US1903592A - Process for the dehydration of magnesium chloride - Google Patents
Process for the dehydration of magnesium chloride Download PDFInfo
- Publication number
- US1903592A US1903592A US440637A US44063730A US1903592A US 1903592 A US1903592 A US 1903592A US 440637 A US440637 A US 440637A US 44063730 A US44063730 A US 44063730A US 1903592 A US1903592 A US 1903592A
- Authority
- US
- United States
- Prior art keywords
- magnesium chloride
- chloride
- mass
- dehydration
- magnesium
- 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
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 title description 59
- 229910001629 magnesium chloride Inorganic materials 0.000 title description 28
- 238000000034 method Methods 0.000 title description 16
- 230000018044 dehydration Effects 0.000 title description 8
- 238000006297 dehydration reaction Methods 0.000 title description 8
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 10
- 239000001103 potassium chloride Substances 0.000 description 6
- 235000011164 potassium chloride Nutrition 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- 230000036571 hydration Effects 0.000 description 3
- 238000006703 hydration reaction Methods 0.000 description 3
- 239000000395 magnesium oxide Substances 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- GHPYJLCQYMAXGG-WCCKRBBISA-N (2R)-2-amino-3-(2-boronoethylsulfanyl)propanoic acid hydrochloride Chemical compound Cl.N[C@@H](CSCCB(O)O)C(O)=O GHPYJLCQYMAXGG-WCCKRBBISA-N 0.000 description 1
- 101100020619 Arabidopsis thaliana LATE gene Proteins 0.000 description 1
- 241000212342 Sium Species 0.000 description 1
- 235000014787 Vitis vinifera Nutrition 0.000 description 1
- 240000006365 Vitis vinifera Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/26—Magnesium halides
- C01F5/30—Chlorides
- C01F5/34—Dehydrating magnesium chloride containing water of crystallisation
Definitions
- This invention is based on the surprising discovery that by adding a relatively small amount of hydrated magnesium chloride to a considerable liquid mass of magnesium chloride which has been substantially completely dehydrated and is suificiently hot, the water of hydration became vaporized and only a small amount of the chloride was converted into magnesium oxide, contrary to what would be expected.
- the present invention relates to a process for the dehydration of hydrated magnesium chloride, which consists in the use of the heat capacity of a relatively large mass of magnesium chloride which is practically anhydrous, in order to rapidly raise the temperature of a relatively small amount of magnesium chloride to be dehydrated, thus rapidly vaporizing the water without forming any great quantity of oxide.
- the mass of magnesium chloride is heated by electricity which disengages heat within the said mass, using alternating current, high frequency induction currents, etc.
- magnesium chloride It is preferable to add to the magnesium chloride a small amount of potassium chloride, and good results have been obtained with one molecule of potassium chloride for two of magnesium chloride. This lowers the temperature of fusion of the bath, and the dehydration appears to be furthered.
- the process may be carried out as follows. An alternating current is sent through a bath of practically anhydrous magnesium chloride and potassium chloride in' the proportion of at least one molecule of potassium chloride for two of magnesium chloride, thus heating the bath to at least 500 C. then adding hydrated magnesium chloride at stated intervals to the hot mass. Each addition of the hydrated material causes a rather violent boiling up, due principally to the disengagement of the water contained in the hydrated magnesium chloride so added. The amount of magnesia produced is always small. The steam thus given off must be at once removed from contact with the bath, for instance by producing a slight suction vessel.
- magnesium chloride to bedehydratedfin a ble by suitable additions and an adequate heating.
- a process of dehydration of magnesium chloride consisting of maintaining a rel ⁇ itively great mass ofanhydrous material rich in magnesium chloride in a molten state, and of adding to that mass relatively smallerv quan;
- a process of dehydration of magnesium chloride consisting of maintaining a'r'e'latively large anhydrous mass of material which is stable at a high tem erature and which is rich' in magnesium c loride, in a molten state by internally, heating the same to about .500 0., and by adding to this mass relatively smaller quantities of material containing hydrated magnesium chloride.
- a process of dehydrationof magnesium chloride consisting of maintaining a mass of anhydrous material rich in magnsium chloride in a molten state, by'heat geiierated Within said mass of material, and adding tothismass relatively smaller aiipit unts of a materialrichinhydrated magnesium chloride.
Description
Patented Apr. 11, 1931;
UNITED STATES HAROLD GEORGE LACELL, DECEASED, LATE or FI'NoHnEY, LoNDoN, ENGLAND, BY
LAC LL, EXEGUTRIX, 0F FINCHLEY, LONDON, ENGLAND PATENT orr ce PROCESS FOR. THE DEHYDRATION OIF MAGNESIUM CHLORIDE.
No Drawing. Application filed March 31, 1930, Serial No. 440,637, and in Germany April 5,1929.
on the bath, the latter being held in aclosed This invention is based on the surprising discovery that by adding a relatively small amount of hydrated magnesium chloride to a considerable liquid mass of magnesium chloride which has been substantially completely dehydrated and is suificiently hot, the water of hydration became vaporized and only a small amount of the chloride was converted into magnesium oxide, contrary to what would be expected.
The present invention relates to a process for the dehydration of hydrated magnesium chloride, which consists in the use of the heat capacity of a relatively large mass of magnesium chloride which is practically anhydrous, in order to rapidly raise the temperature of a relatively small amount of magnesium chloride to be dehydrated, thus rapidly vaporizing the water without forming any great quantity of oxide.
Preferably, the mass of magnesium chloride is heated by electricity which disengages heat within the said mass, using alternating current, high frequency induction currents, etc.
It is preferable to add to the magnesium chloride a small amount of potassium chloride, and good results have been obtained with one molecule of potassium chloride for two of magnesium chloride. This lowers the temperature of fusion of the bath, and the dehydration appears to be furthered.
The process may be carried out as follows. An alternating current is sent through a bath of practically anhydrous magnesium chloride and potassium chloride in' the proportion of at least one molecule of potassium chloride for two of magnesium chloride, thus heating the bath to at least 500 C. then adding hydrated magnesium chloride at stated intervals to the hot mass. Each addition of the hydrated material causes a rather violent boiling up, due principally to the disengagement of the water contained in the hydrated magnesium chloride so added. The amount of magnesia produced is always small. The steam thus given off must be at once removed from contact with the bath, for instance by producing a slight suction vessel.
It appears that the important point con sists in the fact of suddenly raisin the temperature of the hydrated magnesium chloride in such manner that the water will be rapidly given off, and thus will not act upon the resulting magnesium chloride. U Q
It is to be noted that the presence of the potassium chloride which is added causes no difficulties in the subsequent use of the magnesium chloride in the electrolytic vats for the production of magnesium.
Further, it is entirely feasible to add the magnesium chloride to bedehydratedfin a ble by suitable additions and an adequate heating.
What is claimed is:
ELIZA i continuous manner, provided ,the'amount of 'chlorlde added is not sufiicient to cause an ex- 1. A process for thedehydration of mag- V 'nesiuin'chloride, which comprises gradually adding, to a relatively large mass of molten anhydrous magnesium chloride, relatively small quantities of hydrated magnesium chloride, thus causing a rapid vaporization. of the water of hydration and thereby preventing the formation of magnesium oxide. '2. Process in conformity to the claim 1,
characterized bythe fact that the temperature of the melted mass is maintained at about 500 (1, and between relatively narrow limits by regulating the heating and byregulating the quantities of the hydrated chloride of magnesium added. I I l 3. Process in conformity to the claim 1, characterized by the fact that the melted mass is heated by heat generated electrically within the body of the mass.
4:. Process in conformity to the claim 1 characterized by the fact of adding potassium chloride to the mass of anhydrous magnesium chloride in order to lower the melting point.
5. Process in conformity to the claim 1 characterized by the fact that the liquid mass is maintained during such process under a partial vacuum to facilitate the vaporizing and removal of the Water of hydration.
6. A process of dehydration of magnesium chloride consisting of maintaining a rel}itively great mass ofanhydrous material rich in magnesium chloride in a molten state, and of adding to that mass relatively smallerv quan;
' 7. A process ofdehydration of magnesium V chloride consisting of maintainingan anhydrousmass relatively rich in magnesium chloride in a molten state, by a heatingthereof without action on the composition offsa'id chloride, and adding to that mass relatively smaller quantities of material rich in hy- 'drated magnesium chloride. LZO
,8. A process of dehydration of magnesium "chloride consisting of maintaining'a relativel'y great mass of material rich inmag'nesiuin chloride in a molten state by heating the said mass to about 500 (3., and adding to that mass relatively smaller amounts of a mass containing hydrated magnesium chloride. n
9. A process of dehydration of magnesium chloride consisting of maintaining a'r'e'latively large anhydrous mass of material which is stable at a high tem erature and which is rich' in magnesium c loride, in a molten state by internally, heating the same to about .500 0., and by adding to this mass relatively smaller quantities of material containing hydrated magnesium chloride. I
'10. A process of dehydrationof magnesium chloride consisting of maintaining a mass of anhydrous material rich in magnsium chloride in a molten state, by'heat geiierated Within said mass of material, and adding tothismass relatively smaller aiipit unts of a materialrichinhydrated magnesium chloride.
p '11. A process of dehydration oif'iiiag'ri} sium chloride which comprises'maiiitaining a relatively great quantity of substantiallyaiihydrous material rich in magneslum chloride, at a'temperature at which such material is molten, and While under a pressure below normal atmospheric, and adding to that mass relatively smaller quantities of a material rich in hydrated magnesium chloride. I V f In testimony whereof I have signed this specification.
ELIZA LACEL Emecutm'w of Harold George, L doell', 'D-
- ceased.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL74730D DE545194C (en) | 1929-04-05 | 1929-04-05 | Dehydration of magnesium for electrolysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1903592A true US1903592A (en) | 1933-04-11 |
Family
ID=6254654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US440637A Expired - Lifetime US1903592A (en) | 1929-04-05 | 1930-03-31 | Process for the dehydration of magnesium chloride |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1903592A (en) |
| BE (1) | BE375776A (en) |
| DE (1) | DE545194C (en) |
| FR (1) | FR693232A (en) |
| GB (1) | GB345518A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2653561A (en) * | 1949-06-20 | 1953-09-29 | United Aircraft Prod | Metalworking machine |
| US3341282A (en) * | 1965-04-14 | 1967-09-12 | Exxon Research Engineering Co | Dehydration magnesium chloride utilizing alcohol solution and ammonia |
| US3346333A (en) * | 1965-05-04 | 1967-10-10 | Exxon Research Engineering Co | Dehydration of magnesium chloride utilizing fluid bed spray drying in atmosphere of hci |
| US3395977A (en) * | 1965-12-20 | 1968-08-06 | Exxon Research Engineering Co | Anhydrous magnesium chloride production |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3336107A (en) * | 1965-03-25 | 1967-08-15 | Exxon Research Engineering Co | Dehydration of magnesium chloride |
-
1929
- 1929-04-05 DE DEL74730D patent/DE545194C/en not_active Expired
-
1930
- 1930-03-31 US US440637A patent/US1903592A/en not_active Expired - Lifetime
- 1930-04-03 FR FR693232D patent/FR693232A/en not_active Expired
- 1930-04-05 GB GB10913/30A patent/GB345518A/en not_active Expired
- 1930-12-13 BE BE375776D patent/BE375776A/xx unknown
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2653561A (en) * | 1949-06-20 | 1953-09-29 | United Aircraft Prod | Metalworking machine |
| US3341282A (en) * | 1965-04-14 | 1967-09-12 | Exxon Research Engineering Co | Dehydration magnesium chloride utilizing alcohol solution and ammonia |
| US3346333A (en) * | 1965-05-04 | 1967-10-10 | Exxon Research Engineering Co | Dehydration of magnesium chloride utilizing fluid bed spray drying in atmosphere of hci |
| US3395977A (en) * | 1965-12-20 | 1968-08-06 | Exxon Research Engineering Co | Anhydrous magnesium chloride production |
Also Published As
| Publication number | Publication date |
|---|---|
| BE375776A (en) | 1931-01-31 |
| GB345518A (en) | 1931-03-26 |
| DE545194C (en) | 1932-02-26 |
| FR693232A (en) | 1930-11-18 |
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