GB872960A - Improvements relating to the production of naphthalene - Google Patents

Improvements relating to the production of naphthalene

Info

Publication number
GB872960A
GB872960A GB3459A GB3459A GB872960A GB 872960 A GB872960 A GB 872960A GB 3459 A GB3459 A GB 3459A GB 3459 A GB3459 A GB 3459A GB 872960 A GB872960 A GB 872960A
Authority
GB
United Kingdom
Prior art keywords
crystals
centrifuge
naphthalene
oil
cooled
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
GB3459A
Inventor
Brian Edward Alston Thomas
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.)
Chemical Engineering Wiltons Ltd
Original Assignee
Chemical Engineering Wiltons 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 Chemical Engineering Wiltons Ltd filed Critical Chemical Engineering Wiltons Ltd
Priority to GB3459A priority Critical patent/GB872960A/en
Publication of GB872960A publication Critical patent/GB872960A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

In the separation of naphthalene from crude naphthalene oil the oil is crystallised at a temperature above 18 DEG C. and the resultant crystals are separated in a first centrifuge, the discharged liquor is further cooled to below 18 DEG C. and the resultant crystals separated in a second centrifuge and the latter crystals are melted and returned to the inlet to the first crystalliser. Preferably in the second crystallisation the oil is cooled to about 5 DEG C. The crystals obtained in the first centrifuge may be purified by washing with a solvent or hot water which may contain caustic soda, a soap or a surface active agent or by steam treatment.ALSO:Naphthalene is obtained from naphthalene oil by crystallizing at above 18 DEG C. and separating the crystals in a first centrifuge, cooling the mother liquors to below 18 DEG C. and separating the crystals formed in a second centrifuge, and melting these crystals, and returning them to the first crystalliser. In the second crystallisation the liquors are cooled to about 5 DEG C.
GB3459A 1959-01-01 1959-01-01 Improvements relating to the production of naphthalene Expired GB872960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3459A GB872960A (en) 1959-01-01 1959-01-01 Improvements relating to the production of naphthalene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3459A GB872960A (en) 1959-01-01 1959-01-01 Improvements relating to the production of naphthalene

Publications (1)

Publication Number Publication Date
GB872960A true GB872960A (en) 1961-07-19

Family

ID=9697210

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3459A Expired GB872960A (en) 1959-01-01 1959-01-01 Improvements relating to the production of naphthalene

Country Status (1)

Country Link
GB (1) GB872960A (en)

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