FR2254547A2 - Acid chloride prodn. by gas-phase phosgenation of acids - using mineral-derived active carbon as catalyst - Google Patents

Acid chloride prodn. by gas-phase phosgenation of acids - using mineral-derived active carbon as catalyst

Info

Publication number
FR2254547A2
FR2254547A2 FR7344591A FR7344591A FR2254547A2 FR 2254547 A2 FR2254547 A2 FR 2254547A2 FR 7344591 A FR7344591 A FR 7344591A FR 7344591 A FR7344591 A FR 7344591A FR 2254547 A2 FR2254547 A2 FR 2254547A2
Authority
FR
France
Prior art keywords
active carbon
mineral
catalyst
gas
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.)
Granted
Application number
FR7344591A
Other languages
French (fr)
Other versions
FR2254547B2 (en
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.)
Societe Nationale des Poudres et Explosifs
Original Assignee
Societe Nationale des Poudres et Explosifs
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 Societe Nationale des Poudres et Explosifs filed Critical Societe Nationale des Poudres et Explosifs
Priority to FR7344591A priority Critical patent/FR2254547A2/en
Publication of FR2254547A2 publication Critical patent/FR2254547A2/en
Application granted granted Critical
Publication of FR2254547B2 publication Critical patent/FR2254547B2/fr
Granted 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
    • C07C51/58—Preparation of carboxylic acid halides
    • C07C51/60—Preparation of carboxylic acid halides by conversion of carboxylic acids or their anhydrides or esters, lactones, salts into halides with the same carboxylic acid part

Landscapes

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

Abstract

The prodn. of acid chlorides by gas-phase phosgenation of acid vapour in the presence of active carbon according to the Parent patent is improved in that active carbon of mineral origin with a particle dia. of ca. 2 mm is used. Mineral-derived active carbon is just as effective as a catalyst as vegetable derived active carbon and is much less expensive; it also has a longer useful life, but is less selective. The COCl2/acid molar ratio is pref. ca.3. As soon as the reactants are in the vapour phase, the reaction is pref. effected at a temp. slightly below the theoretical b.p. of the acid. The active carbon should have a specific surface of ca. 1100m2/g and an iodine no. of ca. 1100 mg/g; suitable carbons are marketed by "Chemviron".
FR7344591A 1973-12-13 1973-12-13 Acid chloride prodn. by gas-phase phosgenation of acids - using mineral-derived active carbon as catalyst Granted FR2254547A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7344591A FR2254547A2 (en) 1973-12-13 1973-12-13 Acid chloride prodn. by gas-phase phosgenation of acids - using mineral-derived active carbon as catalyst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7344591A FR2254547A2 (en) 1973-12-13 1973-12-13 Acid chloride prodn. by gas-phase phosgenation of acids - using mineral-derived active carbon as catalyst

Publications (2)

Publication Number Publication Date
FR2254547A2 true FR2254547A2 (en) 1975-07-11
FR2254547B2 FR2254547B2 (en) 1976-11-19

Family

ID=9129179

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7344591A Granted FR2254547A2 (en) 1973-12-13 1973-12-13 Acid chloride prodn. by gas-phase phosgenation of acids - using mineral-derived active carbon as catalyst

Country Status (1)

Country Link
FR (1) FR2254547A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028327A1 (en) * 1979-10-26 1981-05-13 Bayer Ag Process for the preparation of carboxylic acid halides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028327A1 (en) * 1979-10-26 1981-05-13 Bayer Ag Process for the preparation of carboxylic acid halides

Also Published As

Publication number Publication date
FR2254547B2 (en) 1976-11-19

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