US1533779A - Method of bleaching barytes - Google Patents
Method of bleaching barytes Download PDFInfo
- Publication number
- US1533779A US1533779A US709692A US70969224A US1533779A US 1533779 A US1533779 A US 1533779A US 709692 A US709692 A US 709692A US 70969224 A US70969224 A US 70969224A US 1533779 A US1533779 A US 1533779A
- Authority
- US
- United States
- Prior art keywords
- barytes
- acid
- bleaching
- treating
- iron
- 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
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 title description 21
- 238000000034 method Methods 0.000 title description 14
- 238000004061 bleaching Methods 0.000 title description 11
- 239000002253 acid Substances 0.000 description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000011707 mineral Substances 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000001117 sulphuric acid Substances 0.000 description 3
- 235000011149 sulphuric acid Nutrition 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910000754 Wrought iron Inorganic materials 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000013058 crude material Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 235000011167 hydrochloric acid Nutrition 0.000 description 1
- 229960000443 hydrochloric acid Drugs 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- -1 wrought iron Chemical compound 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
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/02—Compounds of alkaline earth metals or magnesium
- C09C1/027—Barium sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
Definitions
- This inventiom relates to the art of bleacl1- ing barytes, and more particularly to render .it suitable for use in the In the art of bleaching'barytes as heretofore practiced, the crude material is crushed to suitable size and 'Washed until free from clay and other adhering impurities, It is then placed in suitable mills, usually of the ball or tube type and reduced to the desired fineness. The fine material is then placed in a suitablecontainer and acid (usually so]- phuric acid) added and the mixture is boiled until a sample shows that the desired degree of bleaching'has'been attained.
- a suitablecontainer and acid usually so]- phuric acid
- the action of the acid is to leach out the impurities which are usually present in the form oi oxides of iron, manganese, etc, some of which are diflicultly soluble in acid, and some of which may not be completely soluble.
- the time required is, therefore, not only extendedand not only is the amount of acid required considerable, but the result may not be a product of the desired color.
- One of the objects of this invention is to develop a method or processof bleaching in which the time required is not only reduced but in which the resulting 'product is of a superior color.
- reducing agent is present in the mixture during, the blcacln much less'time is required for the operation and that the resulting product is of superior color.
- reducing agents which may be used for this purpose, for example, stannous and titanous salts, the metals which react with acid with liberation of hydrogen, electrolysis, etc: an agent especially suitable and convenient for this purpose is metallic iron.
- the barytes is treated with a suitable acid in the presence of av reducing agent
- This hydrogen is pref I erably liberated by the .action of an agent, such as described.
- an agent such as described.
- a-metal it is preferably such that its salt is soluble; and'where iron is used, it is preferably one which is low in carbon, such as Wrought iron.
- the acid used is preferably sulphuric acid, although other acids, such as hydro-chloric acid maybe used.
- the process or method may be carried out asfollows: Crude barytes is crushed to about 1-inch mesh, washed .with Water and wet ground in a tube mill to a suitable fineness, such as250 mesh, and water floated to,
- the resulting finely dividedbarytes usually in the form I of a slurry containing 10 to percent water is pumped into a suitable tank and sulphuric acid' added.
- the amount of acid used may be varied considerably, from 1 to 4 tons Be. acid to 30 tons of slurry has been found to be. satisfactory.
- metallic iron such as wrought iron, which for convenience may be in the'form of bars.
- the amount of iron required depends upon the impurities originally present in the barytes and may be'readily determined by trial.
- the mixture is then boiled bythe inof the desiredcolor.
- the bleached barytes is then washed and dried.
- -arytes consist jection of live steam until the barytes is till ing in treating the barytes with a mineral acid in the presence of a gaseous reducing agent.
- a method of bleaching barytes consisting in treating the barytes with a mineral acid in the presence of hydrogen.
- a method of bleaching barytes consisting in treating the barytes with a mineral acid in the presence of an agent which reacts with the acid with liberation of hydrogen.
- a method of bleaching barytes consisting in'treating the barytes with a. mineral acid in the presence of a metal which reacts with the acid with liberation of hydrogen.
- a method of bleaching bar es consistsoluble.
- U A method of bleaching barytes consisting in treating the barytes with a mineral acid in the presence of metallic iron.
- a method of bleaching barytes consisting in treating the barytes with sulphuric acid in the presence of low carbon iron.
Description
and allied industries.
I Patented Apr. 14, 1925 UNITED STATES" PATENT- OFFICE.-
WILLIS r. wasmsunu, or s'r, LOUIS, mssoum, Assrcivon'ro'unriouar rremnnrs &
, CHEMICAL COMPANY, or $17. tours; MISSOURI, A CORPORATION or mssoum.
mnrnon or 'BLEACHILNG ,BARY'TES;
No Drawing;
To all whom it may concern:
Be it known that I, WILLIS F. WAsnnURN,
a citizen of the Uni-ted States, and residing at St. Louis, State of Missouri, have invented the new and useful Improvement in Methods of Bleaching Baryte's, of which thefollovving is a specification.
This inventiomrelates to the art of bleacl1- ing barytes, and more particularly to render .it suitable for use in the In the art of bleaching'barytes as heretofore practiced, the crude material is crushed to suitable size and 'Washed until free from clay and other adhering impurities, It is then placed in suitable mills, usually of the ball or tube type and reduced to the desired fineness. The fine material is then placed in a suitablecontainer and acid (usually so]- phuric acid) added and the mixture is boiled until a sample shows that the desired degree of bleaching'has'been attained. The action of the acid is to leach out the impurities which are usually present in the form oi oxides of iron, manganese, etc, some of which are diflicultly soluble in acid, and some of which may not be completely soluble. The time required is, therefore, not only extendedand not only is the amount of acid required considerable, but the result may not be a product of the desired color.
One of the objects of this invention, therefore, is to develop a method or processof bleaching in which the time required is not only reduced but in which the resulting 'product is of a superior color.
Further objects will appear from the'detail description in which an embodiment of this invention will be described; it wil however, be understood that the invention may be exei'nplified in other embodiments.
I have discovered that it a reducing agent is present in the mixture during, the blcacln much less'time is required for the operation and that the resulting product is of superior color. There are many reducing agents which may be used for this purpose, for example, stannous and titanous salts, the metals which react with acid with liberation of hydrogen, electrolysis, etc: an agent especially suitable and convenient for this purpose is metallic iron.
enerally stated in accordance with this invention the barytes is treated with a suitable acid in the presence of av reducing agent,
paint, rubber, color Application filed April 28, 1924. Serial Nb. 709,652;
such as hydrogen.v This hydrogen is pref I erably liberated by the .action of an agent, such as described. Where a-metal is used, it is preferably such that its salt is soluble; and'where iron is used, it is preferably one which is low in carbon, such as Wrought iron.
The acid used is preferably sulphuric acid, although other acids, such as hydro-chloric acid maybe used. Y I
As a practical embodiment of this invention, the process or method may be carried out asfollows: Crude barytes is crushed to about 1-inch mesh, washed .with Water and wet ground in a tube mill to a suitable fineness, such as250 mesh, and water floated to,
eliminate any coarse particles; The resulting finely dividedbarytes, usually in the form I of a slurry containing 10 to percent water is pumped into a suitable tank and sulphuric acid' added. The amount of acid used may be varied considerably, from 1 to 4 tons Be. acid to 30 tons of slurry has been found to be. satisfactory. There is then introduced into the treating tank a suitable quantity of metallic iron, such as wrought iron, which for convenience may be in the'form of bars. The amount of iron required depends upon the impurities originally present in the barytes and may be'readily determined by trial. The mixture is then boiled bythe inof the desiredcolor. The bleached barytes is then washed and dried.
As a result of the improved method or process not only is the resulting product of a superior color, but much less time is required for the operation in order to secure that result.- The action is probably due to the reduction of the difticultly soluble or in soluble oxides crother impurities to the more ited to the specific details described.
Having thus described the invention, What is claimed is:
It. A method oi: bleaci'im r .1
-arytes consist jection of live steam until the barytes is till ing in treating the barytes with a mineral acid in the presence of a gaseous reducing agent.
2. A method of bleaching barytes consisting in treating the barytes with a mineral acid in the presence of hydrogen.
3. A method of bleaching barytes consisting in treating the barytes with a mineral acid in the presence of an agent which reacts with the acid with liberation of hydrogen.
4. A method of bleaching barytes consisting in'treating the barytes with a. mineral acid in the presence of a metal which reacts with the acid with liberation of hydrogen.
'ing in treating the barytes wit acid in the presence of a metal whose salt is 5. A method of bleaching bar es consistsoluble.
U. A method of bleaching barytes consisting in treating the barytes with a mineral acid in the presence of metallic iron.
7. A method of bleaching barytes consisting in treating the barytes with sulphuric acid in the presence of low carbon iron.
In testimony whereof I aflix my signature this 5th day of April, 1924.
WILLIS F. WASHBURN.
a mineral
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US709692A US1533779A (en) | 1924-04-28 | 1924-04-28 | Method of bleaching barytes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US709692A US1533779A (en) | 1924-04-28 | 1924-04-28 | Method of bleaching barytes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1533779A true US1533779A (en) | 1925-04-14 |
Family
ID=24850949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US709692A Expired - Lifetime US1533779A (en) | 1924-04-28 | 1924-04-28 | Method of bleaching barytes |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1533779A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4119700A (en) * | 1976-06-24 | 1978-10-10 | Stone Dennis W J | Production of pharmaceutical barium sulphate |
-
1924
- 1924-04-28 US US709692A patent/US1533779A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4119700A (en) * | 1976-06-24 | 1978-10-10 | Stone Dennis W J | Production of pharmaceutical barium sulphate |
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