DE392386C - Process for the production of a solid, non-hygroscopic product from sulphite cellulose waste liquor - Google Patents
Process for the production of a solid, non-hygroscopic product from sulphite cellulose waste liquorInfo
- Publication number
- DE392386C DE392386C DEA33430D DEA0033430D DE392386C DE 392386 C DE392386 C DE 392386C DE A33430 D DEA33430 D DE A33430D DE A0033430 D DEA0033430 D DE A0033430D DE 392386 C DE392386 C DE 392386C
- Authority
- DE
- Germany
- Prior art keywords
- chamber
- waste liquor
- solid
- gases
- production
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000002699 waste material Substances 0.000 title claims description 13
- 239000007787 solid Substances 0.000 title claims description 9
- 229920002678 cellulose Polymers 0.000 title claims description 6
- 239000001913 cellulose Substances 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
- 238000000034 method Methods 0.000 title claims description 5
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 239000007789 gas Substances 0.000 claims description 16
- 239000000047 product Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000007795 chemical reaction product Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 229910052791 calcium Inorganic materials 0.000 claims description 2
- 239000011575 calcium Substances 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 238000009835 boiling Methods 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 claims 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 239000004295 calcium sulphite Substances 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Natural products CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
- C14C3/24—Chemical tanning by organic agents using lignin derivatives, e.g. sulfate liquor
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
Verfahren zur Herstellung eines festen, nicht hygroskopischen Produktes - aus Sulfitcelluloseablauge. Es ist bekannt, Sulfitcelluloseablauge durch Zerstäuben in heißen Kammern nicht gebundener schwefliger Säure und Calciumsulfit zu befreien und sie gleichzeitig zu konzentrieren oder die Zerstäubung bei solchen Temperaturen zu bewirken, daß eine pulverförmige oder feinkörnige Masse zurückbleibt.Process for the production of a solid, non-hygroscopic product - from sulphite cellulose waste liquor. It is known that sulphite cellulose waste liquor is produced by atomization to free unbound sulphurous acid and calcium sulphite in hot chambers and they simultaneously concentrate or atomize at such temperatures to cause a powdery or fine-grained mass to remain.
Nach dem vorliegenden Verfahren wird die in bekannter Weise durch Behandeln mit Neutralsalzen bzw. Schwefel- oder Oxalsäure vom Calcium und Magnesium befreite Sulfitcelluloseablauge zunächst unter niedrigem Druck in einer Kammer unter gleichzeitigem Durchleiten heißer Gase durch die Kammer zerstäubt und die dadurch konzentrierte Lauge unter hohem Druck in einer zweiten Kammer, durch die ebenfalls heiße Gase geführt werden, nochmals zerstäubt, wobei die Gase aus der ersten Kammer in mit der Ablauge gesättigtem Zustand austreten, während die Gase aus (ler zweiten Kammer frei von den festen Bestandteilen der Ablauge austreten. Ehe die kernzentrierte Lauge in die zweite Kammer eingeführt wird, kann sie durch Behandlung in rler Vakuumpfanne weiter konzentriert werden. Das aus der zweiten Kammer schnell entfernte, nicht hygroskopische Endprodukt ist pulverförmig und enthält keine ungebundene schweflige Säure mehr.According to the present method, the in a known manner Treat with neutral salts or sulfuric or oxalic acid from calcium and magnesium liberated sulphite cellulose waste liquor first under low pressure in a chamber simultaneous passage of hot gases through the chamber atomized and the thereby concentrated caustic under high pressure in a second chamber through which also hot gases are passed, atomized again, with the gases from the first chamber exit in a state saturated with the waste liquor, while the gases come out (ler second Exit chamber free of the solid components of the waste liquor. Marriage to the core centered Lye is introduced into the second chamber, it can be removed by treatment in the vacuum pan be further concentrated. The one quickly removed from the second chamber, not hygroscopic end product is powdery and does not contain any unbound sulphurous Acid more.
Das Produkt findet in der Gerberei, zur Herstellung von Klebmitteln, Brennstoffen, sowie für andere technische Zwecke Verwendung. Infolge seiner geringen Hygroskopizität kann das trockene Pulver in die teilweise angegerbte Hautblößen enthaltende Gerbtrommel eingeführt und unmittelbar in das Leder hinein verarbeitet werden. Das ist bei Verwendung eines hygroskopischen Produktes nicht möglich, weil ein solches bei Berührung mit feuchter Luft in eine zusammenhängende harte Masse verwandelt wird.The product is used in the tannery, for the production of adhesives, Fuels, as well as for other technical purposes. As a result of its low The dry powder can hygroscopicity in the partially tanned skin pelts containing tanning drum introduced and processed directly into the leather will. This is not possible when using a hygroscopic product because when it comes into contact with moist air, it turns into a coherent, hard mass is transformed.
Bei der Ausübung des Verfahrens wird als Ausgangsstoff eine Sulfitcelluloseablauge benutzt, die 9 bis. io Prozent feste Bestandteile enthält. Die Verdampfung der Lauge erfolgt in zwei Stufen. Zu diesem Zweck wird die Lauge zunächst unter niedrigem Druck in einer Kammer zerstäubt, durch die heiße Gase geleitet werden, die eine Temperatur von etwa i57° C besitzen, während die Lauge eine Temperatur von etwa 1q.° C hat. Als Gase können z. B. die _,Abgase einer Dampfkesselfeuerung verwendet werden. Die aus der Kammer ausströmenden Gase verlassen die Kammer in mit der Ablauge ,gesättigtem Zustand bei einer Temperatur, die wenig höher liegt als diejenige der rohen Lauge. Durch diese erste Verdampfung wird die Ablauge so weit konzentriert, daß sie etwa 35 bis So Prozent feste Bestandteile enthält. Diese konzentrierte Lauge wird dann unter .hohem Druck in einer zweiten Kammer zerstäubt, durch welche ebenfalls etwa i57° C heiße Gase geleitet werden. Hierbei wird die vorher konzentrierte Lauge in ein trockenes pulverförmiges Produkt umgewandelt. Die Menge der heißen Gase im Verhältnis zur Lauge ist nämlich so bemessen, daß nach erfolgter Verdampfung die Gase mit einer Temperatur von noch etwa 3q.° C aus der Kammer abziehen. Nahezu ioo Prozent der in der ursprünglichen Lauge enthaltenen festen Bestandteile können auf diese Weise als trockenes Endprodukt gewonnen werden, das nur noch einen Feuchtigkeitsgehalt von 2 bis 3 Prozent aufweist.When carrying out the process, a sulphite cellulose waste liquor is used as the starting material used that 9 to. contains 10 percent solid components. The evaporation of the lye takes place in two stages. For this purpose, the lye is first under low Pressure atomized in a chamber through which hot gases are passed, the one Have a temperature of about i57 ° C, while the liquor has a temperature of about 1q. ° C. As gases, for. B. the _, exhaust gases from a steam boiler used will. The gases flowing out of the chamber leave the chamber with the waste liquor , saturated state at a temperature slightly higher than that of the raw lye. Through this first evaporation, the waste liquor is concentrated to such an extent that that it contains about 35 to 50 percent solids. This concentrated lye is then atomized under .high pressure in a second chamber, through which also gases with a temperature of about i57 ° C are passed. The previously concentrated lye is used here converted into a dry powdery product. The amount of hot gases in the The ratio to the lye is so dimensioned that after evaporation has taken place Withdraw gases with a temperature of about 3q. ° C from the chamber. Almost ioo Percent of the solid constituents contained in the original lye can increase This way it can be obtained as a dry end product that only has a moisture content from 2 to 3 percent.
Das gewonnene Produkt ist pulverförmig; die einzelnen Teilchen erscheinen unter dem Mikroskop als kugelförmige Gebilde mit glasiger harter Oberfläche. Es ist in Wasser vollständig löslich und nur teilweise löslich in einigen der organischen Lösungsmittel, wie z. B. Aceton oder Methylalkohol. In trocknem Zustand ist das Produkt schwer löslich in Basen, dagegen leicht in starken Säuren.The product obtained is in powder form; the individual particles appear under the microscope as a spherical structure with a glassy hard surface. It is completely soluble in water and only partially soluble in some of the organic Solvents such as B. acetone or methyl alcohol. It is in a dry state Product sparingly soluble in bases, but easily in strong acids.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US392386XA | 1918-11-16 | 1918-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE392386C true DE392386C (en) | 1924-03-20 |
Family
ID=21904409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEA33430D Expired DE392386C (en) | 1918-11-16 | 1920-05-15 | Process for the production of a solid, non-hygroscopic product from sulphite cellulose waste liquor |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE392386C (en) |
-
1920
- 1920-05-15 DE DEA33430D patent/DE392386C/en not_active Expired
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