GB1080360A - Improvements in and relating to crystallisation processes - Google Patents

Improvements in and relating to crystallisation processes

Info

Publication number
GB1080360A
GB1080360A GB30756/65A GB3075665A GB1080360A GB 1080360 A GB1080360 A GB 1080360A GB 30756/65 A GB30756/65 A GB 30756/65A GB 3075665 A GB3075665 A GB 3075665A GB 1080360 A GB1080360 A GB 1080360A
Authority
GB
United Kingdom
Prior art keywords
xylene
crystals
rest
passing
chillers
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
GB30756/65A
Inventor
Roland Clift
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB30756/65A priority Critical patent/GB1080360A/en
Priority to BE684425D priority patent/BE684425A/xx
Priority to DE19661519819 priority patent/DE1519819A1/en
Priority to FR70067A priority patent/FR1487096A/en
Priority to NL6610208A priority patent/NL6610208A/xx
Publication of GB1080360A publication Critical patent/GB1080360A/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
    • B01D9/004—Fractional crystallisation; Fractionating or rectifying columns
    • 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/14—Purification; Separation; Use of additives by crystallisation; Purification or separation of the crystals

Abstract

Pure p-xylene is produced by passing impure liquid p-xylene through a non-return valve (7) and a plurality of scraped surface chillers (3), pumping a portion of the resulting slurry of large p-xylene crystals through a recycle coil (6) having a path of approximately the same length as that of the chillers, and passing the rest of the slurry downwards through a pipe (9) having a permeable filter section surrounded by metal mesh (11) for removal of mother liquor, the remaining crystals being passed downwards through a melting section comprising a jacket heater (5) and an element (12) to produce a melt, a portion of which is forced upwards in countercurrent to the crystals and the rest of which is forced through an outlet as product under the action of pulsating pressure produced by a reciprocating piston (15).ALSO:Pure p-xylene is produced by passing impure liquid p-xylene through a non-return valve (7) and a plurality of scraped surface chillers (3), pumping a portion of the resulting slurry of large p-xylene crystals through a recycle coin (6) having a path of approximately the same length as that of the chillers, and passing the rest of the slurry downwards through a pipe (9) having a permeable filter section surrounded by metal mesh (11) for removal of mother liquor, the remaining crystals being passed downwards through a melting section comprising a jacket heater (51) and an element (12) to produce a melt, a portion of which is forced upwards in counter-current to the crystals and the rest of which is forced through an outlet as product under the action of pulsating pressure produced by a reciprocating piston (15).
GB30756/65A 1965-07-20 1965-07-20 Improvements in and relating to crystallisation processes Expired GB1080360A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB30756/65A GB1080360A (en) 1965-07-20 1965-07-20 Improvements in and relating to crystallisation processes
BE684425D BE684425A (en) 1965-07-20 1966-07-20
DE19661519819 DE1519819A1 (en) 1965-07-20 1966-07-20 Crystallization process
FR70067A FR1487096A (en) 1965-07-20 1966-07-20 Crystallization process
NL6610208A NL6610208A (en) 1965-07-20 1966-07-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB30756/65A GB1080360A (en) 1965-07-20 1965-07-20 Improvements in and relating to crystallisation processes

Publications (1)

Publication Number Publication Date
GB1080360A true GB1080360A (en) 1967-08-23

Family

ID=10312646

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30756/65A Expired GB1080360A (en) 1965-07-20 1965-07-20 Improvements in and relating to crystallisation processes

Country Status (4)

Country Link
BE (1) BE684425A (en)
DE (1) DE1519819A1 (en)
GB (1) GB1080360A (en)
NL (1) NL6610208A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2686096A1 (en) * 2011-03-18 2014-01-22 GTC Technology US LLC Energy recovery from mother liquid in paraxylene crystallization process

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2686096A1 (en) * 2011-03-18 2014-01-22 GTC Technology US LLC Energy recovery from mother liquid in paraxylene crystallization process
EP2686096A4 (en) * 2011-03-18 2014-09-10 Gtc Technology Us Llc Energy recovery from mother liquid in paraxylene crystallization process

Also Published As

Publication number Publication date
NL6610208A (en) 1967-01-23
BE684425A (en) 1967-01-20
DE1519819A1 (en) 1969-03-13

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