EP0436062A1 - Bleichen von Textilien mit Sauerstoff und Wasserstoffperoxid - Google Patents

Bleichen von Textilien mit Sauerstoff und Wasserstoffperoxid Download PDF

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Publication number
EP0436062A1
EP0436062A1 EP90100237A EP90100237A EP0436062A1 EP 0436062 A1 EP0436062 A1 EP 0436062A1 EP 90100237 A EP90100237 A EP 90100237A EP 90100237 A EP90100237 A EP 90100237A EP 0436062 A1 EP0436062 A1 EP 0436062A1
Authority
EP
European Patent Office
Prior art keywords
oxygen
hydrogen peroxide
bleaching
peroxide solution
cloth
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.)
Granted
Application number
EP90100237A
Other languages
English (en)
French (fr)
Other versions
EP0436062B1 (de
Inventor
Lawrence Marvin Litz
Thomas John Bergman Jr.
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.)
Praxair Technology Inc
Original Assignee
Praxair Technology Inc
Union Carbide Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Praxair Technology Inc, Union Carbide Corp filed Critical Praxair Technology Inc
Priority to ES90100237T priority Critical patent/ES2050278T3/es
Priority to DE69007267T priority patent/DE69007267T2/de
Priority to CA002007213A priority patent/CA2007213A1/en
Priority to EP90100237A priority patent/EP0436062B1/de
Priority to BR9000179A priority patent/BR9000179A/pt
Publication of EP0436062A1 publication Critical patent/EP0436062A1/de
Application granted granted Critical
Publication of EP0436062B1 publication Critical patent/EP0436062B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • D06L4/15—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen using organic agents
    • 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
    • D06L4/18—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen in a gaseous environment

Definitions

  • the invention relates to the bleaching of textiles. More particularly, it relates to a process for the carrying out of such textile bleaching in an improved, more economical manner than in conventional processing.
  • cloth is first treated with caustic and is then passed into a bleach tank containing a bleaching solution consisting of hydrogen peroxide, water and a stabilizing agent at 37°C.
  • the hydrogen peroxide concentration is typically about 1.5% by weight.
  • the cloth is then passed from the bleach tank through a heater tube in which it is heated to about 90-99°C. It is then folded into a tortuous shape and passed into a well-insulated vessel, referred to as a "J-box" because of its typical shape, wherein the desired contact time is provided between the cloth being bleached and the hydrogen peroxide in the bleaching solution.
  • the residence time in the J-box is typically about 60-90 minutes.
  • the amount of hydrogen peroxide required for textile bleaching is reduced by passing the cloth to be bleached alternately between an aqueous hydrogen peroxide solution and an oxygen-containing head space.
  • the objects of the invention are accomplished by the use of an oxygen bleaching operation, in conjunction with hydrogen peroxide bleaching, to substantially reduce the costs of the overall bleaching operation.
  • the invention not only enables the amount of hydrogen peroxide employed to be reduced significantly, but also requires less processing equipment than that employed in the conventional hydrogen peroxide process.
  • the J-box, the bleach tank and the heater tube of conventional practice are eliminated in favor of a single bleaching vessel in the practice of the invention.
  • the residence times employed in the practice of the invention are generally much lower than those required for conventional hydrogen peroxide textile bleaching.
  • oxygen textile bleaching is used to denote the process in which, in accordance with the practice of the invention, the cloth to be bleached is alternately passed between hydrogen peroxide and an oxygen-containing head space. It will be appreciated that oxygen is much less expensive than hydrogen peroxide, so that the savings in hydrogen peroxide consumption achieved in the practice of the invention renders the oxygen textile bleaching approach more economical to operate than the conventional hydrogen peroxide approach.
  • the cloth to be bleached represented generally by the numeral 1 is passed into and out of a caustic solution-containing vessel 2 through the use of suitable rollers 3, 4 and 5, with the cloth passing below liquid level 6 in said vessel for desired immersion in the caustic solution.
  • Cloth 1 upon such treatment with caustic, is passed through a series of squeeze rollers 7 for partial drying, it being understood that such processing sequence is generally the same as in conventional hydrogen peroxide processing.
  • cloth 1 leaving squeeze rollers 7 in the practice of the oxygen textile bleaching process of the invention is passed to an essentially gas-tight bleaching vessel 8, which contains aqueous hydrogen peroxide solution 9 at a desired concentration and an oxygen-containing gas space 10, with the numeral 11 representing the gas-liquid interface between said oxygen-containing gas space and said aqueous hydrogen peroxide within vessel 8.
  • Cloth 1 being treated enters vessel 8 through a pair of essentially gas-tight rollers 12, or a slit or some other suitable essentially gas-­tight opening in said bleaching vessel 8.
  • cloth 1 passes alternately through a series of rollers 13 and 14.
  • Rollers 13 are positioned so as to pass cloth 1 through oxygen-­containing head space 10 within vessel 8.
  • Rollers 14 are submerged below gas-liquid interface 11 so as to pass cloth 1 through aqueous hydrogen peroxide 9 within vessel 8.
  • cloth 1 is alternately passed between the aqueous hydrogen peroxide solution 9 and oxygen-containing head space 10, with such alternate passing of the cloth through said separate portions of bleaching vessel 8 comprising the oxygen textile bleaching process of the invention.
  • cloth 1 is shown leaving bleaching vessel 8 through essentially gas-tight rollers 15 or other essentially gas-tight opening for passage to a suitable rinse and dry zone 16 before being passed to collection roller 17 for storage and subsequent distribution, processing and use.
  • processing subsequent to treatment of cloth 1 in bleaching vessel 8 will be understood to be essentially as in conventional hydrogen peroxide processing.
  • the cloth in any event for purposes of the invention, should be treated at least once after immersion in a hydrogen peroxide solution.
  • the cloth is passed through the oxygen-containing atmosphere before and after at least one such immersion in the hydrogen peroxide solution. While the illustrated embodiment shows cloth 1 passing initially into oxygen-containing head space 10 before passage into hydrogen peroxide bleaching solution 9, and passing through said oxygen-containing head space 10 for discharge from vessel 8, it will be appreciated that any other inlet and discharge arrangement can be employed so long as the cloth being bleached is subjected to the desired number of alternate contacts with aqueous hydrogen peroxide solution and with the oxygen-­containing head space for a given application.
  • rollers 14 are illustrated as being fully submerged in aqueous hydrogen peroxide of a paramount importance, with the savings in hydrogen peroxide costs, reduction in capital costs and reduced residence times obtainable in the practice of the invention being desired.
  • the alternate processing sequence of the invention may be used to achieve a desirable overall bleaching result more favorable than that obtainable by conventional processing, even though each of the various potential areas of improvement, i.e., hydrogen peroxide savings, capital cost reduction and/or residence time reduction, are not utilized so as to maximize the benefits obtainable in each such area for a given bleaching operation.
  • the cloth processed in the practice of the invention will be understood to include any textile material that can be effectively bleached by the conventional hydrogen peroxide bleaching approach.
  • Other bleaching agents that are sometimes employed, for particular bleaching applications include sodium chlorite, sodium hypochlorite and peracetic acid.
  • the advantage of using hydrogen peroxide over the other known bleaching agents is that hydrogen peroxide does not react with proteins in the fiber of the fabric.
  • the treatment of cottons with bleaching agent solutions usually begins with the rolling of the cloth into a caustic-containing vessel where it is contacted with caustic, typically 4% NaOH, at about 70°C for preliminary desizing purposes. It will be appreciated that, in the bleaching of particular textile materials it may not be necessary to employ such caustic desizing step prior to the actual bleaching step.
  • Residence times of cloth within the bleaching vessel of the invention will range from about 30 to about 90 minutes, depending on the desired extent of bleaching, the textile being bleached, the hydrogen peroxide concentration employed, the liquid level of the hydrogen peroxide and the ratio of the residence time in the hydrogen peroxide solution and in the oxygen-containing head space in each alternate sequence and/or in the overall passage of the cloth being treated through the bleaching vessel.
  • the invention in particular applications, can achieve a significant reduction in residence time as compared to conventional hydrogen peroxide processing.
  • the hydrogen peroxide concentration employed in the practice of the invention can be at the levels employed for conventional hydrogen peroxide bleaching, i.e. typically about 1.5% by weight or more, but are preferably significantly lower depending on the overall factors pertaining to a given application.
  • aqueous hydrogen peroxide solutions having hydrogen peroxide concentrations as low as about 0.1% by weight, or less can be employed in the oxygen textile bleaching process and apparatus of the invention. Concentrations of less than 1.5% and down to about 0.1% are generally preferred.
  • both the hydrogen peroxide and the oxygen-containing gas employed in the bleaching vessel may be heated to from about 70°C to about 100°C, preferably from about 70°C to about 90°C, although temperatures outside this range may also be employed in particular applications.
  • oxygen-containing head space within the bleaching vessel.
  • essentially pure oxygen may be used, and is generally preferred, but air or another suitable oxygen-containing gas may be employed.
  • the gas-tight rollers, or other form of gas-tight openings, at the inlet and discharge end of the bleaching vessel are not necessary, but may be employed to assure against any undesired discharge of vapor from the vessel.
  • Example 1 A laboratory experiment was performed, as in Example 1 above, except that sodium sulfite, at various concentrations, was added to the hydrogen peroxide solution.
  • Sodium sulfite is known to increase the oxidation potential of oxygen.
  • the concentration of sodium sulfite was varied, in a series of comparative tests, from 0% to 2% by weight of the overall solution.
  • the inclusion of sodium sulfite in the bleaching solution was found to improve the cloth's brightness by as much as 33%.
  • sodium sulfite serves to significantly enhance the bleaching performance of the invention.
  • the addition of sodium sulfite to the aqueous bleaching solution was also found to help decrease the overall consumption of hydrogen peroxide during the bleaching operation.
  • sodium sulfite to the hydrogen peroxide solution, as a useful oxidation enhancer.
  • such sulfite may be employed in an amount in the range of from about 0.1% to about 4%, preferably from about 1% to about 3%, by weight based on the weight of the overall hydrogen peroxide solution, although quantities outside this range may also be employed.
  • sulfur dioxide is conveniently employed in an amount within the range of from about 0.1% to about 4%, preferably from about 1% to about 3%, by volume based on the overall volume of the oxygen-containing head space or other oxygen-­containing atmosphere employed in the practice of the invention. It will be understood that quantities outside this range may also be employed, as can combinations of such sodium sulfite and sulfur dioxide, or other oxidation enhancing additives.
  • level of bleaching achieved thereby is generally less than that achievable in the hydrogen peroxide-oxygen-­containing atmosphere sequence of the invention, depending on the operating conditions employed, it will be appreciated that the level of bleaching achievable thereby may be adequate to satisfy the requirements of a particular bleaching operation.
  • the oxygen textile bleaching approach of the invention can result, in practical commercial applications, in at least a 25%, and typically more than 50%, reduction in the amount of hydrogen peroxide employed and consumed.
  • high-purity oxygen for use in the practice of the invention is far less expensive than the additional amount of hydrogen peroxide otherwise required for conventional hydrogen peroxide bleaching, the invention is clearly less costly to operate than the conventional process.
  • the invention represents a further significant advance in the art in another manner arising out of the ability to reduce the amount of hydrogen peroxide requred for suitable bleaching action.
  • a substantial cost associated with bleaching operations is that associated with the spent aqueous hydrogen peroxide removal step.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Detergent Compositions (AREA)
EP90100237A 1990-01-05 1990-01-05 Bleichen von Textilien mit Sauerstoff und Wasserstoffperoxid Expired - Lifetime EP0436062B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES90100237T ES2050278T3 (es) 1990-01-05 1990-01-05 Blanqueo de textiles con oxigeno y peroxido de hidrogeno.
DE69007267T DE69007267T2 (de) 1990-01-05 1990-01-05 Bleichen von Textilien mit Sauerstoff und Wasserstoffperoxid.
CA002007213A CA2007213A1 (en) 1990-01-05 1990-01-05 Oxygen bleaching of textiles
EP90100237A EP0436062B1 (de) 1990-01-05 1990-01-05 Bleichen von Textilien mit Sauerstoff und Wasserstoffperoxid
BR9000179A BR9000179A (pt) 1990-01-05 1990-01-17 Processo para alvejamento textil com peroxido de hidrogenio e processo aperfeicoado para o alvejamento de texteis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90100237A EP0436062B1 (de) 1990-01-05 1990-01-05 Bleichen von Textilien mit Sauerstoff und Wasserstoffperoxid

Publications (2)

Publication Number Publication Date
EP0436062A1 true EP0436062A1 (de) 1991-07-10
EP0436062B1 EP0436062B1 (de) 1994-03-09

Family

ID=8203465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100237A Expired - Lifetime EP0436062B1 (de) 1990-01-05 1990-01-05 Bleichen von Textilien mit Sauerstoff und Wasserstoffperoxid

Country Status (3)

Country Link
EP (1) EP0436062B1 (de)
DE (1) DE69007267T2 (de)
ES (1) ES2050278T3 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000039264A1 (en) * 1998-12-23 2000-07-06 Unilever Plc Bleaching with polyoxometalates and air or molecular oxygen
WO2001064827A1 (en) * 2000-03-01 2001-09-07 Unilever Plc Composition and method for bleaching a substrate
CN114525637A (zh) * 2022-02-24 2022-05-24 苏州赛文纺织科技有限公司 一种纺织生产用原料漂白装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR581300A (fr) * 1923-07-19 1924-11-26 Roessler & Hasslacher Chemical Procédé de fabrication d'articles à l'aide de tissus
EP0087553A1 (de) * 1982-02-27 1983-09-07 Degussa Aktiengesellschaft Verfahren zur Herstellung von halbgebleichten Zellstoffen
WO1989005881A1 (en) * 1987-12-21 1989-06-29 Aga Aktiebolag A method of bleaching cotton

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR581300A (fr) * 1923-07-19 1924-11-26 Roessler & Hasslacher Chemical Procédé de fabrication d'articles à l'aide de tissus
EP0087553A1 (de) * 1982-02-27 1983-09-07 Degussa Aktiengesellschaft Verfahren zur Herstellung von halbgebleichten Zellstoffen
WO1989005881A1 (en) * 1987-12-21 1989-06-29 Aga Aktiebolag A method of bleaching cotton

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000039264A1 (en) * 1998-12-23 2000-07-06 Unilever Plc Bleaching with polyoxometalates and air or molecular oxygen
WO2001064827A1 (en) * 2000-03-01 2001-09-07 Unilever Plc Composition and method for bleaching a substrate
US6638901B2 (en) 2000-03-01 2003-10-28 Unilever Home & Personal Care Usa, Division Of Conopco, Inc. Composition and method for bleaching a substrate
AU2001250319B2 (en) * 2000-03-01 2004-06-24 Unilever Plc Composition and method for bleaching a substrate
US7049278B2 (en) 2000-03-01 2006-05-23 Unilever Home And Personal Care Usa Division Of Conopco, Inc. Composition and method for bleaching a substrate
CN114525637A (zh) * 2022-02-24 2022-05-24 苏州赛文纺织科技有限公司 一种纺织生产用原料漂白装置
CN114525637B (zh) * 2022-02-24 2024-03-08 王海彬 一种纺织生产用原料漂白装置

Also Published As

Publication number Publication date
ES2050278T3 (es) 1994-05-16
DE69007267D1 (de) 1994-04-14
EP0436062B1 (de) 1994-03-09
DE69007267T2 (de) 1994-06-16

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