US1395685A - Manufacture of alkali perborates - Google Patents
Manufacture of alkali perborates Download PDFInfo
- Publication number
- US1395685A US1395685A US145018A US14501817A US1395685A US 1395685 A US1395685 A US 1395685A US 145018 A US145018 A US 145018A US 14501817 A US14501817 A US 14501817A US 1395685 A US1395685 A US 1395685A
- Authority
- US
- United States
- Prior art keywords
- bicarbonate
- alkali
- manufacture
- soda
- borax
- 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
- 239000003513 alkali Substances 0.000 title description 13
- 238000004519 manufacturing process Methods 0.000 title description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 15
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 10
- 229910021538 borax Inorganic materials 0.000 description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Substances [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000004328 sodium tetraborate Substances 0.000 description 9
- 235000010339 sodium tetraborate Nutrition 0.000 description 9
- 235000011121 sodium hydroxide Nutrition 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229960001922 sodium perborate Drugs 0.000 description 1
- YKLJGMBLPUQQOI-UHFFFAOYSA-M sodium;oxidooxy(oxo)borane Chemical compound [Na+].[O-]OB=O YKLJGMBLPUQQOI-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/28—Per-compounds
- C25B1/32—Perborates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
- C01B15/055—Peroxyhydrates; Peroxyacids or salts thereof
- C01B15/12—Peroxyhydrates; Peroxyacids or salts thereof containing boron
Definitions
- OTTO LIEBKNECHT OF FRANKFORT-ON-THE-MAIN, GERMANY, ASSIGNOR, To THE ROESSLER & HASSLACHEB, CHEMICAL COMPANY, OF NEW YORK, N. Y., A. 003- PORATION OF NEW YORK.
- My invention relates to the manufacture of alkali perborates such as, forinstance, sodium perborate, and in particular to the electrolytic manufacture of alkali perborates from lyes containing soda and borax. It is the object of my present invention to provide improvements in the electrolytlc manufacture of alkali perborates from lyes containing soda and borax, the said improvements resulting in a purer and more stable perborate, and incidentally, 1n a more economical operation.
- an alternative method consists in removing the carbonic acid from the waste lye prior to its repeated utilization.
- the carbonic acid present as bicarbonate with lime in order to convert the bicarbonate into soda, I have found that it is not advantageous to carry this caustification to an extent to produce free alkali although the free alkali is used for the formation of metaborate by the coaction of borax and is again converted into soda by the carbonic acid forming during the electrolytic action.
- lime other earth-alkali hydrates or oxids or free alkali could likewise be use for neutralization.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Description
warren mm FA'FEMT @FFEQE.
OTTO LIEBKNECHT, OF FRANKFORT-ON-THE-MAIN, GERMANY, ASSIGNOR, To THE ROESSLER & HASSLACHEB, CHEMICAL COMPANY, OF NEW YORK, N. Y., A. 003- PORATION OF NEW YORK.
MANUFACTURE OF ALKALI PERBORATES.
No Drawing.
T 0 all whom it may concern:
Be it known that I, OT'roLIEBKNEoH'r, a subject of the German Emperor, and resident of Frankfort-on-the-Main, Germany, have invented certain new and useful Improvements in the Manufacture of Alkali Perborates, of which the following is a specification.
My invention relates to the manufacture of alkali perborates such as, forinstance, sodium perborate, and in particular to the electrolytic manufacture of alkali perborates from lyes containing soda and borax. It is the object of my present invention to provide improvements in the electrolytlc manufacture of alkali perborates from lyes containing soda and borax, the said improvements resulting in a purer and more stable perborate, and incidentally, 1n a more economical operation.
In electrolytically producing alkali perborates from lyes containing soda and borax, it has been found that the proportion of bicarbonate in the electrolyte gradually increases so that finally the bicarbonate is precipitated synchronously with the perborate and dilutes the latter. The bicarbonate thus precipitated not only produces an undesirable dilution of the perborate, but it has been found that the same involves the further drawback of exercising an unfavorable influence on the stability of the perborate. According to the inventors investigations, the undesired formation of the bicarbonate appears to be due to the fact that the carbonic! acid released during the process combines to its greater part with the soda contained in the solution; a phenomenon being somewhat surprising as generally carbO(I11lC acid does not readily combine with so a.
On account of this knowledge care is to be taken in producing alkali-perborate electrolytically to avoid an excessive rise in the proportion of bicarbonate in the lye. This can be attained for instance, by entirely, or
' partly, replacing the addition of soda and borax, required to supply the alkali and boric acid consumed as rate, by metaborate or y free alkali and borax. In such a manner an undesired strong formation of bicarbonate, already Specification of Letters Patent.
recipitated perbo- Patented N 0V. 1, 1921.
Application .filed January 27, 1917. Serial No. 145,018.
during the electrolysis can be prevented and the proportlon in the lye be kept favorable for the electrolytic process.
In the electrolyzing of solutions saturated with soda and borax, synchronous precipitation of bicarbonate does not take place unless the proportion of bicarbonate in the ialtectrolyte exceeds about 70 to 75 grams per An example may illustrate the process.
A solution saturated with soda and borax was electrolyzed. On completion of the first stage of the operation the electrolyte contained 42 grams of bicarbonate per liter. After removal of the perborate the lye saturated with soda and borax became subjected to a second treatment oncompletion of which the proportion of bicarbonate had risen to 74 grams per liter electrolyte.
In order to prevent a further increase of the proportion of bicarbonate, from 16 to 18 grams of sodium hydrate were added to each liter of the electrolyte prior to reach further treatment; the result of this additlon of sodium hydrate was that the proportion of bicarbonate averaged 60 grams per liter of the electrolyte on completion of each operation. The perborate produced was practically free of bicarbonate, and .Very stable. 1
Instead of combining with an alkali the carbonic acid produced during the opera tion, an alternative method consists in removing the carbonic acid from the waste lye prior to its repeated utilization. For instance in combining the carbonic acid present as bicarbonate with lime in order to convert the bicarbonate into soda, I have found that it is not advantageous to carry this caustification to an extent to produce free alkali although the free alkali is used for the formation of metaborate by the coaction of borax and is again converted into soda by the carbonic acid forming during the electrolytic action. Instead of lime, other earth-alkali hydrates or oxids or free alkali could likewise be use for neutralization.
This alternative method will be explained by another example.
A waste lye having twice been used as an electrolyte and containing thereafter 72
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US145018A US1395685A (en) | 1917-01-27 | 1917-01-27 | Manufacture of alkali perborates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US145018A US1395685A (en) | 1917-01-27 | 1917-01-27 | Manufacture of alkali perborates |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1395685A true US1395685A (en) | 1921-11-01 |
Family
ID=22511232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US145018A Expired - Lifetime US1395685A (en) | 1917-01-27 | 1917-01-27 | Manufacture of alkali perborates |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1395685A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3038842A (en) * | 1958-01-08 | 1962-06-12 | Electro Chimie Metal | Process of making sodium perborate by electrolysis |
-
1917
- 1917-01-27 US US145018A patent/US1395685A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3038842A (en) * | 1958-01-08 | 1962-06-12 | Electro Chimie Metal | Process of making sodium perborate by electrolysis |
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