DE246650C - Process for descaling hides - Google Patents
Process for descaling hidesInfo
- Publication number
- DE246650C DE246650C DE1910246650D DE246650DA DE246650C DE 246650 C DE246650 C DE 246650C DE 1910246650 D DE1910246650 D DE 1910246650D DE 246650D A DE246650D A DE 246650DA DE 246650 C DE246650 C DE 246650C
- Authority
- DE
- Germany
- Prior art keywords
- acid
- descaling
- hides
- decalcifying
- organic
- 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
- 238000000034 method Methods 0.000 title claims description 11
- 150000007524 organic acids Chemical class 0.000 claims description 7
- 150000007522 mineralic acids Chemical class 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- ZZUUMCMLIPRDPI-UHFFFAOYSA-N 2-hydroxypropanoic acid;sodium Chemical compound [Na].CC(O)C(O)=O ZZUUMCMLIPRDPI-UHFFFAOYSA-N 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 6
- 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
- 239000004310 lactic acid Substances 0.000 description 3
- 235000014655 lactic acid Nutrition 0.000 description 3
- 235000005985 organic acids Nutrition 0.000 description 3
- 239000010985 leather Substances 0.000 description 2
- CYDQOEWLBCCFJZ-UHFFFAOYSA-N 4-(4-fluorophenyl)oxane-4-carboxylic acid Chemical compound C=1C=C(F)C=CC=1C1(C(=O)O)CCOCC1 CYDQOEWLBCCFJZ-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001540 sodium lactate Substances 0.000 description 1
- 229940005581 sodium lactate Drugs 0.000 description 1
- 235000011088 sodium lactate Nutrition 0.000 description 1
- 201000009032 substance abuse Diseases 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
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
- Adornments (AREA)
- Treatment Of Fiber Materials (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
PATENTSCHRIFTPATENT LETTERING
- Jig 246650 KLASSE 28«. GRUPPE- Jig 246650 CLASS 28 «. GROUP
Verfahren zum Entkalken von Häuten. Patentiert im Deutschen Reiche vom 24. Juni 1910 ab.Procedure for descaling hides. Patented in the German Empire on June 24, 1910.
RhRh
Zum Entkalken verwendet man bekanntermaßen am besten organische Säuren, unter denen wiederum die Milchsäure als das günstigste Entkalk ungsmittel allgemein anerkannt ist. Der allgemeinen Anwendung der organischen Säuren zu diesem Zweck stehen indessen die immer gegenüber den anorganischen Säuren wesentlich höheren Herstellungskosten der Milchsäure entgegen. AndererseitsIt is well known that organic acids are best used for descaling, under which in turn, lactic acid is generally recognized as the cheapest decalcifying agent is. The general application of organic acids is available for this purpose however, the manufacturing costs are always much higher than those of the inorganic acids against lactic acid. on the other hand
ίο beeinflußt die Verwendung der wohlfeileren anorganischen Säuren, wie Schwefelsäure, Salzsäure u. dgl., die Qualität des fertigen Leders in sehr schädlicher Weise, worüber man sich in der Praxis einig ist.ίο affects the use of the cheaper ones inorganic acids such as sulfuric acid, hydrochloric acid and the like, the quality of the finished leather in a very harmful way, which in practice is agreed.
Die vorliegende Erfindung hat nun ein Verfahren zum Gegenstand, durch das es gelingt, die erwähnten Übelstände zu beseitigen und die Entkalkung mit Hilfe der anorganischen Säuren vorzunehmen, ohne daß deren Nachteile auftreten.The subject of the present invention is a method by means of which it is possible to eliminate the abuses mentioned and the decalcification with the help of the inorganic Make acids without their disadvantages occur.
Das Verfahren besteht darin, daß in der Entkalkungsflüssigkeit zunächst eine bestimmte Menge des Salzes einer geeigneten organischen Säure aufgelöst wird, worauf die Entkalkung mit einer geeigneten anorganischen Säure in bekannter Weise erfolgt.The method consists in that in the decalcifying liquid first a certain Amount of the salt of a suitable organic acid is dissolved, followed by decalcification takes place with a suitable inorganic acid in a known manner.
Dieser Salzzusatz ist so zu bemessen, daß er etwa V4 bis V2 der sonst zum Entkalken notwendigen äquivalenten organischen Säuremenge beträgt. Alsdann wird langsam die zum Entkalken notwendige Menge an Salz- oder Schwefelsäure zugesetzt. Die zugesetzte Säure findet in der Flüssigkeit stets eine gewisse Menge organischen Salzes vor und macht aus diesem die organische Säure als schwächere Säure frei, so daß stets nur diese schwache Säure auf die Blößen zur Wirkung kommt.The amount of salt added should be such that it amounts to approximately V 4 to V 2 of the equivalent amount of organic acid otherwise required for decalcifying. The amount of hydrochloric or sulfuric acid required for descaling is then slowly added. The added acid always finds a certain amount of organic salt in the liquid and releases from it the organic acid as a weaker acid, so that only this weak acid always has an effect on the pelts.
Der Vorteil dieses Verfahrens gegenüber den bisher bekannten Verfahren mit organischen Säuren allein liegt in einer wesentlichen Ersparnis, während andererseits gegenüber den mit starken anorganischen Säuren arbeitenden Verfahren das sichere Arbeiten und die bessere Qualität des erhaltenen Leders für die Anwendung dieses neuen Verfahrens sprechen.The advantage of this process over the previously known processes with organic Acids alone is a substantial saving, while on the other hand over the Processes that work with strong inorganic acids ensure safe and better work The quality of the leather obtained speaks in favor of using this new process.
Versuche haben ergeben, daß sich hierbei die Verwendung des milchsauren Natriums besonders empfiehlt.Experiments have shown that here the use of lactic acid sodium particularly recommends.
Um die Ausführung des Verfahrens an einem Beispiele zu erläutern, diene folgendes:To illustrate the execution of the method with an example, serve the following:
Auf 100 kg Blöße war 1 kg Milchsäure von
43,5 Gewichtsprozenten zum Entkalken notwendig. Statt dessen wurden gemäß dem neuen
Verfahren 0,25 kg milchsaures Natrium (50 Prozent) und 0,56 kg
verwendet.For every 100 kg of pelt, 1 kg of lactic acid of 43.5 percent by weight was necessary for decalcifying. Instead, according to the new procedure, 0.25 kg of sodium lactate (50 percent) and 0.56 kg
used.
Salzsäure von 20 ° Be.Hydrochloric acid at 20 ° Be.
3535
4040
4545
5555
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE246650T | 1910-06-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE246650C true DE246650C (en) | 1912-05-04 |
Family
ID=89473786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1910246650D Expired DE246650C (en) | 1910-06-24 | 1910-06-24 | Process for descaling hides |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE246650C (en) |
| FR (1) | FR425391A (en) |
-
1910
- 1910-06-24 DE DE1910246650D patent/DE246650C/en not_active Expired
-
1911
- 1911-01-30 FR FR425391A patent/FR425391A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR425391A (en) | 1911-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE616812C (en) | ||
| DE246650C (en) | Process for descaling hides | |
| DE975008C (en) | Process for the production of phosphate coatings on zinc and its alloys | |
| DE692925C (en) | Wetting agents, dispersants, foaming agents and cleaning agents | |
| DE445504C (en) | Method of removing weeds | |
| DE551805C (en) | Process to accelerate the vulcanization of natural and synthetic rubbers | |
| DE663688C (en) | Improvement of the adhesion of pesticides to be dusted or suspended in spray boilers | |
| DE273708C (en) | ||
| DE576388C (en) | Process for the preparation of camphene | |
| DE591511C (en) | Process for the electrodeposition of chromium | |
| DE960721C (en) | Process for the preparation of 2, 5-substituted 2, 5-dihydrofuran derivatives | |
| DE250086C (en) | ||
| DE437002C (en) | Process for the preparation of aminooxy compounds of the aromatic series | |
| DE601642C (en) | Process for the preparation of disulfides | |
| DE573522C (en) | Process to prevent scale formation | |
| DE625324C (en) | Process for the purification of synthetic methanol | |
| DE593968C (en) | Process for the preparation of aminoalkylsulphonic acids | |
| DE514505C (en) | Process for the preparation of 1-methyl-5-chlorobenzene-2-carboxamide-3-thioglycolic acid | |
| DE419814C (en) | Process for the preparation of highly chlorinated nitrogen-containing hydroaromatic products | |
| DE332097C (en) | Process for roasting bast fiber plants | |
| DE346530C (en) | ||
| DE543788C (en) | Process for the production of finishing products from wool fat | |
| DE562824C (en) | Process for the preparation of o-nitrophenyl sulfones and their reduction products | |
| DE721684C (en) | Decalcifying agent | |
| DE706129C (en) | Process for the production of brewery pitch from brewery pitch |