GB338941A - Improvements in apparatus for the digestion of nitrocellulose or purification of cellulose - Google Patents

Improvements in apparatus for the digestion of nitrocellulose or purification of cellulose

Info

Publication number
GB338941A
GB338941A GB23449/29A GB2344929A GB338941A GB 338941 A GB338941 A GB 338941A GB 23449/29 A GB23449/29 A GB 23449/29A GB 2344929 A GB2344929 A GB 2344929A GB 338941 A GB338941 A GB 338941A
Authority
GB
United Kingdom
Prior art keywords
pipe
valve
coil
pressure
stand
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
GB23449/29A
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 GB338941A publication Critical patent/GB338941A/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
    • 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
    • C08B5/10—Reducing the viscosity

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)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Treatment Of Sludge (AREA)

Abstract

338,941. Hercules Powder Co., (Assignees of Milliken, M. G.). May 29, 1929. Addition to 301,267. Digesters.-In apparatus of the kind described in the parent Specification for the digestion of nitrated cellulose or for the purification of cellulose, the material is forced under pressure together with water through a restricted passage such as a coil of substantial length and relatively small cross-section, a valve being provided for controlling the discharge from said passage, the valve being replaced by or employed in conjunction with a stand-pipe or chamber to effect a substantial equalization of the pressure in the coil between the inlet and discharge ends, As applied to the treatment of gun-cotton, the material is treated in a tube A, fitted with agitating gear, and is forced together with water by a pump B through the coil C at a pressure of 80 lbs. per square inch and a velocity of about 2 feet per second. The apparatus may be made of chrome steel. The coil is steam-heated at e, insulated at g, and provided with a cooling jacket at f, the preferred temperature range being 130-160‹ C. The material passes from the coil through a valve j to the stand pipe X, and from thence to the tank D. The valve j is a conical member pressed against its seat by a spring n positioned between the valve stem and an adjustable stop O so as to open wider in case jamming off the gun-cotton being forced through causes a building-up of pressure. The operation of the valve is ensured by a stream of water which is forced into the coil C through a pipe E adjacent to the valve casing H. A pipe is provided for releasing back-pressure in the stand-pipe, and by means of a pipe T the coil C may be discharged directly into the tank D. A vent pipe y controlled by a valve z is provided in the downward extension X<1> of the stand-pipe.
GB23449/29A 1929-05-29 1929-07-30 Improvements in apparatus for the digestion of nitrocellulose or purification of cellulose Expired GB338941A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US366921A US1911201A (en) 1929-05-29 1929-05-29 Apparatus for the digestion of nitrocellulose

Publications (1)

Publication Number Publication Date
GB338941A true GB338941A (en) 1930-12-01

Family

ID=23445164

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23449/29A Expired GB338941A (en) 1929-05-29 1929-07-30 Improvements in apparatus for the digestion of nitrocellulose or purification of cellulose

Country Status (4)

Country Link
US (1) US1911201A (en)
DE (1) DE613036C (en)
FR (1) FR685344A (en)
GB (1) GB338941A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE966307C (en) * 1944-04-23 1957-07-25 Dynamit Nobel Ag Arrangement of a plant for the production of ready-to-ship nitrocellulose
US3053640A (en) * 1957-01-08 1962-09-11 Koppers Co Inc Apparatus for high pressure polymerization of polymerizable materials
US4323669A (en) * 1980-07-23 1982-04-06 Hercules Incorporated Process for purification of nitrocellulose

Also Published As

Publication number Publication date
US1911201A (en) 1933-05-30
DE613036C (en) 1935-05-11
FR685344A (en) 1930-07-09

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