DEP0038041DA - Process for the production of dry acetic acid - Google Patents
Process for the production of dry acetic acidInfo
- Publication number
- DEP0038041DA DEP0038041DA DEP0038041DA DE P0038041D A DEP0038041D A DE P0038041DA DE P0038041D A DEP0038041D A DE P0038041DA
- Authority
- DE
- Germany
- Prior art keywords
- acetic acid
- sub
- sodium acetate
- coona
- 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
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 title claims description 72
- 238000004519 manufacturing process Methods 0.000 title claims 2
- 238000000034 method Methods 0.000 title claims 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical class [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 13
- 238000001816 cooling Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims 1
- 239000003518 caustics Substances 0.000 claims 1
- 159000000011 group IA salts Chemical class 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 229940040526 anhydrous sodium acetate Drugs 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 5
- 239000001632 sodium acetate Substances 0.000 description 4
- 235000017281 sodium acetate Nutrition 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000011833 salt mixture Substances 0.000 description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- ORTFAQDWJHRMNX-UHFFFAOYSA-N hydroxidooxidocarbon(.) Chemical compound O[C]=O ORTFAQDWJHRMNX-UHFFFAOYSA-N 0.000 description 1
- 125000000896 monocarboxylic acid group Chemical group 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
Es gelingt, Essig in fester Form mit einem Gehalt bis zu 67% freier Essigsäure herzustellen, wenn man Essigsäure an wasserfreies Natriumacetat anlagert. Diese Anlagerungsprodukte sind kristalline, reinweisse Salze, bzw. Salzgemische, die sich zu einem trockenen Pulver vermahlen lassen.It is possible to produce vinegar in solid form with a content of up to 67% free acetic acid if acetic acid is added to anhydrous sodium acetate. These addition products are crystalline, pure white salts or salt mixtures that can be ground to a dry powder.
Wasserfreies Natriumacetat kann 1, 2 oder 3 Mol Essigsäure anlagern. Diese drei Salze werden in der Weise hergestellt, dass man in die Essigsäure die berechnete Menge Natriumacetat einträgt und schmilzt. Nach dem Erkalten werden feste, kristalline leicht pulverisierbare Salze erhalten, deren Gehalt an freier Essigsäure mit den theoretisch errechneten Werten übereinstimmt.Anhydrous sodium acetate can add 1, 2 or 3 moles of acetic acid. These three salts are prepared in such a way that the calculated amount of sodium acetate is added to the acetic acid and melted. After cooling, solid, crystalline, easily pulverizable salts are obtained, the free acetic acid content of which agrees with the theoretically calculated values.
Technisch zweckmässiger lassen sich die Salze in der Weise herstellen, dass man das Natriumacetat mit der Essigsäure verrührt und das warme, zähflüssige Produkt in einem abgedeckten Behälter erkalten lässt. Nach dem Erkalten lässt sich die feste Masse nach entsprechender Vorzerkleinerung in einer Schlagscheibenmühle zu einem feinen Pulver vermahlen.It is technically more expedient to prepare the salts in such a way that the sodium acetate is stirred with the acetic acid and the warm, viscous product is allowed to cool in a covered container. After cooling, the solid mass can be ground into a fine powder after appropriate pre-comminution in a beater disc mill.
An Stelle von wasserfreiem Natriumacetat können auch Alkalisalze, die mit Essigsäure Acetate bilden, wie Aetznatron, Soda, Natriumbicarbonat oder teilweise entwässertes Natriumacetat mit Essigsäure zur Reaktion gebracht werden. Das trockene Endprodukt enthält in diesem Falle neben saurem und wasserfreiem auch noch wasserhaltiges Natriumacetat.Instead of anhydrous sodium acetate, alkali salts which form acetates with acetic acid, such as caustic soda, soda, sodium bicarbonate or partially dehydrated sodium acetate, can also be reacted with acetic acid. In this case, the dry end product contains acid and water-free sodium acetate as well as water-containing sodium acetate.
Beispiel 1.Example 1.
180 g 99%ige Essigsäure werden mit 85 g wasserfreiem Natriumacetat geschmolzen. Bei 115° beginnt die Schmelze zu kristallisieren. Ausbeute: 262 g mit 66,5% freier CH(sub)3.COOH. Der theoretische Wert für CH(sub)3-COONa.3CH(sub)3-COOH ust 67,3% freie Essigsäure.180 g of 99% acetic acid are melted with 85 g of anhydrous sodium acetate. At 115 ° the melt begins to crystallize. Yield: 262 g with 66.5% free CH (sub) 3.COOH. The theoretical value for CH (sub) 3-COONa.3CH (sub) 3-COOH is 67.3% free acetic acid.
Beispiel 2.Example 2.
120 g 99%ige Essigsäure werden mit 85 g wasserfreiem Natriumacetat geschmolzen. Bei 138° beginnt die Schmelze zu kristallisieren. Ausbeute: 204 g mit 57,1% freier Essigsäure. Der theoretische Wert für CH(sub)3-COONa.2CH(sub)3-COOH ist 57,96% freie Essigsäure.120 g of 99% acetic acid are melted with 85 g of anhydrous sodium acetate. At 138 ° the melt begins to crystallize. Yield: 204 g with 57.1% free acetic acid. The theoretical value for CH (sub) 3-COONa.2CH (sub) 3-COOH is 57.96% free acetic acid.
Beispiel 3.Example 3.
120 g 99%ige Essigsäure werden mit 165 g wasserfreiem Natriumacetat geschmolzen. Bei 160° beginnt die Schmelze zu kristallisieren. Ausbeute: 383 g mit 39,8% freier Essigsäure. Der theoretische Wert für CH(sub)3-COONa.CH(sub)3-COOH ist 41,7% freie Essigsäure.120 g of 99% acetic acid are melted with 165 g of anhydrous sodium acetate. At 160 ° the melt begins to crystallize. Yield: 383 g with 39.8% free acetic acid. The theoretical value for CH (sub) 3-COONa.CH (sub) 3-COOH is 41.7% free acetic acid.
Beispiel 4.Example 4.
In 1000 ccm 98,5%iger Essigsäure werden 1000 g wasserfreies Natriumacetat eingerührt. Nach dem Erkalten wird eine harte, leicht pulverisierbare Masse erhalten, mit einem Essigsäuregehalt von 49,8%. Theoretischer Wert 50,5%.1000 g of anhydrous sodium acetate are stirred into 1000 cc of 98.5% acetic acid. After cooling, a hard, easily pulverizable mass is obtained with an acetic acid content of 49.8%. Theoretical value 50.5%.
Dieses Salzgemisch setzt sich zusammen aus:This salt mixture consists of:
CH(sub)3-COONa.3CH(sub)3-COOH 73,4%CH (sub) 3-COONa.3CH (sub) 3-COOH 73.4%
CH(sub)3-COONa.3H(sub)2O 2,0%CH (sub) 3-COONa.3H (sub) 2O 2.0%
CH(sub)3-COONa. 24,6%CH (sub) 3-COONa. 24.6%
Beispiel 5.Example 5.
In 830 g 95%iger Essigsäure werden 205 g festen Aetznatron gelöst. Nach dem Erstarren der geschmolzenen Masse wird ein festes, pulverisierbares Salzgemisch erhalten von der Zusammensetzung:205 g of solid caustic soda are dissolved in 830 g of 95% acetic acid. After the molten mass has solidified, a solid, powderable salt mixture is obtained from the composition:
CH(sub)3-COONa. 3CH(sub)3-COOH 67,3% = 46,3% freie CH(sub)3-COOHCH (sub) 3-COONa. 3CH (sub) 3-COOH 67.3% = 46.3% free CH (sub) 3-COOH
CH(sub)3-COONa. 3H(sub)2O 32,7%CH (sub) 3-COONa. 3H (sub) 2O 32.7%
Beispiel 6.Example 6.
200 g Natriumcarbonat werden in 600 g 95%ige Essigsäure eingerührt und geschmolzen. Nach dem Erkalten der geschmolzenen Masse wird ein festes Salz erhalten von der Zusammensetzung:200 g of sodium carbonate are stirred into 600 g of 95% acetic acid and melted. After cooling the molten mass, a solid salt is obtained, having the composition:
CH(sub)3-COONa. 3CH(sub)3 COOH 69,7% = 48% freie EssigsäureCH (sub) 3-COONa. 3CH (sub) 3 COOH 69.7% = 48% free acetic acid
CH(sub)3-COONa. 3H(sub)2O 22,5%CH (sub) 3-COONa. 3H (sub) 2O 22.5%
CH(sub)3-COONa. 7,8%CH (sub) 3-COONa. 7.8%
Claims (1)
Family
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