DE19833629A1 - Free-flowing, non-scale forming formamidine-sulfinic acid mixtures for use in reductive bleaches in the paper and textiles industries - Google Patents
Free-flowing, non-scale forming formamidine-sulfinic acid mixtures for use in reductive bleaches in the paper and textiles industriesInfo
- Publication number
- DE19833629A1 DE19833629A1 DE19833629A DE19833629A DE19833629A1 DE 19833629 A1 DE19833629 A1 DE 19833629A1 DE 19833629 A DE19833629 A DE 19833629A DE 19833629 A DE19833629 A DE 19833629A DE 19833629 A1 DE19833629 A1 DE 19833629A1
- Authority
- DE
- Germany
- Prior art keywords
- fas
- formamidine
- deposit inhibitor
- silica
- sulfinic acid
- 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- Withdrawn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
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/34—Organic compounds containing sulfur
- C11D3/349—Organic compounds containing sulfur additionally containing nitrogen atoms, e.g. nitro, nitroso, amino, imino, nitrilo, nitrile groups containing compounds or their derivatives or thio urea
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C381/00—Compounds containing carbon and sulfur and having functional groups not covered by groups C07C301/00 - C07C337/00
- C07C381/14—Compounds containing a carbon atom having four bonds to hetero atoms with a double bond to one hetero atom and at least one bond to a sulfur atom further doubly-bound to oxygen atoms
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/0005—Other compounding ingredients characterised by their effect
- C11D3/0042—Reducing agents
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/02—Inorganic compounds ; Elemental compounds
- C11D3/12—Water-insoluble compounds
- C11D3/124—Silicon containing, e.g. silica, silex, quartz or glass beads
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/30—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using reducing agents
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1026—Other features in bleaching processes
- D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Textile Engineering (AREA)
- Inorganic Chemistry (AREA)
- Detergent Compositions (AREA)
Abstract
Description
Die Erfindung betrifft Abmischungen die Formamidinsulfin säure (FAS), einen Belagverhinderer und/oder feinteilige Kieselsäure enthalten.The invention relates to blends of formamidine sulfine acid (FAS), a deposit inhibitor and / or finely divided Contain silica.
Formamidinsulfinsäure (FAS) wird zur reduktiven Bleiche in der Papier- und Textilindustrie in Form einer wäßrigen, alkalischen Lösung eingesetzt. Während FAS in Wasser relativ schlecht löslich ist (ca. 27 g/l), gehen unter alkalischen Bedingungen bis zu 100 g/l FAS als Sulfinat in Lösung. Für die Bleichflotte liegt das optimale Mengenverhältnis zwischen FAS und Lauge (NaOH, Na2CO3) bei etwa 2 : 1. Von Nachteil ist, daß sich die Salze der Formamidinsulfinsäure in wäßriger Lösung rasch zersetzen. Alkalische Bleichlösungen werden daher in der Papierindustrie erst kurz vor dem Zudosieren hergestellt und müssen dann möglichst umgehend verbraucht werden.Formamidine sulfinic acid (FAS) is used for reductive bleaching in the paper and textile industry in the form of an aqueous, alkaline solution. While FAS is relatively poorly soluble in water (approx. 27 g / l), up to 100 g / l FAS dissolve as sulfinate under alkaline conditions. For the bleaching liquor, the optimal quantitative ratio between FAS and alkali (NaOH, Na 2 CO 3 ) is about 2: 1. The disadvantage is that the salts of formamidine sulfinic acid rapidly decompose in aqueous solution. Alkaline bleaching solutions are therefore only produced in the paper industry shortly before metering in and must then be used as soon as possible.
Für die kontinuierliche Herstellung und Dosierung von Bleichlösungen aus FAS und NaOH wurde eine spezielle Dosieranlage konzipiert, die bei der Mehrzahl der FAS- Kunden in Betrieb ist. Die Anlagen laufen dabei 24 h/Tag (je nach Bedarf kampagnenweise oder mehrere Monate durchgehend). Manpower zur ständigen Überwachung der FAS- Dosierung steht dabei nicht oder nur wenig zur Verfügung. Während die Zugabe der alkalischen FAS-Bleichlösung bei der kontinuierlich arbeitenden Dosieranlage gut funktioniert, bereitet die FAS-Dosierung immer wieder betriebliche Probleme: FAS backt im Einfülltrichter (Schacht) zusammen und rutscht nicht nach, was eine verminderte Zugabe sowie eine Verdichtung von FAS im Schneckenbereich zur Folge hat. Für Abhilfe sollen derzeit der Einbau von Vibratoren bzw. pneumatischen Klopfern im Schacht sorgen. Durch die schwankende Rieselfähigkeit/Kornbeschaffenheit kommt es oftmals zur schwankenden Dosiermengen bei konstanter Schneckendrehzahl. For the continuous production and dosing of Bleaching solutions made from FAS and NaOH became a special one Dosing system designed for the majority of FAS Customer is operating. The systems run 24 hours a day (Campaigns or several months as required continuous). Manpower for constant monitoring of the FAS Dosage is not available or only very little. While adding the alkaline FAS bleaching solution to the continuously working dosing system works well, always prepares the FAS dosage for operational purposes Problems: FAS cakes in the hopper and does not slip, which means a reduced encore as well results in a compression of FAS in the screw area. As a remedy, the installation of vibrators or pneumatic knockers in the shaft. Through the fluctuating pourability / grain quality occurs often to fluctuating dosing quantities at constant Screw speed.
Auch die Lagerung von FAS bereitet öfters Schwierigkeiten, da FAS nur eine geringe thermische Stabilität besitzt. So liegt die SADT (self accelerating decomposition temperature) bei 50°C. Da je nach Lagerbedingungen immer wieder mit Temperaturen deutlich über 30 Grad zu rechnen ist, kommt es hier zu Problemen mit der Lagerstabilität. Bereits nach wenigen Monaten tritt ein deutliches Nachlassen der Rieselfähigkeit bis hin zum Verklumpen (FAS ist schwach hygroskopisch), eine Gelbfärbung sowie die Erhöhung des Thioharnstoffgehaltes ein. Letzteres ist von besonderer Bedeutung, wenn die in vielen Ländern kennzeichnungspflichtige Grenze von 0,1% Thioharnstoff (TH) überschritten wird.Storage of FAS is also often difficult, because FAS has only a low thermal stability. So is the SADT (self accelerating decomposition temperature) at 50 ° C. Because depending on storage conditions always again with temperatures well over 30 degrees there are problems with storage stability. After just a few months, a clear one occurs Loss of flowability to the point of clumping (FAS is weakly hygroscopic), a yellowing as well as the Increase in the thiourea content. The latter is from of particular importance when in many countries Limit of 0.1% thiourea subject to labeling (TH) is exceeded.
Viele in der Industrie gängige Phegmatisierungsmittel verbessern zwar die thermische Stabilität von FAS, sie können jedoch nicht zugemischt werden, da sie die Bildung eines unangenehmen Schwefelwasserstoff-ähnlichen Geruches bewirken.Many phegmatizing agents common in industry improve the thermal stability of FAS, they However, they cannot be mixed in since they are forming an unpleasant smell similar to hydrogen sulfide cause.
Neben der schlechten Rieselfähigkeit stellen insbesondere Kalkablagerungen in Auflösekesseln und Rohrleitungen von FAS-Dosierleitungen ein Problem dar. Bedingt durch den hohen pH-Wert der FAS-Bleichlösungen versagen gängige Scale-Inhibitoren.In addition to the poor pourability, in particular Limescale deposits in dissolving boilers and pipes from FAS dosing lines pose a problem The high pH value of the FAS bleaching solutions fails Scale inhibitors.
Zur Beseitigung der Kalkablagerungen müssen die Anlagen abgestellt, mit Mineralsäuren gespült und gereinigt werden.The systems must be removed to remove the lime deposits turned off, rinsed with mineral acids and cleaned.
Aufgabe der Erfindung ist es, ein FAS bereitzustellen, das auch bei Lagerung rieselfähig bleibt und bei seiner Anwendung die Bildung von Kalkablagerungen verhindert. Gleichzeitig ist es ein Ziel, die Lagerstabilität durch Phlegmatisierung des FAS zu erhöhen.The object of the invention is to provide a FAS that remains free-flowing even during storage and at its Application prevents the formation of limescale. At the same time, it is a goal to ensure storage stability Increase phlegmatization of the FAS.
Gegenstand der Erfindung sind Abmischungen, die aus FAS, einem Belagverhinderer (pulverförmig oder granuliert) mit einem bevorzugt sauren oder neutralen pH-Wert, und/oder einer feinteiligen, bevorzugt gefällten hydrophilen Kieselsäure bestehen.The invention relates to mixtures composed of FAS, a deposit inhibitor (powdered or granulated) with a preferably acidic or neutral pH, and / or a finely divided, preferably precipitated hydrophilic Silicic acid exist.
Es ist jedoch auch möglich, hydrophobierte Kieselsäuren einzusetzen.However, it is also possible to use hydrophobicized silicas to use.
Die Phlegmatisierung des FAS tritt bereits ein, wenn allein die Kieselsäure eingemischt worden ist. Enthält die Abmischung den Belagverhinderer und Kieselsäure, setzt man dem FAS vorteilhaft eine vorher hergestellte Mischung aus Belagverhinderer und Kieselsäure in den gewünschten Konzentrationsverhältnissen zu.The phlegmatization of the FAS already occurs when alone the silica has been mixed in. Contains the Mixing the deposit inhibitor and silica, you put the FAS advantageously a mixture prepared beforehand Anti-scale and silica in the desired Concentration ratios too.
Die Kieselsäure wird im allgemeinen in einer Menge von 0,001 Gew.-% bis 5 Gew.-%, insbesondere 0,01 Gew. bis 2 Gew.-%, bezogen auf die Gesamtmenge der Abmischung zugesetzt.The silica is generally in an amount of 0.001% by weight to 5% by weight, in particular 0.01% by weight to 2 % By weight, based on the total amount of the mixture added.
Die eingesetzten Kieselsäuren weisen im allgemeinen eine BET-Oberfläche (N2) (DIN 66131) von 60 bis 700 m2/g auf, besonders mit einer Oberfläche von 100 bis 450 m2/g.The silicas used generally have a BET surface area (N 2 ) (DIN 66131) of 60 to 700 m 2 / g, especially with a surface area of 100 to 450 m 2 / g.
Zu den Belagverhinderern zählen in Wasser lösliche Komplexbildner wie Poly-(hydrocarboxylate), Polyphosphonsäuren, Zitronensäure, insbesondere aber Polyacrylsäuren, die durch Homopolymerisation erhalten werden, und deren Alkali-, insbesondere Natriumsalze sowie Maleinsäure/Acrylsäure-Copolymersate und deren Natriumsalze oder deren Gemische. Sie werden in einer Menge von 0,05 bis 4 Gew.-%, bevorzugt 0,1 bis 2 Gew.-%, bezogen auf die Gesamtmenge der Abmischung, eingesetzt.The deposit inhibitors include water-soluble ones Complexing agents such as poly (hydrocarboxylates), Polyphosphonic acids, citric acid, but especially Polyacrylic acids obtained by homopolymerization are, and their alkali, especially sodium salts and Maleic acid / acrylic acid copolymersate and their sodium salts or their mixtures. They are in an amount from 0.05 to 4 wt .-%, preferably 0.1 to 2 wt .-%, based on the Total amount of the mix used.
Die Abmischung wird auf 100% mit handelsüblichem FAS aufgefüllt.The mixture is made to 100% with standard FAS replenished.
Die Abmischungen werden auf bekanntem Weg hergestellt und lassen sich unter Praxisbedingungen gut auflösen. Der Bleicheffekt ändert sich gegenüber dem ohne die erfindungsgemäßen Beimischungen enthaltenden FAS nicht.The blends are produced in a known way and can be easily resolved under practical conditions. Of the Bleaching effect changes compared to that without FAS containing admixtures according to the invention not.
Versuche mit FAS-Abmischungen, die 0,3 Gew.-% eines Gemisches aus einer handelsüblichen sprühgetrockneten Kieselsäure und einer Polyacrylsäure enthalten, führen zu einem auch nach mehreren Monaten noch rieselfähigen Produkt, das auch die angestrebte Lagerstabilität aufweist.Experiments with FAS blends, the 0.3 wt .-% of a Mixture from a commercially available spray-dried Contain silica and a polyacrylic acid lead to a free-flowing one even after several months Product that also has the desired storage stability.
Beläge bildeten sich unter den für die Bewertung ausschlaggebenden Betriebsbedingungen im Auflösekessel oder den Rohrleitungen nicht.Coatings formed among those for the evaluation decisive operating conditions in the dissolving boiler or not the pipes.
Claims (8)
Priority Applications (16)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833629A DE19833629A1 (en) | 1998-05-20 | 1998-07-25 | Free-flowing, non-scale forming formamidine-sulfinic acid mixtures for use in reductive bleaches in the paper and textiles industries |
PE1999000405A PE20000623A1 (en) | 1998-05-20 | 1999-05-14 | FAS COMBINED MIXTURES |
NZ335804A NZ335804A (en) | 1998-05-20 | 1999-05-17 | Bleaching formulation comprising formamidinesulfinic acid, an anti-coating agent and silica |
DE59906988T DE59906988D1 (en) | 1998-05-20 | 1999-05-18 | Formamidinesulfinic mixes |
EP99109734A EP0959175B1 (en) | 1998-05-20 | 1999-05-18 | Compositions comprising formamidinesulfinic acid |
AT99109734T ATE250161T1 (en) | 1998-05-20 | 1999-05-18 | FORMAMIDINESULFIN ACID BLENDS |
DK99109734T DK0959175T3 (en) | 1998-05-20 | 1999-05-18 | Compositions comprising formamidine sulfinic acid |
ARP990102369A AR016490A1 (en) | 1998-05-20 | 1999-05-18 | COMBINED PHAS MIXING AND USE OF THE SAME FOR REDUCING WHITENERS |
CO99030859A CO5040128A1 (en) | 1998-05-20 | 1999-05-19 | FAS COMBINED BLENDS |
AU30148/99A AU748246B2 (en) | 1998-05-20 | 1999-05-19 | Formamidinesulfinic-acid blends II |
CA002272449A CA2272449A1 (en) | 1998-05-20 | 1999-05-19 | Formamidinesulfinic-acid blends ii |
US09/314,008 US6319288B1 (en) | 1998-05-20 | 1999-05-19 | Formamidinesulfinic-acid compositions |
IL13002199A IL130021A (en) | 1998-05-20 | 1999-05-19 | Formamidinesulfinic acid blends, and a method for bleaching paper or textile using them |
IDP990459D ID24130A (en) | 1998-05-20 | 1999-05-19 | ACID-MIXED FORMAMIDINASULFINIC II |
KR1019990017977A KR20000005684A (en) | 1998-05-20 | 1999-05-19 | Formamidinesulfinic-acid blends II |
JP11140066A JP2000026891A (en) | 1998-05-20 | 1999-05-20 | Mixture containing formamidinesulfinic acid and its use |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19822597 | 1998-05-20 | ||
DE19833629A DE19833629A1 (en) | 1998-05-20 | 1998-07-25 | Free-flowing, non-scale forming formamidine-sulfinic acid mixtures for use in reductive bleaches in the paper and textiles industries |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19833629A1 true DE19833629A1 (en) | 1999-11-25 |
Family
ID=7868381
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19833629A Withdrawn DE19833629A1 (en) | 1998-05-20 | 1998-07-25 | Free-flowing, non-scale forming formamidine-sulfinic acid mixtures for use in reductive bleaches in the paper and textiles industries |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE19833629A1 (en) |
ZA (1) | ZA993401B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007007654A1 (en) * | 2007-02-13 | 2008-08-14 | Voith Patent Gmbh | FAS bleach |
-
1998
- 1998-07-25 DE DE19833629A patent/DE19833629A1/en not_active Withdrawn
-
1999
- 1999-05-18 ZA ZA9903401A patent/ZA993401B/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007007654A1 (en) * | 2007-02-13 | 2008-08-14 | Voith Patent Gmbh | FAS bleach |
Also Published As
Publication number | Publication date |
---|---|
ZA993401B (en) | 1999-11-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8127 | New person/name/address of the applicant |
Owner name: DEGUSSA AG, 40474 DUESSELDORF, DE |
|
8127 | New person/name/address of the applicant |
Owner name: WEGO CHEMICAL & MINERAL CORP., GREAT NECK, N.Y., U |
|
8110 | Request for examination paragraph 44 | ||
8130 | Withdrawal |