CS274233B1 - Method of waste waters treatment that result from ethylbenzene production during benzene's alkylation by ethylene in friedel-crafts reaction - Google Patents
Method of waste waters treatment that result from ethylbenzene production during benzene's alkylation by ethylene in friedel-crafts reaction Download PDFInfo
- Publication number
- CS274233B1 CS274233B1 CS803788A CS803788A CS274233B1 CS 274233 B1 CS274233 B1 CS 274233B1 CS 803788 A CS803788 A CS 803788A CS 803788 A CS803788 A CS 803788A CS 274233 B1 CS274233 B1 CS 274233B1
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- CS
- Czechoslovakia
- Prior art keywords
- alkylation
- friedel
- ethylene
- crafts reaction
- separated
- Prior art date
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- 239000002351 wastewater Substances 0.000 title claims abstract description 18
- YNQLUTRBYVCPMQ-UHFFFAOYSA-N Ethylbenzene Chemical compound CCC1=CC=CC=C1 YNQLUTRBYVCPMQ-UHFFFAOYSA-N 0.000 title claims abstract description 16
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 238000005804 alkylation reaction Methods 0.000 title claims abstract description 9
- 230000029936 alkylation Effects 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000005727 Friedel-Crafts reaction Methods 0.000 title claims abstract description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 4
- 239000005977 Ethylene Substances 0.000 title claims abstract description 4
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 11
- 239000003513 alkali Substances 0.000 claims 1
- 238000004062 sedimentation Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- 229910021502 aluminium hydroxide Inorganic materials 0.000 abstract 1
- 159000000013 aluminium salts Chemical class 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- KVNYFPKFSJIPBJ-UHFFFAOYSA-N 1,2-diethylbenzene Chemical compound CCC1=CC=CC=C1CC KVNYFPKFSJIPBJ-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 239000002168 alkylating agent Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Description
Při výrobě etylbenzenu alkylací benzenu Friedel-Craftsovou reakcí se používá katalyzátorového komplexu, který se periodicky připravuje nadávkováním potřebného množství chloridu hlinitého do teplého dietylbenzenu a po příslušném naředění vodou se kontinuálně čerpá do alkylátorů. Po ukončení alkylačních reakcí odcházejí odpadní vody obsahující sloučeniny hliníku jednak z kyselého dělení, absorpční kolony a vodní absorpční kolony do jímky, odkud se čerpají do proudu odpadních vod k čištění. Toto uspořádání má řadu nevýhod, z nichž nejzávažnější je, že při smísení s odpadními vodami dochází často k vylučování hydroxidu hlinitého v potrubí, což vede k snižování jeho průchodnosti, dále dochází k rychlému zanášení kalových prostor sedimentačních nádrží, což se projevuje zvyšováním potřeby elektrické energie na jejich vyklízení a zejména dochází ke ztrátám hliníkové suroviny.In the production of ethylbenzene by alkylation of benzene by the Friedel-Crafts reaction, a catalyst complex is used, which is periodically prepared by dosing the necessary amount of aluminum chloride into warm diethylbenzene and, after appropriate dilution with water, continuously pumped into the alkylators. After the alkylation reactions have been completed, the waste waters containing the aluminum compounds are separated from the acid separation, the absorption column and the water absorption column into the sump from where they are pumped into the waste water stream for purification. This arrangement has a number of drawbacks, the most important of which is that, when mixed with wastewater, aluminum hydroxide is often excreted in the pipeline, resulting in reduced throughput, and rapid sedimentation of the sedimentation tank sludge space resulting in an increase in electricity demand. for their clearing and, in particular, losses of aluminum raw material.
Uvedené nedostatky řeši způsob zpracování odpadních vod vznikajících při výrobě etylbenzenu alkylací benzenu etylenem Friedel - Craftsovou reakcí, který spočívá podle vynálezu v tom, že odpadní vody se oddělí z alkylačního produktu, jejich pH se upraví přídavkem alkálií na hodnotu 5,0 až 9,0 s výhodou 7,0 až 7,6, vzniklý hydroxid hlinitý se ve formě vločku oddělí od odpadní vody sedimentací v délce trvání 30 až 1Θ0 minut, s výhodou 60 až 120 minut. A potom se odpadní voda a oddělený hydroxid hlinitý odvádí k dalšímu zpracování.The aforementioned drawbacks are solved by a process for the treatment of the waste water resulting from the production of ethylbenzene by alkylation of benzene with an ethylene Friedel-Crafts reaction, which consists in separating the waste water from the alkylation product, adjusting its pH to 5.0 to 9.0 preferably 7.0 to 7.6, the formed aluminum hydroxide in flake form is separated from the waste water by sedimentation for a duration of 30 to 10 minutes, preferably 60 to 120 minutes. And then the waste water and the separated aluminum hydroxide are sent for further processing.
Provedení vynálezu je objasněno v následujících příkladech:An embodiment of the invention is illustrated in the following examples:
PřikladlHe did
Z celkového množství odpadních vod z výroby etylbenzenu v množství 20 až 30 m^ . h ' 3 -1 se oddělí 10 až 15 m . h procesních vod obsahujících převážné množství hlinitých solí odpadajících při výrobě etylbenzenu. Tyto vody se tangenciálně zavádějí do spodku stojaté válcové nádrže o objemu 20 m^ s kuželovitým dnem, přičemž před jejich vstupem do nádrže se do nich dávkuje roztok hydroxidu sodného do výsledného pH po smísení v rozmezí 7,2 a 7,6. Vyloučený a odsedimentovaný hydroxid hlinitý se odtahuje ze spodku nádrže, voda zbavená hlinitých solí odcházela přes přepadové hrany umístěné po horním obvodu nádrže do proudu odpadních vod. Zahuštěný hydroxid hlinitý, cca 3 % sušiny, se odvádí k dalšímu odvodňování. Po zahuštění na cca 20 až 30 % sušiny se dále hydroxid hlinitý předsuší a v následujícím kroku vyžíhá na oxid hlinitý. Získá se oxid hlinitý v množství 320 až 400 t . r 1 , pro další zpracování.Of the total amount of waste water from the production of ethylbenzene in an amount of 20 to 30 m 2. h '3 -1 is separated by 10 to 15 m. (h) process waters containing the bulk of aluminum salts that are lost during the production of ethylbenzene. These waters are tangentially introduced into the bottom of a 20 m < 3 > cylindrical cylindrical tank with a conical bottom, the sodium hydroxide solution being metered into the final pH after mixing between 7.2 and 7.6 before entering the tank. The precipitated and de-sedimented aluminum hydroxide is withdrawn from the bottom of the tank; Concentrated aluminum hydroxide, approx. 3% solids, is drained for further dewatering. After concentration to about 20 to 30% dry matter, the aluminum hydroxide is further pre-dried and calcined to aluminum oxide in the next step. Alumina in an amount of 320 to 400 t is obtained. r 1 , for further processing.
Příklad 2Example 2
Kyselé odpadní vody z výroby etylbenzenu se odvedou do nádrže, kde se jejich pH upraví roztokem hydroxidu sodného v rozmezí 6,2 až 6,8. Po promíchání nádrže se její obsah ponechá po dobu 120 minut v klidu. Usazený vloček hydroxidu hlinitého se podrobí strojnímu zahuštění a zahuštěný hydroxid hlinitý se předá k dalšímu zpracování.The acid waste water from the ethylbenzene production is discharged into a tank where its pH is adjusted with a sodium hydroxide solution in the range of 6.2 to 6.8. After the tank has been stirred, its contents are allowed to stand for 120 minutes. The deposited aluminum hydroxide flake is subjected to machine thickening and the concentrated aluminum hydroxide is passed on for further processing.
Získaný oxid hlinitý lze využit v hutím zpracování na hliník nebo ve sklárnách nebo keramických závodech. Další výhoda vynálezu spočívá v tom, že nedochází ke znehodnocování biologických kalů hlinitými solemi, což umožňuje jejich -další využití ke hnojení půdy, popřípadě jejich zpracování na kompost.The obtained alumina can be utilized in metallurgical processing to aluminum or in glassworks or ceramic plants. A further advantage of the invention is that biological sludge does not deteriorate with aluminum salts, which makes it possible to use them further for fertilizing the soil or for processing them into compost.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS803788A CS274233B1 (en) | 1988-12-06 | 1988-12-06 | Method of waste waters treatment that result from ethylbenzene production during benzene's alkylation by ethylene in friedel-crafts reaction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS803788A CS274233B1 (en) | 1988-12-06 | 1988-12-06 | Method of waste waters treatment that result from ethylbenzene production during benzene's alkylation by ethylene in friedel-crafts reaction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS803788A1 CS803788A1 (en) | 1990-09-12 |
| CS274233B1 true CS274233B1 (en) | 1991-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS803788A CS274233B1 (en) | 1988-12-06 | 1988-12-06 | Method of waste waters treatment that result from ethylbenzene production during benzene's alkylation by ethylene in friedel-crafts reaction |
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| CS (1) | CS274233B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12312304B2 (en) | 2021-09-14 | 2025-05-27 | CCTEG CHINA COAL Research Institute | Method for continuous synthesis of acylnaphthalene with acylation liquid |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249697A (en) * | 2018-01-09 | 2018-07-06 | 上海化学试剂研究所有限公司 | A kind of processing method for the aluminium wastewater that Friedel-Crafts reaction generates |
| CN114890623B (en) * | 2022-05-16 | 2023-07-04 | 煤炭科学技术研究院有限公司 | Acylation wastewater treatment process and system capable of recycling resources |
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1988
- 1988-12-06 CS CS803788A patent/CS274233B1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12312304B2 (en) | 2021-09-14 | 2025-05-27 | CCTEG CHINA COAL Research Institute | Method for continuous synthesis of acylnaphthalene with acylation liquid |
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| Publication number | Publication date |
|---|---|
| CS803788A1 (en) | 1990-09-12 |
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