GB360637A - Improvements in and relating to cellulose compositions - Google Patents

Improvements in and relating to cellulose compositions

Info

Publication number
GB360637A
GB360637A GB31734/30A GB3173430A GB360637A GB 360637 A GB360637 A GB 360637A GB 31734/30 A GB31734/30 A GB 31734/30A GB 3173430 A GB3173430 A GB 3173430A GB 360637 A GB360637 A GB 360637A
Authority
GB
United Kingdom
Prior art keywords
lbs
pressure
sawdust
resins
washed
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
GB31734/30A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB360637A publication Critical patent/GB360637A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
    • C08H8/00—Macromolecular compounds derived from lignocellulosic materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Wood Science & Technology (AREA)
  • Biochemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

Cellulosic materials such as cornstalks, sawdust, bagasse, are disintegrated, digested with alkali, acidified to precipitate resins &c. on the fibres, washed to remove soluble bye-products, dried, powdered, mixed with an alkaline substance such as calcium hydroxide, and moulded under heat and pressure. According to an example, 6 lbs. of sawdust, 2 lbs. of sodium hydroxide, and 1 gal. of water, are treated with steam at 160 lbs. pressure for 3-4 hours in a digester. 3 1/2 lbs. concentrated sulphuric acid in 3-4 gals. of water are added, and the mass is filtered and washed. After drying at 80 DEG C., 5-40 per cent of calcium, barium or strontium hydrate is added and the mixed mass is moulded at 3000 lbs. pressure at 150-160 DEG C. Resistance to moisture is improved by finer grinding, by prolonged heating at 150 DEG C., or by the addition of small proportions of resins, natural or synthetic.
GB31734/30A 1929-10-22 1930-10-22 Improvements in and relating to cellulose compositions Expired GB360637A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US704221XA 1929-10-22 1929-10-22
US360637XA 1929-10-22 1929-10-22

Publications (1)

Publication Number Publication Date
GB360637A true GB360637A (en) 1931-11-12

Family

ID=32473895

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31734/30A Expired GB360637A (en) 1929-10-22 1930-10-22 Improvements in and relating to cellulose compositions

Country Status (2)

Country Link
FR (1) FR704221A (en)
GB (1) GB360637A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113024971A (en) * 2021-04-09 2021-06-25 石嘴山市塑料厂 Preparation method of waste biomass PVC composite pipe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2940424B1 (en) 2008-12-18 2011-04-01 Centre Nat Rech Scient DEVICE FOR MEASURING A PURELY RESISTIVE MATERIAL THICKNESS THICKNESS THRESHOLD, MEASURING METHOD, METHOD OF DIMENSIONING SUCH A DEVICE AND USE OF SUCH A DEVICE IN AN EXHAUST POT.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113024971A (en) * 2021-04-09 2021-06-25 石嘴山市塑料厂 Preparation method of waste biomass PVC composite pipe

Also Published As

Publication number Publication date
FR704221A (en) 1931-05-15

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