GB469424A - Improvements in or relating to the manufacture of nitrocellulose - Google Patents

Improvements in or relating to the manufacture of nitrocellulose

Info

Publication number
GB469424A
GB469424A GB2367/36A GB236736A GB469424A GB 469424 A GB469424 A GB 469424A GB 2367/36 A GB2367/36 A GB 2367/36A GB 236736 A GB236736 A GB 236736A GB 469424 A GB469424 A GB 469424A
Authority
GB
United Kingdom
Prior art keywords
chips
acid
compactness
per cent
sheets
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
GB2367/36A
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.)
DuPont Viscoloid Co
Original Assignee
DuPont Viscoloid Co
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 DuPont Viscoloid Co filed Critical DuPont Viscoloid Co
Publication of GB469424A publication Critical patent/GB469424A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B5/00—Preparation of cellulose esters of inorganic acids, e.g. phosphates
    • C08B5/02—Cellulose nitrate, i.e. nitrocellulose

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Sheets of cellulose pulp having a thickness of two to eight hundredths of an inch and a compactness of 50--115 are subdivided and the chips so produced are treated at a temperature not substantially less than 40 DEG C. with a nitrating acid composition containing 50--75 per cent of nitric acid. The compactness is the ratio of the weight in pounds of 415,000 sq. ins. of the sheet to 100 times the thickness of the sheet in inches. Preferably, the sheets are of thickness 0,03--0,035 inches and of compactness 60--80, they are cut into chips one-eighth to one-sixteenth inch square, and the chips are nitrated with a mixture of sulphuric acid and water with 60 per cent of nitric acid at a temperature of 40--50 DEG C., the amount of mixed acid being 10 times the dry weight of cellulose. In an example, chips obtained by cutting purified wood cellulose sheets are dried to 1 per cent moisture content and treated with a nitrating mixture containing 60 per cent of nitric acid in a mechanical type of dipper pot. The charge is then dropped into a centrifuge and excess acid wrung out. The product is drowned in water, stabilized by heating in acid water, and then washed. In another example chips are cut from cellulose sheets having a compactness of 110. The nitrocellulose obtained by the process may be used in the production of lacquers for metal or wood, leather dopes, and camphor-alcohol plastics. Specification 336,235, [Class 2 (ii)], is referred to.
GB2367/36A 1935-03-02 1936-01-24 Improvements in or relating to the manufacture of nitrocellulose Expired GB469424A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US469424XA 1935-03-02 1935-03-02

Publications (1)

Publication Number Publication Date
GB469424A true GB469424A (en) 1937-07-26

Family

ID=21946204

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2367/36A Expired GB469424A (en) 1935-03-02 1936-01-24 Improvements in or relating to the manufacture of nitrocellulose

Country Status (1)

Country Link
GB (1) GB469424A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008070945A2 (en) * 2006-12-14 2008-06-19 Ima Química S/A Process for obtaining nitrocellulose, process for nitrating wood cellulose to obtain nitrocellulose, and nitrocellulose obtained from such process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008070945A2 (en) * 2006-12-14 2008-06-19 Ima Química S/A Process for obtaining nitrocellulose, process for nitrating wood cellulose to obtain nitrocellulose, and nitrocellulose obtained from such process
WO2008070945A3 (en) * 2006-12-14 2008-07-31 Ima Quimica S A Process for obtaining nitrocellulose, process for nitrating wood cellulose to obtain nitrocellulose, and nitrocellulose obtained from such process

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