477215A (en) 1965-11-18 1965-12-17 Process for the filtration of cellulose acetate solution

Country Status (1)

Country Link
CH (1) CH477215A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2740307A1 (en) * 1976-09-07 1978-03-09 Chemap Ag PROCESS FOR THE SAND FILTRATION OF CELLULOSE ACETATE SOLUTIONS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2740307A1 (en) * 1976-09-07 1978-03-09 Chemap Ag PROCESS FOR THE SAND FILTRATION OF CELLULOSE ACETATE SOLUTIONS

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Legal Events

Date Code Title Description
PLZ Patent of addition ceased