DE527370C - Production of active silica with large pores - Google Patents

Production of active silica with large pores

Info

Publication number
DE527370C
DE527370C DEI30205D DEI0030205D DE527370C DE 527370 C DE527370 C DE 527370C DE I30205 D DEI30205 D DE I30205D DE I0030205 D DEI0030205 D DE I0030205D DE 527370 C DE527370 C DE 527370C
Authority
DE
Germany
Prior art keywords
production
active silica
large pores
jelly
silica
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
Application number
DEI30205D
Other languages
German (de)
Inventor
Dr Adolf Roessler
Dr Fritz Stoewener
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI30205D priority Critical patent/DE527370C/en
Application granted granted Critical
Publication of DE527370C publication Critical patent/DE527370C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/152—Preparation of hydrogels
    • 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
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/103—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate comprising silica
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B33/00—Silicon; Compounds thereof
    • C01B33/113—Silicon oxides; Hydrates thereof
    • C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
    • C01B33/14—Colloidal silica, e.g. dispersions, gels, sols
    • C01B33/152—Preparation of hydrogels
    • C01B33/154—Preparation of hydrogels by acidic treatment of aqueous silicate solutions

Description

Herstellung von weitporiger aktiver Kieselsäure In der Patentschrift 444914 ist die Herstellung von weitporiger aktiver Kieselsäure beschrieben, bei der man einer auf beliebige Weise, zweckmäßig auf dem Wege über ein neutrales oder nahezu neutrales. am besten schwach saures Sol, erzeugten Kieselsäuregallerte vor oder während der Trocknung, jedoch vor beendeter Schrumpfung, durch Zugabe eines Elektrolyten ein PH erteilt, das zwischen 7 und io liegt, wobei man die Erteilung des pH innerhalb der angegebenen Grenzen durch geeignete Einstellung des Waschwassers vornehmen kann und- die Gallerte am besten weitgehend von den bei der Herstellung entstehenden Salzen befreit.Production of wide-pore active silica In the patent 444914 describes the production of active silica with wide pores, at which one can do in any way, expediently by way of a neutral or almost neutral. preferably weakly acidic sol, produced silica jelly or during drying, but before shrinkage is complete, by adding a Electrolytes have a PH that is between 7 and io, which is the grant the pH within the specified limits by suitable adjustment of the washing water can make and- the jelly is best largely from the ones in the manufacture resulting salts freed.

Es wurde gefunden, daß man Gelee mit wertvollen Eigenschaften auch erhalten kann, wenn (las der Kieselsäuregallerte vor beendeter Schrumpfung durch Zugabe eines Elektrolyten, zweckmäßig Ammoniak oder Natronlauge, erteilte pH oberhalb io liegt.It has been found that one can get jellies with valuable properties too can be obtained if (read the silica gel through before it had finished shrinking Addition of an electrolyte, expediently ammonia or sodium hydroxide solution, gave a pH above io lies.

Beispiel Zu einer Mischung von 51 kg konzentrierter Schwefelsäure, 46 kg Eisund 6o 1 Wasser läßt man unter gutem Rühren 550 1 Natronwasserglas vom spezifischen Gewicht 1,164 laufen. Nach dem Erstarren des Sols wird die homogene, klare, harte Gallerte mittels Draht in z. B. würfelförmige Stücke zerlegt und dann gewaschen. Hierbei verwendet man, zweckmäßig nachdem die salzigen Verunreinigungen und die überschüssige Säure weitgehend entfernt sind, eine n /ioo bis nii Ammoniaklösung bzw. n/iooo bis n/io Natronlauge, mit der man den Waschprozeß am besten so lange fortsetzt, bis die Farbe der mit Alizaringelb R bzw. mit Tropäolin O versetzten Gallertstücke gerade nach der alkalischen Seite umschlägt und die Wasserstoffionenkonzentration in der Gallerte also ein PH von etwa ii bzw. 12 besitzt. Hierauf wird die Gallerte durch Trocknen in ein weitporiges Kieselgel übergeführt.Example To a mixture of 51 kg of concentrated sulfuric acid, 46 kg ice and water 6o 1 to Run 550 1 sodium silicate of specific gravity 1.164 with good stirring. After the sol has solidified, the homogeneous, clear, hard jelly is placed in z. B. disassembled cube-shaped pieces and then washed. In this case, it is advisable to use, after the salty impurities and the excess acid have largely been removed, an ½ to ½ ammonia solution or ½ to ½ to 100% sodium hydroxide solution, with which the washing process is best continued until the color of the pieces of jelly mixed with alizarin yellow R or tropaolin O turn over to the alkaline side and the hydrogen ion concentration in the jelly has a pH of about ii or 12, respectively. The jelly is then converted into a wide-pored silica gel by drying.

Claims (1)

PATENTANSPRUCH: Abänderung des Verfahrens gemäß Patent 444 9i4, dadurch gekennzeichnet, daß man der Kieselsäuregallerte vor beendeter Schrumpfung durch Zugabe eines Elektrolyten ein pH erteilt, das oberhalb io liegt. PATENT CLAIM: Modification of the method according to patent 444 9i4, characterized in that the silica gel is given a pH above 10 by adding an electrolyte before the shrinkage has ended.
DEI30205D 1925-12-19 1927-02-03 Production of active silica with large pores Expired DE527370C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI30205D DE527370C (en) 1925-12-19 1927-02-03 Production of active silica with large pores

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE263198X 1925-12-19
DEI30205D DE527370C (en) 1925-12-19 1927-02-03 Production of active silica with large pores

Publications (1)

Publication Number Publication Date
DE527370C true DE527370C (en) 1931-06-17

Family

ID=25770704

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI30205D Expired DE527370C (en) 1925-12-19 1927-02-03 Production of active silica with large pores

Country Status (1)

Country Link
DE (1) DE527370C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1266741B (en) * 1963-06-01 1968-04-25 Mobil Oil Corp Process for the partial dehydration and volume reduction of silica hydrogels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1266741B (en) * 1963-06-01 1968-04-25 Mobil Oil Corp Process for the partial dehydration and volume reduction of silica hydrogels

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