Title: Process for alkane group dehydrogenation with organometallic catalyst

Abstract

An improved process is described for the catalytic dehydrogenation of organic molecules having a ##STR1## group to produce a ##STR2## group. The organic molecules are: ##STR3## wherein: A.sup.1, A.sup.2, A.sup.3, and A.sup.4 are each independently P, As or N: E.sup.2 is independently C or N; E.sup.3 is independently C, Si or Ge; E.sup.4 is independently C, Si, or Ge; and E.sup.5 is independently C, Si or Ge; M.sup.1, M.sup.2, M.sup.3, and M.sup.4 each is a metal atom independently selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum; Q.sup.1, Q.sup.2, Q.sup.3, and Q.sup.4 are each independently a direct bond, --CH.sub.2 --, --CH.sub.2 CH.sub.2 --, or CH.dbd.CH--; in structure I, structure II or structure IV, R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each independently selected from alkyl, alkenyl, cycloalkyl, and aryl, or R.sup.1 and R.sup.2 together and R.sup.3 and R.sup.4 together form a ring structure having from 4 to 10 carbon atoms, or in structure III, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 are each independently selected from alkyl, alkenyl, cycloalkyl, and aryl, or R.sup.5 and R.sup.6 together and R.sup.7 and R.sup.8 together form a ring structure having from 4 to 10 carbon atoms, at a temperature of between about 100.degree.more » and 250.degree. C. for between about 1 hr and 300 days in the absence of N.sub.2. The surprisingly stable catalyst is a complex of an organic ligand comprising H, C, Si, N, P atoms, and a platinum group metal. The dehydrogenation is performed between about 100 to 200.degree. C., and has increased turnover. « less

Inventors:

Kaska, William C ^[1]; Jensen, Craig M ^[2]

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1. Goleta, CA
2. Kailua, HI

Issue Date:

1998-07-14

Research Org.:

Univ. of Hawaii, Honolulu, HI (United States)

OSTI Identifier:

871704

Patent Number(s):

5780701

Assignee:

Regents of University of California (Oakland, CA); University of Hawaii (Honolulu, HI)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07B - GENERAL METHODS OF ORGANIC CHEMISTRY

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J2531/0244 - Pincer-type complexes, i.e. consisting of a tridentate skeleton bound to a metal, e.g. by one to three metal-carbon sigma-bonds
B01J2531/821 - Ruthenium
B01J2531/822 - Rhodium
B01J2531/824 - Palladium
B01J2531/825 - Osmium
B01J2531/827 - Iridium
B01J2531/828 - Platinum
B01J31/18 - containing nitrogen, phosphorus, arsenic or antimony {as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
B01J31/24 - Phosphines {, i.e. phosphorus bonded to only carbon atoms, or to both carbon and hydrogen atoms, including e.g. sp2-hybridised phosphorus compounds such as phosphabenzene, phosphole or anionic phospholide ligands}

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07B - GENERAL METHODS OF ORGANIC CHEMISTRY

C07B35/04 - Dehydrogenation

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07C - ACYCLIC OR CARBOCYCLIC COMPOUNDS

C07C2531/22 - Organic complexes
C07C5/333 - Catalytic processes

C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07F - ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM

C07F15/0033 - {Iridium compounds}
C07F15/0073 - {Rhodium compounds}

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DOE Contract Number:  

FC36-94AL85804

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

process; alkane; dehydrogenation; organometallic; catalyst; improved; described; catalytic; organic; molecules; str1; produce; str2; str3; independently; metal; atom; selected; consisting; ruthenium; rhodium; palladium; osmium; iridium; platinum; direct; bond; -ch; dbd; ch-; structure; ii; alkyl; alkenyl; cycloalkyl; aryl; form; 10; carbon; atoms; iii; temperature; 100; degree; 250; 300; days; absence; surprisingly; stable; complex; ligand; comprising; performed; 200; increased; turnover; stable catalyst; organic molecules; metal atom; independently selected; improved process; carbon atoms; carbon atom; metallic catalyst; organic ligand; organometallic catalyst; organic molecule; ligand comprising; /585/999/