ES367139A1 - Crystallization process - Google Patents
Crystallization processInfo
- Publication number
- ES367139A1 ES367139A1 ES367139A ES367139A ES367139A1 ES 367139 A1 ES367139 A1 ES 367139A1 ES 367139 A ES367139 A ES 367139A ES 367139 A ES367139 A ES 367139A ES 367139 A1 ES367139 A1 ES 367139A1
- Authority
- ES
- Spain
- 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
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.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22545/68A GB1263697A (en) | 1968-05-13 | 1968-05-13 | Crystallization process |
| GB2254468 | 1968-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES367139A1 true ES367139A1 (en) | 1971-04-01 |
Family
ID=26255980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES367139A Expired ES367139A1 (en) | 1968-05-13 | 1969-05-12 | 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) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9126832D0 (en) | 1991-12-18 | 1992-02-19 | Sandoz Ltd | Separation process |
| 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 ES ES367139A patent/ES367139A1/en not_active Expired
- 1969-05-12 BE BE732926D patent/BE732926A/xx unknown
- 1969-05-12 SE SE06669/69A patent/SE357730B/xx unknown
- 1969-05-12 CA CA051260A patent/CA927405A/en not_active Expired
- 1969-05-12 NL NL6907236.A patent/NL162562C/en not_active IP Right Cessation
- 1969-05-12 FR FR6915235A patent/FR2008376A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR2008376A1 (en) | 1970-01-23 |
| NL162562C (en) | 1980-06-16 |
| CA927405A (en) | 1973-05-29 |
| BE732926A (en) | 1969-11-12 |
| SE357730B (en) | 1973-07-09 |
| GB1263697A (en) | 1972-02-16 |
| DE1924152B2 (en) | 1975-08-28 |
| NL162562B (en) | 1980-01-15 |
| NL6907236A (en) | 1969-11-17 |
| DE1924152A1 (en) | 1969-11-20 |
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