US1846093A - Method of treating fibers for paper-making and other uses - Google Patents

Method of treating fibers for paper-making and other uses Download PDF

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Publication number
US1846093A
US1846093A US518021A US51802131A US1846093A US 1846093 A US1846093 A US 1846093A US 518021 A US518021 A US 518021A US 51802131 A US51802131 A US 51802131A US 1846093 A US1846093 A US 1846093A
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United States
Prior art keywords
fibers
solution
digester
pressure
treating
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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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US518021A
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English (en)
Inventor
Logan A Dils
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.)
Kellogg Dils Inc
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Kellogg Dils Inc
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
Priority to BE380316D priority Critical patent/BE380316A/xx
Application filed by Kellogg Dils Inc filed Critical Kellogg Dils Inc
Priority to US518021A priority patent/US1846093A/en
Application granted granted Critical
Publication of US1846093A publication Critical patent/US1846093A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
    • D21C9/1094—Bleaching ; Apparatus therefor with reducing compounds with H2

Definitions

  • the fibers When the fibers are overcooked, they are converted into oxy-cellulose unsuitable for paper-making, whereas, when properly cooked, they constitute a true cellulose highly valuable for paper-making and other purposes.
  • some of the fibers areovercooked and reduced to oXy-cellulose, while others, prop- The two (o'xy-cellulose and true cellulose) are frequently so intermingled that they cannot be This results in a deterioration of the whole to the extent of the amount of the undesirable oxy-cellulose present.
  • One of the objects of the present invention is to overcome the objections due to oxycellulose, whether alone or mixed with true cellulose.
  • a further object is to improve the character of the cellulose fibers themselves.
  • a further object, therefore, of the present invention is to provide a method whereby woody fibers may be bleached by the use of chlorine gas or its equivalent without weakening the fibers, and whereby the shrinkage, above indicated, may be largely decreased.
  • cooked fibers oxy-cellulose, or true cellulose with more or less oxy-cellulose mixed therewith
  • a digester in the presence Application filed February 24, 1931.
  • a catalytic agent such as nickel and zinc sulphates dissolved in water.
  • the fibers are treated in the digester until they are thoroughly impregnated with the catalytic solution.
  • Said impregnation may be secured either at atmospheric pressure or above atmospheric pressure. If the impregnation is to occur above atmospheric pressure, the digester is closed and the pressure therein raised to, say 100 pounds, and maintained until the fibers are thoroughly impregnated with the catalytic solution. If the pressure within the digester is raised by the application of heat thereto, steam will be formed in the digester, and after the fibers are thoroughly impregnated with the catalytic solution the pressure and steam in the digester is released, as by a suitable blow-out valve, or otherwise.
  • a catalytic agent such as nickel and zinc sulphates dissolved in water.
  • the introduction of the hydrogen gas into the digester may be efiected either at atmospheric pressure or withthe pressure in the digester raised a few pounds (say from 5 to 10 pounds) above atmospheric pressure.
  • the more beneficial results are secured when the hydrogen gas in introduced under such presscribed, it will be found that they are of quality superior to that of the same fibers without such treatment, and it will be found that even when approximately pure oxy-cellulose fibers (that is fibers so far overcooked that the entire mass is free or nearly free of true cellulose) have been so treated they can be used for making paper of approximately the same quality as that obtained from the treated true cellulose fibers, and of a quality superior to that obtained through a mixture of true cellulose and oxy-cellulose fibers that have not been so treated.
  • Fibers treated according to the foregoing description will not be bleached.
  • a small quantity of sodium perborate is added to the catalytic solution, the fibers placed therein and chlorine gas or its equivalent is then introduced into the catalytic solution with the fibers therein beforethe introductionof the hydrogen gas, and after a short interval of time,
  • the hydrogen gas is then introduced. It will be found in this case that the fibers not only have their quality as paper-making fibers -very decidedly increased, but that they will be bleachedto a clear white.
  • the rocess of, treating woody fibers which consists in dissolving a catalytic agent and alike amountbf sodium perborate in water, immersing the fibers in the solution in a closed digester, and then applying heat to raise the pressure in the digester, then shutting off the heat, then releasing the steam and pressure from the digester, then introducing a carrier for the catalytic agent, adding watereat a temperature to bring the temperature of the mass in the digester to 225? F. and

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Paper (AREA)
US518021A 1931-02-24 1931-02-24 Method of treating fibers for paper-making and other uses Expired - Lifetime US1846093A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE380316D BE380316A (enrdf_load_html_response) 1931-02-24
US518021A US1846093A (en) 1931-02-24 1931-02-24 Method of treating fibers for paper-making and other uses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US518021A US1846093A (en) 1931-02-24 1931-02-24 Method of treating fibers for paper-making and other uses

Publications (1)

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US1846093A true US1846093A (en) 1932-02-23

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US518021A Expired - Lifetime US1846093A (en) 1931-02-24 1931-02-24 Method of treating fibers for paper-making and other uses

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BE (1) BE380316A (enrdf_load_html_response)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5522967A (en) * 1994-05-27 1996-06-04 Kimberly-Clark Corporation Sulfonated cellulose and method of preparation
US5703225A (en) * 1995-12-13 1997-12-30 Kimberly-Clark Worldwide, Inc. Sulfonated cellulose having improved absorbent properties

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5522967A (en) * 1994-05-27 1996-06-04 Kimberly-Clark Corporation Sulfonated cellulose and method of preparation
US5703225A (en) * 1995-12-13 1997-12-30 Kimberly-Clark Worldwide, Inc. Sulfonated cellulose having improved absorbent properties

Also Published As

Publication number Publication date
BE380316A (enrdf_load_html_response)

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