US3003910A - Peroxidic bleach containing silicic acid ester - Google Patents

Peroxidic bleach containing silicic acid ester Download PDF

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Publication number
US3003910A
US3003910A US816369A US81636959A US3003910A US 3003910 A US3003910 A US 3003910A US 816369 A US816369 A US 816369A US 81636959 A US81636959 A US 81636959A US 3003910 A US3003910 A US 3003910A
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United States
Prior art keywords
silicic acid
bleaching
acid ester
peroxidic
bath
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.)
Expired - Lifetime
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US816369A
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English (en)
Inventor
Dithmar Karl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
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Filing date
Publication date
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Publication of US3003910A publication Critical patent/US3003910A/en
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Classifications

    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • 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
    • D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
    • D06L4/12—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen combined with specific additives

Definitions

  • the present invention relates to a method of stabilizing the active oxygen content of textile bleaching baths.
  • the object of this invention to provide a chemical stabilizer which will regulate the decomposition of peroxide compounds in textile bleaching baths.
  • Another object of this invention is to provide such a stabilizer which is unaffected by the presence of heavy metals or heavy metal compounds in the bleaching bath.
  • Another object of this invention is to provide a stabilizer, the presence of which will not have a detrimental efiect on the materials .to be bleached.
  • organic stabilizers which contain calcium or magnesium combined in organic salt formers oncomplexes
  • the bleaching baths can also be adequately stabilized.
  • the use of these organic stabilizers also entails disadvantages, in that their eiiectiveness is curtailed by the presence of small amounts of heavy metals or heavy metal compounds contained in the fibers. When these metals or compounds are present the decomposition of the peroxides is catalytically accelerated, and because of this a localized overbleaching of the fibers can readily occur which effects their value and use.
  • the old type silicate stabilizers have been used mainly with concentrated and alkaline peroxide baths. As was noted above, however, these stabilizers have their drawbacks, in that they cause turbidity in the bath as the bath cools off and consequently the silicate may deposit on the fibers.
  • the slow decomposition of the silicic acid ester avoids turbidity in the bath as well as a deposition of silicates on the fibers or textiles.
  • alkoxysilanes can be used with excellent results as the silicic acid esters. These alkoxysilanes are soluble in water and exhibit excellent stabilizing charack teristics.
  • Typical al'koxysilane's for example, are tetrakis- (2 methoxy ethoxy) silane, methyl-tris 2 methoxyethoxy) silane and dimethyl-bis (2-methoxy-ethoxy)- silane.
  • the stabilizing effect of the silicic acid esters can be increased if, in addition, water soluble alkali metal salts or particularly water soluble alkaline earth metal salts, such as salts of magnesium or of calcium, are added to the bleaching baths.
  • the treatment of the textiles and fibers in the presence of silicic acid esters is preferably conducted in an alkaline medium, for example, at a pH between 7.5 and 11.5.
  • an alkaline medium for example, at a pH between 7.5 and 11.5.
  • the usual buffering salts such as phosphates and the like, can be employed.
  • the bleaching operation is COlldllCtedJfit temperatures over 60 C., preferably between C. and C.
  • the usual chemical textile aids can be used in the bleaching bath according to the process of this invention, such as the sodium salt of dodecyl sulfate, oxyethylated fatty alcohols with 12 to 16 C-atorns or the condensation products of proteins with aliphatic acids.
  • Solution I contained no other additives but solution II contained sodium silicate and solution III contained tetrakis-(Z-methoxy-ethoxy)- silane, each in such quantities that the SiO content of solutions 11 and HI each amounted to 0.334 g./liter. In all solutions the pH was adjusted to 9.0.
  • the cotton fabric was rinsed and dried in the usual manner.
  • the whiteness content of the treated cotton fabric was found to be 84% of the MgO reference plate of a Zeiss-Elrepho whiteness meter.
  • the untreated cotton fabric had a whiteness content of 54% when similarly tested.
  • Example 2 45 kg. of a fabric made of Nylon 6, which was-previously thermofixed at 182 C. and desized, was treated in a jigger for 2 hours at 100 C. with 300 liters of a bleaching bath containing After this treatment the fabric was twice rinsed with warm water and once with cold water and dried in the usual manner.
  • the whiteness of the treated fabric was found to be 81% of the MgO reference plate of a Zeiss- Elrepho whiteness meter.
  • the active oxygen content of the bleaching bath in the example which initially amounted to 1.5 g./liter was lowered to 0.33 g./liter due to the bleaching operation.
  • the silicic acid esters according to the invention are hydrolysable when added to an alkaline reacting solution.
  • a process for bleaching cellulose, wood pulp, natural and synthetic fibers in an aqueous medium containing a peroxidic bleaching compound the step which comprises incorporating an at least partially water soluble, hydrolyzable, silicic acid ester in the aqueous medium employed for such bleaching to maintain a quantity of silicic acid ester of 1 to 30 g. per liter in said aqueous medium.
  • An aqueous bleaching bath containing a peroxidic bleaching compound and an efiective amount of an at least partially water soluble, hydrolyzable, silicic acid ester to act as a stabilizer for said peroxidic bleaching com pound.
  • a bleaching bath as in claim 9 further comprising water soluble salts selected from the group consisting of alkali metal salts and alkaline earth metal salts.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
US816369A 1958-05-29 1959-05-28 Peroxidic bleach containing silicic acid ester Expired - Lifetime US3003910A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED28208A DE1083221B (de) 1958-05-29 1958-05-29 Verfahren zum Bleichen von natuerlichen oder synthetischen Fasern und Textilien sowie Zellstoff und Holzschliff mit waessrigen peroxydhaltigen Behandlungsbaedern

Publications (1)

Publication Number Publication Date
US3003910A true US3003910A (en) 1961-10-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US816369A Expired - Lifetime US3003910A (en) 1958-05-29 1959-05-28 Peroxidic bleach containing silicic acid ester

Country Status (6)

Country Link
US (1) US3003910A (en, 2012)
CH (1) CH368463A (en, 2012)
DE (1) DE1083221B (en, 2012)
FR (1) FR1225313A (en, 2012)
GB (1) GB890300A (en, 2012)
NL (1) NL97796C (en, 2012)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056713A (en) * 1952-02-09 1962-10-02 Fmc Corp Process for the regeneration of waste paper
US3130165A (en) * 1961-08-31 1964-04-21 Procter & Gamble Inorganic peroxy-compounds containing organic activators
US3131991A (en) * 1960-07-07 1964-05-05 Henkel & Cie Gmbh Washing and bleaching
US3156654A (en) * 1961-06-19 1964-11-10 Shell Oil Co Bleaching
US3379493A (en) * 1963-07-06 1968-04-23 Degussa Activated inorganic bleaches
US3462344A (en) * 1966-05-31 1969-08-19 Fmc Corp Superbleaching of wood pulps
US3769152A (en) * 1970-05-13 1973-10-30 Mo Och Domsjoe Ab Digestion of wood with oxygen in the presence of alkali
US3951594A (en) * 1972-11-27 1976-04-20 Pennwalt Corporation Hydrogen peroxide bleaching solutions and process
FR2557605A1 (fr) * 1983-12-29 1985-07-05 Atochem Procede de blanchiment de pates papetieres par le peroxyde d'hydrogene

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT402827B (de) * 1995-12-22 1997-09-25 Chemiefaser Lenzing Ag Celluloseformkörper und verfahren zu seiner herstellung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US988874A (en) * 1909-12-02 1911-04-04 Hugo Henkel Process for removing printers' ink from printed paper by means of bleaching substances having an alkaline action.
US2097517A (en) * 1932-11-23 1937-11-02 Monsanto Chemicals Soluble hypochlorite composition
US2185632A (en) * 1937-04-12 1940-01-02 Ici Ltd Bleaching surfaces without immersion
US2559342A (en) * 1949-07-26 1951-07-03 Gen Electric Organo-silicon compositions

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US988874A (en) * 1909-12-02 1911-04-04 Hugo Henkel Process for removing printers' ink from printed paper by means of bleaching substances having an alkaline action.
US2097517A (en) * 1932-11-23 1937-11-02 Monsanto Chemicals Soluble hypochlorite composition
US2185632A (en) * 1937-04-12 1940-01-02 Ici Ltd Bleaching surfaces without immersion
US2559342A (en) * 1949-07-26 1951-07-03 Gen Electric Organo-silicon compositions

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3056713A (en) * 1952-02-09 1962-10-02 Fmc Corp Process for the regeneration of waste paper
US3131991A (en) * 1960-07-07 1964-05-05 Henkel & Cie Gmbh Washing and bleaching
US3156654A (en) * 1961-06-19 1964-11-10 Shell Oil Co Bleaching
US3130165A (en) * 1961-08-31 1964-04-21 Procter & Gamble Inorganic peroxy-compounds containing organic activators
US3379493A (en) * 1963-07-06 1968-04-23 Degussa Activated inorganic bleaches
US3462344A (en) * 1966-05-31 1969-08-19 Fmc Corp Superbleaching of wood pulps
US3769152A (en) * 1970-05-13 1973-10-30 Mo Och Domsjoe Ab Digestion of wood with oxygen in the presence of alkali
US3951594A (en) * 1972-11-27 1976-04-20 Pennwalt Corporation Hydrogen peroxide bleaching solutions and process
FR2557605A1 (fr) * 1983-12-29 1985-07-05 Atochem Procede de blanchiment de pates papetieres par le peroxyde d'hydrogene
EP0148712A1 (fr) * 1983-12-29 1985-07-17 Elf Atochem S.A. Procédé de blanchiment de pâtes papetières par le peroxyde d'hydrogène

Also Published As

Publication number Publication date
CH368463A (de) 1963-05-31
GB890300A (en) 1962-02-28
FR1225313A (fr) 1960-06-30
NL97796C (en, 2012)
DE1083221B (de) 1960-06-15
CH7325059A4 (en, 2012) 1962-12-29

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