EP0372208B1 - Verfahren zur Aufarbeitung von Rohteer - Google Patents

Verfahren zur Aufarbeitung von Rohteer Download PDF

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Publication number
EP0372208B1
EP0372208B1 EP89119677A EP89119677A EP0372208B1 EP 0372208 B1 EP0372208 B1 EP 0372208B1 EP 89119677 A EP89119677 A EP 89119677A EP 89119677 A EP89119677 A EP 89119677A EP 0372208 B1 EP0372208 B1 EP 0372208B1
Authority
EP
European Patent Office
Prior art keywords
pitch
column
tar
approximately
crude tar
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 - Lifetime
Application number
EP89119677A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0372208A1 (de
Inventor
Wilhelm Dr. Stewen
Hans-Jürgen Hasse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RAG AG
Original Assignee
Ruhrkohle AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ruhrkohle AG filed Critical Ruhrkohle AG
Publication of EP0372208A1 publication Critical patent/EP0372208A1/de
Application granted granted Critical
Publication of EP0372208B1 publication Critical patent/EP0372208B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C1/00—Working-up tar
    • C10C1/04—Working-up tar by distillation
    • C10C1/06—Removal of water

Definitions

  • the invention relates to a process for working up the raw tar obtained when coking coal, the raw tar being preheated to the dewatering column temperature and being fed to a dewatering column operated at normal pressure, the top product of the dewatering column being condensed and separated into light oil and water in a liquid separator and being anhydrous as a bottom product Tar is drawn off and partly heated to the pitch column temperature by an external heating furnace, partly by internal heat exchange with the products of a pitch column operated with negative pressure, and pitch is drawn off as the bottom product of the pitch column and dewatered and de-pitched raw tar is obtained as the top product of the pitch column.
  • the invention is based on the general task of simplifying the workup and making it more cost-effective.
  • the invention is based on the idea of initially dividing the raw tar into two fractions in a manner known per se. Although this could be done e.g. B. by a fractional raw gas condensation.
  • operating problems are to be expected due to the pitch's tendency to cake, particularly in connection with solids.
  • Pitch is obtained as the bottom product and an oil fraction as the top product, which is further processed into several sub-fractions, due to the temperature and pressure conditions in the pitch column and due to reflux (from anthracene oil 1) Pitch fraction is reduced in favor of the boiling fraction.
  • the disadvantage of this procedure which is generally used in central processing plants, is that a large amount of external energy in the form of thermal energy and mechanical energy (compressors and vacuum pumps) is required, complex multi-column distillation and large heating ovens and pumps are required, and the transport of the entire raw tar , including water and mechanical parts, causes high transportation costs.
  • the high-boiling Pechan part can be mixed with the coal during coking. This improves the coking properties and is particularly economical.
  • the thermal combination of the dewatering column or pitch column enables additional advantages to be achieved by using the top product and / or bottom product from the pitch column for preheating the raw tar and / or the bottom product from the dewatering column.
  • the tar drawn from the tar separators with water contents of about 4-5% by weight is first preheated to about 155 degrees C in heat exchangers (1) and (2) and into the dewatering column (3) guided. Dewatered tar is obtained as the bottom product and is fed to further heat exchangers.
  • the water / light oil mixture is drawn off at the top of the column, cooled in condensers (4) and separated from one another in separators (5). A portion of the light oil can be returned to the top of the column as reflux, the rest is recovered as a product and, for example, mixed with the tar that has been removed.
  • the tar drawn off as the bottom product of the dewatering column is preheated against tar vapors and pitch in further heat exchangers (6) and (7) and finally heated from approx. 320 ° C. to approx. 365 ° C.
  • the tar is divided into its pitch fraction and the lower-boiling components in the pitch column (9) operated at approx. 0.5 bar by vacuum flash evaporation without reflux.
  • the pitch's solidification point can e.g. can be adjusted by slight changes in the vacuum.
  • a vacuum pump is used to adjust the pressure.
  • the process has minimal energy requirements.
  • the minimum energy requirement is possible in particular with the selected pressure and temperature levels and the interconnection.
  • the raw tar fractions light oil and pitch are obtained, for which there are variable further processing options.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Working-Up Tar And Pitch (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Coke Industry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
EP89119677A 1988-12-05 1989-10-24 Verfahren zur Aufarbeitung von Rohteer Expired - Lifetime EP0372208B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3840928A DE3840928A1 (de) 1988-12-05 1988-12-05 Verfahren zur aufbereitung von rohteer
DE3840928 1988-12-05

Publications (2)

Publication Number Publication Date
EP0372208A1 EP0372208A1 (de) 1990-06-13
EP0372208B1 true EP0372208B1 (de) 1993-02-03

Family

ID=6368484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89119677A Expired - Lifetime EP0372208B1 (de) 1988-12-05 1989-10-24 Verfahren zur Aufarbeitung von Rohteer

Country Status (3)

Country Link
EP (1) EP0372208B1 (enrdf_load_stackoverflow)
JP (1) JPH02194088A (enrdf_load_stackoverflow)
DE (2) DE3840928A1 (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2196800C1 (ru) * 2001-08-13 2003-01-20 Казанское открытое акционерное общество "Органический синтез" Способ обработки и утилизации тяжелой пиролизной смолы
RU2223299C2 (ru) * 2002-02-21 2004-02-10 Казанское открытое акционерное общество "Органический синтез" Способ подготовки и утилизации тяжелой пиролизной смолы
JP4769435B2 (ja) * 2004-07-20 2011-09-07 Ｊｆｅケミカル株式会社 合成タール、溶融金属出湯口用閉塞材およびその製造方法
CN115433602B (zh) * 2022-08-31 2023-11-17 宝钢工程技术集团有限公司 用于焦油加工的脱水塔串联加热装置及其使用方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB127700A (en) * 1918-05-28 1919-05-28 Thomas Owston Wilton Improvements in or relating to the Continuous Dehydration and Distillation of Tar, or other Liquids and to Apparatus therefor.
GB191295A (en) * 1922-01-27 1923-01-11 Sigurd Walfrid Albert Wikner Improvements in the distillation of tar and the like
GB200651A (en) * 1922-05-22 1923-07-19 Still Carl Improvements in and relating to apparatus for dehydrating tar
US2673833A (en) * 1951-04-03 1954-03-30 Arthur H Radasch Distillation of coal tar
DE2624246C2 (de) * 1976-05-29 1986-02-20 Krupp-Koppers Gmbh, 4300 Essen Zweistufiges Verfahren und Vorrichtung zur Ausscheidung von Teer
JPS6213488A (ja) * 1985-07-10 1987-01-22 Nippon Steel Chem Co Ltd コ−ルタ−ルの蒸溜方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Ullmanns Encyclopadie der technischer Chemie 4 Auflage Band 22, Seiten 418-422 *

Also Published As

Publication number Publication date
DE58903456D1 (de) 1993-03-18
DE3840928A1 (de) 1990-06-07
JPH02194088A (ja) 1990-07-31
DE3840928C2 (enrdf_load_stackoverflow) 1991-02-07
JPH048471B2 (enrdf_load_stackoverflow) 1992-02-17
EP0372208A1 (de) 1990-06-13

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