GB234138A - Process for the preparation of hypophosphites with the simultaneous production of phosphites and phosphoric acid - Google Patents

Process for the preparation of hypophosphites with the simultaneous production of phosphites and phosphoric acid

Info

Publication number
GB234138A
GB234138A GB12966/25A GB1296625A GB234138A GB 234138 A GB234138 A GB 234138A GB 12966/25 A GB12966/25 A GB 12966/25A GB 1296625 A GB1296625 A GB 1296625A GB 234138 A GB234138 A GB 234138A
Authority
GB
United Kingdom
Prior art keywords
autoclave
lime
phosphoric acid
phosphorus
phosphites
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
GB12966/25A
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.)
Merck KGaA
Original Assignee
E Merck AG
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 E Merck AG filed Critical E Merck AG
Publication of GB234138A publication Critical patent/GB234138A/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
    • C01B25/16—Oxyacids of phosphorus; Salts thereof
    • C01B25/18—Phosphoric acid
    • C01B25/185—Preparation neither from elemental phosphorus or phosphoric anhydride nor by reacting phosphate-containing material with an acid, e.g. by reacting phosphate-containing material with an ion-exchange resin or an acid salt used alone
    • 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
    • C01B25/16—Oxyacids of phosphorus; Salts thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Luminescent Compositions (AREA)

Abstract

Phosphoric acid is obtained in addition to hypophosphites and phosphites by treating an aqueous suspension of an alkaline-earth hydrate with phosphorus and burning the phosphoretted hydrogen which is evolved. In an example, sticks of phosphorus are placed in milk of lime in an autoclave and the air replaced by nitrogen. The temperature is raised in order to start the reaction and when the pressure has risen to six atmospheres the phosphoretted hydrogen is allowed to pass out of the autoclave, through lime towers to ovens in which it is burned to phosphoric acid.ALSO:Alkaline earth phosphites are obtained in addition to hypophosphates by treating an aqueous suspension of the alkaline-earth hydrate with phosphorus at an elevated temperature. In an example, sticks of phosphorus are placed in milk of lime in an autoclave and the air replaced by nitrogen. The temperature is raised in order to start the reaction and when the pressure has risen to six atmospheres the phosphoretted hydrogen is allowed to pass out of the autoclave, through lime towers to ovens in which it is burned to phosphoric acid. After expelling the phosphoretted hydrogen remaining in the liquor in the autoclave by means of a stream of nitrogen it is filtered. The precipitate which consists of lime and calcium phosphite is washed, dissolved in hydrochloric acid and re-precipitated by means of caustic soda free from carbonate. The filtrate is neutralized by passing carbon dioxide, filtered after heating, and finally evaporated in vacuo in order to obtain hypophosphite.
GB12966/25A 1924-05-17 1925-05-18 Process for the preparation of hypophosphites with the simultaneous production of phosphites and phosphoric acid Expired GB234138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE234138X 1924-05-17

Publications (1)

Publication Number Publication Date
GB234138A true GB234138A (en) 1925-12-31

Family

ID=5889886

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12966/25A Expired GB234138A (en) 1924-05-17 1925-05-18 Process for the preparation of hypophosphites with the simultaneous production of phosphites and phosphoric acid

Country Status (1)

Country Link
GB (1) GB234138A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4386059A (en) * 1982-05-07 1983-05-31 Nl Industries, Inc. Zinc hydroxy phosphite complex

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4386059A (en) * 1982-05-07 1983-05-31 Nl Industries, Inc. Zinc hydroxy phosphite complex

Similar Documents

Publication Publication Date Title
GB234138A (en) Process for the preparation of hypophosphites with the simultaneous production of phosphites and phosphoric acid
US2036760A (en) Manufacture of calcium phosphates
US1723800A (en) Utilization of sulphite cellulose waste liquor
US1543763A (en) Decolorizing carbon and process of producing the same
US2505304A (en) Lignin compounds and method for making same
GB183485A (en) A process for treating sugar juices
US1920851A (en) Process for producing formates of alkaline earth metals
GB146333A (en) Process for the simultaneous production of caustic soda and hydrochloric acid
US1303177A (en) Process of producing ligno tanning material from waste sulfite liquors
US852372A (en) Method of producing dicalcium phosphate.
GB285386A (en) Process for eliminating the acidity of acid activated charcoal
US2067013A (en) Process for producing the disodium salt of imidodicarboxylic acid
GB181255A (en) Improvements in the production of phosphoric acid
US1351693A (en) Process of producing alkali-metal hydroxids
GB245430A (en) Process for the production of phosphoric acid anhydride
GB238428A (en) Improvements in or relating to the decomposing of crude borate of lime (boronatrocalcite) and the production therefrom of concentrated boric acids
DE392203C (en) Process for the production of a fertilizer from waste liquors from the pulp mill
GB241903A (en) Process for the production of phosphoric acid
GB499566A (en) Improvements in and relating to the manufacture of alkali phosphates
SU46921A1 (en) The method of obtaining malic acid from the tobacco
GB184206A (en) Improved process of manufacturing soluble phosphates
GB645430A (en) Improvements in or relating to a process of making vanillin
GB382327A (en) Process for the manufacture of pyridine derivatives
GB235015A (en) Improved manufacture of hexamethylenetetramine
GB272232A (en) Process for the manufacture of 1.3-dioxy-4-carboxy-6-phenylethyl-benzene