摘要:
Ruthenium-cobalt carbonyl catalysts which have been promoted with an organophosphite effectively catalyze the dealkoxyhydroxymethylation of aldehyde acetals to form glycol monoethers. Methylal, for example, may be reacted with syngas, i.e., CO and H.sub.2, in the presence of this phosphite-promoted ruthenium carbonyl cobalt catalyst to form the monomethyl ether of ethylene glycol. In a like manner acetaldehyde may be converted to the corresponding propylene glycol monoether. The process may advantageously be carried out with high yields and selectivities in the presence of a polar or non-polar organic solvent in combination with the catalyst system of this invention.The invention is also directed to certain of the organophosphite-promoted cobalt and ruthenium-cobalt carbonyl catalyst systems per se.
摘要:
The cobalt carbonyl catalyst R.sup.5 CCo.sub.3 (CO).sub.9, desirably with Ru.sub.3 (CO).sub.12, wherein R.sup.5 is hydrogen; alkyl, preferably C.sub.1-5 lower alkyl; cycloalkyl or substituted cycloalkyl; cycloalkenyl, such as cyclohexenyl or cyclooctenyl; C.sub.1-12 alkoxy, such as methoxy or propoxy; aryl or alkyl-, cycloalkyl-, alkoxy-, halo-, or cyano-substituted aryl; cyano; or a silyl carbyne moiety of the formula R.sub.3.sup.6 Si, wherein R.sup.6 is alkyl or aryl, effectively catalyzes the dealkoxyhydroxymethylation of aldehyde acetals to form glycol monoethers. Methylal, for example, may be reacted with syngas; i.e., CO and H.sub.2, in the presence of this catalyst system to form the corresponding ethylene glycol monomethyl ether.
摘要:
Propylene is oxidized directly to allyl acetate in the presence of acetic acid with air or oxygen in the liquid phase under moderate reaction conditions employing a palladium-on-carbon catalyst which has been pre-treated by activating it with propylene at temperatures of greater than about 50.degree. C., preferably from 60.degree. to 150.degree. C., for a period of time sufficient to form a small but perceptible quantity of said activated catalyst, preferably for at least 10 minutes in the substantial absence of oxygen.
摘要:
C.sub.4 olefins comprising cis- and trans-butane-2 and butene-1 may be oxidized to their corresponding mono- and diacetates in the presence of acetic acid and an olefin-activated palladium catalyst under mild conditions. With this catalyst, and depending in part upon the solvent employed, as well as other operating conditions, the formation of linear allylic 1-acetates over the corresponding branched compounds can be favored in order to increase the yield of the corresponding linear 1,4-diacetates. The latter, in turn, may then be converted, for example, to butanediol by known hydrogenation methods.In a similar manner, isobutylene may be converted to a dialcohol.
摘要:
Acetoxyacetophenone is the predominant product when phenyl acetate, acetic acid and acetic anhydride are reacted in the presence of palladium and a gas mixture containing an inert gas and more than 13 vol. % oxygen. Secondary products are hydroxyacetophenone and phenylene diacetates. The meta isomers predominate when a metal acetate is present in the reaction mixture. Mineral acids cause shift to ortho isomers.
摘要:
A process for converting Udex raffinate to a high octane fuel component by mild, liquid phase oxidation to a product of moderate to low acidity, distilling off a neutral oxidate, esterifying the acidic residue to a neutral product and combining the neutral oxidate and the esterified portion.
摘要:
Norbornadiene and nobornene are catalytically codimerized to the saturated exo-exo hexacyclic dimer of norbornadiene. Used is a three-component homogeneous catalytic system consisting of cobaltic or cobaltous acetylacetonate, 1,2-bisdiphenylphosphino ethane and an alkyl aluminum chloride. Resulting dimer can be used as a component of high energy fuel.
摘要:
Catalytic codimerization of norbornadiene and 1,3-pentadiene yields an olefinic codimer which, after hydrogenation, has utility as a high energy missile fuel or a diluent for a higher viscous missile fuel. Used is a three-component homogeneous catalytic system, consisting of cobaltic or cobaltous acetylacetonate, 1,2-bisdiphenylphosphina ethane and an alkyl aluminum chloride.
摘要:
Geometrical isomerization of cyclic epoxy alcohols such as cis- or trans-1,2-epoxy-3-hydroxycyclohexane may be equlibrated by the use of soluble transition metal complexes having the formulaLxM.sup.n Xywherein L is a neutral ligand such as a phosphine, arsine, stibine, amine, olefin, diene, CO or the like, x is an integer of from 0-6 but when x is 2 or more L may be the same or different; M is a Group VIII metal; n is an integer of from 0-3 and denotes the valence state of the metal; X is an anionic ligand such as hydrogen, chloride, bromide, iodide, lower alkyl, trichlorostanato, cyano or the like; y is an integer of from 0-3 which is equal to n but when y is 2 or 3, X may be the same or different. When n is 0, then x equals at least 1, but when either x or y is 0, then the other integer must be at least 1.
摘要:
Processes for preparing vinyl nortricyclane (I) and its hydrogenated derivative, ethyl nortricyclane (II) are disclosed. The nortricyclane (II) can be used as a high energy fuel or a fuel diluent. Process involves codimerization of norbornadiene and ethylene in the presence of a homogeneous catalytic system of cobaltic or cobaltous acetylacetonate, 1,2-bisdiphenylphosphino ethane and an alkyl aluminum chloride to yield the vinyl nortricyclane (I). The latter can be hydrogenated to ethylnortricyclane.