GB1292812A - Separation process - Google Patents
Separation processInfo
- Publication number
- GB1292812A GB1292812A GB6986/69A GB698669A GB1292812A GB 1292812 A GB1292812 A GB 1292812A GB 6986/69 A GB6986/69 A GB 6986/69A GB 698669 A GB698669 A GB 698669A GB 1292812 A GB1292812 A GB 1292812A
- Authority
- GB
- United Kingdom
- Prior art keywords
- crystals
- separated
- liquor
- solution
- separation
- 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
-
- 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
- B01D9/0059—General arrangements of crystallisation plant, e.g. flow sheets
-
- 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)
- Crystallography & Structural Chemistry (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (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)
Abstract
1292812 Crystal separation process IMPERIAL CHEMICAL INDUSTRIES Ltd 26 Jan 1970 [10 Feb 1969] 6986/69 Heading B1G The separation of a crystallisable component from a solution thereof is carried out by a process in which crystals of the said crystalisable component are firstly produced by chilling of the solution (step 1), which crystals are separated from the mother liquor (step 2) and remelted to produce a second solution (step 3), chilling being carried out on this (step 4) to obtain a second crystal slurry, at least some of these crystals being separated from the mother liquor. These crystals are product and removed at 10. The liquor resulting is optionally divided into two streams, one of which is recycled to the second solution at 3, along with some crystals, and the other chilled (step 6) to produce further crystals and a liquor which is recycled to the first solution (at 1). The crystals (separated at 7) may be used for product or are recycled to either 3 or 4. The separators may be either filters or centrifuges, a centrifuge being preferably used at step 5. At steps 5 and 7 the crystals and mother liquor may be washed using, e.g. a C 4 or C 6 paraffin such as pentane, or paraxylene, the mother liquor and the melted crystals (after separation) being distilled to remove the wash liquor. The liquor 9 separated at the first separation may go to an isomerisation plant to be used as further feedstock. An Example is given wherein paraxylene is separated from other xylenes and ethyl benzene.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6986/69A GB1292812A (en) | 1969-02-10 | 1969-02-10 | Separation process |
| CA073573A CA929458A (en) | 1969-02-10 | 1970-01-30 | Separation process |
| DE2004827A DE2004827C3 (en) | 1969-02-10 | 1970-02-03 | Process for separating a crystallizable component from a solution |
| NL7001668.A NL165384C (en) | 1969-02-10 | 1970-02-05 | METHOD FOR SEPARATING A CRYSTALLISABLE SUBSTANCE |
| FR7004458A FR2035219A5 (en) | 1969-02-10 | 1970-02-09 | |
| JP1140470A JPS5546202B1 (en) | 1969-02-10 | 1970-02-10 | |
| BE745775D BE745775A (en) | 1969-02-10 | 1970-02-10 | SEPARATION PROCESS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB6986/69A GB1292812A (en) | 1969-02-10 | 1969-02-10 | Separation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1292812A true GB1292812A (en) | 1972-10-11 |
Family
ID=9824469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB6986/69A Expired GB1292812A (en) | 1969-02-10 | 1969-02-10 | Separation process |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5546202B1 (en) |
| BE (1) | BE745775A (en) |
| CA (1) | CA929458A (en) |
| DE (1) | DE2004827C3 (en) |
| FR (1) | FR2035219A5 (en) |
| GB (1) | GB1292812A (en) |
| NL (1) | NL165384C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5498822A (en) * | 1994-04-04 | 1996-03-12 | Mobil Oil Corporation | Single temperature stage crystallization of paraxylene |
| US5448005A (en) * | 1994-04-04 | 1995-09-05 | Mobil Oil Corporation | Crystallization of paraxlene from high purity paraxylene feeds |
| JP7055326B2 (en) * | 2017-09-15 | 2022-04-18 | 株式会社ササクラ | Development waste liquid treatment equipment and treatment method |
-
1969
- 1969-02-10 GB GB6986/69A patent/GB1292812A/en not_active Expired
-
1970
- 1970-01-30 CA CA073573A patent/CA929458A/en not_active Expired
- 1970-02-03 DE DE2004827A patent/DE2004827C3/en not_active Expired
- 1970-02-05 NL NL7001668.A patent/NL165384C/en not_active IP Right Cessation
- 1970-02-09 FR FR7004458A patent/FR2035219A5/fr not_active Expired
- 1970-02-10 BE BE745775D patent/BE745775A/en not_active IP Right Cessation
- 1970-02-10 JP JP1140470A patent/JPS5546202B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL7001668A (en) | 1970-08-12 |
| FR2035219A5 (en) | 1970-12-18 |
| JPS5546202B1 (en) | 1980-11-21 |
| CA929458A (en) | 1973-07-03 |
| BE745775A (en) | 1970-08-10 |
| DE2004827C3 (en) | 1980-04-24 |
| DE2004827B2 (en) | 1975-01-23 |
| DE2004827A1 (en) | 1970-09-03 |
| NL165384C (en) | 1981-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |