NL58741C - - Google Patents

Info

Publication number
NL58741C
NL58741C NL58741DA NL58741C NL 58741 C NL58741 C NL 58741C NL 58741D A NL58741D A NL 58741DA NL 58741 C NL58741 C NL 58741C
Authority
NL
Netherlands
Application number
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.)
Publication of NL58741C publication Critical patent/NL58741C/xx
Priority claimed from DEC55954D external-priority patent/DE740833C/en
Priority claimed from DEC56402D external-priority patent/DE742617C/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • D21H17/15—Polycarboxylic acids, e.g. maleic acid
    • 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
    • D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
    • D21C9/083—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with inorganic compounds
    • 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
    • D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
    • D21C9/086—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching with organic compounds or compositions comprising organic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
NL58741D 1940-08-19 NL58741C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEC55954D DE740833C (en) 1940-08-19 1940-08-19 Process for preventing resin precipitation in paper manufacture
DEC56402D DE742617C (en) 1941-03-28 1941-03-28 Process for preventing resin precipitations in paper manufacture

Publications (1)

Publication Number Publication Date
NL58741C true NL58741C (en)

Family

ID=25970490

Family Applications (1)

Application Number Title Priority Date Filing Date
NL58741D NL58741C (en) 1940-08-19

Country Status (3)

Country Link
CH (1) CH226936A (en)
FR (1) FR874759A (en)
NL (1) NL58741C (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB770389A (en) * 1954-06-18 1957-03-20 Kopparfors Ab A method of preventing depositions of pitch from sulphite pulp
GB769849A (en) * 1955-03-09 1957-03-13 Kopparfors Ab A method of preventing depositions of pitch from mechanical pulp and semi-pulp
DE1064801B (en) * 1956-10-26 1959-09-03 Benckiser Gmbh Joh A Process for combating congestion, blockages and slime formation in pipe systems and apparatus, especially in the pulp, wood pulp, paper and cardboard industries
US5221436A (en) * 1988-06-29 1993-06-22 Ecc International Limited Pitch control using clay coated with an inorganic gel
GB8815515D0 (en) * 1988-06-29 1988-08-03 Ecc Int Ltd Pitch control

Also Published As

Publication number Publication date
FR874759A (en) 1942-08-26
CH226936A (en) 1943-05-15

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