Aluminosilicate carrier for metathesis catalysts

Details Aluminosilicate carrier for metathesis catalysts Aluminosilicate carrier for metathesis catalysts

1997-06-20

1999-03-16

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Fatty compounds having an acid moiety which contains the...

554162, 554161, 502102, 502232, 502240, 502241, 560205, 585502, 585520, 585530, 585533, C07C 5100

Patent

active

058832726

DESCRIPTION:

BRIEF SUMMARY
This application is a 371 of PCT/DE95/01846 filed Dec. 19, 1995.
The invention relates to rhenium oxide catalysts carried on hydrothermally treated aluminium silicates, if required with added boric oxide, tungsten oxide, molybdenum oxide or vanadium oxide for the metathesis of olefins and functionalised olefins.
In industrial technology, the metathesis of olefinic hydrocarbons is used in the production of special olefins, dienes and polyenes and unsaturated polymers. Polymers are made by ring-opening metathetic polymerisation (ROMP). Metathesis reactions can be carried out both energy-efficiently at room temperature and at lower or higher temperatures.
Olefins with functional groups, too, are subject to metathesis reaction, as long as suitable catalysts are used. In this, the metathesis of unsaturated fatty acid methyl esters is especially significant. By the transition-metal-catalysed metathesis of these esters, which in industry are produced by transesterification of natural vegetable oils and animal fats with low alcohols, in particular with methanol in the 100000 t scale, important industrial chemicals for the tenside and plastics sectors as well as for the production of high-grade lubricants and a multitude of chemical-technical intermediary products and fine chemicals can be obtained. The principal significance of the metathesis of unsaturated fatty acid esters for industrial applications has been described in various publications, c.f. for example M. Sibeijn et al.: "Technological and Economical Aspects of the Metathesis of Unsaturated Esters" in Journal of the American Oil Chemists' Society vol 71, issue 6, p. 553 (1994).
As a result of the so-called homometathesis of unsaturated fatty acid esters, long-chain dicarboxylic acid esters are obtained: ##STR1## As a result of the so-called co-metathesis of unsaturated fatty acid esters with olefins according to ##STR2## the lengths of the chains and/or structures of fatty acid esters, depending on the olefin used, are changed. For example, it is possible to transfer unsaturated C.sub.18 fatty acid methyl esters made from rape-, sunflower- or soy oil or from tallow--by way of co-metathesis with petrochemical C.sub.4 - to C.sub.6 -olefins (butenes, pentenes, hexenes)--into medium-chain fatty acid esters of the so-called Laurie-range with chain lengths in particular of 12 to 14.
Esters with such chain lengths have hitherto been obtained in industry from tropical oils (coconut and palm kernel oil); they are used in the manufacture of fatty alcohols for the production of tensides.
Through co-metathesis of unsaturated fatty acid esters with ethylene, terminally unsaturated esters are obtained which can be used for the production of dicarboxylic acids of different chain lengths and of organic intermediate products and fine chemicals of the most varied kind. By co-metathesis of unsaturated fatty acid esters with branched olefins, branched unsaturated fatty acid esters are obtained which are of significance in the production of impregnating agents and special lubricants in technical applications and in cosmetics.
As catalysts for the metathesis reactions, preferably Re.sub.2 O.sub.7 -carrier contacts are used which are activated with metallo-organic compounds such as tin alkyls or lead alkyls of the general formulae SnR.sub.4 or PbR.sub.4. In this, a general catalyst is Re.sub.2 O.sub.7 /.gamma.-Al.sub.2 O.sub.3, activated with stannic alkyls. Apart from .gamma.-Al.sub.2 O.sub.3 as a carrier substance for Re.sub.2 O.sub.7, aluminium silicate carriers are also known from the literature.
In FR-A-2 521 872 the carrier contains preferably only 10 to 30% by volume SiO.sub.2. Here organic lead compounds of the general formula PbR.sub.4 serve as activators. In NL-A-84 03 051 the metathesis is carried out on carrier catalysts rich in SiO.sub.2. In the carrier, the Re.sub.2 O.sub.7 /.gamma.-Al.sub.2 O.sub.3 SiO.sub.2 catalysts contain 65 to 90% by weight SiO.sub.2. Preferably stannic ethyl and stannic butyl are used as activators. In EP-B1-0 444 265, aluminium silicates

REFERENCES:
patent: 5143885 (1992-09-01), Warwel et al.
M. Siebeijn, et al., "Technological and Economical Aspects of the Metathesis of Unsaturated Esters, " JAOCS, vol. 71, No. 6, Jun. 1994, pp. 553-561.
Sibeijn et al., JAOCS, vol. 71, No. 6, pp. 553-561 1994.
Suzuki et al., Chem. abstr. of EP-53399, 1982.

Affiliated with

Also associated with

Rating

Aluminosilicate carrier for metathesis catalysts does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Aluminosilicate carrier for metathesis catalysts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aluminosilicate carrier for metathesis catalysts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-819043