GB1263697A - Crystallization process - Google Patents

Crystallization process

Info

Publication number
GB1263697A
GB1263697A GB22545/68A GB2254568A GB1263697A GB 1263697 A GB1263697 A GB 1263697A GB 22545/68 A GB22545/68 A GB 22545/68A GB 2254568 A GB2254568 A GB 2254568A GB 1263697 A GB1263697 A GB 1263697A
Authority
GB
United Kingdom
Prior art keywords
crystals
refrigerant
mother liquor
xylene
mixture
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
GB22545/68A
Inventor
Hendrik Groothuis
Jan Gerrit Van De Vusse
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to GB22545/68A priority Critical patent/GB1263697A/en
Priority to ES367139A priority patent/ES367139A1/en
Priority to NL6907236.A priority patent/NL162562C/en
Priority to CA051260A priority patent/CA927405A/en
Priority to DE19691924152 priority patent/DE1924152C3/en
Priority to FR6915235A priority patent/FR2008376A1/fr
Priority to SE06669/69A priority patent/SE357730B/xx
Priority to BE732926D priority patent/BE732926A/xx
Publication of GB1263697A publication Critical patent/GB1263697A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G73/00—Recovery or refining of mineral waxes, e.g. montan wax
    • C10G73/02—Recovery of petroleum waxes from hydrocarbon oils; Dewaxing of hydrocarbon oils
    • C10G73/06—Recovery of petroleum waxes from hydrocarbon oils; Dewaxing of hydrocarbon oils with the use of solvents
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D9/00—Crystallisation
    • B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,263,697. Crystallization. SHELL INTERNATIONAL RESEARCH MAATSCHAPPIJ N.V. 12 May, 1969 [13 May, 1968 (2)], Nos. 22544/68 and 22545/68. Heading B1G. [Also in Division C5] A component, e.g. p-xylene, of a mixture, e.g. of o-, m- and p-xylenes, is separated by directly contacting the mixture in countercurrent flow with a substantially immiscible liquid refrigerant whereby crystals of the component form, the refrigerant being one in which the crystals become preferentially dispersed relative to the mother liquor, and the dispersion being removed and the crystals recovered. The interfacial tension of the refrigerant relative to the mother liquor preferably does not exceed 5 dynes/cm., and the crystals may be entrained with the aid of a stirrer. The refrigerant, e.g. at -45 to -80‹C, may be water containing a freezing- point depressant, e.g. methanol, a densityincreasing substance, e.g. CaCl 2 or glycol monomethyl ether, and a surfactant, e.g. Na dodecyl benzene sulphonate. The mother liquor may be recycled and the crystals washed twice, preferably with a liquid having the same composition as the refrigerant, at temperatures below their m.p., e.g. -40‹C and 0‹C for respective washes of p-xylene crystals.
GB22545/68A 1968-05-13 1968-05-13 Crystallization process Expired GB1263697A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB22545/68A GB1263697A (en) 1968-05-13 1968-05-13 Crystallization process
ES367139A ES367139A1 (en) 1968-05-13 1969-05-12 Crystallization process
NL6907236.A NL162562C (en) 1968-05-13 1969-05-12 METHOD FOR SEPARATING A SOLID FROM A LIQUID MIXTURE BY CRYSTALLIZATION
CA051260A CA927405A (en) 1968-05-13 1969-05-12 Crystallization process
DE19691924152 DE1924152C3 (en) 1968-05-13 1969-05-12 Process for crystallizing p-xylene from solutions with its isomers
FR6915235A FR2008376A1 (en) 1968-05-13 1969-05-12
SE06669/69A SE357730B (en) 1968-05-13 1969-05-12
BE732926D BE732926A (en) 1968-05-13 1969-05-12

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2254468 1968-05-13
GB22545/68A GB1263697A (en) 1968-05-13 1968-05-13 Crystallization process

Publications (1)

Publication Number Publication Date
GB1263697A true GB1263697A (en) 1972-02-16

Family

ID=26255980

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22545/68A Expired GB1263697A (en) 1968-05-13 1968-05-13 Crystallization process

Country Status (7)

Country Link
BE (1) BE732926A (en)
CA (1) CA927405A (en)
ES (1) ES367139A1 (en)
FR (1) FR2008376A1 (en)
GB (1) GB1263697A (en)
NL (1) NL162562C (en)
SE (1) SE357730B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5872259A (en) * 1991-12-18 1999-02-16 Reuter Chemischer Apparatebau Process for separating a substance from an aggregate mixture

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19617085A1 (en) * 1996-04-29 1997-10-30 Bayer Ag Process for the production of very fine crystallization products
CN112108086B (en) * 2020-09-24 2022-06-21 上海理工大学 Directional solidification segregation device and method for colloidal particle system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5872259A (en) * 1991-12-18 1999-02-16 Reuter Chemischer Apparatebau Process for separating a substance from an aggregate mixture

Also Published As

Publication number Publication date
FR2008376A1 (en) 1970-01-23
CA927405A (en) 1973-05-29
BE732926A (en) 1969-11-12
DE1924152B2 (en) 1975-08-28
SE357730B (en) 1973-07-09
NL162562B (en) 1980-01-15
ES367139A1 (en) 1971-04-01
DE1924152A1 (en) 1969-11-20
NL162562C (en) 1980-06-16
NL6907236A (en) 1969-11-17

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