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GB1066032A - Improvements in and relating to refining processes - Google Patents

Improvements in and relating to refining processes

Info

Publication number
GB1066032A
GB1066032A GB19228/63A GB1922863A GB1066032A GB 1066032 A GB1066032 A GB 1066032A GB 19228/63 A GB19228/63 A GB 19228/63A GB 1922863 A GB1922863 A GB 1922863A GB 1066032 A GB1066032 A GB 1066032A
Authority
GB
United Kingdom
Prior art keywords
crystals
space
draining
purified
drained
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
GB19228/63A
Inventor
Jan Godfrey David Molinari
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.)
EXPL DES PROCEDES DER HALDE AB
Original Assignee
EXPL DES PROCEDES DER HALDE AB
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 EXPL DES PROCEDES DER HALDE AB filed Critical EXPL DES PROCEDES DER HALDE AB
Priority to GB19228/63A priority Critical patent/GB1066032A/en
Publication of GB1066032A publication Critical patent/GB1066032A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/495—Pick-up tubes adapted for an input of sonic, ultrasonic, or mechanical vibrations and having an electric output
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/38—Separation; Purification; Stabilisation; Use of additives
    • C07C17/392—Separation; Purification; Stabilisation; Use of additives by crystallisation; Purification or separation of the crystals
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06—Preparation of nitro compounds
    • C07C201/16—Separation; Purification; Stabilisation; Use of additives
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C205/00—Compounds containing nitro groups bound to a carbon skeleton
    • C07C205/07—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms
    • C07C205/11—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to carbon atoms of six-membered aromatic rings
    • C07C205/12—Compounds containing nitro groups bound to a carbon skeleton the carbon skeleton being further substituted by halogen atoms having nitro groups bound to carbon atoms of six-membered aromatic rings the six-membered aromatic ring or a condensed ring system containing that ring being substituted by halogen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/68—Purification; separation; Use of additives, e.g. for stabilisation
    • C07C37/70—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment
    • C07C37/84—Purification; separation; Use of additives, e.g. for stabilisation by physical treatment by crystallisation
    • 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)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

Crystallizable hydrocarbons containing a molecular constituent other than a benzene ring are purified by crystallizing in a vessel, having a space below the crystals, and heating the crystals to recover a plurality of fractions which are drained through the space. The space may be formed by introducing a heavier immiscible liquid which is drained after the crystallization or by melting a lower portion of the crystals first and draining; the space is separated from the crystals by filter means. Cyclohexane, dicyclopentadiene, p-xylene and paraffin wax may be so purified. Suitable apparatus is described in Specification 899,799. Lard, which comprises stearines, may be similarly purified.ALSO:Crystallisable organic compounds are purified by crystallising in a vessel having a space below the crystals and heating the crystals to recover a plurality of fractions which are drained through the space. The purification of p-dichlorobenzene, p-cresol and nitrochlorobenzene is exemplified and reference is also made to acetamide, acetic acid, aniline, benzoic acid, caprolactam, carbazole, m-cresol, ethyl alcohol, formic acid, phenol, propionic acid, phthalic anhydride, succinic acid, stearic acid, and triethanolamine. The process is effected in the apparatus described in Specification 899,799; the lower space is separated by filter means and is formed by introducing a heavy immiscible liquid before crystallisation and afterwards draining this liquid or by melting and draining the lower portion of crystals.ALSO:Crystallizable metals, e.g. tin and zinc, are purified by crystallizing in a vessel having a space below the crystals and heating the crystals to recover a plurality of fractions which are drained through the space. The process is effected in the apparatus described in Specification 899,799; the lower space is separated by filter means and is formed by introducing a heavy immiscible liquid before crystallization and afterwards draining this liquid or by melting and draining the lower portion of crystals.ALSO:Crystallizable elements or inorganic compounds are purified by crystallizing in a vessel having a space below the crystals and heating the crystals to recover a plurality of fractions which are drained through the lower space. The purification of sulphur, urea, and the cyanides, chlorides and sulphates of sodium, calcium and potassium is referred to. The process is effected in the apparatus described in Specification 899,799; the lower space is separated from the crystals by filter means and is formed by introducing a heavy immiscible liquid before crystallization and afterwards draining this liquid, or by melting and draining the lower portion of crystals.
GB19228/63A 1963-05-15 1963-05-15 Improvements in and relating to refining processes Expired GB1066032A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB19228/63A GB1066032A (en) 1963-05-15 1963-05-15 Improvements in and relating to refining processes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19228/63A GB1066032A (en) 1963-05-15 1963-05-15 Improvements in and relating to refining processes

Publications (1)

Publication Number Publication Date
GB1066032A true GB1066032A (en) 1967-04-19

Family

ID=10125859

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19228/63A Expired GB1066032A (en) 1963-05-15 1963-05-15 Improvements in and relating to refining processes

Country Status (1)

Country Link
GB (1) GB1066032A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146170A1 (en) * 1983-12-05 1985-06-26 ENICHEM S.p.A. Process for purifying 2,6 - xylenol
EP0878456A1 (en) * 1997-05-14 1998-11-18 Albemarle Corporation Process for the preparation of p-bromotoluene
US10561962B2 (en) 2016-01-12 2020-02-18 Sabic Global Technologies B.V. Dynamic melt crystallization process for purifying dicyclopentadiene from a mixed liquid hydrocarbon stream

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0146170A1 (en) * 1983-12-05 1985-06-26 ENICHEM S.p.A. Process for purifying 2,6 - xylenol
EP0878456A1 (en) * 1997-05-14 1998-11-18 Albemarle Corporation Process for the preparation of p-bromotoluene
US5874659A (en) * 1997-05-14 1999-02-23 Albemarle Corporation Process for the preparation of p-bromotoluene
US10561962B2 (en) 2016-01-12 2020-02-18 Sabic Global Technologies B.V. Dynamic melt crystallization process for purifying dicyclopentadiene from a mixed liquid hydrocarbon stream

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