DE867048C - Process for the digestion of leather waste - Google Patents
Process for the digestion of leather wasteInfo
- Publication number
- DE867048C DE867048C DEE4789A DEE0004789A DE867048C DE 867048 C DE867048 C DE 867048C DE E4789 A DEE4789 A DE E4789A DE E0004789 A DEE0004789 A DE E0004789A DE 867048 C DE867048 C DE 867048C
- Authority
- DE
- Germany
- Prior art keywords
- leather waste
- digestion
- waste
- leather
- glue
- 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
- 239000010985 leather Substances 0.000 title claims description 15
- 239000002699 waste material Substances 0.000 title claims description 13
- 238000000034 method Methods 0.000 title claims description 6
- 230000029087 digestion Effects 0.000 title claims description 3
- 239000003292 glue Substances 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 6
- 239000007857 degradation product Substances 0.000 claims description 6
- 230000017854 proteolysis Effects 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000003513 alkali Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 102000008186 Collagen Human genes 0.000 description 2
- 108010035532 Collagen Proteins 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- VQWFNAGFNGABOH-UHFFFAOYSA-K chromium(iii) hydroxide Chemical compound [OH-].[OH-].[OH-].[Cr+3] VQWFNAGFNGABOH-UHFFFAOYSA-K 0.000 description 2
- 229920001436 collagen Polymers 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012460 protein solution Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 244000052616 bacterial pathogen Species 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000007859 condensation product Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09H—PREPARATION OF GLUE OR GELATINE
- C09H3/00—Isolation of glue or gelatine from raw materials, e.g. by extracting, by heating
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Description
Verfahren zum Aufschluß von Lederabfällen ES ist bekannt, daß sich Lederabfäl.lie, insbesondere Chromlederabfällie; durch alkalische Verkochung mit oder ohne Druck zu Eiweißkondensationsprodukten verschiedenster Molekulargrößen aufschließen lassen.Process for digesting leather waste ES is known that Leather waste, in particular chrome leather waste; by alkaline boiling with or without pressure to form protein condensation products of various molecular sizes unlock.
Dieselben Ausgangsmaterialien lassen sich durch besonders milde alkalische Verkochung auf Leime guter Oualität verarbeiten. Bei der milden Verkochung kommt aber die V erleimung des gegerbten Kollagens bei etwa 75M1 der Gesamtmenge zum Stillstand, weil. der Rest, und zwar gerade der höchststrukturierte Anteil des Kollagens, so fest an den Gerbstoff gebunden ist, daß mit de:r gelinden, Behandlung keime Spaltung erreicht wird. Es wurde nun gefunden, .daß sich Lederabfälle, insbesondere Chromlederabfälle, in vorteilhafter Weise, aufschließen lassen, wennr man, die Lederabfälle in an sich bekannter We:is,e unter milden alkalischen Bedingungen derart auf Leim verkocht, d:aß etwa 6o bis. 8o °/Q der Gesamtmenge verleimt werden und daß man den verbleibenden Rückstand dann durch schärfere alkalische Verkochung in niedrigermolekulare Eiweißabbauprodukte überführt, die gegebenenfalls durch Kondensation mit geeigneten anderen Komponenten in kapillaraktive Stoffe übergeführt werden.The same starting materials can be processed with particularly mild alkaline boiling on glues of good quality. In the case of mild boiling, however, the sizing of the tanned collagen comes to a standstill at around 75M1 of the total amount, because. the rest, specifically the highly structured part of the collagen, is so tightly bound to the tanning agent that the mild treatment achieves germ splitting. It has now been found that leather waste, in particular chrome leather waste, can be broken down in an advantageous manner if the leather waste is cooked on glue in a manner known per se under mild alkaline conditions in such a way as to eat about 60 to. 80 ° / Q of the total amount are glued and that the remaining residue is then converted into lower-molecular-weight protein degradation products by sharper alkaline boiling, which are optionally converted into capillary-active substances by condensation with other suitable components.
Man. erreicht durch .das `"erfahren gemäß der Erfindung in einer technisch einfachen MTeise eine besonders günstige Ausnutzung der Ausgangsstoffe: Die nach dem Verfahren der Erfindung erhaltenen Eiweißabbauprodukte sind in ihren Eigenschaften den nach den vorbekannten Verfahren erhältlichen Eiweißabbauprodukten in mancher Beziehung überlegen. Der Sulfatanteil dest zum Teil als basisches Sulfat gebundenen Gerbstoffes wird bei der Leimherstellung herausgelöst, und das Eiwenß'abbauprodukt enthält dementsprechend außer dem zum Aufschluß verwendeten Alkali 'keime anorganischen Salze, was' bei manchen Verwerndunigs@zwecken von Bedeutung ist. Außerdem erhält man: Produkte, deren Molekulargröß'e einheitlicher ist, als wenn direkt von den! Lederabfällen ausgegangen wird.Man. achieved by. the `` experience according to the invention in a technical simple MTeise a particularly favorable utilization of the raw materials: The protein degradation products obtained by the process of the invention are in their Properties of the protein degradation products obtainable by the previously known processes superior in some ways. The sulphate content at least partly as basic sulphate Bound tannin is released during glue production, and the protein degradation product accordingly contains, in addition to the alkali used for digestion, inorganic germs Salts, which is important for some Verwerndunigs @ purposes. Also receives man: products whose molecular size is more uniform than when directly from the! Leather waste is assumed.
Die erhaltenen Eiweißabbauprodukte können durch Kondensation mit Fettsäuren oder Sulfonsäuren auf kapiLlaraktive Substanzen verarbeitet werden. Sie eignen sich ferner zur Herstellung von Schaumlöschmitteln und Flotations@mitteln.The protein degradation products obtained can by condensation with fatty acids or sulfonic acids are processed into capillary active substances. You are suitable also for the production of foam extinguishers and flotation agents.
Alls Ausgangsmaterialien für das beschriebene Verfahren eignen sich in, erster Linie Abfälle von Chromleder, während alaungare oder sulfochloridgegerbte Leder sich zur vorherigen Leimgewinnung weniger eignen .und gegerbte Leder hierfür überhaupt nicht in Frage kommen.All starting materials for the process described are suitable in, primarily, waste of chrome leather, while alaungare or sulfochloride-tanned Leather is less suitable for prior glue extraction and tanned leather is for this out of the question at all.
B#e1'Splel I Iooo,IvgChromfalzspäne mit einemTrockengehaIt von 33 %- werden unter Zusatz von 3 0 kg Magnesit mit 6 cbm Wasser verkocht. Nach dem Abfiltrieren von dem verbleibenden. Rückstand, er'h'ält man 4600 1 5%ige Leimlösung. Der Rückstand wird mit 30 kg So°/oiger Natronlauge versetzt und unter Druck z Stunden auf IZo" erhitzt. Der dann noch verbleibende Rückstand besteht im wesentlichen aus Chromhydroxyd. Alls Filtrat erhält man 60o 1 einer klarem hellgelben Eiweißlösung mit 6o kg abgebauter Eiweißsubstanz: vom mittleren Molekulargewicht 500.B # e1'Splel I Iooo, IvgChromfalzspäne with einemTrockengehaIt of 33% - are cooked with the addition of 3 0 kg magnesite 6 cubic meters of water. After filtering off the remaining. Residue, you get 4600 1 5% glue solution. The residue is mixed with 30 kg of sodium hydroxide solution and heated under pressure to IZo "for 2 hours. The residue that then still remains consists essentially of chromium hydroxide average molecular weight 500.
B`eisipi,e12 Chrom@alzspäne werden durch- Verkochuna mit Magnesib bei pH 8 bis 9 verlieimt. Der verbleibende Rückstand wird mit Natronlauge versetzt und unter Druck 2 Stunden auf IZÖ°' erhitzt. Nach dem Abfiltern von dem noch verbleibenden Rückstand, der im wesentlichen aus Chromlhydroxyd besteht, erhält man eine klare hellgelbe Eiweißlösung vom mittleren Molekulargewicht 30o bis iooo, je nach der verwendeten, Alkalimenge und der Kochzeit.B`eisipi, e12 chromium shavings are through- Verkochuna with magnesib lent at pH 8 to 9. Sodium hydroxide solution is added to the residue that remains and heated under pressure to IZÖ ° 'for 2 hours. After filtering off the remaining A clear residue is obtained, which consists essentially of chromium hydroxide light yellow protein solution with an average molecular weight of 30o to 100o, depending on the used, amount of alkali and the cooking time.
B'eis'pi'el'3 Gemahlene Chromlederabfälle werden untrer Zusatz vorn Soda bei pH 8 bis 9 auf Leim verkocht. Dem erhaltenen Rückstand setzt man nun erneut Soda und' die äquivalente Menge Ätzkalk zu und kocht 3 bis 4. Stunden im offenen Kessel. Man erhält wach dem Filtern eine klare Eiweißlösung vom mittleren Molekulargewicht 70o bis aooo, je nach 'der verwendeten Alkalimenge und der angewandten Kochzeit.B'eis'pi'el'3 Ground chrome leather waste is added in front Soda boiled on glue at pH 8 to 9. The residue obtained is now set again Soda and 'the equivalent amount of quicklime and cook for 3 to 4 hours in the open Boiler. After filtering, a clear protein solution of average molecular weight is obtained 70o to aooo, depending on the amount of alkali used and the cooking time used.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEE4789A DE867048C (en) | 1951-12-18 | 1951-12-18 | Process for the digestion of leather waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEE4789A DE867048C (en) | 1951-12-18 | 1951-12-18 | Process for the digestion of leather waste |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE867048C true DE867048C (en) | 1953-02-16 |
Family
ID=7066424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEE4789A Expired DE867048C (en) | 1951-12-18 | 1951-12-18 | Process for the digestion of leather waste |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE867048C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1000388B (en) * | 1953-10-02 | 1957-01-10 | Chem Fab Gruenau Ag | Process for the production of protein breakdown products by hydrolytic cleavage of protein-containing raw materials |
| DE1090673B (en) * | 1957-12-11 | 1960-10-13 | Rutgers Res And Educational Fo | Process for the production of water-soluble protein degradation products from naturally occurring substances containing keratin |
| DE1235124B (en) * | 1960-07-12 | 1967-02-23 | Gen Foods Corp | Process for the production of edible gelatine from collagen material containing chromium |
-
1951
- 1951-12-18 DE DEE4789A patent/DE867048C/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1000388B (en) * | 1953-10-02 | 1957-01-10 | Chem Fab Gruenau Ag | Process for the production of protein breakdown products by hydrolytic cleavage of protein-containing raw materials |
| DE1090673B (en) * | 1957-12-11 | 1960-10-13 | Rutgers Res And Educational Fo | Process for the production of water-soluble protein degradation products from naturally occurring substances containing keratin |
| DE1235124B (en) * | 1960-07-12 | 1967-02-23 | Gen Foods Corp | Process for the production of edible gelatine from collagen material containing chromium |
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