GB786897A - Purification of terephthalic acid - Google Patents

Purification of terephthalic acid

Info

Publication number
GB786897A
GB786897A GB5680/55A GB568055A GB786897A GB 786897 A GB786897 A GB 786897A GB 5680/55 A GB5680/55 A GB 5680/55A GB 568055 A GB568055 A GB 568055A GB 786897 A GB786897 A GB 786897A
Authority
GB
United Kingdom
Prior art keywords
terephthalic acid
solution
activated carbon
aqueous ammonia
acid
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
GB5680/55A
Inventor
William Alexander O'neill
Edmund Cecil Owen
Stanley Minor Todd
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB5680/55A priority Critical patent/GB786897A/en
Publication of GB786897A publication Critical patent/GB786897A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
    • C07C63/14—Monocyclic dicarboxylic acids
    • C07C63/15—Monocyclic dicarboxylic acids all carboxyl groups bound to carbon atoms of the six-membered aromatic ring
    • C07C63/26—1,4 - Benzenedicarboxylic acid
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
    • C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
    • C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
    • C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
    • 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
    • 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
    • C07C51/47—Separation; Purification; Stabilisation; Use of additives by solid-liquid treatment; by chemisorption
    • 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
    • C07C51/487—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to chemical modification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
    • C07C63/14—Monocyclic dicarboxylic acids
    • C07C63/15—Monocyclic dicarboxylic acids all carboxyl groups bound to carbon atoms of the six-membered aromatic ring
    • C07C63/24—1,3 - Benzenedicarboxylic acid
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C63/00—Compounds having carboxyl groups bound to a carbon atoms of six-membered aromatic rings
    • C07C63/33—Polycyclic acids
    • C07C63/337—Polycyclic acids with carboxyl groups bound to condensed ring systems
    • C07C63/34—Polycyclic acids with carboxyl groups bound to condensed ring systems containing two condensed rings
    • C07C63/38—Polycyclic acids with carboxyl groups bound to condensed ring systems containing two condensed rings containing two carboxyl groups both bound to carbon atoms of the condensed ring system

Landscapes

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

Abstract

Terephthalic acid is purified by successively treating an aqueous solution of a salt of terephthalic acid with activated carbon, a reducing agent having no reducing action on the terephthalic acid, and, if desired, with further activated carbon. The treatment is conducted by dissolving terephthalic acid in aqueous ammonia, treating the solution with activated carbon and then with sodium hyposulphite, crystallizing the ammonium terephthalate, dissolving the latter in water and treating again with activated carbon. Terephthalic acid is isolated by acidifying the ammonium salt solution. The ammonium terephthalate motherliquors are used for further purifications after adding more aqueous ammonia. The purification of terephthalic acid by (a) solution in aqueous ammonia and precipitation with acid, and (b) solution in aqueous ammonia, treatment with active carbon, crystallization of the ammonium salt, solution of the latter in water and precipitation with acid, is described for purposes of comparison. Specification 695,170 is referred to.
GB5680/55A 1955-02-25 1955-02-25 Purification of terephthalic acid Expired GB786897A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5680/55A GB786897A (en) 1955-02-25 1955-02-25 Purification of terephthalic acid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5680/55A GB786897A (en) 1955-02-25 1955-02-25 Purification of terephthalic acid

Publications (1)

Publication Number Publication Date
GB786897A true GB786897A (en) 1957-11-27

Family

ID=9800639

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5680/55A Expired GB786897A (en) 1955-02-25 1955-02-25 Purification of terephthalic acid

Country Status (1)

Country Link
GB (1) GB786897A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078303A (en) * 1959-03-27 1963-02-19 California Research Corp Purification of aromatic carboxylic acids
US3080420A (en) * 1963-03-05 Purification of phthalic acids
US3219691A (en) * 1962-03-23 1965-11-23 Sun Oil Co Preparation of naphthalene-2,6-dicarboxylic acid
US3243456A (en) * 1962-06-06 1966-03-29 Eastman Kodak Co Purification of insoluble dicarboxylic acids
US3265729A (en) * 1963-03-29 1966-08-09 Standard Oil Co Process of purifying phthalic acids

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080420A (en) * 1963-03-05 Purification of phthalic acids
US3078303A (en) * 1959-03-27 1963-02-19 California Research Corp Purification of aromatic carboxylic acids
US3219691A (en) * 1962-03-23 1965-11-23 Sun Oil Co Preparation of naphthalene-2,6-dicarboxylic acid
US3243456A (en) * 1962-06-06 1966-03-29 Eastman Kodak Co Purification of insoluble dicarboxylic acids
US3265729A (en) * 1963-03-29 1966-08-09 Standard Oil Co Process of purifying phthalic acids

Similar Documents

Publication Publication Date Title
GB786897A (en) Purification of terephthalic acid
ES420775A1 (en) Process for purification of aqueous sodium citrate solutions
GB992749A (en) Ferrous glutamate
GB1041408A (en) Improvements in or relating to the production of sodium bicarbonate
GB722586A (en) Process for fractionating starch
GB785045A (en) Purification of terephthalic acid
ES388664A1 (en) Process for the recovery of ammonium sulphate from it aqueous solutions contaminated by organic substances
GB827548A (en) Chloro-oleandomycin and acid salts thereof
ES416766A1 (en) A procedure for the preparation of (3-trifluormethylphenoxy) - (4-chlorophenyl) acetate of 2-acetamidoetilo. (Machine-translation by Google Translate, not legally binding)
ES260954A1 (en) Procedure for crystallizing sodium seschicarbonate and sodium bicarbonate (Machine-translation by Google Translate, not legally binding)
BE614903A (en) Advanced method of concentrating and crystallizing aqueous solutions by freezing
SU139660A1 (en) The method of obtaining pure iron oxide
ES218110A1 (en) Improved bis(beta-hydroxyethyl) terephthalate
GB910730A (en) Method of purifying terephthalic acid
JPS5210900A (en) Related process for production of pure calcium carbonate and calcium h ydrogen phosphate
ES270922A1 (en) Improvements in or relating to purifying crystalline insulin
GB699384A (en) Improvements in or relating to purification of vitamin preparations
GB990120A (en) Process for the purification of dehydrocholic acid
JPS5249995A (en) Method for purificating raw aqueous solution of zinc chloride system
GB823043A (en) Purification of tungsten by recrystallization of normal alkali metal tungstate as the paratungstate
FR1317533A (en) Advanced method of concentrating and crystallizing aqueous solutions by freezing
GB586133A (en) Improvements in or relating to the recovery of crotonic acid
ES279129A1 (en) A procedure for the preparation of salts of addition of hydroxocobalamine (Machine-translation by Google Translate, not legally binding)
GB977692A (en) Preparation of degraded carrageenin
GB970943A (en) Manufacture of ammonium chloride