SU219578A1 - METHOD OF SULFURIC ACID REGENERATION - Google Patents
METHOD OF SULFURIC ACID REGENERATIONInfo
- Publication number
- SU219578A1 SU219578A1 SU1104508A SU1104508A SU219578A1 SU 219578 A1 SU219578 A1 SU 219578A1 SU 1104508 A SU1104508 A SU 1104508A SU 1104508 A SU1104508 A SU 1104508A SU 219578 A1 SU219578 A1 SU 219578A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- sulfuric acid
- acid regeneration
- urea
- increase
- acid
- Prior art date
Links
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims description 6
- 230000008929 regeneration Effects 0.000 title claims 2
- 238000011069 regeneration method Methods 0.000 title claims 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000002699 waste material Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000000706 filtrate Substances 0.000 description 2
- 230000003301 hydrolyzing Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- NMCUIPGRVMDVDB-UHFFFAOYSA-L Iron(II) chloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Description
Известен способ регенерации серной кислоты из отходов производства двуокиси титана путем двухстадийного упаривани с последующим отделением выпавших солей. Однако он не обеспечивает достаточной степени чистоты регенерируемой кислоты.A known method for the recovery of sulfuric acid from waste products of titanium dioxide by two-stage evaporation, followed by separation of the precipitated salts. However, it does not provide a sufficient degree of purity of the regenerated acid.
С целью устранени указанного недостатка, а также увеличени скорости фильтрации предлагаетс в отработанную кислоту перед упаривание.м вводить мочевину в количестве 0,3-1о/о и вести упаривание в ее присутствии.In order to eliminate this drawback, as well as to increase the filtration rate, it is suggested that the urea in an amount of 0.3-1 ° / o be introduced into the spent acid before evaporation.
Этот способ позвол ет перерабатывать гидролизную кислоту с высоким содержанием алюмини и получать товарную продукцию с минимальным остаточным содержанием не более 3,5о/о, котора не требует доочистки.This method allows the processing of hydrolytic acid with a high aluminum content and obtain marketable products with a minimum residual content of not more than 3.5 o / o, which does not require additional purification.
Пример. В 18%-ную гидролизную кислоту ввод т мочевину в количестве 0,3-1о/о и упаривают при температуре 110-115°С до 37о/оной концентрации с последующим охлаждением до 40°С. Охлажденную суспензию подают на барабанный вакуум-фильтр дл отделени твердой фазы, а фильтрат направл ют на вторую стадию упаривани и далее - на фильтрацию .Example. Urea is introduced into 18% hydrolytic acid in an amount of 0.3-1 ° / o and evaporated at a temperature of 110-115 ° C to 37 ° / one concentration, followed by cooling to 40 ° C. The cooled suspension is fed to a drum vacuum filter to separate the solid phase, and the filtrate is sent to the second evaporation stage and then to the filtration.
Остаточное содержание солей в фильтрате не превышает 3,5о/оПредмет изобретени The residual content of salts in the filtrate does not exceed 3.5 ° C.
Claims (2)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU219578A1 true SU219578A1 (en) |
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