US1972891A - Method of extracting diphenylamine - Google Patents

Method of extracting diphenylamine Download PDF

Info

Publication number
US1972891A
US1972891A US674715A US67471533A US1972891A US 1972891 A US1972891 A US 1972891A US 674715 A US674715 A US 674715A US 67471533 A US67471533 A US 67471533A US 1972891 A US1972891 A US 1972891A
Authority
US
United States
Prior art keywords
diphenylamine
powder
acetone
extracting
mixture
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 - Lifetime
Application number
US674715A
Inventor
William T Ingraham
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US674715A priority Critical patent/US1972891A/en
Application granted granted Critical
Publication of US1972891A publication Critical patent/US1972891A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • This invention relates to a method of extracting diphenylamine and its derivatives from smokeless powder.
  • Smokeless powder that has deteriorated may be ground and reworked into new powder after If the deteriorated powder is to be converted into a product such as nitrocellulose lacquer it is necessary to remove the diphenylamine and its nitro-derivatives as Well as reduce the viscosity of the nitro- It is therefore proposed in the present invention to provide a simple and economical method of removing diphenylamine and its deremoving any free acid present.
  • the method consists in grinding deteriorated smokeless powder and treating it with a mixture of a solvent for diphenylamine which is a gelatinizing agent for nitrocellulose and an agent that prevents or retards gelatinization.
  • a solvent for diphenylamine which is a gelatinizing agent for nitrocellulose and an agent that prevents or retards gelatinization.
  • ample of such a mixture consists of acetone and water, the proportions to be employed depending upon the completeness of extraction desired, the length of time of soaking and the number of Washes.
  • Another advantage of the process is that it permits the reduction of the viscosity of the nitrocelluxose in the powder without the use of a different solvent. This can be done by treating the powder, subsequent to the removal of the diphenylamine and its derivatives, with acetone containing a quantity of acetic acid.

Description

Patented Sept. 11, 1934 UNITED STATES PATENT GFFICE William T. Ingraham, Dover, N. J.
No Drawing. Application June 7, 1933, Serial No. 674,715
4 Claims.
(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) The invention described herein may be manufactured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon.
This invention relates to a method of extracting diphenylamine and its derivatives from smokeless powder.
Smokeless powder that has deteriorated may be ground and reworked into new powder after If the deteriorated powder is to be converted into a product such as nitrocellulose lacquer it is necessary to remove the diphenylamine and its nitro-derivatives as Well as reduce the viscosity of the nitro- It is therefore proposed in the present invention to provide a simple and economical method of removing diphenylamine and its deremoving any free acid present.
cellulose.
rivatives from smokeless powder.
The method consists in grinding deteriorated smokeless powder and treating it with a mixture of a solvent for diphenylamine which is a gelatinizing agent for nitrocellulose and an agent that prevents or retards gelatinization. ample of such a mixture consists of acetone and water, the proportions to be employed depending upon the completeness of extraction desired, the length of time of soaking and the number of Washes.
An ex- A preferred mixture consisting of 70% to 75% acetone and 25% to 30% water, will give almost a complete extraction of the original diphenylamine present in the powder.
Mixtures of equal the mixture.
The ex- Total Fineness of Mixtureace- 55 2 diphenylpowder toneqvater washes hours hours ggglfg Percent In the first two examples given above the washing was conducted at 0., while in the others room temperature was used.
In no case does the solvent cause the smokeless powder to become swollen or adhesive and 0 no difiiculty is experienced in handling the powder during or after extraction.
Another advantage of the process is that it permits the reduction of the viscosity of the nitrocelluxose in the powder without the use of a different solvent. This can be done by treating the powder, subsequent to the removal of the diphenylamine and its derivatives, with acetone containing a quantity of acetic acid.
I claim:
l. The method of treating smokeless powder containing diphenylamine which consists in comminuting the powder, and washing it at room temperature in one or more baths of a mixture composed of acetone 50% to 75% and water 75 50% to 25%.
2. The method of treating smokeless powder containing diphenylamine which consists in comminuting the powder, and washing it in one or more baths of a mixture composed of acetone 50% to 75% and water 50% to 25%.
3. The method of removing diphenylamine from comminuted smokeless powder which consists in submitting the powder to the action of a mixture of acetone to and water 25% to 30%.
i. The method of removing diphenylamine from comminuted smokeless powder which consists in submitting the powder to the action of a mixture of acetone 50 to 75 parts and water 50 to 25 parts.
WILLIAM T. INGRAI-IAM.
US674715A 1933-06-07 1933-06-07 Method of extracting diphenylamine Expired - Lifetime US1972891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US674715A US1972891A (en) 1933-06-07 1933-06-07 Method of extracting diphenylamine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US674715A US1972891A (en) 1933-06-07 1933-06-07 Method of extracting diphenylamine

Publications (1)

Publication Number Publication Date
US1972891A true US1972891A (en) 1934-09-11

Family

ID=24707650

Family Applications (1)

Application Number Title Priority Date Filing Date
US674715A Expired - Lifetime US1972891A (en) 1933-06-07 1933-06-07 Method of extracting diphenylamine

Country Status (1)

Country Link
US (1) US1972891A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919181A (en) * 1955-01-12 1959-12-29 Olin Mathieson Process for the manufacture of globular nitrocellulose

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2919181A (en) * 1955-01-12 1959-12-29 Olin Mathieson Process for the manufacture of globular nitrocellulose

Similar Documents

Publication Publication Date Title
US1972891A (en) Method of extracting diphenylamine
US1972892A (en) Method of extracting diphenylamine
US1650689A (en) Duraiw c
US2439111A (en) Fractional precipitation of cellulose butyrates
US1439656A (en) Process of treating pyro smokeless powder
GB495908A (en) Process for the production of cellulose nitrate from regenerated cellulose
US2172265A (en) Preparation of saponins
US1577075A (en) Process of removing coloring matter from smokeless powder
US1636319A (en) Process of reducing viscosity of nitrocellulose solutions and product thereof
US2149260A (en) Method of preparation of dinitroethyleneurea
USRE18989E (en) Smokeless powder
US1984126A (en) Preparation of acetone-soluble cellulose nitro-acylate
DE582726C (en) Process for converting poorly soluble or insoluble cellulose ether into a readily soluble form
US1553495A (en) Process of treating nitrocellulose to reduce its viscosity
US2123517A (en) Process of treating smokeless powder
US2033217A (en) Process of treating smokeless powder
US2394223A (en) Pentaerythritol tetranitrate recovery
US647420A (en) Process of increasing stability of nitrocellulose.
US1754417A (en) Explosive and solvent therefor
US1648509A (en) Process of changing the viscosity characteristics of nitrocellulosic materials
US2119116A (en) Treatment of cellulose esters
DE336054C (en) Method of stabilizing nitrocellulose
DE638433C (en) Process for the manufacture of explosives
DE1771848C (en) Process for removing acid from crude, acidic pentaerythritol tetranitrate
DE555765C (en) Process for the production of nitrocellulose