US2048991A - Process for bleaching fibrous material - Google Patents

Process for bleaching fibrous material Download PDF

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Publication number
US2048991A
US2048991A US677164A US67716433A US2048991A US 2048991 A US2048991 A US 2048991A US 677164 A US677164 A US 677164A US 67716433 A US67716433 A US 67716433A US 2048991 A US2048991 A US 2048991A
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US
United States
Prior art keywords
bleaching
fibers
chlorine
bath
peroxide
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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US677164A
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English (en)
Inventor
Butz Karl
Deuschle Gustav
Simon Gunther
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H Th Bohme AG
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H Th Bohme AG
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Filing date
Publication date
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Publication of US2048991A publication Critical patent/US2048991A/en
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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
    • D06L4/70—Multi-step processes

Definitions

  • This invention relates to processes for the bleaching of textile material and is particularly applicable to the treatment of vegetable fibers. It is the principal object of the invention to provide a bleaching process which may be simply and quickly carried out, and which is less expensive and which enhances the desirable qualities of. the material to a greater extent than processes heretofore employed.
  • the material to be bleached is preferably first wetted with a suitable wetting or dispersing agent such as a highl sulphonated oil or the like and is then impr e gmmmorine bleaching solution for a short period of time sufficient only to enable the fibers to completely absorb the solution.
  • a suitable wetting or dispersing agent such as a highl sulphonated oil or the like
  • impr e gmmmorine bleaching solution for a short period of time sufficient only to enable the fibers to completely absorb the solution.
  • the impregnated fibrous material is then subjected to the action of an alkaline oxidizing agent such as a peroxide bath.
  • the process may be carried. out in the following manner.
  • Example I 25 350 kg. of raw woven Egyptian yarn are first soaked in a bath containing about 1.5 kg. of highly sulphonated castor oil in 500 liters of water at a temperature of. 50 C., the yarn being thereafter impregnated with asoda-chlorine bleaching solution of about 4 g. active chlorine per liter, sufficient solution being used to provide about 3 kg. of active chlorine. The solution is applied to the material only for a length of time sufficient to effect complete impregnation of the fibers, and the material is then squeezed out and without intermediate treatment is placed in a bleaching vat which is supplied with a peroxide bleaching bath of the following composition:
  • Example III 1700 kgs. of heavy Egyptian damask are singed as usual undressed by means of a ferment and. under addition of a wetting agent, rinsed and thereupon impregnated at 30 with a strong alkaline hypochlorite liquor, containing 6-8 grams of active chlorine per liter. Then the goods are soaked, without being rinsed, with a peroxide liquor as follows:
  • the bleaching liquor consists of Water liters Sodium silicate solution of 36 B do Barium-salt of highly sulphonated oleic alcohol kg 1.7 Sodium peroxidedo 8 Hydrogen peroxide solution 40 liters 16 Within five hours the solution is slowly heated up to 90 by means of steam-pipes and under circulation, and the goods are kept in the liquor during the night. After finishing the bleaching, the peroxide contained in the liquor is not totally spent in most cases. It is advisable to add the missing chemicals to the bleaching liquor for another use.
  • the bleached goods are washed and thereupon finished as usual.
  • This method of working the very difficult bleaching of Egyptian tissue is performed without treatment under pressure within two days, while four days at least were necessary before.
  • the material is subjected to a preliminary treatment with a wetting agent in order to facilitate penetration of the fibers by the bleaching agent.
  • a wetting agent Various other types may be employed, the following agents being found satisfactory: dodecylalcohol, sulphuric ester, sulphated oleic acid amide, sulphated ricinoleic acid anilide, sulphated linoleic acid methyl ester.
  • wetting agents derived from fatty materials by sulphation or sulphonation processes such as sulphonic acids and sulphuric acid esters of oils, fats, and higher fatty alcohols, which may be described for convenience as sulphuric derivatives of fatty materials.
  • any of the conventional agents containing available chlorine such as are commonly used in the treatment of plant fibers are satisfactory; thus, we may use an alkaline chlorine bath such as a calcium chloride or oxychloride solution or the like, such compounds being referred to for convenience hereinafter as chlorine bleaching solutions.
  • alkaline' oxidizing bath is intended to cover any alkaline solution suitable for use with fibrous materials and capable of liberating oxygen.
  • the following compounds may be successfully employed for this purpose in lieu of the hydrogen peroxide and sodium peroxide mentioned in the foregoing examples: sodium perborate, sodium percarbonate, sodium perpyrophosphate and other persalts.
  • these salts exhibit the property, even in the presence of very high alkali concentration and high temperature of the bleaching bath, of efficiently stabilizing the peroxide and at the same time reducing the surface tension of the bleaching bath to a minimum, thus ensuring effective and rapid bleaching of large areas.
  • the mixing of these salts with the bath also maintains the latter in a. clear condition so that precipitates tending to harden the fibrous materials are excluded. B'y proceeding in this manner a. bleaching effect superior to that obtained by earlier methods can be secured without loss of oxygen.
  • the present invention is applicable to the bleaching of plant fibers in all stages of preparation, for example in the form of loose material, carded bands, yarn in skeins or on spools, or woven and twisted goods of all kinds.
  • a process for bleaching textile material of vegetable origin which comprises immersing the material in an alkaline chlorine bleaching solution for a period not appreciably longer than that required for penetration of the fibers of the material, and thereafter soaking the material in a peroxide bath.
  • ifk process for bleaching fibrous material of vegetable origin which comprises the steps of iON OF TEXTELES KEEP ZS,
  • MoDlFL treating the material with a wetting agent, impregnating the fibers with an alkaline chlorine bleaching solution for a period not appreciably longer than that required for penetration of the fibers of the material, and immediately thereafter immersing the material in an oxidizing bath.
  • a process for bleaching fibrous material of vegetable origin which comprises the steps of treating the material with a wetting agent including a sulphuric acid derivative"offatty'material, impregnating the fibers with an alkaline chlorine bleaching solution for a period not appreciably longer than that required for penetration of the fibers of the material, and immediately thereafter immersing the material in an oxidizing bath.
  • a process for bleaching fibrous material of vegetable origin which comprises the steps of treating the material with a wetting agent comprising a sulphuric acid ester-oflawfattynacidalkyl ester, impregnating the fibers with an alkaline chlorine bleaching solution for a period not appreciably longer than that required for penetration of the fibers of the material, and immediately thereafter immersing the material in an oxidizing bath.
  • a process for bleaching fibrous material of vegetable origin which comprises the steps of treating the material with a wetting agent comprising sulphonated castor oil,impregnating the fibers with an alkaline chlorine bleaching solu- HUME Milli smug longer than that required for penetration of the fibers of the material, and immediately thereafter immersing the material in a bath including a peroxide and an earth alkali salt of a sulphuric derivative of fatty material.
  • a process for bleaching fibrous material of vegetable origin which comprises the steps of treating the material with a I h impregnating the fibers with an alkaline chlorine bleaching solution for a period not appreciably longer than that required for penetration of the fibers of the material, and immediately thereafter immersing the material in a bath including a peroxide and an earth alkali salt of a sulphuric derivative of a high molecular fatty alcohol.
  • a process for bleaching fibrous material of vegetable origin which comprises the steps of treating the material with a wetting agent, impregnating the fibers with an n'ephlorine bleaching solution for a period not appreciably longer than that required for penetration of the fibers of the material, and immediately thereafter immersing the material in a bath including a peroxide and an earth alkali salt of a. sulphuric derivative of a fatty acid alkyl ester.
  • a process for bleaching fibrous material of vegetable origin which comprises the steps of treating the material with a wetting agent, impregnating the fibers with an al'kalirie'bhlorine bleaching solution for a period not appreciably longer than that required for penetration of the fibers of the material, and immediately thereafter immersing the material in an oxidizing bath including a peroxide and a mixture of the magnesium salts of a high molecular fatty alcohol GUNTHER SIMON.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Detergent Compositions (AREA)
US677164A 1932-06-29 1933-06-22 Process for bleaching fibrous material Expired - Lifetime US2048991A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE401199X 1932-06-29

Publications (1)

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US2048991A true US2048991A (en) 1936-07-28

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Application Number Title Priority Date Filing Date
US677164A Expired - Lifetime US2048991A (en) 1932-06-29 1933-06-22 Process for bleaching fibrous material

Country Status (4)

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US (1) US2048991A (enrdf_load_stackoverflow)
FR (1) FR755637A (enrdf_load_stackoverflow)
GB (1) GB401199A (enrdf_load_stackoverflow)
NL (1) NL37451C (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2903327A (en) * 1957-07-03 1959-09-08 Allied Chem Naoci-h2o2 cotton cloth bleaching
US3056645A (en) * 1959-10-09 1962-10-02 Pittsburgh Plate Glass Co Process of bleaching sized cotton fabrics
US3077372A (en) * 1959-12-24 1963-02-12 Pennsalt Chemicals Corp Sodium hydroxide and chlorine for in situ hypochlorite formation in pretreatment of cotton in peroxidic bleaching
US3265462A (en) * 1962-10-12 1966-08-09 Allied Chem High-speed two-stage bleaching of cotton cloth

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2903327A (en) * 1957-07-03 1959-09-08 Allied Chem Naoci-h2o2 cotton cloth bleaching
US3056645A (en) * 1959-10-09 1962-10-02 Pittsburgh Plate Glass Co Process of bleaching sized cotton fabrics
US3077372A (en) * 1959-12-24 1963-02-12 Pennsalt Chemicals Corp Sodium hydroxide and chlorine for in situ hypochlorite formation in pretreatment of cotton in peroxidic bleaching
US3265462A (en) * 1962-10-12 1966-08-09 Allied Chem High-speed two-stage bleaching of cotton cloth

Also Published As

Publication number Publication date
FR755637A (fr) 1933-11-28
GB401199A (en) 1933-11-09
NL37451C (enrdf_load_stackoverflow)

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