GB935432A - Improvements in the manufacture of crystalline substances - Google Patents

Improvements in the manufacture of crystalline substances

Info

Publication number
GB935432A
GB935432A GB38775/60A GB3877560A GB935432A GB 935432 A GB935432 A GB 935432A GB 38775/60 A GB38775/60 A GB 38775/60A GB 3877560 A GB3877560 A GB 3877560A GB 935432 A GB935432 A GB 935432A
Authority
GB
United Kingdom
Prior art keywords
crystals
grown
suspension
solvent
size
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
GB38775/60A
Inventor
Ronald Percy Ayerst
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.)
SECR AVIATION
Minister of Aviation
Original Assignee
SECR AVIATION
Minister of Aviation
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 SECR AVIATION, Minister of Aviation filed Critical SECR AVIATION
Priority to GB38775/60A priority Critical patent/GB935432A/en
Publication of GB935432A publication Critical patent/GB935432A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01D9/0013—Crystallisation cooling by heat exchange by indirect heat exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0036—Crystallisation on to a bed of product crystals; Seeding
    • 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

<PICT:0935432/III/1> Crystals are increased in size by forming a suspension in a saturated solution and then alternately raising and lowering the temperature of the solution in cyclic manner, while maintaining the crystals in suspension so as to increase the size of some crystals at the expense of others. Each cycle may last for 3-20 minutes. The temperature may alternate between 10 DEG and 50 DEG C. There may be 5-10 cycles. As shown a slurry passes from a feed chamber 1 to solid collection chamber 2 and liquid overflow pipe 3 via a pipe 4 wherein it is alternately heated and cooled by means of heaters 5 and coolers 6 while being subjected to the pulsating action of an oscillating diaphragm 7 operated by a piston engine 8. Oxalic acid crystals may be grown in cyclohexanone or a mixture of acetone and water as solvent, and ammonium perchlorate crystals may be grown in water as solvent.
GB38775/60A 1958-05-29 1958-05-29 Improvements in the manufacture of crystalline substances Expired GB935432A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB38775/60A GB935432A (en) 1958-05-29 1958-05-29 Improvements in the manufacture of crystalline substances

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB38775/60A GB935432A (en) 1958-05-29 1958-05-29 Improvements in the manufacture of crystalline substances

Publications (1)

Publication Number Publication Date
GB935432A true GB935432A (en) 1963-08-28

Family

ID=10405618

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38775/60A Expired GB935432A (en) 1958-05-29 1958-05-29 Improvements in the manufacture of crystalline substances

Country Status (1)

Country Link
GB (1) GB935432A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2004206731B2 (en) * 2003-01-20 2008-03-20 Novartis Ag Process for modifying drug crystal formation
EP2338579A1 (en) * 2009-12-11 2011-06-29 JGC Corporation Crystallization method and crystallization apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2004206731B2 (en) * 2003-01-20 2008-03-20 Novartis Ag Process for modifying drug crystal formation
US8008511B2 (en) 2003-01-20 2011-08-30 Novartis Ag Process for modifying drug crystal formation
US8124795B2 (en) 2003-01-20 2012-02-28 Novartis Ag Process for modifying drug crystal formation
EP2338579A1 (en) * 2009-12-11 2011-06-29 JGC Corporation Crystallization method and crystallization apparatus
US8425625B2 (en) 2009-12-11 2013-04-23 Jgc Corporation Crystallization method and crystallization apparatus

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