USRE9340E - Manufacture of aluminous cake - Google Patents
Manufacture of aluminous cake Download PDFInfo
- Publication number
- USRE9340E USRE9340E US RE9340 E USRE9340 E US RE9340E
- Authority
- US
- United States
- Prior art keywords
- alumina
- sulphate
- manufacture
- iron
- aluminous
- Prior art date
Links
- 235000012970 cakes Nutrition 0.000 title description 8
- 238000004519 manufacturing process Methods 0.000 title description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 42
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 26
- 239000000243 solution Substances 0.000 description 20
- 229910052742 iron Inorganic materials 0.000 description 18
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 18
- 239000002253 acid Substances 0.000 description 10
- 229910001570 bauxite Inorganic materials 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 10
- 239000011701 zinc Substances 0.000 description 10
- 229910052725 zinc Inorganic materials 0.000 description 10
- 229910000460 iron oxide Inorganic materials 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000001117 sulphuric acid Substances 0.000 description 4
- 235000011149 sulphuric acid Nutrition 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 2
- PZZYQPZGQPZBDN-UHFFFAOYSA-N Aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N Iron(III) oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 235000012211 aluminium silicate Nutrition 0.000 description 2
- -1 argil Chemical compound 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000010908 decantation Methods 0.000 description 2
- 150000004677 hydrates Chemical class 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000001264 neutralization Effects 0.000 description 2
- 229940072033 potash Drugs 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 2
- KWYUFKZDYYNOTN-UHFFFAOYSA-M potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
- UTYXJYFJPBYDKY-UHFFFAOYSA-N tetrapotassium;iron(2+);hexacyanide;trihydrate Chemical compound O.O.O.[K+].[K+].[K+].[K+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] UTYXJYFJPBYDKY-UHFFFAOYSA-N 0.000 description 2
Definitions
- the object of this invention is to manufacture from aluminous earths containing IDOL; or less iron, such as argil, kaolin, &c., and by preference with hydrates of alumina, known under the name of bauxites, and containing fifty to eighty per cent. of alumina, a sulphate of alumina completely deprived of free acid, and exempt or almost exempt from iron, in such form or combination n.0, as would discolor the resulting sulphate of alumina, and thus to produce from the above ferruginous clays a white sulphate of alumina such out time.
- v I proceed in the following manner: Into a vessel of lead, or lined with lead, I pour a certain quantity of sulphuric acid at Baum-two hundred kilograms, for instance. I beat it by means of a jet of live steam. When the sulphuric-acid begins to boil I pour into the acid one hundred and ten to one huntired and thirty kilograms of bauxite (hydrate tion ought to occupy only one-fifth at most of the capacity of the vessel, will even how over if care is not taken to add at this moment sixty to sixty-five liters of water. The mixture is thus kept in the vessel, and if it threatens again to flow over I add some liters of water to prevent it.
- the sulphate-of-alumina solution containing iron in this form is to a great degree discolored by its presence, the result being that for many purposes, such as paper-making, sulfate-of-alumina solution containing iron in this form is to a great degree discolored by its presence, the result being that for many purposes, such as paper-making, sulfate-of-alumina solution containing iron in this form is to a great degree discolored by its presence, the result being that for many purposes, such as paper-making, sulfate-of-alumina solution containing iron in this form is to a great degree discolored by its presence, the result being that for many purposes, such as paper-making, sulfate-of-alumina solution containing iron in this form is to a great degree discolored by its presence, the result being that for many purposes, such as paper-making, sulfate-of-alumina solution containing iron in this form is to a great degree discolored by its presence, the result being that for many purposes, such as
- the zinc is attacked, and at the end of four to five hours when under the influence of heat, and one totwo days at ordinary temperature, the iron is converted from Fe O to Fe( the latter article forming a colorless compound of iron, and at the same time any silica or other impurities not already precipitated are deposited in the bottom of the vessel. It now only remains to siphon'or decantthe limpid solution, which is absolutely deprived of free acid, and does not readily become .blue by testing with yellow prussiate of pot-ash in the usual manner.
- the product obtained by the process above described consists, essentially, of sulphate of alumina, sulphate of zinc, and sulphate of protoxide of iron in varying quantities, depending on the composition of the bauxite or other alnminous earth employed, and is, first, completely exemptfrom free acid; second, not hygroscopic and not absorbent of moisture; third, capable of being ground as finely as may be desired; fourth, possessing a quantity of alumina which may reach twenty per cent, and which is never lower than eighteen per cent.; and, fifth, white.
- These qualities are not met with in the sulphates of alumina made from ferruginous clays and hitherto met in l 2.
Description
- as has not been 1 UNITED) STATES FRANCIS LAUR, OF PARIS, FRANCE, ASSIGNOR TO HARRISON BROTHERS & (30., OF PHILADELPHIA, PENNSYLVANIA.
MANUFACTURE OF/ALUMINOUS CAKE.
SPECIFICATION forming part of Reissued Letters' Patent No. 9,340, dated August 10, 188(,
Original No. 208,615, dated October 1, 187B Reissue No. 8,882, dated September 2, 1879 Patented in France December 1, 1876, in Great Britain September 5, 1877, in Italy September 15, 1877, and in Germany June 1, 1878. Application for reissue filed July 1, 1880.
To all whom it may concern:
Be it known that I, Fusucrs LAUR, en-
gineer, of Paris, in the Republic of France,
' in g is a specification.
The object of this invention is to manufacture from aluminous earths containing IDOL; or less iron, such as argil, kaolin, &c., and by preference with hydrates of alumina, known under the name of bauxites, and containing fifty to eighty per cent. of alumina, a sulphate of alumina completely deprived of free acid, and exempt or almost exempt from iron, in such form or combination n.0, as would discolor the resulting sulphate of alumina, and thus to produce from the above ferruginous clays a white sulphate of alumina such out time.
v I proceed in the following manner: Into a vessel of lead, or lined with lead, I pour a certain quantity of sulphuric acid at Baum-two hundred kilograms, for instance. I beat it by means of a jet of live steam. When the sulphuric-acid begins to boil I pour into the acid one hundred and ten to one huntired and thirty kilograms of bauxite (hydrate tion ought to occupy only one-fifth at most of the capacity of the vessel, will even how over if care is not taken to add at this moment sixty to sixty-five liters of water. The mixture is thus kept in the vessel, and if it threatens again to flow over I add some liters of water to prevent it. At the end of about an hour the mixture has returned to its original volume. 1 then add water at pleasure, according to the degree of concentration which it is desired to obtain, and I thus have a solution of sulphate of alumina containing about one-half per cent. of iron in combination in the form 'of Fe 0 5. I
The sulphate-of-alumina solution containing iron in this form is to a great degree discolored by its presence, the result being that for many purposes, such as paper-making, sul
manufactured up to the pres-' phate of alumina containing Fe,(), is greatly reduced in value. The unattacked silicate of the bauxite and the unattached bauxite slowly precipitate and are veryeasily separated by decantation. To convert the ferric oxide (F9 0 present in the solution of sulphate of alumina into ferrous oxide (FeO) and thus produce an aluminous cake free from color, I merely introduce old pieces of zinc into the ferrnginous solution of sulph ate-three to five kilograms in the example given. The zinc is attacked, and at the end of four to five hours when under the influence of heat, and one totwo days at ordinary temperature, the iron is converted from Fe O to Fe( the latter article forming a colorless compound of iron, and at the same time any silica or other impurities not already precipitated are deposited in the bottom of the vessel. It now only remains to siphon'or decantthe limpid solution, which is absolutely deprived of free acid, and does not readily become .blue by testing with yellow prussiate of pot-ash in the usual manner.
In the example chosen--that is to say, two hundred kilograms of acid at 50-there is obtained three hundred kilograms of sulphate of alumina in solut-ion,.which itis only necessary to concentrate niider heat up to 46 Baum and pour it olf into a cake by the ordinary method.
It is indispensable to employ a bauxite very finely ground, or to increase the proportion of it, to obtain at the first trial a neutral solution or almostneutral (basic) solution.
The product obtained by the process above described consists, essentially, of sulphate of alumina, sulphate of zinc, and sulphate of protoxide of iron in varying quantities, depending on the composition of the bauxite or other alnminous earth employed, and is, first, completely exemptfrom free acid; second, not hygroscopic and not absorbent of moisture; third, capable of being ground as finely as may be desired; fourth, possessing a quantity of alumina which may reach twenty per cent, and which is never lower than eighteen per cent.; and, fifth, white. These qualities are not met with in the sulphates of alumina made from ferruginous clays and hitherto met in l 2. A-i'i nlunrinouscompound for paper-makcommerce, and they may serve to' characterize ers use, as describe 1, iii-.cuke-or ground form,-
the new product resulting" from the process I containing sn'lplmteof zinc; v have described. Intestimonywho-1230f-[:huxell'oleunto signed 5 I 1 i my namethis 1st day'offJiun1arv,-A I); 15380;:
1. As an improvement in the process of I manufacturing aluminous cake-vim, firstmak- F'. LAUR.
ing aneutral solution of the same, and then introducing pieces of zinc to convert the iron In presence ofto into a colorless compound of iron in the said MORITZ HARTWIG,
solution prior to concentration, substantially A. HUTTE.
as described.
Family
ID=
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