SE199614C1

SE199614C1 -

Info

Publication number: SE199614C1
Authority: SE
Publication date: 1965-01-01

Description

Uppfinnare: G W Gartner Prioritet begard (ran den 8 oktober 1959 (Forbundsrepubliken Tgskland) I den tyska patentskriften 969 809 beskrives ett fOrfarande for regenerering 'XV anvant pap-per. Enligt detta forfarancle behandlas det anvanda pappret med ett bad, sorn innehaller a) vattenglas, b) minst en syreavgivande fOrening, sasom 'vateperoxid, natriumperoxid, perborat eller perkarbonat, c) minst en skyddskolloid, som inneballer kvave i amideller sulf4anamidartad bindning, och d) minst en kvavefri organisk forming med vdtande verkan eller tvattverkan. Sasom kvavehaltiga skyddskolloider anvander man foretradesvis kondensationsprodukter av ett losligt aggviteamne eller en hogniolekylar,aggvitespaltningsprodukt meti en tvalbildande fell-, hartsL- eller naftensyra eller med en alifatisk eller alifatiskaromatisk sulfonsyra. Sasom kvavefria vatoch tvattmedel ifragakomma exempelvis salter av alkylbenzensulfonat, van i alkylgruppen innehaller 10-18 kolatomer. Inventor: GW Gartner Priority requested (dated 8 October 1959 (Federal Republic of Germany) German Patent Specification 969 809 describes a process for regenerating XV used paper. (b) at least one oxygen-releasing compound, such as hydrogen peroxide, sodium peroxide, perborate or percarbonate; As nitrogen-containing protective colloids, condensation products of a soluble agguate or a hogniole alkylar are preferably used, aggvite cleavage product with an acylating precipitated, resin or naphthenic acid or with an aliphatic or aliphatic aromatic sulfonic acid. As nitrogen-free water and detergents, for example, salts of alkylbenzene sulfonate are used, and the alkyl group contains 10 to 18 carbon atoms.

Vid fortsatt utveckling av detta forfarande bar det visat sig, att man &hailer utmarkta resultat, em man i stallet f8r det i namnda patentskrift beskrivna badet anvander ett bad, som joke .innehaller nagon kvavehaltig skyddskolloid °oh i vilket det kvavefria vat- eller tvattrnedlet utgores av en fettalkoholpolyglykoleter. Helt overraskande medfor denim forenkling .av forfarandet icke nagra olagenheter. FOroreningarna i det anvanda papperet, sarskilt tryeksvarta och andra tryckfargamnen, bortlosas med badet genom i och for sig kanda atgarder, t. ex. genom filtrering pa en avvattningssil. In the further development of this process, it has been found that excellent results are obtained if, instead of the bath described in the said patent specification, a bath is used which jokes contains a nitrogen-containing protective colloid and in which the nitrogen-free water or water is formed. of a fatty alcohol polyglycol ether. Quite surprisingly, for denim simplification .of the procedure no any inconveniences. The impurities in the paper used, especially ink black and other ink dyes, are released with the bath through per se known measures, e.g. by filtration on a drainage strainer.

PA ett tryckt anvant papper Iar endost en relativt ringa del .av pappersfibrerna overdragna med trycksvarta. Be vanliga defibreringsmetoder, vilka anvandas for upparbetning av anvant popper, t. ex. finfordelndng i kollePt gang, behandling i en piper oeh behandling raffinor eller malningsanordning, asta.d-, komma .att tryckfargerna paforas alla fibrer, Sadana behandlingsmetoder medf Or darfor of, ta, alt ,avlagsnandet av tryckblacket avsevart forsvaras. P grund harav är det lampligt att icke defibrera olika anyanda papper fore be-handling ertligt uppfinningen utan att bringa papperet i lake defibrerat tillstand, t. ex. skuret i remsor, i kontakt med badet. Annu en fordel med detta behandlingssatt är att defibreringen mycket kraftigt underrattas genom behandlingen med peroxid-vatten-glas-tvattmedelslosningen. ON a printed used paper, only a relatively small part of the paper fibers is coated with printing black. Ask for common defibration methods, which are used for reprocessing used popper, e.g. finely divided in collection time, treatment in a pipe and treatment of refiners or grinding device, asta.d-, come .that the inks are paforas all fibers, Sadana treatment methods medf Or darfor of, take, alt, the deposition of the printing ink avsvart defended. Due to this, it is convenient not to defibrate various other papers prior to processing the invention without bringing the paper into the lake defibrated state, e.g. scrubbed in strips, in contact with the bath. Another advantage of this method of treatment is that the defibration is very strongly informed by the treatment with the peroxide-water-glass-detergent solution.

Vid fOroreningar, vilka aro mycket svara att avlagsna, I. ex. larger, är det i manga fall lampligt att defibrera det anvanda papperet efter behandlingen oeh sedan pa i och for sig kfint satt iitfora en flotation med hj alp av ett skummedel oeh en samlare. Be i fiberu fortfarande ingaende fargaonnena inforas harvid till storsta delen i 'skummet och kunna avlagsnas pa detta satt. In the case of impurities which are very likely to be removed, e.g. larger, it is in many cases appropriate to defibrate the used paper after the treatment and then in and of itself nicely put in place a flotation with the help of a foaming agent or a collector. In the case of fibers still intact, the dyes are introduced for the most part into the foam and can be removed in this way.

Om man onskar forlana sadant papper en annu hogre grad av vithet, är det lampligt att efter flotationen utfora en behandling med ett reducerande blekmedel, t. ex. med natriumditionit. If one wishes to give such paper an even higher degree of whiteness, it is advisable to carry out a treatment with a reducing bleach after flotation, e.g. with sodium dithionite.

Exempel 1. 500 kg tryekt tidningspapper indrarrkes i en kulkokare genom att denna halles i rorelse med 2 000 liter av en vattenlosning, som innehaller 10 kg natriumperoxid, 25 kg vattenglas (88° Be) och 2,5 kg av en icke-jonaktiv fettalkoholpolyglykoleter. Tidningspapperet far sedan sta tva timmar vid rumstemperatur. Example 1. 500 kg of printed newsprint is stirred into a ball boiler by stirring it with 2,000 liters of an aqueous solution containing 10 kg of sodium peroxide, 25 kg of water glass (88 ° Be) and 2.5 kg of a non-ionic fatty alcohol polyglycol ether. . The newsprint is then left to stand for two hours at room temperature.

Bet salunda behandlade materialet defibre- 2--- — ras val i en pulper med 7 500 liter vatten, utspades till en koneentration air 2 % oat fortjockas sedan medelst ,ett avvattningsfilter till en koneentration av 30 %. Efter denna be-handling dr storsta delen .av trycksvartan infOrd i det avskilda vattnet. Den fortjockade fibersuspensionen ledes darefter till en hollandare, dar den anvandes for beredning air pappersmassa. Bet salunda treated the material defibrated 2 --- - ras choice in a pulp with 7,500 liters of water, diluted to a concentration air 2% oat thickened then by means, a dewatering filter to a concentration of 30%. After this treatment, most of the printing black is introduced into the separated water. The thickened fiber suspension is then passed to a Dutchman, where it is used for the preparation of air pulp.

Genom innu en tvattningsbehandling air det pa avvattningsfiltret erhallna materialet ,(utspadning till en koneentration air 1 % och efterfOljande avvattning till en koneentration air 5 %)• kan det anvanda papperet ytterligare renas. By using a dewatering treatment in the material obtained on the dewatering filter, (dilution to a concentration of 1% and subsequent dewatering to a concentration of 5%) • the used paper can be further cleaned.

Utgangsmaterialet liar en vithet air 46-48 %, imedan vitheten efter den forsta tvattningen uppgar till 56-57 % och refter den andra tvattningen till 60-64 %. The starting material has a whiteness of 46-48%, while the whiteness after the first wash amounts to 56-57% and then the second wash to 60-64%.

Exempel 2. 500 kg air ett i farger tryekt illustrationspapper behandlas forst enligt exem.- pel 1. Efter defibrering vid en koneentration air ungefar 5 % utspades fibersuspensionen till en koncentrartion air 0,8 %. Darefter tillsatter man 5 liter petroleum och inleder tuft i en flotationsanordning. Efter avskiljning air skummet fOrtjoekas vattenfasen till en koncentration air Vo och installes vid 40° C med svavelsyra pa ett pH-varde air 5-6. Man tillsatter 2,5 kg natriumditionit och later fibersuspensionen sta en timme vid 40° C. Ut gangsmaterialets vithet, sum. uppgick till 48 %, fOrbatttas genom denna behandling till 6,0 —65 %. Example 2. 500 kg of a color-printed illustration paper is first treated according to Example 1. After defibration at a concentration of approximately 5%, the fiber suspension was diluted to a concentration of 0.8%. Then add 5 liters of petroleum and start tuft in a flotation device. After separation of the air foam, the aqueous phase is evaporated to a concentration of air Vo and installed at 40 ° C with sulfuric acid at a pH value of air 5-6. 2.5 kg of sodium dithionite are added and the fiber suspension is allowed to stand for one hour at 40 ° C. The whiteness of the starting material, sum. amounted to 48%, improved by this treatment to 6.0 —65%.

Claims

Patent claim:

Process for the regeneration of pepper used by means of a alkaline water bath, characterized in that a bath is used, etc. contains a) water glass, b) at least one acid-releasing compound, such as hydrogen peroxide, sodium peroxide, perborate or percarbonate rodh e) at least one fatty alcohol polyglycol ether .

2. A method according to claim 1, characterized in that the treatment is carried out without prior defibration on the paper used.

A method according to claim 1 or 2, characterized in that the treated material is defibrated and then floated on a per se set with a foaming agent and a collector.

4. A method according to claim 3, characterized in that a treatment with a reducing bleach is then carried out. Request publications: