AT80491B - Process for drying lignosulfonic acid salts produced from sulphite waste liquor. made lignosulfonic acid salts. - Google Patents
Process for drying lignosulfonic acid salts produced from sulphite waste liquor. made lignosulfonic acid salts.Info
- Publication number
- AT80491B AT80491B AT80491DA AT80491B AT 80491 B AT80491 B AT 80491B AT 80491D A AT80491D A AT 80491DA AT 80491 B AT80491 B AT 80491B
- Authority
- AT
- Austria
- Prior art keywords
- acid salts
- lignosulfonic acid
- waste liquor
- drying
- sulphite waste
- Prior art date
Links
- 239000002699 waste material Substances 0.000 title claims description 7
- 238000001035 drying Methods 0.000 title claims description 6
- 238000000034 method Methods 0.000 title claims description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 title claims description 6
- FOGYNLXERPKEGN-UHFFFAOYSA-N 3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfopropyl)phenoxy]propane-1-sulfonic acid Chemical class COC1=CC=CC(CC(CS(O)(=O)=O)OC=2C(=CC(CCCS(O)(=O)=O)=CC=2)OC)=C1O FOGYNLXERPKEGN-UHFFFAOYSA-N 0.000 title description 8
- 239000002253 acid Substances 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- 239000003599 detergent Substances 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 229920006395 saturated elastomer Polymers 0.000 claims description 2
- 239000012266 salt solution Substances 0.000 claims 1
- 150000003460 sulfonic acids Chemical class 0.000 claims 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 235000002639 sodium chloride Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- -1 B. Soda Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-N sulfonic acid Chemical class OS(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Detergent Compositions (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zum Trocknen von aus Sulfitablauge hergestellten ligninsulfonsauren Salzen.
Wie vom Erfinder festgestellt worden ist, enthält Sulfitahlauge sulfonsaure Salze, welche in gesättigter Kochsalzlösung unlöslich sind und welche als ligninsulfonsaure Sa'ze bezeichnet werden. Diese werden aus der Sulfitablauge dadurch erhalten. dass diese mit Kochsalz bis zur
EMI1.1
und nachfolgendem Waschen mit gesättigter Kochsalzlösung getrennt wird. enthält nach vollständiger Entwässerung etwa 50% Wasser.
Um daraus ein getrocknetes Produkt herzustellen, kann man indessen nicht ohne weiteres gewöhnliches Trocknen in der Wärme, selbst wenn man Vakuum anwendet, verwenden, weil schon bei einer Temperatur \'on 50 bis 60 die ligninsulfonsauren Salze Veränderungen erleiden, wobei die ursprünglich hellgraue Farte desselben ein verharztes Aussehen annimmt.
Die vorliegende Erfindung bezieht sich nun auf ein Verfahren. diesen Nachteil zu beseitigen, so dass eine vollständige Trocknung des wasserhaltigen Produktes auch bei höherer Temperatur
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Die Veränderungen, welche die ligninsulfonsauren Salze, wie früher erwähnt, beim Trocknen erleiden, sind, wie der Erfinder gefunden hat. davon abhängig, dass die aus der Sulfitablauge ausgefällten, ligninsulfonsauren Salze freie Säure enthalten. Diese freien Säuren können
EMI1.3
werden, sondern werden dieselben nach vorliegendem Verfahren dadurch abgeschieden, dass die aus der Sulfitablauge ausgefällten. ligninsulfonsauren Salze mit gesättigter, ein freies Alkali, z. B. Soda, Natriumhydrat, enthaltender Kochsalzlösung gewaschen werden.
Nach der darauf folgenden Entwässerung der Masse sind die ligninsulfonsauren Salze in einer derartigen Form vorhanden, dass sie ohne Veränderung bei hoher Temperatur getrocknet und im getrockneten Zustande erhalten werden können. Das Verfahren kann auch mit anderen, geeigneten Waschmitteln, z. B. freies Alkali enthaltenden Alkohol, ausgeführt werden.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Process for drying lignosulfonic acid salts produced from sulphite waste liquor.
As has been determined by the inventor, sulphite liquor contains sulphonic acid salts which are insoluble in saturated sodium chloride solution and which are referred to as lignosulphonic acid salts. These are obtained from the sulphite waste liquor. that this with table salt up to
EMI1.1
and subsequent washing with saturated saline. contains about 50% water after complete dehydration.
In order to produce a dried product from it, however, one cannot simply use ordinary drying in the heat, even if one uses a vacuum, because the lignosulfonic acid salts already undergo changes at a temperature of 50 to 60, the originally light gray color of the same takes on a resinous appearance.
The present invention now relates to a method. to eliminate this disadvantage, so that a complete drying of the water-containing product even at a higher temperature
EMI1.2
The changes which the lignosulfonic acid salts undergo upon drying, as mentioned earlier, are what the inventor has found. dependent on the lignosulfonic acid salts precipitated from the sulfite waste liquor containing free acid. These free acids can
EMI1.3
are, but they are deposited according to the present process in that the precipitated from the sulphite waste liquor. lignosulfonic acid salts with saturated, a free alkali, e.g. B. Soda, sodium hydrate, containing saline solution.
After the subsequent dehydration of the mass, the lignosulfonic acid salts are present in such a form that they can be dried at high temperature without change and can be obtained in the dried state. The method can also be carried out with other suitable detergents, e.g. B. free alkali-containing alcohol are carried out.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE80491X | 1916-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT80491B true AT80491B (en) | 1920-04-10 |
Family
ID=20273010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT80491D AT80491B (en) | 1916-01-15 | 1916-12-28 | Process for drying lignosulfonic acid salts produced from sulphite waste liquor. made lignosulfonic acid salts. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT80491B (en) |
-
1916
- 1916-12-28 AT AT80491D patent/AT80491B/en active
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