US1633736A - Process of preparing paper pulp - Google Patents

Process of preparing paper pulp Download PDF

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Publication number
US1633736A
US1633736A US111368A US11136826A US1633736A US 1633736 A US1633736 A US 1633736A US 111368 A US111368 A US 111368A US 11136826 A US11136826 A US 11136826A US 1633736 A US1633736 A US 1633736A
Authority
US
United States
Prior art keywords
liquor
chips
sulphur
paper pulp
pulp
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
Application number
US111368A
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English (en)
Inventor
Jr Frederick Knapp Fish
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US1633736A publication Critical patent/US1633736A/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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • D21C3/022—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes in presence of S-containing compounds

Definitions

  • the present invention relates to a further development in the art of producing pulp and has for 1ts main object the reduction of the cost of the production of pulp of a therein to remove air standard or improved quality.
  • the chips are charged into the digester' where they are treated with a liquor to which sulphur is added.
  • the liquor is preferably initially charged with volatile and other solvent exwood and the desired chemical reagent. such as soda, caustic potash, lime and the like is added.
  • the sulphur may be dissolved directly in the liquor or it may be previously dissolved in a suitable solvent and then added to the liquor. I have found it satisfactory in some treatments to charge the sulphur directly into the digester prior to or during the period of supplying liquor to the charge. In such cases the sulphur appears to be distributed through the contents o1 the digester to disso ve in the liquor and otherwise act on the chips to effectively treat the same so as to soften. dissolve and remove or distribute the resins, lignin and other constituents which surround the wood fibre so that the cooked charge is in the desired condition for further treatment.
  • the liquor is preferably circulated and sprayed on the chips to assistand hasten the saturation of the chips with the liquor.
  • VVhen'the digester is completely charged a vacuum is produced from the charge and a vacuum of 15 or 20 inches is maintained for tractives of Patent,
  • a process .of producing pulp which consists in cooking chips in a digester with a liquor containing solvent extractives of plant material to which sulphur has been added.
  • a process of makingpulp which conprocess of producing pulp which si-sts in cooking chips in a diester with a liquor initially contamin e emental sul- Ehur, solvent extractives 0 wood and an alali and. utilizing in the cook, products of 'sulphui', chemical reagent which will unite with the sulphur, and added extractives of wood, the sulphur reagent and extractives being free to react with or on the binding constituents of the chips during theprogre'ss of the reactions.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
US111368A 1925-07-07 1926-05-24 Process of preparing paper pulp Expired - Lifetime US1633736A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA1633736X 1925-07-07
CA255030X 1925-07-07

Publications (1)

Publication Number Publication Date
US1633736A true US1633736A (en) 1927-06-28

Family

ID=32963118

Family Applications (1)

Application Number Title Priority Date Filing Date
US111368A Expired - Lifetime US1633736A (en) 1925-07-07 1926-05-24 Process of preparing paper pulp

Country Status (2)

Country Link
US (1) US1633736A (fr)
FR (1) FR617480A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3520773A (en) * 1968-05-17 1970-07-14 Mac Millan Bloedel Ltd Alkaline pulping processes with chemical pretreatment
EP2592186A1 (fr) * 2011-11-08 2013-05-15 Södra Cell AB Procédé de réduction en pâte kraft

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3520773A (en) * 1968-05-17 1970-07-14 Mac Millan Bloedel Ltd Alkaline pulping processes with chemical pretreatment
EP2592186A1 (fr) * 2011-11-08 2013-05-15 Södra Cell AB Procédé de réduction en pâte kraft
WO2013068453A3 (fr) * 2011-11-08 2013-07-18 Södra Cell Ab Procédé de production de pâte kraft

Also Published As

Publication number Publication date
FR617480A (fr) 1927-02-19

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