DE7118557U - Mat made of fiber material - Google Patents

Description

^DB - ^{| NO} DIPL..ING.M. «C. O ₁ PL-PHVS. OH. OIPL.-PHV *. Λ HÖGER - LEGAL RIGHT-GRIESSBACH - HAECKER ^ PATENT LAWYERS IN STUTTGART

A 38 848 m

m - 134

May 11, 1971

Universal Oil Products Company

30 Algonquin Road

Des Plaines, Illinois 60016 / USA

Mat made of fiber material

The invention relates generally to a mat of fibrous material. In detail, the invention is based on a mat made of fibrous, flexible, porous, refractory, inorganic oxide for use directed when contacting a flow medium stream. The invention is also concerned with a particular type of Fließmediumkontaktierkairuaer, in which an embodiment of mat according to the invention is used.

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The use of materials of different types, shapes and from different substances ^, which are used for contacting flowing medium streams are known for both small and large industrial applications. Examples are the Filtration, in which fibers of various types are used to filter solid particles out of a flowing medium stream catalytic reactions using materials in particulate form, either as a catalyst support or directly as a catalyst for various types of catalytic reactions in refineries, etc., as well as various screens where materials of different shapes are used to separate or adsorb constituents in fluid streams. It is believed, however, that the particular mat disclosed herein and the method of making it, as well as the special fluid contacting chamber and also the preferred materials for forming this mat new and inventive are.

The invention is based on the object of a mat made of fiber material to create that is suitable for the contacting of fluid flows.

A method is also specified for producing such a mat from fiber material.

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The mat according to the invention is made of a fibrous, flexible, porous, refractory, inorganic oxide in the form of long staple fibers educated.

For use in a catalytic reactor, the mat according to the invention is also made of a flexible, fibrous,
porous, refractory, inorganic oxide formed by a long stack shape.

A preferred shape of the mat is the ring shape. A method for producing such a mat shape is given.

According to the invention, a flowing medium contacting chamber is also created which contains such a thin mat of fiber material, the flowing medium contact material in turn
consists of fiber material in a long stack shape.

Generally speaking, the invention is concerned with a tubular mat of fibrous material suitable for contacting a stream, this mat comprising a plurality of layers of fibrous, flexible, porous, refractory, inorganic oxide material, and each layer having a helical shape in
Has tubular or tubular shape coiled fiber. At this

The resulting ring shape can also be cut open

so
v / ground / that it takes on a flat shape. In the form of a ring, the matze can also be in an annular chamber or part of a
such chamber can be used. If on the individual layers

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is referred to as tubular, not only circular cross-sections are to be understood here, but arbitrary ones Cross-sections, for example oval cross-sections, or the like.

The invention also relates to a method for producing a mat of fibrous material which is suitable for a flow medium stream to contact. According to the method, a plurality of fiber layers of fiber yarn made of flexible, porous, Refractory, inorganic, oxide wound helically on a mandrel, so that the annular mat results.

A preferred source of fibers for use in accordance with the invention is a process in which a sol of fire-

solid, inorganic oxide with a fiber-forming organic

• Polymer is mixed, the fibers out of the mixture

■ drawn or spun, and then the organic Component is burned out and the fibers are brought into a flexible, porous shape by roasting or calcining. The so The resulting fiber yarns made of inorganic, refractory oxide can now be used as a filter medium as an adsorption and / or absorption medium as a catalyst and / or as a catalyst carrier will.

The refractory inorganic material colloidal solution as used in accordance with the invention includes aqueous ones Brine, for example made of aluminum oxide, chromium oxide, zirconium oxide, Silicon oxide, thorium oxide and the like, as well as mixtures of these Substances, for example brine made from aluminum and chromium oxide,

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m - 134

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or made of aluminum and zirconium oxide. These brines also close those solutions with a, which result from a hydrolysis and concentration of aqueous solutions one or more suitable Salts result, for example zirconium acetate, creating a colloidal Dispersion is formed which is stable in the remaining liquid. For explanation, the procedure is referred to on the production of aluminum oxide fibers described, however, it should be noted that the process for the production of fibers comprising other inorganic oxides or combinations thereof. The aluminum oxide mentioned here (Alumina) can e.g. B. by hydrolysis of a suitable acidic alurainium salt, for example aluminum chloride, aluminum sulfate, Aluminum nitrate, aluminum acetate, etc., can be prepared in aqueous solution. The solution will be under such conditions treated so that an acidic, low-anion solution (sol) results. The reduction in the concentration of acidic anions, how they are formed by the hydrolysis reaction can be produced in a known and customary manner. For example the anion concentration can be reduced by using aluminum metal as a neutralizing reagent. In this case the salt of neutralization is an aluminum salt that is in the final Soldnsatz is subjected to hydrolysis. When the acidic anion is sufficiently volatile, as is sometimes the case, for example in the case of aluminum acetate, the desired acidic, low-anion solution (sol) can be produced simply by warming or heating. Another method for

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Preparation of a useful sol from alumina includes Electrolysis of an aluminum salt solution / for example an aqueous aluminum chloride solution in an electrolytic cell with a porous partition r * '. see anode and cathode, whereby a low-anion salt solution (sol) can be obtained from the cathode compartment.

Preferably the sol is an aluminum chloride sol such as, for example is obtained by digesting all pellets or lumps in aqueous hydrochloric acid and / or aluminum chloride solution, and usually around the reflux temperature. Aluminum chloride solutions are preferably made to contain aluminum in an atomic weight ratio to chlorine of from about 1: 1 to 2: 1 included.

The fiber-forming, organic polymer must under fiberization conditions be essentially stable. The soluble, fiber-forming, organic polymers, as they come here in Frag «, include modified, natural products that are water-soluble derivatives obtained from naturally occurring substances be, as well as fiber-forming, organic polymers or Resins. For example, the soluble, fiber-forming, organic polymer can be a starch derivative, in particular starch acetate, Starch ether, an anionic starch, etc., or a soluble cellulose derivative such as alkyl and hydroxyalkyl cellulose derivatives, in particular methyl cellulose, ethyl cellulose, ethylmethyl cellulose, Hydroxymethyl cellulose, hydroxyethylmethyl cellulose, hydroxypropylmethyl cellulose, ethylhydroxymethyl cellulose, etc.,

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as well as water-soluble derivatives, preferably carboxymethyl cellulose, Carboxymethylhydroxyethyl cellulose and the like Preferably the legible, fiber-forming, organic polymer is a synthetic product, e.g. soluble; Polyalcohols, polyazides (polyacids), polyamines, polyethers

and polyamides, which are derived from a large number of synthetic Mororae

ren can be derived. According to the invention need aren,

!? synthetic, organic polymers include soluble poly-

vinyl alcohols, polyurethane, polyacrylic acid salts, polyacrylamides, polyvinyl methyl ethers, polyvinyl pyrrolidones, polyethylene oxides

\ and the like. Since the organic polymer in the manufacturing process

the fiber is consumed, it is desirable depending on the at

the fiber quality of the end product sought to use a minimum amount.

The inorganic, poorly fusible ones can be used as catalyst supports Oxide fibers are impregnated with a catalytically active metal or metal oxides. Of particular interest are there those catalysts which contain one or more metals from groups IB, V, VI, VII and VIII, including molybdenum, Tungsten, chromium, palladium, copper, nickel, platinum, iron, cobalt, ruthenium, rhodium, osmium and iridium. Independent of the special, difficult-to-melt or refractory materials used and the special manufacturing process

., · Such a catalyst support, can be the catalytically effective

: Metal component of the inorganic, refractory oxide in each

'I be inflicted appropriately.

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m - 134

May 11, 1971 - 8 -

The present invention also provides a chamber for contacting a flowable medium with a mat of fiber material, this mat consisting of several layers of fibers has a flexible, porous, inorganic, difficult-to-melt type, the helical _τ \ a tubular, perforated Screen are wrapped. The inside of the tubular umbrella mediates a distribution chamber for the contact material. The perforations of the helmet create a connection from the distribution chamber to the fiber material.

The following description of preferred embodiments of the invention is used in conjunction with the accompanying drawings of FIG further explanation. Show it:

Fig. 1 is a schematic representation of the production of an annular mat made of fiber material and

FIG. 2 shows a sectional view of a contact chamber with a mat produced according to FIG. 1.

Fig. 1 shows schematically a device for winding a Mat made of fiber material. A roll 1 is with a flexible, porous, refractory fiber yarn 2 made of an inorganic Oxide. ^ wraps »The yarn was made in the traditional way. It can be a catalytically active fiber or a fiber that is suitable as a catalyst carrier

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and which is already impregnated with the catalyst. Of simplicity For the sake of this, the device for mounting the roll 1 is not shown. The role 1 can continue through not shown Drive means are put into circulation. Furthermore, a tension coupling can be assigned to the role in order to Fiber yarn to maintain the required tension during winding. The fiber yarn 2 is through a ring 3 or another Threaded guide element. The ring 3 is driven so that it moves at a predetermined speed in the directions 4 and 5 moved back and forth. Furthermore, a motor 6 is provided, on the shaft of which a disk 7 is seated. The disc 7 is over an Eiciacn 9 connected to a disc 8, which in turn is attached to a Kexle 10. The shaft 10 is in stands 11 and 12 mounted so that it is rotatable between the stands. On the shaft .10 a core or mandrel 20 is attached to which the fiber yarn 2 is wound up. The core 20 can remain permanently on the shaft 10 and only serve as a mold which the fiber yarn 2 is wound up. On the other hand, the core 20 can also be perforated and then as a tubular, perforated one Serve sieve body in a contact chamber. In Fig. 1, a core 20 of the latter type with perforations 25 is shown. Since the perforated core 20 is hollow, it is supported by a cylinder 26 connected to the shaft 10. To the To be able to remove the finished, annular mat from the device, the left part of the shaft 10 can be releasably connected 27 be connected. Furthermore, the stand 12 can be set up in such a way that it can be pivoted away from the shaft 10. In this way, after the fiber yarn has been wound onto the removable core, it can be removed by making the connection 27 gexöst and the stand 12 pivoted away from the shaft 10 will.

- 10 -

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The mat is made by having several helically Layers of the fiber yarn 2 are wound onto the core until a mat 30 is formed. This is done in that the shaft 10 is reciprocated by the motor 6 at a predetermined speed in the directions 4 and 5. To get the fiber yarn at a To keep the tension constant, a tension coupling can be provided on the bearing of the roller 1, as I said. The concentration the finished mat can be controlled by the slope angle or the pitch between the individual fiber turns is adjusted accordingly. The mat becomes thicker the smaller the pitch of the screw. The manufacturing process described allows a mat of uniform and to produce adjustable density in each case. In certain applications and with certain fiber materials, a Binders used in conjunction with the fiber to help to form a coherent mat. The finished mat can then be cut open with or without a sieve and laid flat so that a substantially flat mat of fiber material results. On the other hand, the mat can also be used in its Leave the ring shape and use it as it is.

In Fig. 2, a contact chamber for a flowable medium is shown, for example a catalytic reaction chamber, which contains a mat 30 'made of fiber material. The mat 30 "is made made of several layers of a fibrous, flexible, porous, refractory, inorganic oxide. The fiber yarn in question is helically around a tubular screen 20 'with perforations

- 11 -

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25 ". The mat 30 ¹ is a preferred embodiment of an annular mat produced according to FIG. 1 with a core 20 * used as a sieve. The interior 40 of the sieve 20 'forms a distribution chamber for the relevant medium on the contact material, the perforations 'connect from this distribution chamber to the fibers of the mat 30 x. the chamber of FIG. 2 has also an outer tubular housing 41 having an end closure 42 with opening 43. also, a detachable end closure 44 m' 25th ■ an opening 45 is provided which communicates with the interior 40 of the sieve 20. A large, tubular sieve 50 with holes 51 is connected to the outer housing 41 by means of pin plates 52. The sieve 50 has an end closure 53 and is narrowed at a distance from the housing 41, so that a distribution chamber 55 results which is connected to the fiber material via the holes 51 The sieve 50 can also be omitted for more applications.

The mat 30 * with the sieve 20 ^; is inserted into the interior of the screen 50. The end closure 44 is then attached and sealed to the outer housing 41. In this way, a contact chamber is created in a relatively simple manner, which contains the fiber mat according to the invention produced according to FIG. To a certain extent, this fiber mat in the arrangement according to FIG. 2 represents a replaceable cartridge within the chamber. If, when the mat or chamber is used as a filter or reactor, the fiber material is soiled or used up

- 12 -

S 711855723.9.71

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the end closure 44 removed and the fiber mat replaced together with the screen. In Fig. 1 is the contact chamber shown only schematically without structural details. For sealing and securing the sealing end 44 Bolts or other fasteners are used on the housing. The chamber of Fig. 2 is ideal for catalytic running reactions suitable. In this case, the fiber material made of inorganic oxide serves as a catalyst or as a catalyst carrier, in the latter case the fiber material is impregnated with a catalyst.

Claims (8)

A 38 848 m m - 134 May 11, 1971 Claims for protection 1. Annular mat made of fiber matting for contacting nft: a flowing medium, characterized by several layers of a fibrous, flexible, porous, refractory, inorganic oxide, which in each layer in the form of a fiber yarn (2) is helically wound onto a tubular shape (20) is. Mat according to claim 1, characterized in that the fiber material Is alumina. 3. Mat according to claim 1, characterized in that the fiber material is chromium aluminum oxide. 4. Mat according to claim 1, 2 or 3, characterized in that the fiber material is impregnated with a catalyst. 5. Mat according to claim 4, characterized in that the catalyst Is platinum. 6. Mat according to claim 4, characterized in that the catalyst Copper is. · ■ - 2 « A 38 848 m
m - 134 \ 97i - 2 7. Mat according to one of claims 1-4, characterized in that that the fiber layers are wrapped around a tubular screen (20) are. 8. Mat according to one of claims 1-7, characterized in that it is on a v. '.. ^y . föntiigen sieve (20) is arranged and built into a left chamber (41) in such a way that the interior (40) of the sieve forms a distribution chamber for a flowable medium. 711S55723.9.71