ES435492A1 - Process for the recovery of high purity paraxylene - Google Patents
Process for the recovery of high purity paraxyleneInfo
- Publication number
- ES435492A1 ES435492A1 ES435492A ES435492A ES435492A1 ES 435492 A1 ES435492 A1 ES 435492A1 ES 435492 A ES435492 A ES 435492A ES 435492 A ES435492 A ES 435492A ES 435492 A1 ES435492 A1 ES 435492A1
- Authority
- ES
- Spain
- Prior art keywords
- paraxylene
- zone
- cake
- washing liquid
- separating
- 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
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 title abstract 30
- 238000000034 method Methods 0.000 title abstract 2
- 238000011084 recovery Methods 0.000 title 1
- 239000007788 liquid Substances 0.000 abstract 6
- 238000005406 washing Methods 0.000 abstract 6
- 239000012452 mother liquor Substances 0.000 abstract 3
- 239000013078 crystal Substances 0.000 abstract 2
- 238000002425 crystallisation Methods 0.000 abstract 2
- 230000008025 crystallization Effects 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000002002 slurry Substances 0.000 abstract 2
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- 230000005496 eutectics Effects 0.000 abstract 1
- 238000005194 fractionation Methods 0.000 abstract 1
- 239000011440 grout Substances 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 150000003738 xylenes Chemical class 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
- B01D11/0269—Solid material in other moving receptacles
- B01D11/0273—Solid material in other moving receptacles in rotating drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/02—Solvent extraction of solids
- B01D11/028—Flow sheets
-
- 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
- B01D9/0013—Crystallisation cooling by heat exchange by indirect 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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Procedure for separating paraxylene from a normally liquid mixture of xylene isomers and C8 aromatics, where the mixture is cooled in a crystallization zone to a temperature just above the paraxylene eutectic, to form a slurry of paraxylene crystals in the liquor mother of crystallization and the paraxylene crystals are separated from the mother liquor to recover the paraxylene product; characterized in that it comprises passing said slurry into a continuous feeding, multi-zone centrifugal separator unit, which has means for the entry of washing liquid in an intermediate zone; gravitationally separating a substantial portion of the mother liquor from the grout, in a first zone, to form a porous paraxylene cake having mother liquor occlusions trapped therein; washing said paraxylene cake in a second zone of said separating unit, with approximately 0.4 to 1.2 parts by weight of washing liquid per part of paraxylene cake, said washing liquid comprising a main portion of a C5 hydrocarbon at C8 and a minor portion of dissolved paraxylene; gravitationally separating a substantial portion of the washing liquid effluent from the washed paraxylene cake, in a third zone of said separating unit; passing said washed paraxylene cake from the separator unit into a melting tank where the paraxylene cake is melted; passing said molten paraxylene to a fractionation tower where the trapped washing liquid is distilled and a paraxylene product having a purity greater than 99% is recovered. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US44990974A | 1974-03-11 | 1974-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES435492A1 true ES435492A1 (en) | 1977-01-01 |
Family
ID=23785971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES435492A Expired ES435492A1 (en) | 1974-03-11 | 1975-03-11 | Process for the recovery of high purity paraxylene |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS50126624A (en) |
| BE (1) | BE826553A (en) |
| BR (1) | BR7501394A (en) |
| DD (1) | DD117669A5 (en) |
| DE (1) | DE2509182A1 (en) |
| ES (1) | ES435492A1 (en) |
| FR (1) | FR2263994A1 (en) |
| GB (1) | GB1493489A (en) |
| IT (1) | IT1029989B (en) |
| NL (1) | NL7502812A (en) |
| TR (1) | TR18478A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8200075A (en) * | 1982-01-11 | 1983-08-01 | Tno | METHOD FOR CONTINUALLY PARTIAL CRYSTALIZATION AND SEPARATION OF A LIQUID MIXTURE AND AN APPARATUS FOR CARRYING OUT THIS PROCESS. |
| US5498822A (en) * | 1994-04-04 | 1996-03-12 | Mobil Oil Corporation | Single temperature stage crystallization of paraxylene |
| FR2729660A1 (en) * | 1995-01-20 | 1996-07-26 | Inst Francais Du Petrole | PROCESS FOR PRODUCING PARAXYLENE HAVING HIGH TEMPERATURE CRYSTALLIZATION WITH AT LEAST ONE STAGE AND PARTIAL FUSION OF CRYSTALS |
| CN102372590B (en) * | 2010-08-23 | 2014-03-26 | 中国石油化工股份有限公司 | Crystallization method for preparing para-xylene from xylol |
| CN102372591B (en) * | 2010-08-23 | 2014-03-26 | 中国石油化工股份有限公司 | Crystallization method for p-xylene production |
| TW201240966A (en) * | 2011-03-18 | 2012-10-16 | Gtc Technology Us Llc | Energy recovery from mother liquid in paraxylene crystallization process |
| CN103772127B (en) * | 2012-10-25 | 2015-07-08 | 中国石油化工股份有限公司 | Method for producing p-xylene |
| CN103880582B (en) * | 2012-12-19 | 2015-08-12 | 中国石油化工股份有限公司 | P-Xylol multistage crystallization method |
| CN112679305B (en) * | 2019-10-18 | 2022-10-11 | 中国石油化工股份有限公司 | Method for producing p-xylene |
-
1975
- 1975-03-03 DE DE19752509182 patent/DE2509182A1/en active Pending
- 1975-03-10 BR BR1394/75A patent/BR7501394A/en unknown
- 1975-03-10 DD DD184668A patent/DD117669A5/xx unknown
- 1975-03-10 NL NL7502812A patent/NL7502812A/en unknown
- 1975-03-10 IT IT48512/75A patent/IT1029989B/en active
- 1975-03-11 BE BE154231A patent/BE826553A/en unknown
- 1975-03-11 JP JP50029423A patent/JPS50126624A/ja active Pending
- 1975-03-11 ES ES435492A patent/ES435492A1/en not_active Expired
- 1975-03-11 GB GB10118/75A patent/GB1493489A/en not_active Expired
- 1975-03-11 FR FR7507564A patent/FR2263994A1/fr not_active Withdrawn
- 1975-03-11 TR TR18478A patent/TR18478A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TR18478A (en) | 1977-02-24 |
| JPS50126624A (en) | 1975-10-04 |
| BE826553A (en) | 1975-09-11 |
| DE2509182A1 (en) | 1975-10-02 |
| GB1493489A (en) | 1977-11-30 |
| IT1029989B (en) | 1979-03-20 |
| DD117669A5 (en) | 1976-01-20 |
| FR2263994A1 (en) | 1975-10-10 |
| BR7501394A (en) | 1975-12-09 |
| NL7502812A (en) | 1975-09-15 |
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