CH294682A - Process for the production of mixtures of aluminum hydroxide and zirconium hydroxide. - Google Patents
Process for the production of mixtures of aluminum hydroxide and zirconium hydroxide.Info
- Publication number
- CH294682A CH294682A CH294682DA CH294682A CH 294682 A CH294682 A CH 294682A CH 294682D A CH294682D A CH 294682DA CH 294682 A CH294682 A CH 294682A
- Authority
- CH
- Switzerland
- Prior art keywords
- zirconium
- mixtures
- hydroxide
- production
- aluminum
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 6
- 239000000203 mixture Substances 0.000 title claims description 4
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- IVORCBKUUYGUOL-UHFFFAOYSA-N 1-ethynyl-2,4-dimethoxybenzene Chemical compound COC1=CC=C(C#C)C(OC)=C1 IVORCBKUUYGUOL-UHFFFAOYSA-N 0.000 title description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 title description 2
- 239000003513 alkali Substances 0.000 claims description 5
- 239000012266 salt solution Substances 0.000 claims description 4
- 150000003754 zirconium Chemical class 0.000 claims description 4
- 150000004645 aluminates Chemical class 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910001093 Zr alloy Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- ZSFZQNSWHYVSDP-UHFFFAOYSA-G dialuminum;sodium;heptachloride Chemical compound [Na+].[Al+3].[Al+3].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-] ZSFZQNSWHYVSDP-UHFFFAOYSA-G 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 206010016256 fatigue Diseases 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000000320 mechanical mixture Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- CMOAHYOGLLEOGO-UHFFFAOYSA-N oxozirconium;dihydrochloride Chemical compound Cl.Cl.[Zr]=O CMOAHYOGLLEOGO-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 238000001935 peptisation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/066—Zirconium or hafnium; Oxides or hydroxides thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/14—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of germanium, tin or lead
-
- 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
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/16—Preparation of alkaline-earth metal aluminates or magnesium aluminates; Aluminium oxide or hydroxide therefrom
- C01F7/164—Calcium aluminates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G19/00—Compounds of tin
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/003—Titanates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G25/00—Compounds of zirconium
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G25/00—Compounds of zirconium
- C01G25/02—Oxides
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/07—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof
- D06M11/11—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with halogens; with halogen acids or salts thereof; with oxides or oxyacids of halogens or salts thereof with halogen acids or salts thereof
- D06M11/20—Halides of elements of Groups 4 or 14 of the Periodic Table, e.g. zirconyl chloride
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/45—Oxides or hydroxides of elements of Groups 3 or 13 of the Periodic Table; Aluminates
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/10—Repellency against liquids
- D06M2200/12—Hydrophobic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Geology (AREA)
- Textile Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Catalysts (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Description
<Desc/Clms Page number 1>
Verfahren zur Herstellung von Gemischen von Aluniiniumhydroxyd und Zirkonhydroxyd. Es wurde gefunden, dass sich in einfacher Weise (x' eniisclie von -'#lumininmh#-drox:
#d und Zirkonliydroxv < 1 herstellen lassen, wenn man auf wässerige Zirkonsalzlösung Alka.li- alumina.t, zweckmässig bei einem pH-Wert von etwa 6-7, einwirken lässt, Die dabei entste- lienden Niederschläge lassen sieh nach Aus- waschen, schonendem Trocknen und Peptisie- ren zu beständigen Miselisolen lösen, die sich zum Imprägnieren von Faserstoffen sehr gut eignen,
während man durch Peptisation meclianiseher Mischungen der für sich hergestellten Hydroxyde oder durch Versnischen der Einzelsole nur zu ungenügend beständigen Solen gelangt und bei der Fällung einer gemeinsamen Aluminium- und Zirkonsa.lz- lösuiig- mit Alkali leicht. die eine oder die andere Komponente in nicht peptisierbarer Form ausfällt. Bei stärkerem Erhitzen der nach dem neuen Verfahren gewonnenen, ausgewaschenen Niederschläge entstehen wasser- usilösliclie aktive -Massen, die sieh als Mischkatalysatoren oder Katalysatorträger verwenden lassen.
Das Verfahren kann in der Weise ausgeführt werden, dass man eine Alkalialuminat- lösung in die Zirkonsalzlösun,#- unter krä.f- tigein Rühren einfliessen lässt, bis die Flüssigkeit einen pH-Wert von etwa 5,5-7 erreicht hat. Zweelimässiger ist es, in vorgelegtes Wasser unter Rühren gleichzeitig entsprechende .Mengen Aluminat- und Zirkonsalzlösung ein- laufen zu lassen, wobei man sich zur L'ber- waehung des PH-Wertes vorteilhaft einer Antimonelektrode bedient.
Das Mengenverhältnis zwischen Aluminium und Zirkon im Niederschlag lässt sieh durch Anwendung von Oxysalzen oder durch Anwendung einer Alinninatlösung mit überschüssigem Alkali beeinflussen. Vorzugsweise wählt man Salze finit solchen Anionen, die sich leicht- aus dem Niederschlag auswaschen lassen und aus der Flüssigkeit in verwertbarer Form, z. B. als Alkalinitrat oder -sulfat, wiedergewonnen und weiter verwendet werden können.
Es empfiehlt. sich, den von der Flüssigkeit getrennten Niederschlag so lange zu waschen, bis die bei der Fällung entstandenen Alkalisalze weitgehend entfernt sind, wobei durch Anwendung eines entsprechend angesäuerten Waschwassers der pH--Vert des Niederschlags zweckmässig zwischen 3,5 und 5 gehalten wird.
Die so erhaltene Masse wird dann schonend, im allgemeinen bei etwa. 70-90 , getrocknet, bis der Glührückstand des Trockengutes zwi- schen 50 und 70 % liegt. Die Masse wird hier- auf fein gemahlen und in Wasser zu einer Aufschlämmung mit einem PH-Wert von etwa 6,5-7 angerührt.
Nach .dem Abtrennen der Flüssigkeit und Waschen bis zur Salzfreiheit. wird nochmals bei etwa 7a-90 bis zu einem Glührückstand von 60-70 % getrocknet. Das so erhaltene Erzeugnis kann dann durch Peptisation mit geringen Mengen Säuren oder
<Desc/Clms Page number 2>
EMI2.1
peptisierenden Salzen, wie Aluminiumnitrat oder Zirkonoxy-clilorid, in.
Sole übergeführt werden, die im Liter 150-170- stand enthalten können. hc-tspiel: In ein Rührgefäl ), in dem sie 1l 10 Liter Wasser befinden, lässt inall gleichzeitig 15 Liter Zirkonox\ chlorid:lösung vom spezifischen Gewicht 1,24 und 10 Liter Natriumaluniina.tlös,uing vom spezifischen Gewicht 1,32 einfliessen, wobei man dafür sorgt, dass der pH-Wert in der Mischung 6-7 beträgt, Der entstandene -Niederschlag wird von der Flüssigkeit getrennt, mit Waschwasser vom pH-Wert 5 gewaschen, bei 80-90 getrocknet und fein gemahlen. Die Masse wird in Wasser aufgeschlämmt, auf den p11-Wert 6,5 eingestellt, nach längerem Digerieren abgesaugt und mit Wasser bis zur Chlorfreiheit gewaschen. Naeli dem Trocknen bei 70 wird die
EMI2.2
Masse, die dann einen p11-Wert von 5,:5 und einen Glührückstand voll etwa 62 %o aufweist, mit Salpetersäure peptisiert.
Das Peptisat lässt sieh, ohne weiteres oder ancli naeh Trockneli in) Dampi.'sehranh, zu einen) i)eställ.cligel) Sol voll 1'_'0-1 30 g (@lührüdatan @a ;je Liter auflösen, das 711111 @Vas"ei>clielitiiiacllen, z. B. voll Zeltbalinst.offen, vorzüglich geeignet ist.
<Desc / Clms Page number 1>
Process for the production of mixtures of aluminum hydroxide and zirconium hydroxide. It was found that in a simple way (x 'eniisclie from -' # lumininmh # -drox:
Allow #d and zirconium hydroxv <1 to be produced, if one allows to act on the aqueous zirconium salt solution Alka.li- alumina.t, expediently at a pH value of about 6-7. The precipitates that are formed can be seen after washing gentle drying and peptizing to form permanent miselisols, which are very suitable for impregnating fibers,
whereas peptization of mechanical mixtures of the hydroxides prepared for themselves or mixing of the individual sols yields only inadequately stable sols, and the precipitation of a common aluminum and zirconium alloys easily with alkali. one or the other component precipitates in a non-peptizable form. When the washed-out precipitates obtained by the new process are heated to a higher degree, water-soluble active masses are formed which can be used as mixed catalysts or catalyst carriers.
The process can be carried out in such a way that an alkali aluminate solution is allowed to flow into the zirconium salt solution, while stirring vigorously, until the liquid has a pH of about 5.5-7. It is more ambiguous to simultaneously run corresponding amounts of aluminate and zirconium salt solution into the water initially charged while stirring, whereby an antimony electrode is advantageously used to monitor the pH.
The quantity ratio between aluminum and zirconium in the precipitate can be influenced by using oxy salts or by using an alinninate solution with excess alkali. Preference is given to choosing salts finite anions that can be easily washed out of the precipitate and removed from the liquid in usable form, e.g. B. as alkali nitrate or sulfate, can be recovered and reused.
It recommends. to wash the precipitate separated from the liquid until the alkali salts formed during the precipitation are largely removed, the pH of the precipitate being suitably kept between 3.5 and 5 by using an appropriately acidified wash water.
The mass thus obtained is then gentle, generally at about. 70-90, dried until the residue on ignition of the dry material is between 50 and 70%. The mass is then finely ground and mixed in water to form a slurry with a pH of about 6.5-7.
After separating the liquid and washing until salt-free. is dried again at about 7a-90 to an ignition residue of 60-70%. The product obtained in this way can then be peptized with small amounts of acids or
<Desc / Clms Page number 2>
EMI2.1
peptizing salts such as aluminum nitrate or zirconium oxychloride in.
Brine are transferred, which can contain 150-170 liters per liter. hc-tspiel: In a mixing vessel in which you are 1l 10 liters of water, 15 liters of zirconium oxide: solution with a specific gravity of 1.24 and 10 liters of sodium aluminum chloride solution with a specific gravity of 1.32 flow in It is ensured that the pH value in the mixture is 6-7. The precipitate formed is separated from the liquid, washed with washing water with a pH value of 5, dried at 80-90 and finely ground. The mass is slurried in water, adjusted to the p11 value 6.5, filtered off with suction after prolonged digestion and washed with water until it is free of chlorine. Naeli drying at 70 will die
EMI2.2
The mass, which then has a p11 value of 5.5: 5 and an ignition residue of about 62% o, is peptized with nitric acid.
The peptisate lets you see, without further ado or after drying in) Dampi.'sehranh, to a) i) eställ.cligel) sol full 1 '_' 0-1 30 g (@ lührüdatan @a; per liter, the 711111 @Vas "ei> clielitiiiacllen, e.g. fully open tent material, is excellently suited.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE294682X | 1943-08-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH294682A true CH294682A (en) | 1953-11-30 |
Family
ID=6086480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH294682D CH294682A (en) | 1943-08-20 | 1944-08-04 | Process for the production of mixtures of aluminum hydroxide and zirconium hydroxide. |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE457262A (en) |
CH (1) | CH294682A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117586006A (en) * | 2023-11-29 | 2024-02-23 | 重庆任丙科技有限公司 | Method and device for producing composite ceramic powder by high-purity Bayer process mother liquor |
-
0
- BE BE457262D patent/BE457262A/xx unknown
-
1944
- 1944-08-04 CH CH294682D patent/CH294682A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117586006A (en) * | 2023-11-29 | 2024-02-23 | 重庆任丙科技有限公司 | Method and device for producing composite ceramic powder by high-purity Bayer process mother liquor |
Also Published As
Publication number | Publication date |
---|---|
BE457262A (en) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE1806760A1 (en) | Process and apparatus for the continuous production of soap | |
CH294682A (en) | Process for the production of mixtures of aluminum hydroxide and zirconium hydroxide. | |
DE852985C (en) | Process for the production of mixtures containing aluminum hydroxide | |
DE905418C (en) | Process for the production of casein threads or fibers | |
DE863187C (en) | Process for the production of calcium oxide-containing iron catalysts for the hydrogenation of carbons | |
DE400131C (en) | Process for washing and cleaning textiles and other laundry items | |
DE859608C (en) | Process for the production of soluble mixed hydroxides of aluminum and zirconium | |
AT133520B (en) | Process for the production of soaps against textile pests and their application. | |
DE609605C (en) | Process for the production of white color pigments by felling zinc lye | |
DE745340C (en) | Body care products | |
DE717077C (en) | Dispersing titanium pigments | |
DE747490C (en) | Process for improving the spinnability of cellulose hydrate fibers | |
DE302412C (en) | ||
DE1521705A1 (en) | Treatment of aluminum | |
DE854516C (en) | Process for the production of sufficiently pure sulphonic acids | |
DE337406C (en) | Process for the preparation of metal cleaning agents | |
DE766151C (en) | Process for the polymerisation of hydrocarbons | |
DE972724C (en) | Process for the preparation of a silicon oxide-zirconium oxide catalyst suitable for the conversion of hydrocarbon oils | |
DE930998C (en) | Process for the preparation of water-insoluble azo dyes of soft grain | |
AT141163B (en) | Cleaning and cleaning products. | |
DE702889C (en) | Process for purifying carbon tetrachloride | |
DE323708C (en) | Process for the recovery of silver from thin emulsions produced in the manufacture of photographic fabrics | |
DE738908C (en) | Manufacture of protein substances | |
DE620493C (en) | Process for the separation of salt mixtures of alkali nitrate and ammonium chloride obtained by reacting alkali chlorides with ammonium nitrate | |
DE1467282B2 (en) | Process for the production of bayerite |