GB619856A - An improved method for dehydrating and purifying in a continuous operation raw phenols extracted from coal tar - Google Patents

An improved method for dehydrating and purifying in a continuous operation raw phenols extracted from coal tar

Info

Publication number
GB619856A
GB619856A GB27340/45A GB2734045A GB619856A GB 619856 A GB619856 A GB 619856A GB 27340/45 A GB27340/45 A GB 27340/45A GB 2734045 A GB2734045 A GB 2734045A GB 619856 A GB619856 A GB 619856A
Authority
GB
United Kingdom
Prior art keywords
phenols
sulphuretted
boiler
ammonia
impurities
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
GB27340/45A
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.)
EXPL DES PROCEDES DER HALDE AB
Original Assignee
EXPL DES PROCEDES DER HALDE AB
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 EXPL DES PROCEDES DER HALDE AB filed Critical EXPL DES PROCEDES DER HALDE AB
Publication of GB619856A publication Critical patent/GB619856A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C37/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring
    • C07C37/005—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by obtaining phenols from products, waste products or side-products of processes, not directed to the production of phenols, by conversion or working-up
    • C07C37/007—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom of a six-membered aromatic ring by obtaining phenols from products, waste products or side-products of processes, not directed to the production of phenols, by conversion or working-up from the tar industry

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

<PICT:0619856/III/1> Coal tar phenols are dehydrated and freed from sulphuretted impurities by subjecting them to a continuous dehydration in a plate column working under a vacuum, e.g. at an absolute pressure of about half an atmosphere, and connected to a boiler having a temperature of 120 DEG to 130 DEG C. Hydrogen peroxide or a mixture of oxygen and ammonia or a mixture of air and ammonia may be mixed with the raw phenols to decompose sulphuretted impurities in the column. Coat tar phenols are pumped from tank 1 through a temperature exchanger 3 and conduit 5 to the top of plate column 4 which is heated by the boiler 6 and evacuated by pump 14. The dehydrated phenols are withdrawn from the boiler and then flow through the temperature exchange 3, wherein they give up their heat to fresh raw phenols, into a tank 9 from which they may be pumped into a rectifying apparatus, as described for example in Specification 619,857. The vapours leaving the column 4 are condensed in the cooling apparatus 12. The condensate is withdrawn through barometric leg 15.ALSO:Coal tar phenols are dehydrated and freed from sulphuretted impurities by subjecting them to a continuous dehydration in a plate column working under a vacuum, e.g. at an absolute pressure of about half an atmosphere, and connected to a boiler having a temperature of 120 DEG to 130 DEG C. Hydrogen peroxide, or a mixture of oxygen and ammonia or air and ammonia may be mixed with the phenols to decompose sulphuretted impurities in the dehydration column. Specification 619,857, [Group III], is referred to.
GB27340/45A 1942-04-24 1945-10-18 An improved method for dehydrating and purifying in a continuous operation raw phenols extracted from coal tar Expired GB619856A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR619856X 1942-04-24

Publications (1)

Publication Number Publication Date
GB619856A true GB619856A (en) 1949-03-16

Family

ID=8983971

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27340/45A Expired GB619856A (en) 1942-04-24 1945-10-18 An improved method for dehydrating and purifying in a continuous operation raw phenols extracted from coal tar

Country Status (1)

Country Link
GB (1) GB619856A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087969A (en) * 1961-03-29 1963-04-30 Dow Chemical Co Method for purifying aromatic compounds
DE1157236B (en) * 1960-09-28 1963-11-14 Ruetgerswerke Ag Process for the separation of foul-smelling and discoloration-causing accompanying substances from raw phenols

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1157236B (en) * 1960-09-28 1963-11-14 Ruetgerswerke Ag Process for the separation of foul-smelling and discoloration-causing accompanying substances from raw phenols
US3087969A (en) * 1961-03-29 1963-04-30 Dow Chemical Co Method for purifying aromatic compounds

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