GB1263697A - Crystallization process - Google Patents
Crystallization processInfo
- 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
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.
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB22545/68A GB1263697A (en) | 1968-05-13 | 1968-05-13 | Crystallization process |
FR6915235A FR2008376A1 (en) | 1968-05-13 | 1969-05-12 | |
BE732926D BE732926A (en) | 1968-05-13 | 1969-05-12 | |
ES367139A ES367139A1 (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 |
SE06669/69A SE357730B (en) | 1968-05-13 | 1969-05-12 | |
CA051260A CA927405A (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 |
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)
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)
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 |
-
1968
- 1968-05-13 GB GB22545/68A patent/GB1263697A/en not_active Expired
-
1969
- 1969-05-12 NL NL6907236.A patent/NL162562C/en not_active IP Right Cessation
- 1969-05-12 SE SE06669/69A patent/SE357730B/xx unknown
- 1969-05-12 ES ES367139A patent/ES367139A1/en not_active Expired
- 1969-05-12 CA CA051260A patent/CA927405A/en not_active Expired
- 1969-05-12 BE BE732926D patent/BE732926A/xx unknown
- 1969-05-12 FR FR6915235A patent/FR2008376A1/fr not_active Withdrawn
Cited By (1)
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 |
---|---|
SE357730B (en) | 1973-07-09 |
DE1924152B2 (en) | 1975-08-28 |
CA927405A (en) | 1973-05-29 |
FR2008376A1 (en) | 1970-01-23 |
ES367139A1 (en) | 1971-04-01 |
NL162562C (en) | 1980-06-16 |
NL6907236A (en) | 1969-11-17 |
DE1924152A1 (en) | 1969-11-20 |
NL162562B (en) | 1980-01-15 |
BE732926A (en) | 1969-11-12 |
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