摘要:
A metallocene having one or two hydrocarbyl groups bonded to a Group 4 metal are produced from a crude impure pasty or non-wet mixture containing at least 50% by weight of a metallocene having two halogen atoms bonded to a Group 4 metal atom, by (a) mixing liquid aromatic hydrocarbon with the crude impure pasty or non-wet mixture; (b) mixing a solution of an organolithium compound in a suitable anhydrous ether or paraffinic hydrocarbon solvent or a mixture thereof, with the mixture from (a) and agitating the resulting mixture so that lithium halide solids are formed; and (c) separating the solids and recovering the resultant liquid portion which is mainly a solution of the metallocene having one or two hydrocarbyl groups bonded to a Group 4 metal. Additional optional steps include (d) replacing the original solvent from the solution from (c) with a liquid paraffinic hydrocarbon diluent to form a slurry of product solids; and (e) recovering the product metallocene solids. Preferred organolithium compounds have the formula, RLI.nLiX, where R is tert-alkyl, aryl, alkaryl, benzyl, or alkyl-substituted benzyl, or most preferably, methyl, and X is Br or I.
摘要:
A mixture is made from (i) a tris(dihydrocarbylamino) phosphoroamidite and/or a hydrohalide thereof, (ii) a strong base (e.g., NaOH) in proportions of about 2.0 to about 4.0 moles of (ii) per mole of (i), and (iii) at least one solvent for the base (e.g., H.sub.2 O). To this mixture is added a hydrocarbyl monohalide (e.g., EtBr) in proportions of about 1.0 to about 3.0 moles per mole of phosphoroamidite used in forming the initial mixture, and the resultant reaction produces tetrakis(dihydrocarbylamino)phosphonium halide. The process enables more efficient production of tetrakis(dihydrocarbylamino)phosphonium halides, and is capable of being effectively used in large scale production facilities while satisfying the economic constraints of commercial operations.
摘要:
Impure tetra(dihydrocarbylamino)phosphonium halide is contacted with a liquid cyclic ether to dissolve the phosphonium halide and leave at least a portion of the impurities comprising at least quaternary ammonium halide or an amidophosphoxide remaining in the solid state. The solids and the liquid phase are separated from each other, an anhydrous non-solvent for the tetra(dihydrocarbylamino)phosphonium halide is mixed with the separated liquid phase to precipitate the tetra(dihydrocarbylamino)phosphonium halide, which is then separated from the liquid phase. The so-treated tetra(dihydrocarbylamino)phosphonium halide is more efficient as a catalyst for halogen exchange reactions than the original untreated tetra(dihydrocarbylamino)phosphonium halide.
摘要:
Cyclopentadienyl manganese tricarbonyl compounds are made by reacting a mixture of 0.25-0.55 moles of manganese acetate and 0.45-0.55 moles of a bis-cyclopentadienyl manganese compound with about 0.5-2.1 moles of an alkyl aluminum compound (e.g. triethyl aluminum) in the presence of about 0.75-1.25 moles of an ether per mole of said alkyl aluminum compound and reacting the mixture with carbon monoxide at about 65.degree.-175.degree. C. and 300-1500 psig.
摘要:
A process for the preparation of organic cation tetrakis(Faryl) borate salts. The process includes preparation of intermediate, mono-hydrazine substituted (Faryl) compound, from (Faryl) compound using hydrazine at temperatures below 78° C. A stoichiometric excess of hydrazine to the (Faryl) compound to the (Faryl) compound is used. The process further includes the preparation of the organic cation tetrakis(Faryl) borate in ethereal medium.
摘要:
Impure tetra(dihydrocarbylamino)phosphonium halide is contacted with a liquid cyclic ether to dissolve the phosphonium halide and leave at least a portion of the impurities comprising at least quaternary ammonium halide or an amidophosphoxide remaining in the solid state. The solids and the liquid phase are separated from each other, an anhydrous non-solvent for the tetra(dihydrocarbylamino)phosphonium halide is mixed with the separated liquid phase to precipitate the tetra(dihydrocarbylamino)phosphonium halide, which is then separated from the liquid phase. The so-treated tetra(dihydrocarbylamino)phosphonium halide is more efficient as a catalyst for halogen exchange reactions than the original untreated tetra(dihydrocarbylamino)phosphonium halide.
摘要:
A 1,3,5-trimethyl-2,4,6-tris(3,5-dialkyl-4-hydroxybenzyl)benzene is prepared in high yield by reacting a 2,6-dialkyl-4-methoxymethylphenol with mesitylene in a hydrocarbon solvent and in the presence of at least about 10 mol %, based on the amount of mesitylene, of a hydrocarbon-soluble acid (e.g., an alkylbenzenesulfonic acid having 12-18 carbons in the alkyl group, a carboxylic acid, or a dialkylsulfosuccinate) as a catalyst or co-catalyst while distilling methanol by-product out of the reaction mixture as it is formed. The process may be conducted so as to provide a substantially pure product or a product, such as 1,3,5-trimethyl-2,4,6-tris(3,5-di-t-butyl-4-hydroxybenzyl)benzene, having fairly high purity (e.g., about 98-98%) and a melting point much lower than would be expected of a product having such high purity.
摘要:
Processes are provided for producing triphenylene by combining at least dodecahydrotriphenylene, a dehydrogenation catalyst such as palladium on carbon, and an aliphatic solvent having a boiling point greater than 180° C. to form a reaction mixture, heating the reaction mixture to at least about 180° C. but lower than the boiling point of the aliphatic solvent, maintaining the temperature of the reaction mixture at 180° C. but lower than the boiling point of the aliphatic solvent, and passing a purge fluid comprising an inert fluid through the reaction mixture, for a period of time adequate for production of triphenylene.
摘要:
Processes are provided for producing triphenylene by combining at least dodecahydrotriphenylene, a dehydrogenation catalyst such as palladium on carbon, and an aliphatic solvent having a boiling point greater than 180° C. to form a reaction mixture, heating the reaction mixture to at least about 180° C. but lower than the boiling point of the aliphatic solvent, maintaining the temperature of the reaction mixture at 180° C. but lower than the boiling point of the aliphatic solvent, and passing a purge fluid comprising an inert fluid through the reaction mixture, for a period of time adequate for production of triphenylene.