Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01C—CHEMICAL OR BIOLOGICAL TREATMENT OF NATURAL FILAMENTARY OR FIBROUS MATERIAL TO OBTAIN FILAMENTS OR FIBRES FOR SPINNING; CARBONISING RAGS TO RECOVER ANIMAL FIBRES
  • D01C3/00—Treatment of animal material, e.g. chemical scouring of wool
• • C—CHEMISTRY; METALLURGY
  • C14—SKINS; HIDES; PELTS; LEATHER
  • C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
  • C14C1/00—Chemical treatment prior to tanning
  • C14C1/06—Facilitating unhairing, e.g. by painting, by liming

Definitions

• My invention relates-to carroting animal hair and wool that is to say to preparlng these materials for felting.
• the ordinary and universally practiced method for carroting animal hair consists in treating the same with an aqueous solution of mercury nitrate and nitric acid. 4
• the object of my invention is to provide a process for carroting animal hair and wool which entirely avoids the use of mercury and permits to use solutions of a comparatively low concentration.
• oxygen conveyors which facilitate the transfer of oxygen from the oxidizing agent to the animal hair and wool.
• suitable oxygen conveyors are salts soluble in ,water of metals capable of forminga plurality of oxygen compounds or oxides, the lower oxides being the more stable ones while being readily oxidizable by oxidizing agents.
• Such salts are those of silver, copper, lead, zirconium, bismuth, manganese, nickel, cobalt, iron, cadmium, cerium, chromium,
• oxidizing agents I may use any oxygen carriers and the oxygen acids and salts of oxygen acids of the metals of the chromium group soluble in Water that is to say any compounds rich in and readily parting with oxygen.
• oxygen carriers are peroxide of hydrogen, the oxygen acids of halogens, persulphuric acid, Caros acid or the salts of such acidsin aeidulated solutions, or mixtures of the said substances.
• oxygen conveyors to be used to the greatest advantage 1n anypartlcular case depend on the nature of the oxygen carrier. used.
• oxygen conveyors of comparatively low re- .activeness are preferably used such as salts of copper, cobalt, nickel, iron, lead, silver,
• oxygen carrier used is of comparatively lower reactiveness or partsless readily with its oxygen, such as chlora-tes or persulphates
• an oxygen carrier of a comparatively higher reactiveness has to be used such agents, I use sulphuric acid, or nitric acid;
• the concentrations of the solutions used are so low that they have no detrnnental action on the hair or Wool.
• Emdmplcs 1. To hair and wool on the skin is applied a mixture of an aqueous solution containing 6 to 10% by Weight of peroxide of hydrogen serving as an oxygen carrier and 1 to 2% of bismuth, cobalt or cerium 1n the form of a saltsoluble in water by spraying or brushing or in any other known or preferred manner. The skins are then dried at a temperature of to 100 cent-igrade. The hair and Wool will'bc found to be thoroughly carroted and may then be further worked in the well knoWn manner.
• Example 2 To hair or wool on the skin is applied, as in Example 1, an aqueous solution containing 5 to 10%.by Weight of nitric acid 3 to 5% of peroxide of hydrogen and 1 to 2% of silver, lead, zirconium, bismuth, manganese, nickel, cobalt, iron, cadmium or cerium, in the form of a salt soluble in water, the said salts acting as oxygen conveyors while the peroxide of hydrogen acts as an oxygen carrier, and the nitric acid as an acidulating agent.
• the further treatment is the same as in Example 1.
• Example 5 To hair or Wool on the skin is applied, as in Example 1, an aqueous solution containing 4% by weight of ammonium persulphate, 2% sulphuric acid and 1% of chromium hair or vwool on the skin is applied,
• Example 1 The further treatment is the same as in Example 1.
• Example 6 To hair or wool on the skin is applied of chromium in the form of chromic acid or of a bichromate. The further treatment is the same as in Example 1.
• an aqueous solution contain ing 3% by weight of ammonium persulphate 2% of sulphuric acid and 0.4% of chromium in the form of chromic acid or a bichromate.
• Examples 4 to 8 the potassium chlorate and ammonium persulphate act as oxygen carriers, the chromic acid bichromate and the chromium alum act as oxy enconveyors and the sulphuric and nitric acid act as acidulating agents.
• the above described process is also applicable to hair or wool cut from the skin but in this case the concentrations above indicated will have to be notably reduced, say to one quarter or one tenth of those above given, according to the degree of concentration 'of the liquid remaining on the hair or wool after removal of the excess of liquid and according to the nature of the hair and wool treated.
• the step comprlslng the application to the hair and wool of an aqueous solution of an oxygen carrier and of an oxygen conveyor and of nitric acid.
• ste comprising the application to the hair an' wool of an aqueous solution of an oxygen carrier and of, an oxygen conveyor, such oxygen conveyor consisting of a tungstate soluble in water, the oxygen carrier consisting of peroxide of hydrogen and an acidu latmg agent.
• the step comprising the application to the hair and Wool of an aqueous solution of an oxygen carrier and of an oxygen conveyor, such oxygen conveyor consisting of a tungstate soluble in Water,- the oxygen carrier consisting of peroxide of hydrogen and nitric acid actin as an acid-ulating agent.

Landscapes

• Chemical & Material Sciences (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Wood Science & Technology (AREA)
• Health & Medical Sciences (AREA)
• Molecular Biology (AREA)
• Animal Husbandry (AREA)
• Zoology (AREA)
• Textile Engineering (AREA)
• Organic Chemistry (AREA)
• Cosmetics (AREA)
• Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=3670818

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (2)

• 1927
  • 1927-02-26 DE DEB129963D patent/DE527012C/de not_active Expired
• 1928
  • 1928-01-06 US US245058A patent/US1710565A/en not_active Expired - Lifetime
  • 1928-01-21 GB GB2014/28A patent/GB285028A/en not_active Expired
  • 1928-01-25 CH CH142420D patent/CH142420A/de unknown
  • 1928-01-30 FR FR649772D patent/FR649772A/fr not_active Expired

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