GB741756A - Method for producing fine crystals of controlled particle size - Google Patents

Method for producing fine crystals of controlled particle size

Info

Publication number
GB741756A
GB741756A GB15331/53A GB1533153A GB741756A GB 741756 A GB741756 A GB 741756A GB 15331/53 A GB15331/53 A GB 15331/53A GB 1533153 A GB1533153 A GB 1533153A GB 741756 A GB741756 A GB 741756A
Authority
GB
United Kingdom
Prior art keywords
water
rdx
degrees
nozzles
wax
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
GB15331/53A
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.)
Minister of National Defence of Canada
UK Secretary of State for Defence
Original Assignee
Minister of National Defence of Canada
UK Secretary of State for Defence
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 Minister of National Defence of Canada, UK Secretary of State for Defence filed Critical Minister of National Defence of Canada
Publication of GB741756A publication Critical patent/GB741756A/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
    • C06B21/0033—Shaping the mixture
    • C06B21/0066—Shaping the mixture by granulation, e.g. flaking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0004—Crystallisation cooling by heat exchange
    • B01D9/0009—Crystallisation cooling by heat exchange by direct heat exchange with added cooling fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/005—Selection of auxiliary, e.g. for control of crystallisation nuclei, of crystal growth, of adherence to walls; Arrangements for introduction thereof

Abstract

RDX (cyclo-trimethylentrinitramine) is obtained in the form of fine uniform crystals by mixing a jet of a hot, filtered RDX solution in acetone with a jet of water having a temperature below 30 DEG C. (see Group III). The jets impinge at an angle of 60-90 degrees. A small proportion of wax may be included in the acetone solution to produce wax-coated RDX, the wax acting as a desensitizer. Crystals sizes of 1m to 100m may be obtained by adjusting the mass ratio of acetone solution to water, by varying the temperature of the water and the size of the jet nozzles.ALSO:<PICT:0741756/III/1> RDX is crystallized from acetone solution by precipitation with water, jets of solution and water being arranged to impinge on each other at an angle of between 60 degrees and 90 degrees and the water temperature being less than 30 DEG C. As shown hot filtered acetone solution is fed at 13 to a chamber 11 provided with nozzles 15 and a hot water or steam jacket 16 to prevent precipitation of RDX by cooling in the chamber 11 and nozzles 15. A conduit 12 and chamber 10 with nozzles 14 directed towards the nozzles 15 and an angle of between 60 degrees and 90 degrees are provided for the precipitating water. The mixed streams may fall directly into a centrifuge for separation of the crystals. The acetone solution may contain a wax which coats the formed crystals and desensitizes the RDX. Figures are given for the effect on crystal size of variations in flow rates, nozzle size and water temperature.
GB15331/53A 1953-02-24 1953-06-03 Method for producing fine crystals of controlled particle size Expired GB741756A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US741756XA 1953-02-24 1953-02-24

Publications (1)

Publication Number Publication Date
GB741756A true GB741756A (en) 1955-12-14

Family

ID=22118133

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15331/53A Expired GB741756A (en) 1953-02-24 1953-06-03 Method for producing fine crystals of controlled particle size

Country Status (1)

Country Link
GB (1) GB741756A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160630A (en) * 1964-12-08 Amount of acetone in ccs
WO1993004019A1 (en) * 1991-08-27 1993-03-04 E.I. Du Pont De Nemours And Company Process and apparatus for producing ultrafine explosive particles
WO2001014036A1 (en) * 1999-08-19 2001-03-01 Aventis Pharma Limited Process for producing fine medicinal substances
WO2004047797A2 (en) * 2002-11-27 2004-06-10 Pfizer Products Inc. Crystallization method and apparatus using an impinging plate assembly
EP1505047A2 (en) * 2003-07-31 2005-02-09 Dynamit Nobel AIS GmbH Automotive Ignition Systems Use of a microjet reactor for manufacturing a primary explosive
US7422360B2 (en) 2005-02-23 2008-09-09 Cavitech Holdings, Llc Fluid impingement mixing device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3160630A (en) * 1964-12-08 Amount of acetone in ccs
WO1993004019A1 (en) * 1991-08-27 1993-03-04 E.I. Du Pont De Nemours And Company Process and apparatus for producing ultrafine explosive particles
WO1993004018A1 (en) * 1991-08-27 1993-03-04 E.I. Du Pont De Nemours And Company Process and apparatus for producing ultrafine explosive particles
WO2001014036A1 (en) * 1999-08-19 2001-03-01 Aventis Pharma Limited Process for producing fine medicinal substances
WO2004047797A2 (en) * 2002-11-27 2004-06-10 Pfizer Products Inc. Crystallization method and apparatus using an impinging plate assembly
WO2004047797A3 (en) * 2002-11-27 2005-05-26 Pfizer Prod Inc Crystallization method and apparatus using an impinging plate assembly
EP1505047A2 (en) * 2003-07-31 2005-02-09 Dynamit Nobel AIS GmbH Automotive Ignition Systems Use of a microjet reactor for manufacturing a primary explosive
EP1505047A3 (en) * 2003-07-31 2006-11-15 Delphi Technologies, Inc. Use of a microjet reactor for manufacturing a primary explosive
US7422360B2 (en) 2005-02-23 2008-09-09 Cavitech Holdings, Llc Fluid impingement mixing device

Similar Documents

Publication Publication Date Title
GB741756A (en) Method for producing fine crystals of controlled particle size
US4115089A (en) Process and apparatus for making expanded slag
GB2148330A (en) Improvements in or relating to the granulation of slag
GB1520591A (en) Method for drying fructose solutions
US2975142A (en) Granular water-soluble perborate-containing salt mixture
US3386488A (en) Process for producing powders from plastic and wax masses
CA1105234A (en) Method of concentrating salt solutions
GB466795A (en) Improvements in or relating to the production of ammonium nitrate in granular form
ES473383A1 (en) Method of making slag sand and slag wool
JPS55113806A (en) Production of elongated flat metal piece from molten metal
US3025571A (en) Process for producing prilled urea of low biuret content
GB1454884A (en) Process and device for preparing prills
GB1158178A (en) Method for obtaining solids from aqueous solutions and apparatus therefor.
ES471305A1 (en) Method and apparatus for mixing two gas currents
GB1083907A (en) Process for the manufacture of phosphorous acid
GB1203047A (en) Improvements in and relating to an installation for preparing pulverulent material from a liquid
GB1384103A (en) Process for producing powdered paraffin wax
GB1003278A (en) A process for separating melamine from waste gas
GB779811A (en) Process and apparatus for the granulation of fertilisers and the like
GB687083A (en) Complex multimetallic powders
IE32552L (en) Processing fats or oils.
GB1242750A (en) A device for transferring heat to a ducted flow of liquid phase material
GB631027A (en) Method and apparatus for making chocolate confectionery
GB586951A (en) Improvements in and relating to the production of crystalline dextrose
JPS5325276A (en) Granulating apparatus for blast furnace slag