FIELD: chemical technology. SUBSTANCE: method of technical 75% phosphorous acid production involves the hydrolysis of vat waste from rectification of dimethylphosphite containing dimethylphosphite, monomethylphosphite and phosphorous acid. Hydrolysis process is carried out using 2-3-fold water excess with continuous methanol formed and moderate temperature increase from 86-90 C at beginning of hydrolysis process to 105-110 C at the end. Method is used for production of phosphorus-containing complexones, phosphorous acid salts, reductants, polymeric stabilizing agents, bioactive compounds, etc. EFFECT: improved method of phosphorous acid production.
| Title | Year | Author | Number |
|---|---|---|---|
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|
SU1754719A1 |
| PROCESS FOR PRODUCING INHIBITOR OF MINERAL SALT DEPOSITIONS | 0 |
|
SU992519A1 |
| CORROSION INHIBITOR IN MINERALIZED HYDROGEN SULFIDE-CONTAINING OIL- FIELD MEDIA | 2004 |
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| METHOD OF SYNTHESIS OF REAGENT-COLLECTING AGENT BASED ON HYDROXYALKYLIDENE DIPHOSPHONIC ACIDS FOR NONSULFIDE ORE FLOTATION | 1993 |
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| METHOD OF HYDROXYETHYLIDENE PHOSPHONIC ACID SYNTHESIS | 1994 |
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| METHOD OF PREPARING HYDROXYETHYLIDENE DIPHOSPHONIC ACID FROM PHOSPHORUS- CONTAINING WASTE OF HIGHER FATTY ACID CHLORIDE PRODUCTION | 2000 |
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| METHOD FOR PRODUCTION OF OXYETHYLIDENEDIPHOSPHONIC ACID FROM HIGHER FATTY ACID HALIDE PRODUCTION WASTE | 2000 |
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| METHOD OF PREPARING CORROSION INHIBITOR POSSESSING BACTERICIDAL ACTIVITY FOR CONTROLLING GROW OF SULFATE-REDUCING BACTERIA | 2003 |
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| PROCESS FOR PRODUCING INHIBITOR OF MINERAL SALT DEPOSITS | 0 |
|
SU973543A1 |
