摘要:
1,5-Dimethyl-1,5-cyclooctadiene and 1,4-dimethyl-4-vinyl-1-cyclohexene are prepared by contacting isoprene with a catalyst obtained by mixing a nickel compound, a reducing agent capable of reducing the nickel to zerovalent nickel, and a trihydrocarbyl phosphite, arsenite or antimonite wherein at least one of the three hydrocarbyl groups is a substituted hydrocarbyl group CF.sub.3 --(CF.sub.2).sub.n C(H)(R)--, in which n.gtoreq.0 and R is an optionally substituted hydrocarbyl group. Only very small amounts of the undesired 1,6-dimethyl-1,5-cyclooctadiene are formed.
摘要:
A series of mono, bi and tricarbocyclic compounds, most of which have olefinic unsaturation in the ring, which may or may not have substituents thereon. While the bi and tricyclic rings may be unsubstituted, these compounds which have olefinic unsaturation, particularly multiple olefinic unsaturation, are polymerizable and copolymerizable in known polymerization systems. They are particularly good crosslinking agents. These compounds are further useful in the sense that they can be cleaved oxidatively, to corresponding carboxylic acids, aldehydes and/or alcohols which have known utility in the plasticizer and detergent arts. The compounds which do not have olefinic unsaturation can also be oxidatively cleaved to produce oxygenated, e.g., acid, alcohol or aldehyde, compounds having known utility.
摘要:
The present invention provides a process which is adapted for cyclodimerization of 1,3-butadiene to 4-vinylcyclohexene under Diels-Alder conditions in the presence of a large-pore carbon molecular sieve.
摘要:
In a method of producing a dimer with a six-membered ring by contacting a catalyst containing iron compounds and organoaluminum compounds with conjugated dienes, the improvements comprising using a catalyst comprising ferrous or ferric compounds organoaluminum compounds and nitric oxide.
摘要:
Formation of undesirable popcorn polymer on the walls of a reaction vessel during thermal dimerization of butadiene is prevented by coating the walls with a falling film of aqueous sodium nitrite solution.
摘要:
The present invention provides a process which is adapted for cyclodimerization of 1,3-butadiene to 4-vinylcyclohexene-1 under Diels-Alder conditions in the presence of a low acidity form of a large-pore zeolite such as ZSM-20, beta or Y.
摘要翻译:本发明提供了一种适于在Diels-Alder条件下在低酸度形式的大孔沸石如ZSM-20,β或者ZSM-20的β存在下将1,3-丁二烯环化为4-乙烯基环己烯-1的方法 Y.
摘要:
A series of mono, bi and tricarbocyclic compounds, most of which have olefinic unsaturation in the ring, which may or may not have substituents thereon. While the bi and tricyclic rings may be unsubstituted, these compounds which have olefinic unsaturation, particularly multiple olefinic unsaturation, are polymerizable and copolymerizable in known polymerization systems. They are particularly good crosslinking agents. These compounds are further useful in the sense that they can be cleaved oxidatively, to corresponding carboxylic acids, aldehydes and/or alcohols which have known utility in the plasticizer and detergent arts. The compounds which do not have olefinic unsaturation can also be oxidatively cleaved to produce oxygenated, e.g., acid, alcohol or aldehyde, compounds having known utility.
摘要:
A process for producing isoprene trimers by the catalytic oligomerization of isoprene which comprises effecting said oligomerization in the presence of a catalyst system comprising:A. a reducible nickel compound;B. an aluminum compound of the formula:AlR.sub.m (OR').sub.3.sub.-mwherein R and R' respectively represent an alkyl group having from 1 to 10 carbon atoms or an aryl group, and m is an integer of 0 to 3;C. a reaction product of triethyl phosphite and pentaerythritol; andD. a monohydric alcohol having from 2 to 6 carbon atoms.