BE366337A - - Google Patents
Info
- Publication number
- BE366337A BE366337A BE366337DA BE366337A BE 366337 A BE366337 A BE 366337A BE 366337D A BE366337D A BE 366337DA BE 366337 A BE366337 A BE 366337A
- Authority
- BE
- Belgium
- Prior art keywords
- acid
- formic acid
- sodium hydroxide
- detergents
- purification
- Prior art date
Links
- BDAGIHXWWSANSR-UHFFFAOYSA-N formic acid Chemical compound OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 32
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 32
- 239000002253 acid Substances 0.000 claims description 13
- 235000019253 formic acid Nutrition 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 229920002678 cellulose Polymers 0.000 claims description 5
- 235000010980 cellulose Nutrition 0.000 claims description 5
- 239000003599 detergent Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 238000004821 distillation Methods 0.000 claims 1
- 235000013311 vegetables Nutrition 0.000 claims 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 10
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Natural products OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L na2so4 Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 210000001513 Elbow Anatomy 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M Sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001264 neutralization Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0007—Recovery of by-products, i.e. compounds other than those necessary for pulping, for multiple uses or not otherwise provided for
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
<Desc/Clms Page number 1>
"Procédé d'extraction de l'acide formique des lessives
EMI1.1
rês1duaires de purifioation des celluloses".
@ La purification des celluloses végétales au moyen de solutions de soude caustique en suivant par exemple la technique décrite dans le brevet français
N 663.012 déposé le 15 Février 1928, par la Société des PAPETERIES NAVARRE pour " PROCEDE ET APPAREIL POUR
LA PURIFICATION DE LA CELLULOSE DE BOIS", fournit une lessive résiduaire,
Cette lessive sensiblement neutre à la phénolphtaléfne, contient un poids de matières organi- ques sensiblement égal au poids de soude totale.
Les poids moléculaires des mntières organi- ques dissoutes et qui ont neutralise la soude caustique sont donc tels qu'Un poids déterminé de ces matières
<Desc/Clms Page number 2>
neutralisent sensiblement même poids de s oude. Parmi les corps susceptibles de satisfaire à cette condition, on rencontre : 1''- t'acide formique HCO OH
46 g. de cet acide neutralisent 40 g. de soude caustique.
2 - L'acide oxalique (CO OH)2
45 g. de cet acide neutralisent 40 g. de soude caustique.
3 - L'acide acétique CH3 CO2 qui ne s'éloigne pas beaucoup des conditions indiquées plue haut puisque 60 g. de cet acide neutralisent
40 g. de coude caustique. t'analyse montre que c'est l'acide formique -,qui est le plus abondant (60 à 80%).
La présente invention a pour but un procédé permettant d'extraire l'acide formique des lessives résiduaires susvisées. Ce procédé consiste essentiel- lement à traiter la lessive @@@@ par un acide plus fort que .acide formique et à distiller. Evidemment au lieu de traiter la lessive par un acide on peut employer un sel acide, le bisulfate de soude par exemple.
EXEMPLE - En traitant 150 g. d'une lessive concentrée contenant 21,77 % de soude totale, par 40 g. d'acide sulfurique à 66 Bé, on a recueilli 14 g.49 d'acide formique.
Lorsque pour mettre en liberté l'acide for- mique-on utilise l'acide sulfurique, il faut éviter un excès de ce dernier, car il décomposerait l'acide for- mique suivant la formule :
H C 0 OH @ CO + H20
On a intérêt à opérer avec une lessive très concentrée afin d'obtenir un acide formique le meine étendu possible, car cet acide a un point d'ébullition très voisin de celui de l'eau.
<Desc/Clms Page number 3>
Après le traitement de la lessive par un acide fort, la soude passe à l'état de sel de soude de l'acide utilisé. Ce sel de soude se trouve mélangé à un résidu charhoneux.
Dans l'exemple mentionné on a un mélange de sulfate de soude et de charbon. On peut retirer le sul- fate de deux manières différentes :
1 - Lixiviation méthodique du mélange et calcination subséquente du résidu;
2 - Calcination du mélange et lixiviation méthodique des cendres.
<Desc / Clms Page number 1>
"Process for extracting formic acid from washing liquids
EMI1.1
cellulose purifioation records ".
@ The purification of plant celluloses by means of caustic soda solutions, for example by following the technique described in the French patent
N 663.012 filed February 15, 1928, by the Société des PAPETERIES NAVARRE for "PROCEDE AND APPARATUS FOR
THE PURIFICATION OF WOOD CELLULOSE ", provides a residual detergent,
This detergent which is substantially neutral to phenolphthafin contains a weight of organic matter substantially equal to the weight of total sodium hydroxide.
The molecular weights of the dissolved organic materials which have neutralized the caustic soda are therefore such that A determined weight of these materials
<Desc / Clms Page number 2>
neutralize substantially the same weight of s oude. Among the bodies likely to satisfy this condition, we find: 1 '' - formic acid HCO OH
46 g. of this acid neutralize 40 g. of caustic soda.
2 - Oxalic acid (CO OH) 2
45 g. of this acid neutralize 40 g. of caustic soda.
3 - The acetic acid CH3 CO2 which does not deviate much from the conditions indicated above since 60 g. of this acid neutralize
40 g. caustic elbow. the analysis shows that it is formic acid - which is the most abundant (60 to 80%).
The object of the present invention is a process making it possible to extract formic acid from the aforementioned residual liquors. This process essentially consists of treating the lye with an acid stronger than formic acid and distilling. Obviously, instead of treating the lye with an acid, an acid salt can be used, for example sodium bisulphate.
EXAMPLE - By treating 150 g. of a concentrated lye containing 21.77% total soda, per 40 g. 66 Be sulfuric acid, 14 g. 49 formic acid were collected.
When sulfuric acid is used in order to release formic acid, an excess of the latter must be avoided, because it would decompose the formic acid according to the formula:
H C 0 OH @ CO + H20
It is advantageous to operate with a very concentrated lye in order to obtain a formic acid as extensive as possible, because this acid has a boiling point very close to that of water.
<Desc / Clms Page number 3>
After the lye has been treated with a strong acid, the soda becomes the soda salt of the acid used. This soda salt is found mixed with a charcoal residue.
In the example mentioned there is a mixture of sodium sulphate and carbon. The sulphate can be removed in two different ways:
1 - Methodical leaching of the mixture and subsequent calcination of the residue;
2 - Calcination of the mixture and methodical leaching of the ashes.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
BE366337A true BE366337A (en) |
Family
ID=38490
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE366337D BE366337A (en) |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE366337A (en) |
-
0
- BE BE366337D patent/BE366337A/fr unknown
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