SU293763A1 - METHOD OF CLEANING CALCIUM SOLUTIONS - Google Patents
METHOD OF CLEANING CALCIUM SOLUTIONSInfo
- Publication number
- SU293763A1 SU293763A1 SU1391280A SU1391280A SU293763A1 SU 293763 A1 SU293763 A1 SU 293763A1 SU 1391280 A SU1391280 A SU 1391280A SU 1391280 A SU1391280 A SU 1391280A SU 293763 A1 SU293763 A1 SU 293763A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- lime
- solutions
- cleaning
- calcium solutions
- solution
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 title description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 title 1
- 229910052791 calcium Inorganic materials 0.000 title 1
- 239000011575 calcium Substances 0.000 title 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 7
- 235000015450 Tilia cordata Nutrition 0.000 description 7
- 235000011941 Tilia x europaea Nutrition 0.000 description 7
- 239000004571 lime Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- UXVMQQNJUSDDNG-UHFFFAOYSA-L cacl2 Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 4
- 239000001110 calcium chloride Substances 0.000 description 4
- 229910001628 calcium chloride Inorganic materials 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 229960003563 Calcium Carbonate Drugs 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L Calcium hydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 235000001465 calcium Nutrition 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
Изобретение относитс к технике очистки растворов хлористого кальци от при.месей железа и сульфатов.This invention relates to a technique for purifying calcium chloride solutions from iron and sulfate mixtures.
Известен способ очистки растворов хлористого «альаи Путем обработки их мелкодисперсным углекислым кальцием и известью. Однако этот способ не обеспечивает достаточной очистки растворов.A known method of cleaning solutions of chloride "alai" By treating them with finely dispersed calcium carbonate and lime. However, this method does not provide sufficient cleaning solutions.
Дл более полной очистки растворов хлористого .кальци предлагаетс исходные растворы обрабатывать известью до рН 7,3-7,5 при 70°С с одновременной продувкой сжатым воздухом , отфильтровывать, обрабатывать известью до рН не ниже 9,5 с одновременной продувкой топочными газами.For a more complete purification of chloride solutions. Calciums suggest that the initial solutions be treated with lime to a pH of 7.3-7.5 at 70 ° C with simultaneous purging with compressed air, filtered, treated with lime to a pH of not less than 9.5 with simultaneous purging with flue gases.
Ир и.мер. В раствор хлористого кальци в-вод т известковое молоко при 70°С, при непрерывном перемешивании довод т рН до 7,4 и пропускают через раствор сжатый воздух в течение 1 час. Затем раствор фильтруют через плотный фильтр, подщелачивают известью до рИ 9,7 и в течение 45 мин -пропускают черезIl and .mer. Into a solution of calcium chloride in a water of lime milk at 70 ° C, with continuous stirring, the pH is adjusted to 7.4 and compressed air is passed through the solution for 1 hour. Then the solution is filtered through a dense filter, alkalized with lime to pI 9.7 and for 45 minutes is passed through
раствор топочные газы, носло чего раствор оп ть отфильтровывают и перерабатывают в твердую соль. Иредлагаемый способ очистки растворовthe flue gases solution, the solution is again filtered and processed into solid salt. And the proposed method of cleaning solutions
хлористого кальци позвол ет уменьшить содержание железа почти в 10 раз и сульфата в 3-4 газа при начальном содержании эти.х примесей . Способ .прост в осуществлении и не требует дополнительного оборудовани .calcium chloride makes it possible to reduce the iron content by almost 10 times and sulphate by 3-4 gases with an initial content of these impurities. The method is easy to implement and does not require additional equipment.
Предмет изобретени Subject invention
Способ очистки растворов хлористого кальци от примесей железа и сульфатов путем обработки известью, отличающийс тем, что, с целью более полной очистки, обработку известью ведут до рИ 7,3-7,5 при 70°С с одновременной продувкой сжатым воздухом, иолученный раствор фильтруют и затем обрабатывают известью до рП не ниже 9,5 с одновременной продувкой топочными газами.The method of cleaning calcium chloride solutions from iron and sulphate impurities by treatment with lime, characterized in that, for the purpose of a more complete purification, the treatment with lime is carried out up to a pH of 7.3-7.5 at 70 ° C with simultaneous purging with compressed air and the resulting solution and then treated with lime to a RP of not less than 9.5 with simultaneous purging with flue gases.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU293763A1 true SU293763A1 (en) |
Family
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006080A (en) * | 1974-10-12 | 1977-02-01 | Tioxide Group Limited | Process for the treatment of acidic waste liquid containing dissolved salts |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4006080A (en) * | 1974-10-12 | 1977-02-01 | Tioxide Group Limited | Process for the treatment of acidic waste liquid containing dissolved salts |
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