GB393962A - Method of relieving waste liquors from the soda or sulphate pulp manufacture of silica - Google Patents

Method of relieving waste liquors from the soda or sulphate pulp manufacture of silica

Info

Publication number
GB393962A
GB393962A GB34442/31A GB3444231A GB393962A GB 393962 A GB393962 A GB 393962A GB 34442/31 A GB34442/31 A GB 34442/31A GB 3444231 A GB3444231 A GB 3444231A GB 393962 A GB393962 A GB 393962A
Authority
GB
United Kingdom
Prior art keywords
liquor
hydroxide
calcium
caustic soda
silica
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
Application number
GB34442/31A
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
Publication of GB393962A publication Critical patent/GB393962A/en
Expired legal-status Critical Current

Links

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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye

Landscapes

  • Paper (AREA)

Abstract

In obtaining waste liquors free from silica, when manufacturing cellulose by treating a cellulosic raw material with caustic soda lyes, in the manner claimed in the parent Specification, the hydrooxides or oxides of calcium and/or magnesium, with if desired the hydroxide of aluminium, are employed as precipitants while the alkalinity of the digster liquor is reduced by an amount approximately corresponding to the added quantity of calcium and magnesium oxide and hydroxide. The process may be used when the caustic soda lye also contains sodium sulphide, sodium sulphite, sodium sulphate, contact substances, phenols, or organic oxyacids or the like. The presence of organic oxyacids such as are formed when digesting vegetable substances with caustic soda increases the activity of the calcium hydroxide; waste liquor may therefore be added to the digester liquor. The application of the process to the production of cellulose from wheat or rye straw and esparto grass is described. The aluminium hydroxide may be used in the form of red bauxite. The liquor is also freed from carbon dioxide by the process.
GB34442/31A 1931-09-19 1931-12-11 Method of relieving waste liquors from the soda or sulphate pulp manufacture of silica Expired GB393962A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB26296/31A GB381697A (en) 1931-09-19 1931-09-19 Method of relieving alkaline waste liquors from the soda or sulphate pulp manufacture, of silica
SE393962X 1931-10-26

Publications (1)

Publication Number Publication Date
GB393962A true GB393962A (en) 1933-06-12

Family

ID=32964108

Family Applications (2)

Application Number Title Priority Date Filing Date
GB26296/31A Expired GB381697A (en) 1931-08-22 1931-09-19 Method of relieving alkaline waste liquors from the soda or sulphate pulp manufacture, of silica
GB34442/31A Expired GB393962A (en) 1931-09-19 1931-12-11 Method of relieving waste liquors from the soda or sulphate pulp manufacture of silica

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB26296/31A Expired GB381697A (en) 1931-08-22 1931-09-19 Method of relieving alkaline waste liquors from the soda or sulphate pulp manufacture, of silica

Country Status (1)

Country Link
GB (2) GB381697A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2628155A (en) * 1948-12-20 1953-02-10 Gruen Bengt Herman Emanuel Method for the recovery of spent liquors from the cooking of cellulose from raw material containing silica
DE1046465B (en) * 1956-06-18 1958-12-11 Escher Wyss Gmbh Process for the removal of silica from alkaline pulp waste liquors
DE1076485B (en) * 1958-01-29 1960-02-25 Inst Zellstoff Process for the removal of silica from alkaline cellulose waste liquors rich in silicate, especially in continuous operation
JPS54120295A (en) * 1978-03-13 1979-09-18 Hitachi Metals Ltd Regeneration of waste coustic soda
JPS54120294A (en) * 1978-03-13 1979-09-18 Agency Of Ind Science & Technol Removing method for silicic acid in waste caustic soda

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3190789A (en) * 1960-02-18 1965-06-22 Pittsburgh Piate Glass Company Calcium silicate-filled paper
US4331507A (en) * 1979-12-10 1982-05-25 Dorr-Oliver Incorporated Desilication in alkaline pulp processes
ZA849901B (en) * 1983-12-23 1985-08-28 North Broken Hill Ltd Method of improving the purity of alkali-metal hydroxides
CN102337690B (en) * 2011-10-31 2013-04-10 陕西科技大学 Pulping method for stewing bamboo material by using aluminum salt and retaining silicon at same time
CN102877361A (en) * 2012-09-28 2013-01-16 湖南文理学院 Silicon retention agent for pulping by grass materials and cooking method
EP4153811A4 (en) * 2020-05-22 2024-06-19 Suzano S.A. Methods of treating a kraft process recovery cicle to reduce metal levels at the kraft process

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2628155A (en) * 1948-12-20 1953-02-10 Gruen Bengt Herman Emanuel Method for the recovery of spent liquors from the cooking of cellulose from raw material containing silica
DE1046465B (en) * 1956-06-18 1958-12-11 Escher Wyss Gmbh Process for the removal of silica from alkaline pulp waste liquors
DE1076485B (en) * 1958-01-29 1960-02-25 Inst Zellstoff Process for the removal of silica from alkaline cellulose waste liquors rich in silicate, especially in continuous operation
JPS54120295A (en) * 1978-03-13 1979-09-18 Hitachi Metals Ltd Regeneration of waste coustic soda
JPS54120294A (en) * 1978-03-13 1979-09-18 Agency Of Ind Science & Technol Removing method for silicic acid in waste caustic soda

Also Published As

Publication number Publication date
GB381697A (en) 1932-10-13

Similar Documents

Publication Publication Date Title
GB393962A (en) Method of relieving waste liquors from the soda or sulphate pulp manufacture of silica
US1605927A (en) Sodium-monosulphite waste-liquor-recovery process
US1831032A (en) Production of refined wood pulp
GB448582A (en) Refining cellulose fiber for conversion into cellulose derivatives
US1870650A (en) Chemical modification of cellulose fiber
GB269909A (en) Improvements in or relating to treating residual liquors accruing from the treatment of cellulose material
GB376654A (en) Process for producing alkali metal bisulphite or alkali metal sulphite solutions from waste liquors obtained by digesting pulp with alkali-sulphur compounds
US1867593A (en) Process of chemical fiber liberation
US1917545A (en) Combined acid and alkali process of fiber liberation
US1654603A (en) Process for the production of high alpha-cellulose fiber
US1730383A (en) of berlin
GB583074A (en) Improvements relating to processes for the production of cellulose pulp
SU39534A1 (en) Method for producing kraft cellulose from cereal straw
GB596164A (en) Methods of utilising effluents from the chemical treatment of cellulosic raw material
US1924623A (en) Refinement of cellulose fiber
GB298333A (en) Process for obtaining cellulose from ligno-cellulosic material
GB526399A (en) Improvements in or relating to processes for obtaining cellulose for the manufactureof rayon from resinous pine woods
US1598880A (en) Process of producing chemical wood pulp
US1935579A (en) Two-step chemical process of fiber liberation
GB220025A (en) Improvements in the process of tanning and in the manufacture of tanning substances
GB526636A (en) Process for the production of celluloses by digestion with calcium hydroxide and subsequent treatment with dilute caustic alkalis
GB470764A (en) Improvements in or relating to the manufacture of purified cellulose from cellulose pulps
US1488830A (en) Cooking liquor
GB538185A (en) Improvements relating to the production of cellulose
US1572840A (en) Production of pulp