SU401395A1 - Method for preparing the catalyst for hydrogening non-limited compounds - Google Patents

Method for preparing the catalyst for hydrogening non-limited compounds

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Publication number
SU401395A1
SU401395A1 SU1624007A SU1624007A SU401395A1 SU 401395 A1 SU401395 A1 SU 401395A1 SU 1624007 A SU1624007 A SU 1624007A SU 1624007 A SU1624007 A SU 1624007A SU 401395 A1 SU401395 A1 SU 401395A1
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SU
USSR - Soviet Union
Prior art keywords
catalyst
transition metal
acetylacetonate
example
iii
Prior art date
Application number
SU1624007A
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Russian (ru)
Original Assignee
Институт органического катализа , электрохимии Казахской ССР
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Priority to SU1624007A priority Critical patent/SU401395A1/en
Application granted granted Critical
Publication of SU401395A1 publication Critical patent/SU401395A1/en

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Description

one

The invention relates to methods for the preparation of catalysts.

A known method for the preparation of a catalyst for the hydrogenation of unsaturated compounds involves the mechanical mixing of a solid support, for example alumina, silica-alumina, with a pre-separated reaction product of a transition metal acetylacetonate, for example cobalt (II), iron (III), nickel (II), with aluminum trimethyl. The resulting catalyst has low stability due to pyrophoricity and low selectivity. The rate of hydrogenation of unsaturated compounds on such a catalyst is 1.0 min-h

In order to obtain a more active, stable and selective catalyst, the carrier method, for example alumina, silica, zeolite, is impregnated with a solution of a transition metal acetylacetonate, for example iron (III), cobalt (1P), chromium (P1), in an organic solvent, for example, in chlorobenzene, toluene or heptane, then precipitated acetylacetonate is treated, not separated from the solution, with triethylaluminum and the catalyst is held for 20 minutes in a stream of argon and 30 minutes in a stream of hydrogen.

Medium and transition acetylacetate

metal can yell in a weight ratio of 2-3: 1.

The molar ratio between the non-transitional acetylacetonate and aluminum triethyl can be varied within 1: 3-6.

To prepare a catalyst, 50-160 ml of an organic solvent (per 1 g of metal acetylacetonate) is required.

The catalyst obtained by the proposed method has a high activity in the reactions of hydrogenation of compounds that contain, nx, double and triple bonds (the rate of hydrogenation is 2.8-11.1). The hydrogenation reaction of acetylenic compounds is not accompanied by trimerization, characteristic of catalysts of this type, since the catalyst has a high selectivity. The catalyst is highly stable and can be used shortly without loss of catalytic activity.

Example 1. 0.2 g of AO3, 10 ml of toluene and 5 ml of a toluene solution of Co (Acac) are introduced into a duck blown with argon: i (0.27 mmol), shake the mixture at 20 ° C on a rocking chair for 15 min. and then 1 ml of a toluene solution of A1 (C2H5) 3 (1.04 mol) is added to it. The resulting catalyst was kept for 20 minutes with a stream of argon and 30 minutes in a stream of hydrogen, and 9.0 mmol of phenylacetylene were introduced and hydrogenated. Full hydrogenation time

(100%) 12 min, which corresponds to the reaction rate of 5.6 mol of phenylacetylene / mol of catalyst / min (5.6). According to the chromatography data in the catalyst, there is no product of the trimerization of phenylacetylene - triphenylbenzene.

Example 2. 0.3 g of zeolite NaX, 15 ml of chlorobenzene and 0.1 g of Pe (Acac) 3 (0.27 mmol) are introduced into the duck blown with argonum, shaken for 15 minutes at 20 ° C, and then 1 , 62 mmol A1 (C2H5) h. The resulting catalyst was incubated for 20 minutes in a stream of argon and 30 minutes in a stream of hydrogen, after which 9.0 mol of gentin-1 was introduced and hydrogenated. The total hydrogenation time of the triple and double bond formation (100%) is 8 minutes.

Example 3. Analogously to example 1, a catalyst was prepared from 0.2 g of SiO2, 0.1 g (0.27 mmol) of Co (Acac) s, 0.81 mmol of A1 (C2H5) s, and 15 ml of heptane. 9.0 mmol of styrene is hydrogenated. Full hydration time 3 min. Reaction rate of 11.1 minutes

Example 4. Analogously to Example 1, a catalyst was prepared from 0.4 g of NaX zeolite, 0.2 g (0.54 mmol) of Cg (Acac) h, 1.62 mmol of A1 (C4H9) C and 15 ml of heptane. 9.0 mmol of heptene-1 is hydrogenated. Heptep-1 hydrogenation time at 90% 2 min (reaction rate 8.3); the remaining 10% is hydrogenated more slowly in 4 minutes. The final hydrogenation product is n-heptane. Total speed 2.8 min-

Example 5. The catalyst of Example 2 is prepared and the hydrogenation of 15 portions of styrene (9 mmol each) is carried out sequentially. The time of hydrogenation of the first portion is 3-4 minutes, and the last - 3 minutes, i.e., the catalyst activity does not decrease.

Subject invention

Claims (3)

1. A method for preparing a catalyst for hydrogenating unsaturated compounds by reacting transition metal acetylacetonates with trialkyl aluminum in the presence of a carrier, characterized in that, in order to obtain a more active, stable and selective catalyst, a carrier, such as alumina, silica or zeolite, is impregnated with an acetylacetonate solution a transition metal, for example iron (III), cobalt (III) or chromium (III), in an organic solvent, for example in chlorobenzene, toluene or heptane, then processing Precipitated acetylacetonate is triethylaluminum and the resulting product is kept in a stream of argon and hydrogen.
2. A method according to claim 1, characterized in that the carrier of the transition metal acetylacetonate is taken in a weight ratio of 2-3: 1.
3. A method according to claim 1, characterized in that the transition metal acetylacetonate n triethyl aluminum is taken in a molar ratio of 1: 3-6.
SU1624007A 1971-03-01 1971-03-01 Method for preparing the catalyst for hydrogening non-limited compounds SU401395A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1624007A SU401395A1 (en) 1971-03-01 1971-03-01 Method for preparing the catalyst for hydrogening non-limited compounds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1624007A SU401395A1 (en) 1971-03-01 1971-03-01 Method for preparing the catalyst for hydrogening non-limited compounds

Publications (1)

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SU401395A1 true SU401395A1 (en) 1973-10-12

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4431574A (en) * 1981-05-05 1984-02-14 Institut Francais Du Petrole Supported group VIII noble metal catalyst and process for making it

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4431574A (en) * 1981-05-05 1984-02-14 Institut Francais Du Petrole Supported group VIII noble metal catalyst and process for making it

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