GB1075193A - Improvements in or relating to a process for preparing densified particles of nitrocellulose - Google Patents

Improvements in or relating to a process for preparing densified particles of nitrocellulose

Info

Publication number
GB1075193A
GB1075193A GB7660/65A GB766065A GB1075193A GB 1075193 A GB1075193 A GB 1075193A GB 7660/65 A GB7660/65 A GB 7660/65A GB 766065 A GB766065 A GB 766065A GB 1075193 A GB1075193 A GB 1075193A
Authority
GB
United Kingdom
Prior art keywords
nitrocellulose
solvent
particles
diluent
slurry
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
GB7660/65A
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 LLC
Original Assignee
Hercules LLC
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 LLC filed Critical Hercules LLC
Publication of GB1075193A publication Critical patent/GB1075193A/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
    • C06B21/0016—Compounding the ingredient the ingredient being nitrocellulose or oranitro cellulose based propellant; Working up; gelatinising; stabilising
    • 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
    • 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
    • C06B21/0033—Shaping the mixture
    • C06B21/0066—Shaping the mixture by granulation, e.g. flaking
    • 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
    • C08B5/06—Isolation of the cellulose nitrate

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (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)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

"Densified" nitrocellulose particles are produced by forming a slurry by agitating water-moist nitrocellulose fibres free from fibre aggregates in a mixture of a volatile hydrocarbon diluent, a volatile nitrocellulose solvent miscible in all proportions therewith and a small proportion of a water-soluble protective colloid, the mixture of diluent and solvent being capable of softening and swelling the nitrocellulose fibres but not of dissolving them and the solvent being soluble in water at ordinary atmospheric temperatures to the extent of at least 2.5% by weight, subjecting the slurry to high shear action until the softened and swollen fibres break down into smooth surfaced rounded particles, initiating the hardening of the particles by dilution of the slurry with the hydrocarbon diluent while the high shear agitation is continued, and finally removing substantially all of the nitrocellulose solvent and water by azeotropic distillation in the presence of hydrocarbon diluent (in a proportion sufficient to prevent resoftening of the particles) to complete the hardening and densification of the nitrocellulose particles. The diluent may be a volatile petroleum hydrocarbon or mixture of volatile petroleum hydrocarbons, for example heptane in a petroleum distillate boiling between 190 DEG and 240 DEG F. preferably between 201 DEG and 217 DEG F. The nitrocellulose solvent may be methyl ethyl ketone and the nitrogen content of the nitrocellulose may be about 11% by weight or over 12.6% by weight. The initial ratio (by weight) of the diluent to the solvent in the slurry may be between 1.0 and 1.2.
GB7660/65A 1964-04-08 1965-02-22 Improvements in or relating to a process for preparing densified particles of nitrocellulose Expired GB1075193A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US358366A US3236702A (en) 1964-04-08 1964-04-08 Manufacture of densified spheroidal fine particle nitrocellulose

Publications (1)

Publication Number Publication Date
GB1075193A true GB1075193A (en) 1967-07-12

Family

ID=23409380

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7660/65A Expired GB1075193A (en) 1964-04-08 1965-02-22 Improvements in or relating to a process for preparing densified particles of nitrocellulose

Country Status (7)

Country Link
US (1) US3236702A (en)
BE (1) BE662278A (en)
CH (1) CH431946A (en)
DE (1) DE1446879A1 (en)
FR (1) FR1436182A (en)
GB (1) GB1075193A (en)
NL (1) NL6504498A (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3341515A (en) * 1964-07-28 1967-09-12 Hercules Inc Manufacture of hydrocarbon-wet, densified nitrocellulose
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
USRE28361E (en) * 1966-02-08 1975-03-11 Polymer pigmentation
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
US3632369A (en) * 1969-12-11 1972-01-04 Coaden Oil & Chemical Co Polymer pigmentation
US4163681A (en) * 1970-04-15 1979-08-07 The United States Of America As Represented By The Secretary Of The Navy Desensitized explosives and castable thermally stable high energy explosive compositions therefrom
US3967973A (en) * 1972-04-21 1976-07-06 Owens-Illinois, Inc. Vehicle and sealing glass paste and method for making same
US3985691A (en) * 1972-05-17 1976-10-12 Societe Nationale Des Poudres Et Explosifs Particulate nitrocellulose composition
US3925125A (en) * 1973-12-06 1975-12-09 Us Navy Moisture replacement in pelletized nitrocellulose
US3962382A (en) * 1974-08-27 1976-06-08 The United States Of America As Represented By The Secretary Of The Navy Process for forming a pourable plastisol nitrocellulose slurry
GB2067568B (en) * 1979-12-28 1984-05-31 Asahi Chemical Ind Nitrocellulose composition and process for production thereof
FR2494263A1 (en) * 1980-11-14 1982-05-21 Poudres & Explosifs Ste Nale METHOD FOR MANUFACTURING GRANULATED FINE PROPULSIVE POWDERS AND POWDERS THUS OBTAINED
DE4336049C1 (en) * 1993-10-22 1995-03-09 Fraunhofer Ges Forschung Process for preparing spherulitic nitroguanidine
RU2685662C1 (en) * 2018-04-04 2019-04-22 Федеральное казенное предприятие "Государственный научно-исследовательский институт химических продуктов" (ФКП "ГосНИИХП") Method for cellulose nitrate grinding
CN113512905A (en) * 2020-04-09 2021-10-19 刘永胜 Paper holder processing technology

Family Cites Families (3)

* 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
US2946673A (en) * 1955-12-29 1960-07-26 Hercules Powder Co Ltd Manufacture of double-base propellant grains
US2885736A (en) * 1956-03-26 1959-05-12 Olin Mathieson Nitrocellulose particles

Also Published As

Publication number Publication date
US3236702A (en) 1966-02-22
CH431946A (en) 1967-03-15
DE1446879A1 (en) 1969-04-17
NL6504498A (en) 1965-10-11
BE662278A (en) 1965-10-08
FR1436182A (en) 1966-04-22

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