GB1023570A - Improvements in or relating to a nitrocellulose product and process of manufacture - Google Patents

Improvements in or relating to a nitrocellulose product and process of manufacture

Info

Publication number
GB1023570A
GB1023570A GB32767/64A GB3276764A GB1023570A GB 1023570 A GB1023570 A GB 1023570A GB 32767/64 A GB32767/64 A GB 32767/64A GB 3276764 A GB3276764 A GB 3276764A GB 1023570 A GB1023570 A GB 1023570A
Authority
GB
United Kingdom
Prior art keywords
nitrocellulose
granules
water
solvent
hydrocarbon
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
GB32767/64A
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.)
Hercules Powder Co
Original Assignee
Hercules Powder 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 Hercules Powder Co filed Critical Hercules Powder Co
Publication of GB1023570A publication Critical patent/GB1023570A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C06B21/0008—Compounding the ingredient
    • 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
    • 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
    • C08B5/04—Post-esterification treatments, e.g. densification of powders, including purification
    • 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
    • C08B5/04—Post-esterification treatments, e.g. densification of powders, including purification
    • C08B5/12—Replacing the water by organic liquids

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

Hydrocarbon-wet nitrocellulose granules are made by contacting a heated, agitated, aqueous slurry of fibrous nitrocellulose with 0.3-2.0 parts by weight, per part of nitrocellulose, of an organic liquid which is a solvent for the nitro-cellulose, removing substantially all of the solvent by distillation while continuing agitation, separating excess water from the resulting hardened nitrocellulose granules, then substantially displacing sorbed water from the water-wet nitrocellulose granules in presence of excess volatile hydrocarbon liquid, separating excess hydrocarbon, and recovering nitrocellulose granules wetted with 10-40% by weight of sorbed hydrocarbon, based on total weight. The organic liquid solvent may be a ketone or an ester, while the hydrocarbon may be aliphatic or aromatic. Many are specified. The aqueous nitrocellulose slurry may contain 5-20% by weight of nitrocellulose, and is preferably heated to a temperature at or near the boiling-point of the organic solvent or water-solvent azeotrope. The proportion of added solvent is sufficient to soften, but not to dissolve, the nitrocellulose, which is then converted to hardened, irregular, dense granules by distilling off the solvent at atmospheric or reduced pressure. After removal of excess water by e.g. drainage or centrifugation, sorbed water may be displaced by slurrying the water-wet granules in excess hydrocarbon and distilling at atmospheric pressure, or under reduced or increased pressure. The resulting free-flowing granules contain usually less than 1% by weight of water, and have a bulk density (dry basis) of 20-40 lbs. per cubic foot. In examples, toluene-wet nitrocellulose granules are prepared from fibrous nitro-cellulose containing 11.0-12.6% of nitrogen, after softening with methyl ethyl ketone, methyl isopropyl ketone, or isopropyl acetate.
GB32767/64A 1963-08-27 1964-08-11 Improvements in or relating to a nitrocellulose product and process of manufacture Expired GB1023570A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US304985A US3284253A (en) 1963-08-27 1963-08-27 Densified nitrocellulose-hydrocarbon product and process of manufacture

Publications (1)

Publication Number Publication Date
GB1023570A true GB1023570A (en) 1966-03-23

Family

ID=23178800

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32767/64A Expired GB1023570A (en) 1963-08-27 1964-08-11 Improvements in or relating to a nitrocellulose product and process of manufacture

Country Status (8)

Country Link
US (1) US3284253A (en)
BE (1) BE652163A (en)
CH (1) CH435706A (en)
DE (1) DE1226014B (en)
FR (1) FR1412595A (en)
GB (1) GB1023570A (en)
NL (1) NL6409965A (en)
SE (1) SE355187B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075024A1 (en) * 1981-04-02 1983-03-30 Daicel Chemical Industries, Ltd. Process for the preparation of nitrocellulose compositions

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3325315A (en) * 1965-12-14 1967-06-13 Hercules Inc Manufacture of densified spheroidal nitrocellulose of high viscosity at casting temperatures
US3325571A (en) * 1966-01-25 1967-06-13 Hercules Inc Process for the manufacture of smokeless powder
US3325572A (en) * 1966-05-24 1967-06-13 Hercules Inc Process for preparing small, densified nitrocellulose particles
US3346675A (en) * 1966-09-08 1967-10-10 Hercules Inc Method of preparing small particle nitrocellulose
FR94575E (en) * 1967-12-20 1969-09-12 France Etat Improvements to cellulose nitration processes.
US3925125A (en) * 1973-12-06 1975-12-09 Us Navy Moisture replacement in pelletized nitrocellulose
GB2067568B (en) * 1979-12-28 1984-05-31 Asahi Chemical Ind Nitrocellulose composition and process for production thereof
DE3334823A1 (en) 1983-09-26 1985-04-04 Wolff Walsrode Ag, 3030 Walsrode METHOD FOR PRODUCING GIANT CAPABILITY OF NITROCELLULOSE
DE3430437A1 (en) * 1984-08-18 1986-02-27 Wolff Walsrode Ag, 3030 Walsrode WITH TERT. ALCOHOLIC WETTED NITROCELLULOSE AND THEIR USE IN POLYURETHANE PAINT
US5144020A (en) * 1991-05-17 1992-09-01 Aqualon Company High productivity spheroid nitrocellulose
IT1255438B (en) * 1992-07-17 1995-10-31 Getters Spa NON-EVAPORABLE GETTER PUMP
DE4405210A1 (en) * 1994-02-18 1995-08-24 Wolff Walsrode Ag Emulsifier-free paint binders in granulate form and their production
DE19709702A1 (en) 1997-03-10 1998-09-17 Wolff Walsrode Ag Paint binder preparations, their manufacture and use
DE10152396A1 (en) * 2001-10-24 2003-05-15 Bowas Ag Fuer Industrievertrie Manufacture of anhydrous nitrocellulose and eyplosive substances in spheroidal form

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2715574A (en) * 1951-06-14 1955-08-16 Olin Mathieson Process of making spherical powder grains
US2948601A (en) * 1958-11-17 1960-08-09 Hercules Powder Co Ltd Densification of nitrocellulose

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0075024A1 (en) * 1981-04-02 1983-03-30 Daicel Chemical Industries, Ltd. Process for the preparation of nitrocellulose compositions
EP0075024A4 (en) * 1981-04-02 1984-02-07 Daicel Chem Process for the preparation of nitrocellulose compositions.

Also Published As

Publication number Publication date
BE652163A (en) 1900-01-01
CH435706A (en) 1967-05-15
SE355187B (en) 1973-04-09
DE1226014B (en) 1966-09-29
NL6409965A (en) 1965-03-01
US3284253A (en) 1966-11-08
FR1412595A (en) 1965-10-01

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