GB799378A - Method of preparing attrition resistant alumina particles - Google Patents

Method of preparing attrition resistant alumina particles

Info

Publication number
GB799378A
GB799378A GB36783/55A GB3678355A GB799378A GB 799378 A GB799378 A GB 799378A GB 36783/55 A GB36783/55 A GB 36783/55A GB 3678355 A GB3678355 A GB 3678355A GB 799378 A GB799378 A GB 799378A
Authority
GB
United Kingdom
Prior art keywords
alumina
water
aluminium
heating
impregnated
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
GB36783/55A
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.)
Houdry Process Corp
Original Assignee
Houdry Process Corp
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 Houdry Process Corp filed Critical Houdry Process Corp
Publication of GB799378A publication Critical patent/GB799378A/en
Expired legal-status Critical Current

Links

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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
    • 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
    • B01J21/16—Clays or other mineral silicates
    • 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
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
    • C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
    • C07C5/327—Formation of non-aromatic carbon-to-carbon double bonds only
    • C07C5/333—Catalytic processes
    • C07C5/3332—Catalytic processes with metal oxides or metal sulfides
    • 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
    • B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
    • B01J21/04—Alumina

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Catalysts (AREA)

Abstract

Alumina particles of high attrition resistance and hardness are made by impregnating powdered aluminium trihydrate with an aqueous solution of a water-soluble salt of aluminium and a small amount of a workability agent (e.g. sodium bentonite, agar, potato or corn starch, or methyl cellulose), and working mechanically the resulting readily flowable powder until it forms a plastic dough which contains 8 to 11 per cent of water; then forming the dough into particles and drying at 220 DEG to 300 DEG F. to remove the free water in 10 to 60 mins.; slowly heating up to about 600 DEG F. to form gamma alumina, and finally heating for more than 1 hour at 800 DEG to 1700 DEG F. In the presence of the workability agent, the water added can be reduced to very small quantities, while preserving the property of forming a plastic dough when the impregnated alumina is subjected to mechanical milling. For example, aluminium trihydrate powder is sprayed in a tumbling drum with a small amount of hot concentrated solution of aluminium nitrate or sodium aluminate, whereby about 1.8 parts of potential alumina is added per 100 parts of trihydrate. At the same time 0.3 to 0.7 parts per cent by weight of methyl cellulose are added. The mixture consisting of a flowable powder is then subjected to heavy mechanical pressure for up to 5 hours in a muller, when it assumes a plastic form, which is extruded to form rods and pellets, e.g. 4.75 mm. diameter. These are first dried at about 270 DEG F. in heated air, and then submitted to slow drying raising the temperature at the rate of 35 DEG F. per hour up to 600 DEG F. A final more rapid heating up to 1700 DEG F. is then employed. The product may be impregnated with chromium oxide or a platinum group metal. Platinum, rhodium, palladium, rhodium, and osmium are specified. If desired after the heating stage at 600 DEG F. the pellets may be leached with nitric or acetic acid to remove alkali before the final heating stage. The impregnated catalysts may be used for dehydrogenating or hydroforming reactions. Specification 675,349 is referred to.
GB36783/55A 1954-12-24 1955-12-22 Method of preparing attrition resistant alumina particles Expired GB799378A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US799378XA 1954-12-24 1954-12-24

Publications (1)

Publication Number Publication Date
GB799378A true GB799378A (en) 1958-08-06

Family

ID=22153776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36783/55A Expired GB799378A (en) 1954-12-24 1955-12-22 Method of preparing attrition resistant alumina particles

Country Status (1)

Country Link
GB (1) GB799378A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172255B (en) * 1959-08-12 1964-06-18 Pechiney Prod Chimiques Sa Process for the production of a chromium oxide on aluminum oxide carrier catalyst for the dehydrogenation of aliphatic hydrocarbons
DE1193487B (en) * 1964-03-11 1965-05-26 Basf Ag Process for the production of pelletized, active clay
EP1661618A1 (en) * 1999-05-21 2006-05-31 Sasol Technology (UK) Limited Reducing Fischer-Tropsch catalyst attrition losses in high agitation reaction systems
CN115279863A (en) * 2020-03-11 2022-11-01 蒂罗利特磨料机械斯沃罗夫斯基两合公司 Method for producing abrasive grains

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172255B (en) * 1959-08-12 1964-06-18 Pechiney Prod Chimiques Sa Process for the production of a chromium oxide on aluminum oxide carrier catalyst for the dehydrogenation of aliphatic hydrocarbons
DE1193487B (en) * 1964-03-11 1965-05-26 Basf Ag Process for the production of pelletized, active clay
EP1661618A1 (en) * 1999-05-21 2006-05-31 Sasol Technology (UK) Limited Reducing Fischer-Tropsch catalyst attrition losses in high agitation reaction systems
CN115279863A (en) * 2020-03-11 2022-11-01 蒂罗利特磨料机械斯沃罗夫斯基两合公司 Method for producing abrasive grains

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