GB678120A - An improved process for the manufacture of phosphorus oxychloride - Google Patents

An improved process for the manufacture of phosphorus oxychloride

Info

Publication number
GB678120A
GB678120A GB25077/50A GB2507750A GB678120A GB 678120 A GB678120 A GB 678120A GB 25077/50 A GB25077/50 A GB 25077/50A GB 2507750 A GB2507750 A GB 2507750A GB 678120 A GB678120 A GB 678120A
Authority
GB
United Kingdom
Prior art keywords
carbon
chlorinating
phosphorus oxychloride
phosphoric acid
charcoal
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
GB25077/50A
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.)
Compagnie de Saint Gobain SA
Original Assignee
Compagnie de Saint Gobain SA
Manufactures des Glaces et Produits Chimiques de Saint Gobain SA
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 Compagnie de Saint Gobain SA, Manufactures des Glaces et Produits Chimiques de Saint Gobain SA filed Critical Compagnie de Saint Gobain SA
Publication of GB678120A publication Critical patent/GB678120A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B25/00—Phosphorus; Compounds thereof
    • C01B25/10—Halides or oxyhalides of phosphorus

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Catalysts (AREA)

Abstract

Phosphorus oxychloride is manufactured by subjecting phosphoric anhydride or its hydration products, e.g. ortho,- meta,- or pyro-phosphoric acid to a chlorinating reaction in the presence of carbon and, if desired, another reducing agent. The reaction tempertaure is 500 DEG -700 DEG C if carbon is used alone or 300 DEG -500 DEG C if carbon monoxide is used as additional reducing agent. Carbon tetrachloride or carbon oxychloride may be used as combined chlorinating and reducing agents. Wood charcoal, size 150-400m , is impregnated with dilute ortho-phosphoric acid, and the product, dried at 200 DEG C and dehydrated at 500 DEG C in an inert gas until the impregnant is substantially meta-phosphoric acid. The charcoal is fed continuously into a column at 600 DEG C and is p maintained in constant agitation by a counter-current of chlorinating and, if desired, reducing gas. Spent charcoal is continuously withdrawn and reimpregnated, while phosphorus oxychloride is separated from the resulting gases by condensation and rectified, and hydrochloric acid is recovered.
GB25077/50A 1949-10-13 1950-10-13 An improved process for the manufacture of phosphorus oxychloride Expired GB678120A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR859000X 1949-10-13

Publications (1)

Publication Number Publication Date
GB678120A true GB678120A (en) 1952-08-27

Family

ID=9330203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25077/50A Expired GB678120A (en) 1949-10-13 1950-10-13 An improved process for the manufacture of phosphorus oxychloride

Country Status (5)

Country Link
BE (1) BE498647A (en)
DE (1) DE859000C (en)
FR (1) FR1096205A (en)
GB (1) GB678120A (en)
NL (1) NL70632C (en)

Also Published As

Publication number Publication date
FR1096205A (en) 1955-06-16
DE859000C (en) 1952-12-11
NL70632C (en)
BE498647A (en)

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