GB911321A - Process for the dealkylation of aromatic compounds - Google Patents

Process for the dealkylation of aromatic compounds

Info

Publication number
GB911321A
GB911321A GB1630560A GB1630560A GB911321A GB 911321 A GB911321 A GB 911321A GB 1630560 A GB1630560 A GB 1630560A GB 1630560 A GB1630560 A GB 1630560A GB 911321 A GB911321 A GB 911321A
Authority
GB
United Kingdom
Prior art keywords
salt
hydrogen
salts
hydrocarbon
molten
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
GB1630560A
Inventor
Pieter Visser
Gerrit Van Der Most
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to GB1630560A priority Critical patent/GB911321A/en
Priority to DES73878A priority patent/DE1175212B/en
Publication of GB911321A publication Critical patent/GB911321A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
    • C07C4/08—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
    • B01J10/005—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor carried out at high temperatures in the presence of a molten material
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
    • C07C4/08—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule
    • C07C4/12—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene
    • C07C4/14—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by splitting-off an aliphatic or cycloaliphatic part from the molecule from hydrocarbons containing a six-membered aromatic ring, e.g. propyltoluene to vinyltoluene splitting taking place at an aromatic-aliphatic bond
    • C07C4/16—Thermal processes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

Alkyl aromatic hydrocarbons are dealkylated in the presence of hydrogen at elevated temperature by contact with a molten salt or a mixture of molten salts. Suitable conditions are 700-1200 DEG C., 0.01-0.1 sec., 1-40 atm. abs. and a hydrogen to hydrocarbon mol ratio of 1-20. The reactants may be passed through the molten salt(s) but preferably the salt is entrained in the feed. In the drawing, hydrocarbons and hydrogen enter by lines 9 and 11 and entrain molten salt at 4. The salt is separated at the top of reactor 1 and passes by liquid seal 8 into the regenerator 2, surrounding the reactor, where the salt is regenerated <PICT:0911321/IV (b)/1> and heated by oxygen, with added fuel or flue gas if necessary, from line 14. The product is quenched, e.g. with steam from inlets 20. If desired, hydrogen may be supplied by cracking a hydrocarbon yielding hydrogen by contact with the salt before introducing the hydrocarbon to be dealkylated. Suitable salts are hardening salts used in metallurgy, alkali metal, particularly potassium, sulphates or chlorides or their double salts or other metal chlorides, sulphides or cyanides. When using mixtures, these preferably corresponding to the eutectic point. Specification 859,079 is referred to.
GB1630560A 1960-05-09 1960-05-09 Process for the dealkylation of aromatic compounds Expired GB911321A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1630560A GB911321A (en) 1960-05-09 1960-05-09 Process for the dealkylation of aromatic compounds
DES73878A DE1175212B (en) 1960-05-09 1961-05-08 Process for the dealkylation of aromatic or cycloaliphatic hydrocarbons with the addition of hydrogen-containing gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1630560A GB911321A (en) 1960-05-09 1960-05-09 Process for the dealkylation of aromatic compounds

Publications (1)

Publication Number Publication Date
GB911321A true GB911321A (en) 1962-11-21

Family

ID=10074904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1630560A Expired GB911321A (en) 1960-05-09 1960-05-09 Process for the dealkylation of aromatic compounds

Country Status (2)

Country Link
DE (1) DE1175212B (en)
GB (1) GB911321A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015388A1 (en) * 1995-10-27 1997-05-01 Urea Casale S.A. Hydrolysis reactor for removal of urea, ammonia and carbon dioxide from a liquid phase comprising urea in aqueous solution

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE688152C (en) * 1938-06-28 1940-02-14 I G Farbenindustrie Akt Ges Saltpeter baths resistant to decomposition
DE1005945B (en) * 1951-02-07 1957-04-11 Exxon Research Engineering Co Process for the thermal dealkylation of aromatic hydrocarbons

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997015388A1 (en) * 1995-10-27 1997-05-01 Urea Casale S.A. Hydrolysis reactor for removal of urea, ammonia and carbon dioxide from a liquid phase comprising urea in aqueous solution

Also Published As

Publication number Publication date
DE1175212B (en) 1964-08-06

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