GB1261589A - Terephthalic acid recovery - Google Patents

Terephthalic acid recovery

Info

Publication number
GB1261589A
GB1261589A GB2649069A GB2649069A GB1261589A GB 1261589 A GB1261589 A GB 1261589A GB 2649069 A GB2649069 A GB 2649069A GB 2649069 A GB2649069 A GB 2649069A GB 1261589 A GB1261589 A GB 1261589A
Authority
GB
United Kingdom
Prior art keywords
terephthalic acid
pressure
liquid phase
temperature
water
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
GB2649069A
Inventor
George Peter Olsen
Philip Hamilton Towle
Richard Harold Baldwin
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.)
Standard Oil Co
Original Assignee
Standard Oil Co
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 Standard Oil Co filed Critical Standard Oil Co
Priority to GB2649069A priority Critical patent/GB1261589A/en
Priority to BG012320A priority patent/BG15545A3/en
Publication of GB1261589A publication Critical patent/GB1261589A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/42—Separation; Purification; Stabilisation; Use of additives
    • C07C51/43—Separation; Purification; Stabilisation; Use of additives by change of the physical state, e.g. crystallisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1,261,589. Terephthalic acid recovery. STANDARD OIL CO. 23 May, 1969, No. 26490/69. Heading C2C. A process for the recovery of crystalline terephthalic acid from an aqueous solution at a temperature of 392‹ to 700‹ F. and a pressure to maintain water in the liquid phase, said solution being substantially saturated with terephthalic acid solute and having from 6000 to 500 p.p.m. p-toluic acid based on terephthalic acid comprises cooling the said solution by controlled-rate evaporative cooling (i.e. cooling by evaporation of water from the surface of the liquid phase at a rate which is controlled below the spontaneous uncontrolled vapour release rate or by maintaining a back-pressure) from the aforementioned temperature to a temperature in the range of 245‹ to 300‹ F. and a pressure to maintain solvent water in the liquid phase and recovering terephthalic acid crystalline product by solid-liquid separation at a temperature in the range of 245‹ to 300‹ F. and at a pressure to maintain water in the liquid phase.
GB2649069A 1969-05-23 1969-05-23 Terephthalic acid recovery Expired GB1261589A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB2649069A GB1261589A (en) 1969-05-23 1969-05-23 Terephthalic acid recovery
BG012320A BG15545A3 (en) 1969-05-23 1969-05-27 METHOD FOR OBTAINING TEREPTHALIC ACID

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2649069A GB1261589A (en) 1969-05-23 1969-05-23 Terephthalic acid recovery

Publications (1)

Publication Number Publication Date
GB1261589A true GB1261589A (en) 1972-01-26

Family

ID=10244461

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2649069A Expired GB1261589A (en) 1969-05-23 1969-05-23 Terephthalic acid recovery

Country Status (1)

Country Link
GB (1) GB1261589A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5166420A (en) * 1986-10-20 1992-11-24 Mitsui Petrochemical Industries, Ltd. Process for the production of high purity terephthalic acid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5166420A (en) * 1986-10-20 1992-11-24 Mitsui Petrochemical Industries, Ltd. Process for the production of high purity terephthalic acid

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