US429534A - Achilles de khotinsky - Google Patents
Achilles de khotinsky Download PDFInfo
- Publication number
- US429534A US429534A US429534DA US429534A US 429534 A US429534 A US 429534A US 429534D A US429534D A US 429534DA US 429534 A US429534 A US 429534A
- Authority
- US
- United States
- Prior art keywords
- cellulose
- acid
- conductors
- colloid
- khotinsky
- 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
- 229920002678 cellulose Polymers 0.000 description 26
- 239000001913 cellulose Substances 0.000 description 26
- 239000004020 conductor Substances 0.000 description 22
- 239000002253 acid Substances 0.000 description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 14
- 229910052799 carbon Inorganic materials 0.000 description 14
- 239000000084 colloidal system Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 235000011149 sulphuric acid Nutrition 0.000 description 10
- 239000001117 sulphuric acid Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 239000012153 distilled water Substances 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 235000019441 ethanol Nutrition 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N HF Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 2
- 108060007338 SDHAF4 Proteins 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000003472 neutralizing Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000001376 precipitating Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000020357 syrup Nutrition 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/312—Preparation
- C01B32/318—Preparation characterised by the starting materials
- C01B32/324—Preparation characterised by the starting materials from waste materials, e.g. tyres or spent sulfite pulp liquor
Definitions
- the object of my invention consists in the manufacture of carbon conductors for incandescent lamps which do not possess the said disadvantages.
- I use as raw material natural purified cellulose, preferably cotton which has been freed from fatty mat-- ter, and thereupon treated with muriatie or hydrofluoric acid, or both, in view of extracting mineral substances.
- Such cellulose I treat in well-dried state with sulphuric acid having a density of about Baum.
- the resulting gelatinous mass is washed first with water and thereupon with alcohol, so as to free the same from every trace of acid.
- the product thus obtained is colloid cellulose, which is absolutely homogeneous and amorphous, and which possesses the remarkable property of being soluble in distilled water. (This property is, however, inherent to the substance only if it is entirely void of acid.) From the said colloid cellulose carbon conduetors may be produced in two different manners.
- the colloid cellulose is dissolved in distilled water, the solution is poured on plates of glass, and the water is allowed to Serial N0.339,081. (No model.)
- the plates of cellulose thus ob tained are cut or otherwise divided into strips. Previous to their being divided the plates may be passed between smooth rollers or pressed between even metal plates for the purpose of increasing their density and making their thickness more uniform.
- the colloid cellulose is dissolved in distilled Water, the solution is evaporated in oacuo with the aid of sulphuric acid to the consistency of sirup, and this mass is pressed through a'perforated plate having orifices of the desired form and size, the threads issuing from the said orifices being collected in a vessel containing ethyl alcohol, or any other suitable liquid which has the property of precipitating cellulose from its solutions in amorphous state.
- These strips or threads are carbonized as usual, and employed in the manufacture of incandescent lamps in known manner.
Description
' UNITED STATES- Q'FFICE.
" ATENT AOHILLES DE KHOTINZSKY, OF GELNHAUSEN, PRUSSIA, GERMANY.
SPECIFICATION forming part of Letters Patent No. 429,534, dated June 3, 1890.
Application filed February 3, 1890.
To all whom it may concern:
Be it known that I, ACHILLES DE KHOTIN- SKY, a subject of the Emperor of Russia, residing at Gelnhausen, Kingdom of Prussia, Germany, have invented new and useful Iniprovements in the Manufacture of Carbon Conductors for Electric Incandescent Lamps, whereof the following is a specification.
From the raw materials heretofore nearly exclusively employed in the production of carbon conductors for incandescent lamps it is difficult in an extensive manufacture to obtain a considerable number of conductors that are absolutely alike in transverse section and in quality. From this deficiency there results in the employment of the conductors in incandescent lamps an unequal luminous power and unequal consumption of current. The cause of this deficiency is that the raw material has a fibrous structure, which is still present in the conductors after their carbonization, as may be plainly observed under the microscope, and Wherefrom results a low degree of elasticity and inconsiderable and non-uniform density of the conductors.
The object of my invention consists in the manufacture of carbon conductors for incandescent lamps which do not possess the said disadvantages. For this purpose I use as raw material natural purified cellulose, preferably cotton which has been freed from fatty mat-- ter, and thereupon treated with muriatie or hydrofluoric acid, or both, in view of extracting mineral substances. Such cellulose I treat in well-dried state with sulphuric acid having a density of about Baum. The resulting gelatinous mass is washed first with water and thereupon with alcohol, so as to free the same from every trace of acid. The product thus obtained is colloid cellulose, which is absolutely homogeneous and amorphous, and which possesses the remarkable property of being soluble in distilled water. (This property is, however, inherent to the substance only if it is entirely void of acid.) From the said colloid cellulose carbon conduetors may be produced in two different manners.
First. The colloid cellulose is dissolved in distilled water, the solution is poured on plates of glass, and the water is allowed to Serial N0.339,081. (No model.)
evaporate. The plates of cellulose thus ob tained are cut or otherwise divided into strips. Previous to their being divided the plates may be passed between smooth rollers or pressed between even metal plates for the purpose of increasing their density and making their thickness more uniform.
Second. The colloid cellulose is dissolved in distilled Water, the solution is evaporated in oacuo with the aid of sulphuric acid to the consistency of sirup, and this mass is pressed through a'perforated plate having orifices of the desired form and size, the threads issuing from the said orifices being collected in a vessel containing ethyl alcohol, or any other suitable liquid which has the property of precipitating cellulose from its solutions in amorphous state. These strips or threads are carbonized as usual, and employed in the manufacture of incandescent lamps in known manner. I
By means of the described process an unlimited number of carbon conductors may be produced which are absolutely alike in their physical properties, in their transverse section, and in density. Besides this, the new conductors have greater density than other carbon conductors, as is proved by theirhigher specific gravity and inferior specific resistance. Finally, their elasticity is such that when having horseshoe form, or even when made with a loop, they may be bent straight without breaking, while on being thereafter released they rebound to their original state like a steel spring.
I am aware that heretofore conductors for electric lamps have been produced by converting fibrous cellulose by means of sulphuric acid into a gelatinous or fluid substance, forming sheets or strips therefrom,
and treating these with an alkali in view of neutralizing the acid. In this case the solvent contained in the said substance is sulphuric acid, and the acid is neutralized after the sheets or strips have been formed. In contradistinction to this method I produce gelatinous (colloid) cellulose which is soluble in water, a productheretofore entirely unknown, the said product being indeed also obtained by treating the fibrous cellulose in the first place with sulphuric acid, but only under the condition that the acid have a determinate degree of concentration of 50 Baum, or a little above or below, and in thereupon washing the colloid cellulose first with water, (which does not actas solvent so long as any acid remains in the substance,) and subsequently with alcohol, in View of removing, the last traces of acid. From this product I then make the sheets, plates, or threads by dissolving it in pure water and proceeding further as described. The acid is therefore according to my process completely removed from the colloid cellulose before it is formed into plates or threads.
I claim as my invention The process of manufacturing carbon con- ACIIILLES DE KHOTINSKY.
Witnesses:
J EAN GRUND, ALVESTO S. HOGUE.
Publications (1)
Publication Number | Publication Date |
---|---|
US429534A true US429534A (en) | 1890-06-03 |
Family
ID=2498443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US429534D Expired - Lifetime US429534A (en) | Achilles de khotinsky |
Country Status (1)
Country | Link |
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US (1) | US429534A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070021519A1 (en) * | 2003-10-22 | 2007-01-25 | Milliren Charles M | Viscoelastic foam layer and composition |
EP2022801A1 (en) * | 2007-08-10 | 2009-02-11 | Dow Wolff Cellulosics GmbH | Nanoparticles made of amorphous cellulose |
-
0
- US US429534D patent/US429534A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070021519A1 (en) * | 2003-10-22 | 2007-01-25 | Milliren Charles M | Viscoelastic foam layer and composition |
EP2022801A1 (en) * | 2007-08-10 | 2009-02-11 | Dow Wolff Cellulosics GmbH | Nanoparticles made of amorphous cellulose |
WO2009021687A1 (en) * | 2007-08-10 | 2009-02-19 | Dow Global Technologies Inc. | Nanoparticles of amorphous cellulose |
US8722092B2 (en) | 2007-08-10 | 2014-05-13 | Dow Global Technologies Llc | Nanoparticles made of amorphous cellulose |
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