DE2747604A1 - Regenerated cellulose sponge - used as matrix for particulate adsorbents used in breathing, filtration and purificn. appts. - Google Patents
Regenerated cellulose sponge - used as matrix for particulate adsorbents used in breathing, filtration and purificn. appts.Info
- Publication number
- DE2747604A1 DE2747604A1 DE19772747604 DE2747604A DE2747604A1 DE 2747604 A1 DE2747604 A1 DE 2747604A1 DE 19772747604 DE19772747604 DE 19772747604 DE 2747604 A DE2747604 A DE 2747604A DE 2747604 A1 DE2747604 A1 DE 2747604A1
- Authority
- DE
- Germany
- Prior art keywords
- adsorbent
- carrier
- regenerated cellulose
- purificn
- appts
- 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- Withdrawn
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
- B01J20/28014—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
- B01J20/28042—Shaped bodies; Monolithic structures
- B01J20/28045—Honeycomb or cellular structures; Solid foams or sponges
-
- 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
- B01J20/28016—Particle form
-
- 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
- B01J20/28023—Fibres or filaments
-
- 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
-
- 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
- B01J20/28033—Membrane, sheet, cloth, pad, lamellar or mat
-
- 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
- B01J20/28054—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 surface properties or porosity
- B01J20/28095—Shape or type of pores, voids, channels, ducts
- B01J20/28097—Shape or type of pores, voids, channels, ducts being coated, filled or plugged with specific compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
Description
Flächenhafter Träger aus regenerierter Cellulose mitFlat carrier made of regenerated cellulose with
Adsorbens, Verfahren zu seiner Herstellung und seine Verwendung Die Erfindung bezieht sich auf einen flächenhaften Träger aus regenerierter Cellulose mit Adsorbens, ein Verfahren zu seiner Herstellung und seine Verwendung.Adsorbent, process for its production and its use the The invention relates to a sheet-like carrier made of regenerated cellulose with adsorbent, a process for its manufacture and its use.
Unter einem Adsorbens versteht man einen oberflächenreichen Körper, der insbesondere aus Aktivkohle, Verbindungen mit Ionenaustauscherkapazität oder hydrophoben Kunststoffen, wie porösem Polystyrolharz oder Polyäthylen, besteht. Er vermag infolge von Oberflächenkräften Teilchen eines oder mehrerer Bestandteile eines Gases oder einer Lösung festzuhalten und dient somit zur Trennung und Reinigung von Stoffgemischen. Er zeigt gewöhnlich körnige, flächenhafte oder faserförmige Gestalt und wird beispielsweise in Gasmasken, Zigarettenfiltern, zur Reinigung von Abluft, Abwasser, Getränken, Nahrungsmitteln, zur Rückgewinnung von Lösungsmitteldämpfen, zur Flotation, bei katalytischen Reaktionen oder in der analytischen Chemie eingesetzt.An adsorbent is understood to mean a body with a large surface area, in particular made of activated carbon, compounds with ion exchange capacity or hydrophobic plastics such as porous polystyrene resin or polyethylene. As a result of surface forces, it is capable of particles of one or more components of a gas or a solution and thus serves for separation and cleaning of mixtures of substances. It usually shows grainy, planar or fibrous Shape and is used, for example, in gas masks, cigarette filters, for cleaning Exhaust air, sewage, beverages, food, for the recovery of solvent vapors, used for flotation, catalytic reactions or in analytical chemistry.
Aus der NL-PS 71 243 ist ein flächenhafter Träger aus regenerierter Cellulose mit Adsorbens bekannt. Zur Herstellung dieses dünnen Films wird das Adsorbens mit der Viskose gemischt. Anschließend wird mit Ammoniumsulfatlösung koaguliert und mit einer Lösung, die Schwefelsäure und Natriumsulfat enthält, regeneriert. Dieser Film wird als Dialysiermembran verwendet und zeigt Poren, deren Durchmesser im Nanometer-Bereich liegen. Entsprechend dieser Anwendung ist die geringe adsorbierende Wirkung des Trägers, insbesondere seine geringe Wasseraufnahmefähigkeit, unbeachtlich.From NL-PS 71 243 a planar carrier made of regenerated Cellulose known with adsorbent. The adsorbent is used to produce this thin film mixed with the viscose. Then it is coagulated with ammonium sulfate solution and regenerated with a solution containing sulfuric acid and sodium sulfate. This film is used as a dialysis membrane and shows pores, their diameter lie in the nanometer range. According to this application, the low adsorbent The effect of the carrier, in particular its low water absorption capacity, is irrelevant.
Demgegenüber besteht die Aufgabe der Erfindung darin, einen Träger aus regenerierter Cellulose mit hoher Flüssigkeitsaufnahme vorzuschlagen. Dieser erfindungsgemäße Träger soll außerdem nicht wie eine Membran nur in Flüssigkeiten gelöste Teilchen im molekularen Bereich trennen, sondern allgemein zur Filtration geeignet sein.In contrast, the object of the invention is to provide a carrier to propose made of regenerated cellulose with high fluid absorption. This In addition, carriers according to the invention are not intended to be used only in liquids like a membrane Separate dissolved particles in the molecular range, but generally for filtration be suitable.
Diese Aufgabe wird überraschenderweise gelöst, wenn anstelle einer Membran ein Schwamm aus regenerierter Cellulose als Träger eingesetzt wird.This object is surprisingly achieved when instead of one Membrane a sponge made of regenerated cellulose is used as a carrier.
Gegenstand der Erfindung ist somit ein flächenhafter Träger aus regenerierter Cellulose mit Adsorbens, der dadurch gekennzeichnet ist, daß er schwammartige Struktur aufweist, und das in Anspruch 5 gekennzeichnete Verfahren zu seiner Herstellung.The subject of the invention is thus a sheet-like carrier made of regenerated Cellulose with adsorbent, which is characterized in that it has a spongy structure comprises, and the method characterized in claim 5 for its production.
Unter flächenhaftem Träger ist insbesondere ein band- oder blattförmiges, dreidimensionales Gebilde zu verstehen, dessen Länge und Breite groß ist im Vergleich zur Dicke.A planar carrier is, in particular, a band or sheet-like, To understand three-dimensional structure, the length and width of which is large in comparison to the thickness.
Seine Dimensionen sind dem Verwendungszweck angepaßt, z.B.Its dimensions are adapted to the purpose of use, e.g.
durch Stanzen oder Zuschneiden. Unter schwammartiger Struktur ist insbesondere die bei Schwammtüchern bekannte Struktur zu verstehen, d.h. es sind mit bloßem Auge sichtbare Poren vorhanden.by punching or cutting. Is under a spongy structure in particular to understand the structure known from sponge cloths, i.e. they are pores visible to the naked eye.
Der flächenhafte Träger aus regenerierter Cellulose erhält die schwammartige Struktur deshalb vorzugsweise nach dem von der Schwammtuchherstellung bekannten Verfahren. Das bzw. die Adsorbentien werden in die Viskose z.B. durch Einrühren oder Kneten eingearbeitet. Zusätzlich werden in die Viskose zur Porenbildung Salzkörner, insbesondere Glaubersalzkristalle, gewünschter Korngröße und gegebenenfalls Verstärkungsfasern, z.B. aus Baumwolle, eingetragen.The planar carrier made of regenerated cellulose maintains the sponge-like appearance The structure is therefore preferably based on that known from the manufacture of sponge cloths Procedure. The or the adsorbents are in the viscose e.g. by Stir in or kneading incorporated. In addition, grains of salt are added to the viscose to form pores, in particular Glauber's salt crystals, desired grain size and, if necessary, reinforcing fibers, e.g. made of cotton.
Daraufhin wird die Masse beispielsweise auf ein endloses Trägerband aufgebracht und in der Hitze durch das Koagulationsmedium, z.B. durch ein Wasserbad von ca.The mass is then placed on an endless carrier belt, for example and in the heat through the coagulation medium, e.g. through a water bath from approx.
100°C, ausgefällt. Im Wasserbad wird ein Großteil des Salzes gelöst und ausgewaschen. Danach durchläuft der porige, vorzugsweise bandförmige, Körper ein Fällbad mit wäßriger Schwefelsäure und gegebenenfalls ein Chloritbleichbad. Abschließend wird mit Wasser gewaschen, getrocknet und zur gewünschten Breite und Länge gestanzt.100 ° C, precipitated. Most of the salt is dissolved in the water bath and washed out. The porous, preferably band-shaped, body then passes through it a precipitation bath with aqueous sulfuric acid and optionally a chlorite bleach bath. Finally, it is washed with water, dried and to the desired width and Punched length.
Unter Adsorbens sind insbesondere die eingangs genannten Stoffe zu verstehen, die körnige, flächenhafte und/oder faserförmige Gestalt zeigen. Körniges, d.h. pulverförmiges oder granuliertes Adsorbens hat je nach Verwendungszweck eine durchschnittliche Teilchengröße von 0,05 bis 5 mm, faserförmiges Adsorbens eine mittlere Faserlänge von 0,05 bis etwa 15 mm. Eine flächenháfte Gestalt des Adsorbens ist insbesondere ein aus Fasern bestehendes Gewebe.The substances mentioned at the beginning are in particular included under adsorbent understand that show grainy, planar and / or fibrous shape. Grainy, i.e. powdered or granulated adsorbent has a depending on the purpose average particle size of 0.05 to 5 mm, fibrous adsorbent one mean fiber length from 0.05 to about 15 mm. A flat shape of the adsorbent is in particular a fabric made of fibers.
Das Adsorbens ist in den TrXger eingebettet und befindet sich auch auf dessen Oberflche. Die Menge des Adsorbens im Verhältnis zum Träger kann in weiten Bereichen variiert werden.The adsorbent is embedded in the TrXger and is also located there on its surface. The amount of adsorbent in relation to the carrier can be wide Areas can be varied.
Wird als Adsorbens Aktivkohle verwendet, kann z.B. eine Menge von 1 bis 80 Gewichtsprozent, bezogen auf den Träger, vorhanden sein. Im allgemeinen werden allerdings 30 bis 60 Gewichtsprozent bevorzugt.If activated carbon is used as the adsorbent, e.g. a quantity of 1 to 80 percent by weight, based on the Carrier, be present. In general, however, from 30 to 60 percent by weight is preferred.
Der erfindungsgemäße Gegenstand findet Verwendung zur Reinigung von Gasen und Flüssigkeiten, z.B. als Atemschutz beim Arbeiten mit organischen Lösungsmitteln, wobei er für diesen Zweck gebogene Form, insbesondere eine an die abzudeckende Gesichtshälfte angepaßte Oberfläche aufweisen kann, oder zur Reinigung von Abluft oder Abwasser.The object according to the invention is used for cleaning Gases and liquids, e.g. as respiratory protection when working with organic solvents, for this purpose it has a curved shape, in particular one on the half of the face to be covered May have adapted surface, or for cleaning exhaust air or waste water.
Soll der flächenhafte Träger mit einem Gegenstand mit schweißfähiger bzw. siegel fähiger Oberfläche durch Siegeln oder Schweißen verbunden werden, z.B. mit einer geeigneten Kunststoffolie, so befinden sich zwischen den Poren des flächenhaften Trägers Teilchen aus thermoplastischem organischem Kunststoff.Should the planar carrier with an object with weldable or sealable surface are connected by sealing or welding, e.g. with a suitable plastic film, so are located between the pores of the sheet-like Carrier particles made of thermoplastic organic plastic.
Dieser Kunststoffteilchen enthaltende flächenhafte Träger wird vorzugsweise erhalten durch zusätzliches Einrühren oder Kneten von Pulver, Fasern und/oder Fibriden aus thermoplastischem organischem Kunststoff in die Viskose, die anschließend analog zur Schwammtuchherstellung koaguliert wird. Unter Fibriden sind die als "synthetic wood pulp" bekannten Verbindungen zu verstehen.This sheet-like carrier containing plastic particles is preferred obtained by additionally stirring in or kneading powder, fibers and / or fibrids from thermoplastic organic plastic into the viscose, which is then analogous is coagulated for the production of a sponge cloth. Among fibrids are those as "synthetic wood pulp "to understand known compounds.
Vorzugsweise ist dieser thermoplastische organische Kunststoff ein Homo- oder Copolymeres von Olefinen, ein Polyamid, Polyvinylchlorid oder Polystyrol, insbesondere Polyäthylen. Eine Mindestmenge von etwa 3 Gewichtsprozent an Kunststoffteilchen, bezogen auf den flächenhaften Träger, ist erforderlich, während ein Anteil von größer als 35 bis 40 Gewichtsprozent nicht notwendig ist. Die Pulverteilchen können eine Größe von etwa 0,001 bis zu ca.This thermoplastic organic plastic is preferably a Homo- or copolymer of olefins, a polyamide, polyvinyl chloride or polystyrene, especially polyethylene. A minimum of about 3 percent by weight of plastic particles, based on the two-dimensional Carrier, is required while a proportion of greater than 35 to 40 percent by weight is not necessary. The powder particles can have a size of about 0.001 up to approx.
2 mm, Fasern und Fibride eine mittlere Länge von ca. 0,05 bis 15 mm aufweisen.2 mm, fibers and fibrids an average length of approx. 0.05 to 15 mm exhibit.
Der Kunststoffteilchen enthaltende flächenhafte Träger zeigt außer dem Vorteil, schweißfähig bzw. siegelfähig zu sein, andere überraschende Eigenschaften, die zu weiteren Verwendungsmöglichkeiten des neuerungsgemäßen Trägers führen.The sheet-like carrier containing plastic particles also shows the advantage of being weldable or sealable, other surprising properties, which lead to further possible uses of the carrier according to the renewal.
So kann er bei erhöhter Temperatur zu einer bestimmten dreidimensionalen, feuchtigkeitsstabilen Form gepreßt werden. Die Temperatur wird so gewählt, daß der eingearbeitete Kunststoff einen plastischen Zustand erreicht.In this way, at an elevated temperature, it can move to a certain three-dimensional, moisture-stable form are pressed. The temperature is chosen so that the incorporated plastic reaches a plastic state.
Der gepreßte Träger behält seine Form auch im feuchten Zustand bei.The pressed carrier retains its shape even when wet.
Der in Figur 1 als Ausführungsbeispiel im Schnitt gezeigte Träger zeigt Poren 1 und Adsorbensteilchen 2.The carrier shown in section as an exemplary embodiment in FIG shows pores 1 and adsorbent particles 2.
LeerseiteBlank page
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772747604 DE2747604A1 (en) | 1977-10-24 | 1977-10-24 | Regenerated cellulose sponge - used as matrix for particulate adsorbents used in breathing, filtration and purificn. appts. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772747604 DE2747604A1 (en) | 1977-10-24 | 1977-10-24 | Regenerated cellulose sponge - used as matrix for particulate adsorbents used in breathing, filtration and purificn. appts. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2747604A1 true DE2747604A1 (en) | 1979-04-26 |
Family
ID=6022102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19772747604 Withdrawn DE2747604A1 (en) | 1977-10-24 | 1977-10-24 | Regenerated cellulose sponge - used as matrix for particulate adsorbents used in breathing, filtration and purificn. appts. |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2747604A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0031719A2 (en) * | 1979-12-28 | 1981-07-08 | Albany International Corp. | Sorbent-loaded textile fibers and films and methods of fabricating the same |
| EP0043759A1 (en) * | 1980-06-30 | 1982-01-13 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Hydrophilic substrate for sorbing heavy metals and method for making such substrate |
| DE3043022A1 (en) * | 1980-10-30 | 1982-05-13 | Toho Beslon Co., Ltd., Tokyo | FIBER-SHAPED ACTIVATED CARBON WITH A METAL CHELATE COMPOSITE, METHOD FOR THE PRODUCTION AND USE THEREOF |
| EP0418563A1 (en) * | 1989-08-18 | 1991-03-27 | Pall Corporation | Void-containing sorbent pad |
| US5226937A (en) * | 1989-08-18 | 1993-07-13 | Pall Corporation | Void-containing sorbent pad |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2634994A1 (en) * | 1975-08-11 | 1977-02-24 | Akzo Gmbh | MATRIX FIBERS MADE FROM RAYON AND COPOLYMERISATES FROM POLYACRYLIC AND METHACRYLIC ACID |
-
1977
- 1977-10-24 DE DE19772747604 patent/DE2747604A1/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2634994A1 (en) * | 1975-08-11 | 1977-02-24 | Akzo Gmbh | MATRIX FIBERS MADE FROM RAYON AND COPOLYMERISATES FROM POLYACRYLIC AND METHACRYLIC ACID |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0031719A2 (en) * | 1979-12-28 | 1981-07-08 | Albany International Corp. | Sorbent-loaded textile fibers and films and methods of fabricating the same |
| EP0031719A3 (en) * | 1979-12-28 | 1981-07-22 | Albany International Corporation | Sorbent-loaded textile fibers and films and methods of fabricating the same |
| EP0043759A1 (en) * | 1980-06-30 | 1982-01-13 | EASTMAN KODAK COMPANY (a New Jersey corporation) | Hydrophilic substrate for sorbing heavy metals and method for making such substrate |
| DE3043022A1 (en) * | 1980-10-30 | 1982-05-13 | Toho Beslon Co., Ltd., Tokyo | FIBER-SHAPED ACTIVATED CARBON WITH A METAL CHELATE COMPOSITE, METHOD FOR THE PRODUCTION AND USE THEREOF |
| EP0418563A1 (en) * | 1989-08-18 | 1991-03-27 | Pall Corporation | Void-containing sorbent pad |
| US5226937A (en) * | 1989-08-18 | 1993-07-13 | Pall Corporation | Void-containing sorbent pad |
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| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| 8130 | Withdrawal |