PL7367B1 - A method of treating dilute acetic acid to re-use it. - Google Patents
A method of treating dilute acetic acid to re-use it. Download PDFInfo
- Publication number
- PL7367B1 PL7367B1 PL7367A PL736726A PL7367B1 PL 7367 B1 PL7367 B1 PL 7367B1 PL 7367 A PL7367 A PL 7367A PL 736726 A PL736726 A PL 736726A PL 7367 B1 PL7367 B1 PL 7367B1
- Authority
- PL
- Poland
- Prior art keywords
- acetic acid
- fiber
- dilute acetic
- acid
- treating
- Prior art date
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 title claims description 33
- 238000000034 method Methods 0.000 title claims description 4
- 239000000835 fiber Substances 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 5
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010908 decantation Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Description
Podczas stezania, otrzymywanego przy wytwarzaniu octanu blonnika, rozcienczone¬ go kwasu octowego zapomoca wyciagania go rozpuszczalnikiem, produkty blonniko¬ we, rozpuszczone w rozcienczonym kwasie octowym, w miare wyciagania tegoz z roz¬ tworu wodnego, osadzaja sie, tworzac za¬ wiesine, uniemozliwiajaca dekantacje, a wskutek tego i zastosowanie tego sposobu w przemysle.Obecnie wykryto, co stanowi przedmiot wynalazku niniejszego, ze w celu uniknie¬ cia osadzania sie, rozcienczony kwas octo¬ wy, otrzymywany przy wytwarzaniu octanu blonnika, nalezy uprzednio obrobic, naj¬ korzystniej na goraco, mocnemi kwasami.Czas trwania obróbki i temperatura, w ja¬ kiej nalezy ja prowadzic, moga sie zmieniac w szerokich granicach i zaleza od stopnia rozcienczenia obrabianego kwasu octowego, od ilosci zawartych w nich produktów blonnikowych, jak równiez od rodzaju tych ostatnich. W praktyce, do osiagniecia wy¬ ników zadawalajacych wystarczy, gdy kwas octowy obrobic na goraco w ciagu kilku godzin mniej niz 1 % mocnego kwasu.Dzialanie mocnego kwasu objasnia sie tern, ze zwiazki blonnikowe, rozpuszczone w rzeczonym kwasie octowym, lecz nieroz¬ puszczalne w wodzie, przechodza w zwiaz¬ ki prostsze rozpuszczalne w wodzie.Jako kwas mocny mozna stosowac wszelkiego rodzaju ciala organiczne lub mi* neralne o wlasnosciach kwasowych, które posiadaja zdolnosc rozkladania zwiazków blonnikowych,Po zakonczeniu obróbki, wprowadzony mocny kwas, o ile jego obecnosc mialaby przeszkodzic ekstrakcji, mozna zobojetnic.Ponizej podano dwa przyklady prze¬ prowadzenia sposobu powyzszego w prak¬ tyce.Przyklad L Do 27%-wego kwasu octo¬ wego, otrzymanego przy wytwarzaniu oc¬ tanu blonnika, dodaje sie kwasu siarkowe¬ go o 50° Be w ilosci 10 cm3 na litr kwasu octowego i ogrzewa w ciagu 6 godzin w temperaturze 65°C. Kwas obrobiony w ten sposób, po ewentualnem zobojetnieniu kwa¬ su siarkowego weglanem sodowym, daje sie z latwoscia wyciagac.Przyklad II. W tych samych warun¬ kach jak i w przykladzie I otrzymuje sie te same wyniki, ogrzewajac mase reakcyj¬ na w temperaturze 90°C w ciagu 2 godzin. PL PLDuring the concentration of the diluted acetic acid obtained in the production of fiber acetate by extracting it with a solvent, the fiber products, dissolved in the diluted acetic acid, are deposited to form a suspension that prevents decantation as it is extracted from the aqueous solution. and hence the use of this method in industry. It has now been discovered, as it is the object of the present invention, that the dilute acetic acid obtained in the production of fiber acetate must be pre-treated, preferably hot, to avoid settling The duration of the treatment and the temperature at which it must be carried out may vary widely and depend on the degree of dilution of the acetic acid treated, on the amount of fiber products contained therein, as well as on the type of the latter. In practice, it is sufficient to heat the acetic acid with less than 1% of the strong acid in a few hours to obtain satisfactory results. The effect of the strong acid is shown by the fact that the fiber compounds are dissolved in said acetic acid but insoluble in water, they transform into simpler compounds soluble in water.As a strong acid, all kinds of organic or mineral bodies with acidic properties, which have the ability to decompose fiber compounds, can be used. The extraction can be neutralized. The following are two examples of how the above process is carried out in practice. Example L To the 27% acetic acid obtained in the production of fiber acetate, sulfuric acid is added 50 ° B in 10 cm3 per liter acetic acid and heated for 6 hours at 65 ° C. The acid treated in this way, after the possible neutralization of the sulfuric acid with sodium carbonate, can be easily extracted. Example II. Under the same conditions as in Example 1, the same results are obtained by heating the reaction mass at 90 ° C. for 2 hours. PL PL
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL7367B1 true PL7367B1 (en) | 1927-05-31 |
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