GB776145A - Improvements in or relating to the working up of crude benzene - Google Patents

Improvements in or relating to the working up of crude benzene

Info

Publication number
GB776145A
GB776145A GB1276753A GB1276753A GB776145A GB 776145 A GB776145 A GB 776145A GB 1276753 A GB1276753 A GB 1276753A GB 1276753 A GB1276753 A GB 1276753A GB 776145 A GB776145 A GB 776145A
Authority
GB
United Kingdom
Prior art keywords
fractions
benzene
bases
fraction
distillation
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
Application number
GB1276753A
Inventor
Albrecht Eisenberg
Karl Peter
Max Pernecker
Herbert Ritter
Lothar Koster
Fritz Brodkorb
Fritz Wiegner
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.)
Gelsenkirchener Bergwerks AG
Original Assignee
Gelsenkirchener Bergwerks 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 Gelsenkirchener Bergwerks AG filed Critical Gelsenkirchener Bergwerks AG
Priority to GB1276753A priority Critical patent/GB776145A/en
Publication of GB776145A publication Critical patent/GB776145A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C7/00—Purification; Separation; Use of additives
    • C07C7/005—Processes comprising at least two steps in series

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (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

Purified fractions are produced from crude benzene containing pyridine bases and unsaturated compounds by pressure refining, comprising fractionally distilling the crude benzene to give a number of fractions in such a way that the said bases and the said unsaturated compounds are concentrated in some of these fractions, removing the said bases by treatment with dilute acid and removing, or recovering, the unsaturated compounds from these last-mentioned fractions by known means and then subjecting at least some of the fractions to pressure hydrogenation either severally or in admixture. In an example, crude benzene is fractionally distilled into the following fractions: (1) pre-runnings containing cyclopentadiene, (2) benzene containing 0.3 per cent cyclopentadiene, (3) benzene-toluene mixture, (4) toluene, (5) xylene containing styrene, (6) "solvent naphtha" containing coumarone and indene, and (7) materials boiling above 180 DEG C. Fraction 1 is heated in a pressurized vessel at 100 to convert cyclopentadiene to dicyclopentadiene, and the lower-boiling material is separated therefrom by distillation and added to fraction 3. Fractions 2, 3, 4 and 5 are washed with dilute sulphuric acid to remove pyridine bases in the form of sulphates which may be decomposed with sodium hydroxide and the free bases thus obtained may be separated by distillation. Fractions 2, 3 and 4 and then separately pressure hydrogenated by preheating and passing with hydrogen over a hydrogenation catalyst at 30-100 atmospheres gauge and at 300-450 DEG C. giving respectively pure benzene, benzine and pure toluene. Fraction 5 is freed from m- and p-xylene and the styrene is converted to polystyrene by boiling under reflux. The remaining o-xylene is separated therefrom by distillation and pressure hydrogenated with the m- and p-xylenes to give pure xylenes. Fraction 6 is freed of phenols, treated with dilute acid to remove bases, and then with concentrated sulphuric acid to polymerize coumarone and indene. The resulting coumarone-indene resin is separated from the remaining heavy benzene by vacuum distillation. From fraction 7, naphthalene is obtained by fractional distillation and worked up to tetrahydronaphthalene or hexahydrophenol, and the higher boiling wash oil is returned to the benzene recovery plant.
GB1276753A 1953-05-07 1953-05-07 Improvements in or relating to the working up of crude benzene Expired GB776145A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1276753A GB776145A (en) 1953-05-07 1953-05-07 Improvements in or relating to the working up of crude benzene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1276753A GB776145A (en) 1953-05-07 1953-05-07 Improvements in or relating to the working up of crude benzene

Publications (1)

Publication Number Publication Date
GB776145A true GB776145A (en) 1957-06-05

Family

ID=10010752

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1276753A Expired GB776145A (en) 1953-05-07 1953-05-07 Improvements in or relating to the working up of crude benzene

Country Status (1)

Country Link
GB (1) GB776145A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102603616A (en) * 2012-03-27 2012-07-25 济南圣泉唐和唐生物科技有限公司 Method for refining pyridine
CN104371760A (en) * 2014-10-15 2015-02-25 上海建安化工设计有限公司 Heavy benzene hydrogenation working circulation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102603616A (en) * 2012-03-27 2012-07-25 济南圣泉唐和唐生物科技有限公司 Method for refining pyridine
CN102603616B (en) * 2012-03-27 2014-04-16 济南卡博唐生物科技有限公司 Method for refining pyridine
CN104371760A (en) * 2014-10-15 2015-02-25 上海建安化工设计有限公司 Heavy benzene hydrogenation working circulation method

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