US2910A - Improvement in making chromic yellow - Google Patents
Improvement in making chromic yellow Download PDFInfo
- Publication number
- US2910A US2910A US2910DA US2910A US 2910 A US2910 A US 2910A US 2910D A US2910D A US 2910DA US 2910 A US2910 A US 2910A
- Authority
- US
- United States
- Prior art keywords
- lead
- improvement
- chromate
- yellow
- chromic yellow
- 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
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 24
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate dianion Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 14
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-M acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 10
- NHNBFGGVMKEFGY-UHFFFAOYSA-N nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 10
- KRVSOGSZCMJSLX-UHFFFAOYSA-L Chromic acid Chemical compound O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 238000004040 coloring Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N Carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- OYFJQPXVCSSHAI-QFPUQLAESA-N enalapril maleate Chemical compound OC(=O)\C=C/C(O)=O.C([C@@H](C(=O)OCC)N[C@@H](C)C(=O)N1[C@@H](CCC1)C(O)=O)CC1=CC=CC=C1 OYFJQPXVCSSHAI-QFPUQLAESA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/14—Chromates; Bichromates
Definitions
- the ordinary process of manufacturing chromic yellow is by mixing a solution of chromate of potassa with a solution of the acetate or nitrate of lead, the chromate of lead being thereby precipitated and the acetate or nitrate of potassa left in solution.
- this ordinary process it is to be observed that the whole of the oxide of lead is converted into chromate and that the expense of previously converting that oxide into acetate or nitrate must beincurred.
- TILGHMAN In presence of- Y W. M. TILGHMAN, B. 0. TILGHMAN.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Description
UNITED STATES PATENT OFFICE.
RICHARD TILGHMAN, OF PHILADELPHIA, PENNSYLVANIA.
IMPROVEMENT IN MAKING CHROMIC YELLOW.
Specification forming part of Letters Patent No. 2,910, dated January 16, 1843.
To all whom it mag concern:
Be it known that I, the undersigned, RIGH- ARD A. TILGBLMAN, of the city of Philadelphia, in the county of Philadelphia, in the State of Pennsylvania, have invented a new and useful Improvement in the Manufacture of Ohrcmic Yellow, called an Improved Method of Manufacturing Chromic Yellow, of which the following is a full and exact description.
The ordinary process of manufacturing chromic yellow is by mixing a solution of chromate of potassa with a solution of the acetate or nitrate of lead, the chromate of lead being thereby precipitated and the acetate or nitrate of potassa left in solution. In this ordinary process it is to be observed that the whole of the oxide of lead is converted into chromate and that the expense of previously converting that oxide into acetate or nitrate must beincurred.
Now, my improvement consists in using the carbonate of lead in place of the solution of the acetate or nitrate of lead commonly employed in the manufacture of chromic yellow. By this substitution the expense of convertin g the oxide of lead into the acetate or nitrate of lead is avoided, and a given quantity of chromic acid is suflicient to produce a much larger quantity of pigment of good quality than can be obtained by any process for its manufacture heretofore known.
My method of manufacturing chromic yellow ac'cordin gto theimprovement I have above stated is by mixing or grinding the carbonate of lead in a solution of chromate or bichromate of potassa or in any other soluble chromate or bichromate, the solution in everycase being in excess.
The chemical action resulting from this treatment of the above-named ingredients is as follows: When the carbonate of lead is ground with any soluble chromate or bichromate a double decomposition takes place, the chromic acid uniting with the oxide of lead and forming chromate of lead or chromic yellow, while the carbonic acid unites with the alkali of the soluble chromate or bichromate employed. But this action appears not to take place throughout the entire substance of the particles of the carbonate of lead, but seems to extend to a certain depth beneath their stir-1 face only, so that a given portion of the soluble chromate or bichromate employed is sufficient to color from eight to twelve or more times its chemical equivalent of the carbonate of lead, the extent of this coloring action of a given quantity of the chromate or bichromate being greater or less, according as the particles of the carbonate of lead are coarser or finer, the coarser the particles of the carbonate the greater being the coloring effect of a given quantity of the chromate or bichromate, and vice versa. When the action consequent upon mixing or grinding together these ingredients in the manner above stated has ceased the liquid is poured off, and the chromic yellow is washed in as expeditious manner as possible, as a long-continued soaking in water will produce a reddish color from a partial decomposition of the chromate of lead. After the last washings have been expelled as completely as cember, A. D. 1842.
w R. A. TILGHMAN. In presence of- Y W. M. TILGHMAN, B. 0. TILGHMAN.
Publications (1)
Publication Number | Publication Date |
---|---|
US2910A true US2910A (en) | 1843-01-16 |
Family
ID=2063204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US2910D Expired - Lifetime US2910A (en) | Improvement in making chromic yellow |
Country Status (1)
Country | Link |
---|---|
US (1) | US2910A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2133549A1 (en) * | 1971-04-22 | 1972-12-01 | Applied Power Ind Inc |
-
0
- US US2910D patent/US2910A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2133549A1 (en) * | 1971-04-22 | 1972-12-01 | Applied Power Ind Inc |
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