SU998588A1 - Process for producing phosphoric acid - Google Patents
Process for producing phosphoric acid Download PDFInfo
- Publication number
- SU998588A1 SU998588A1 SU813342950A SU3342950A SU998588A1 SU 998588 A1 SU998588 A1 SU 998588A1 SU 813342950 A SU813342950 A SU 813342950A SU 3342950 A SU3342950 A SU 3342950A SU 998588 A1 SU998588 A1 SU 998588A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- solution
- acid
- phosphoric acid
- electrolysis
- producing phosphoric
- Prior art date
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- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Description
(5) СПОСОБ ПОЛУЧЕНИЯ ФОСФОРИСТОЙ КИСЛОТЫ(5) METHOD FOR OBTAINING PHOSPHORIC ACID
Изобретение относитс к химической технологии, в частности к способам получени фосфористой кислоты путем электролиза. Известен способ получени фосфористой кислоты путем гидролиза .трихлорида фосфора l. Недостатками способа вл етс мно гостадийность процесса, использование дорогосто щего сырь , сложность технологических -процессов. Дл получейи трихлорида.фосфора используетс чистый элементарный фосфор и хло что требует особых мор предосторожно сти и ступенчатого оборудовани . Про цесс гидролиза трихлорида фосфора с целью получени чистой фосфористой кислоты также требует точного соблюдени технологических параметров. Известен способ получени фосфористой кислоты путем электролиза раствора минеральной кислоты с добавкой гипофосфита. Троцесс анодного ; окислени гипофосфитов до фосфитов провод т из раствора состава 1520 г/л гипофосфита в присутствии галоидоводородной кислоты (50-70 г/л) на графитовом аноде С2.Недостатком известного способа вл етс низкий выход по току, коттэрый составл ет 63%. Использование в качестве исходного соединени дорогосто щего гипофосфита, получение которого из элементарного фосфора св зано со значительными затруднени ми , в частности получение в качестве побочного продукта процесса токсичного и способного самовозгоратьс фосфина. Целью изобретени вл етс увеличение выхода по току и удешевление процесса. Поставленна цель достигаетс тем, что согласно способу получени фосфористой кислоты путем электролиза раствора минеральной кислоты, в качестве раствора минеральной кисло ты используют раствор серной кис- The invention relates to chemical technology, in particular to methods for producing phosphorous acid by electrolysis. A known method for producing phosphorous acid by hydrolysis of phosphorus trichloride is l. The disadvantages of this method are the multistage process, the use of expensive raw materials, the complexity of technological processes. For the preparation of trichloride phosphorus, pure elemental phosphorus and chlorine are used, which requires special precautions and step equipment. The process of hydrolysis of phosphorus trichloride in order to obtain pure phosphorous acid also requires strict adherence to technological parameters. A method of producing phosphorous acid is known by electrolysis of a solution of mineral acid with the addition of hypophosphite. Anode process; oxidation of hypophosphites to phosphites is carried out from a solution of a composition of 1520 g / l of hypophosphite in the presence of hydrohalic acid (50-70 g / l) on a graphite anode C2. The disadvantage of this method is the low current efficiency, which is 63%. The use of expensive hypophosphite as a starting compound, the production of which from elemental phosphorus is associated with considerable difficulties, in particular, the preparation of toxic and self-combustible phosphine as a byproduct. The aim of the invention is to increase the current efficiency and reduce the cost of the process. This goal is achieved by the fact that according to the method of obtaining phosphorous acid by electrolysis of a solution of mineral acid, sulfuric acid solution is used as a solution of mineral acid.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU813342950A SU998588A1 (en) | 1981-09-25 | 1981-09-25 | Process for producing phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU813342950A SU998588A1 (en) | 1981-09-25 | 1981-09-25 | Process for producing phosphoric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU998588A1 true SU998588A1 (en) | 1983-02-23 |
Family
ID=20978605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU813342950A SU998588A1 (en) | 1981-09-25 | 1981-09-25 | Process for producing phosphoric acid |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU998588A1 (en) |
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1981
- 1981-09-25 SU SU813342950A patent/SU998588A1/en active
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