US1603169A - Tanning material and process of producing same - Google Patents
Tanning material and process of producing same Download PDFInfo
- Publication number
- US1603169A US1603169A US544667A US54466722A US1603169A US 1603169 A US1603169 A US 1603169A US 544667 A US544667 A US 544667A US 54466722 A US54466722 A US 54466722A US 1603169 A US1603169 A US 1603169A
- Authority
- US
- United States
- Prior art keywords
- tanning
- producing same
- tanning material
- hide
- bichromate
- 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 - Lifetime
Links
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
- C14C3/04—Mineral tanning
Definitions
- a composition to be used in a tanning process comprising sodium bichromate, magnesium'sulfate, and aluminum sulfate.
- the step in the process of tanning hides which comprises treating a hide with 'an aqueous solution of a salt of chromic acid, magnesium sulfate and aluminum sulfate in substantially the. proportions of 2 to'-5 to 4 by weight.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Description
Patented Oct. 12, 1926.
UNITED STATES;
"PA ENT" ounce.
JOHN K. TULLIS, OF NEW. YORK NI mamrme MATERIAL ann'rnocnss or rnonuome sans.
No Drawing.
This invention relates to a tanning material or agent and a tanning process by which I am enabled to effect av satisfactory tanning ofhides by a single-bath process, This single-bath process, as herein described, may be followed, when desired, by a further final tanning operation in order to bring about certain results that may be desired in par.- ticular cases. i
.In practicing this invention I make use of various chrome compounds, together with certain sulfates or. a m xture of sulfates. I have found chromic and salts, such for example as the sodium bichromate or the bichromate of potassium, to be suitable,
although chromic acid itself may be used.
One or more of these chrome compounds are mixed with sulfates such as aluminum and magnesium for example, and I have found that this mixture gives a good tanning extract that may be used in a singlebath for tanning purposes, thus eliminating the necessity of first treating the hides in a bath to produce an initial or preliminary tanning and .then subsequently treating them in a different bath to' complete the tannin operation. In this way consider-- able la or is saved and the operation does not have to be watched as closely as is the case with a two-bath process.
The following is given as a specific example illustrating the invention. .It is not intended to restrict the invention to the particular details given in this example, as varlatlons of materials, proportions, etc.,
'can be made without departing from the spirit or scope of the invention.
I may prepare an aqueous solution containing about two parts .by weight of sodium bichromate, five parts of magnesium sulfate and four parts of aluminum sulfate. The
sodium bichromate may .be substituted.
'- wholly or in part by bichromate of potassium. The hide, after the usual beam-house preparation, is immersedin or wet with the liquid mixture of sulfates and .bichromate above referred to for a sufficiently long time for the tanning totake place. The time required will depend largely uponthe nature Application filed March 17, 1922. Serial No. 544,667.
and thickness of the hide to'be tanned, andthe concentration of the solution, and in general will vary from about three to six days. At the end of -this timethe hide'has further tanning bemg necessary.
.become well tanned so that the leather can be used for a variety of purposes without In case, however, it is desired to use the leather for sole leather or the like, I find it advisable-to subject the same to an additional tanning operation. For this final tanning'operation I may use well known tanning extracts, such as waste sulfite liquor;
or vegetable tanning materials, such as mangrove, oak,- hemlock, quebracho, or chestnut, etc.; or sulfite liquor mixed with these vegetable, tanning materials; or formalde-' 'hyde s'ulfonic acid or other synthetic tan- 7 ning' agents. The one-'bath tanning' operation of my invention does not interfere with the final tanning above mentioned when it is desired to use the latter for special purposes after the hide has been subjected-to the tanning operation with the the chrome com- 2. A composition to be used in a tanning process comprising sodium bichromate, magnesium'sulfate, and aluminum sulfate.
3. A composition to be used in a tanning process comprising sodium bichroma-te, mag-- nesium sulfate, and aluminum sulfate in the proportions of about 2 to 5- to 4 by weight.
4. The step inthe process of tanning hides which. comprises treating a hide with a mixture of a. chromic acid salt and magnesium and aluminum sulfates.
' 5. The step in the process of tanning hides which comprises treating a hide with 'an aqueous solution of a salt of chromic acid, magnesium sulfate and aluminum sulfate in substantially the. proportions of 2 to'-5 to 4 by weight.
In testimony whereof I aflix m si nature. I
OHN K."
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US544667A US1603169A (en) | 1922-03-17 | 1922-03-17 | Tanning material and process of producing same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US544667A US1603169A (en) | 1922-03-17 | 1922-03-17 | Tanning material and process of producing same |
Publications (1)
Publication Number | Publication Date |
---|---|
US1603169A true US1603169A (en) | 1926-10-12 |
Family
ID=24173090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US544667A Expired - Lifetime US1603169A (en) | 1922-03-17 | 1922-03-17 | Tanning material and process of producing same |
Country Status (1)
Country | Link |
---|---|
US (1) | US1603169A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0291165A1 (en) * | 1987-04-24 | 1988-11-17 | I.C.I. Francolor Snc | Tanning Agent |
-
1922
- 1922-03-17 US US544667A patent/US1603169A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0291165A1 (en) * | 1987-04-24 | 1988-11-17 | I.C.I. Francolor Snc | Tanning Agent |
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