GB338638A - Improved process for extracting phenols from phenolic tar oils - Google Patents

Improved process for extracting phenols from phenolic tar oils

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Publication number
GB338638A
GB338638A GB2765829A GB2765829A GB338638A GB 338638 A GB338638 A GB 338638A GB 2765829 A GB2765829 A GB 2765829A GB 2765829 A GB2765829 A GB 2765829A GB 338638 A GB338638 A GB 338638A
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GB
United Kingdom
Prior art keywords
carbon dioxide
phenols
oils
alkali
oil
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
GB2765829A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2765829A priority Critical patent/GB338638A/en
Publication of GB338638A publication Critical patent/GB338638A/en
Expired legal-status Critical Current

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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

338,638. Perilhou, E. Sept. 11, 1929. Phenols are separated from phenolic tar oils of any kind by treating such oils with aqueous, solutions of alkali carbonates under pressure and at temperatures above 100‹ C. while continuously allowing the carbon dioxide formed to escape, isolating the phenates thus produced, and then preferably decomposing the latter with the carbon dioxide liberated in the first stage of the process in order to regenerate the phenols. Phenol itself reacts with alkali carbonates more readily than the cresols, so that by using a limited quantity of carbonate the alkali phenate may be separated first, further carbonate being then used to extract the cresolates. In an example, a phenolic oil is heated to 170‹ C. in an autoclave with a solution of sodium carbonate under a pressure of 8 kg. per sq. cm. The carbon dioxide produced is continuously withdrawn at this pressure by means of accurately adjusted cocks on an outlet pipe arranged at the upper end of a reflux condenser which returns condensible vapours to the autoclave. The sodium phenate solution is decanted under pressure, which is then released to cause it to give up dissolved hydrocarbons. The carbon dioxide produced in the first stage is used to acidify a previous yield of phenates, giving crude phenol and a solution of sodium carbonate which is used for treating fresh tar oil. If the first extraction is insufficient to remove all the phenols from the oil, the process may be repeated. In another example, the treatment of the phenolic oils with alkali carbonate solutions is carried out on the counter-current principle in a steel column filled with Raschig rings and heated by an axial steam pipe to 170‹ C. The oil is injected by means of a measuring pump at the base, while the sodium carbonate solution enters at the top. Carbon dioxide leaves at the top through a reflux condenser and outlet pipe at such a rate that the pressure in the column is kept at about 8 kg; per sq. cm. The alkali phenates are withdrawn at the foot of the column, and the oils freed from phenols leave at the top.
GB2765829A 1929-09-11 1929-09-11 Improved process for extracting phenols from phenolic tar oils Expired GB338638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2765829A GB338638A (en) 1929-09-11 1929-09-11 Improved process for extracting phenols from phenolic tar oils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2765829A GB338638A (en) 1929-09-11 1929-09-11 Improved process for extracting phenols from phenolic tar oils

Publications (1)

Publication Number Publication Date
GB338638A true GB338638A (en) 1930-11-27

Family

ID=10263144

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2765829A Expired GB338638A (en) 1929-09-11 1929-09-11 Improved process for extracting phenols from phenolic tar oils

Country Status (1)

Country Link
GB (1) GB338638A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1145627B (en) * 1958-09-20 1963-03-21 Metallgesellschaft Ag Process for the production of pure phenols from phenol-containing oils or crude phenols
CN109553236A (en) * 2018-05-31 2019-04-02 张庆华 The process flow containing ammonia nitrogen, phenol wastewater is administered in controllable concentration

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1145627B (en) * 1958-09-20 1963-03-21 Metallgesellschaft Ag Process for the production of pure phenols from phenol-containing oils or crude phenols
CN109553236A (en) * 2018-05-31 2019-04-02 张庆华 The process flow containing ammonia nitrogen, phenol wastewater is administered in controllable concentration

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