SU349678A1 - METHOD OF WASTEWATER TREATMENT - Google Patents
METHOD OF WASTEWATER TREATMENTInfo
- Publication number
- SU349678A1 SU349678A1 SU1151534A SU1151534A SU349678A1 SU 349678 A1 SU349678 A1 SU 349678A1 SU 1151534 A SU1151534 A SU 1151534A SU 1151534 A SU1151534 A SU 1151534A SU 349678 A1 SU349678 A1 SU 349678A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- alcohols
- wastewater treatment
- molecular weight
- low molecular
- acids
- Prior art date
Links
- 238000004065 wastewater treatment Methods 0.000 title description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 6
- 150000001298 alcohols Chemical class 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 150000007513 acids Chemical class 0.000 description 4
- 238000005886 esterification reaction Methods 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 230000002378 acidificating Effects 0.000 description 2
- -1 aliphatic alcohols Chemical class 0.000 description 2
- 235000014113 dietary fatty acids Nutrition 0.000 description 2
- 239000000194 fatty acid Substances 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- TZIHFWKZFHZASV-UHFFFAOYSA-N Methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Inorganic materials [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
Description
Известен способ очистки сточных вод, например , в производстве синтетических жирных кислот (СЖК), от низкомолекул рных карбоновых кислот путем этерификации их спиртами. Процесс этерификации осуществл етс в паровой фазе при ПО-140°С в присутствии серной кислоты. Затем полученные эфиры подвергаютс переэтерификации с низкомолекул рпыми спиртами.A known wastewater treatment method, for example, in the production of synthetic fatty acids (FFA), from low molecular weight carboxylic acids by esterification with alcohols. The esterification process is carried out in the vapor phase at PO-140 ° C in the presence of sulfuric acid. The resulting esters are then transesterified with low molecular weight alcohols.
Цель изобретени - упрощение процесса. Дл этого по предлагаемому способу в качестве спиртов используют водорастворимые низкомолекул рные алифатические спирты, преимущественно метиловый спирт.The purpose of the invention is to simplify the process. For this, according to the proposed method, water-soluble low molecular weight aliphatic alcohols, preferably methyl alcohol, are used as alcohols.
Могут использоватьс также этиловый, пропиловый, бутиловый спирты.Ethyl, propyl, butyl alcohols can also be used.
Процесс этерификации начинаетс при температуре в кубе 70°С и заканчиваетс при 105°С. При этом из сточных вод отгон ютс эфиры, а в остатке остаетс вода и растворенные в ней высококип щие продукты. Процесс может осуществл тьс как в присутствии катализатора, так и без него при нормальном или повыщенном давлении.The esterification process begins at a cubed temperature of 70 ° C and ends at 105 ° C. At the same time, esters are distilled off from the wastewater, and the remainder is water and high-boiling products dissolved in it. The process can be carried out in the presence or absence of a catalyst under normal or increased pressure.
Полученную смесь эфиров можно легко разделить на фракции, соответствующие эфирам индивидуальных кислот, из которых известными способами можно выделить индивидуальные кислоты.The resulting mixture of esters can be easily divided into fractions corresponding to the esters of individual acids, from which individual acids can be isolated by known methods.
сточных вод производства синтетических жирных кислот апробирован в лабораторных услови х.wastewater production of synthetic fatty acids tested in laboratory conditions.
При м ер. В 500-миллилитровую колбу сAt meer. 500 ml flask with
насадочной ректификационной колонкой загрузили 307,5 г кислой воды с -кислотным числом 145 мг КОН, 69 мл метилового спирта и 6 г 98%-ной серной кислоты. Смесь нагрели до кипени и при этом непрерыв 10 отбирали фракции низкокип щих продуктов:a packed distillation column was charged with 307.5 g of acidic water, with an acid number of 145 mg KOH, 69 ml of methyl alcohol and 6 g of 98% sulfuric acid. The mixture was heated to boiling, and at the same time 10 fractions of low-boiling products were collected:
31,4-32°С -21 мл31.4-32 ° С -21 ml
метилформиат чистыйpure methyl formate
52,4-58,4°С--25,5 мл 52.4-58.4 ° C - 25.5 ml
остальные разде61 ,6-64,7°С -30,5 мл л ютс через 68-85°С -5 мл солн кислотthe remaining sections 61, 6–64.7 ° C –30.5 ml flow through 68–85 ° C –5 ml solar acids
Затем температура резко повысилась Then the temperature rose sharply
до 98°С.up to 98 ° C.
В кубе осталось 271,1 г кислой воды с кислотным числом 36,6 мг КОП, что за вычетом серной кислоты соответствует 6,77% от исходного количества низкомолекул рных кислот.In the cube, 271.1 g of acidic water with an acid number of 36.6 mg of CPC remained, which is 6.77% less sulfuric acid and corresponds to 6.77% of the initial amount of low molecular weight acids.
2525
Предмет изобретени 34The subject invention 34
лот, от низкомолекул рных карбоновых кис-створимые низкомолекул рные алифатичелот путем этерификации их спиртами, отли-ские спирты.lot, from low molecular weight carboxylic acid low molecular weight aliphatic cells by esterification with alcohols, individual alcohols.
чающийс тем, что, с целью упрощени про-2. Способ по п. 1, отличающийс тем, чтоin order to simplify pro-2. A method according to claim 1, characterized in that
цесса, в качестве спиртов используют водора-используют метиловый спирт.Process, as water use alcohols, use methyl alcohol.
349678 349678
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU349678A1 true SU349678A1 (en) |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083931A (en) * | 1976-08-23 | 1978-04-11 | Industrial Sales And Factoring Corporation | Process for treating aldol-condensation polyol waste liquor |
| US4131642A (en) * | 1976-09-17 | 1978-12-26 | Ciba-Geigy Corporation | Treatment of the waste from the production of tertiary butyl amine to recover sodium sulfate and methyl or sodium formate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083931A (en) * | 1976-08-23 | 1978-04-11 | Industrial Sales And Factoring Corporation | Process for treating aldol-condensation polyol waste liquor |
| US4131642A (en) * | 1976-09-17 | 1978-12-26 | Ciba-Geigy Corporation | Treatment of the waste from the production of tertiary butyl amine to recover sodium sulfate and methyl or sodium formate |
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