摘要:
A class of bridged or unbridged metallocene compounds is disclosed, wherein the cyclopentadienyl ligands have two or four adjacent substituents forming one or two alkylenic cycles of from 4 to 8 carbon atoms. These metallocenes are useful as catalyst components for the polymerization of olefins, particularly for the (co)polymerization of ethylene and for the polymerization of propylene.
摘要:
Disclosed is a process for the preparation of aryl-substituted propionic acid esters having the formula: ##STR1## wherein R and R.sup.1 are a C.sub.1 -C.sub.12 linear or branched alkyl, a C.sub.5 -C.sub.12 cycloalkyl, a C.sub.6 -C.sub.12 aryl or a C.sub.7 -C.sub.12 alkaryl or aralkyl, R.sup.2 is hydrogen or a C.sub.1 -C.sub.20 linear or branched alkyl and R.sup.3 is a C.sub.1 -C.sub.20 linear or branched alkyl, a C.sub.5 -C.sub.12 cycloalkyl, a C.sub.6 -C.sub.12 aryl or a C.sub.7 -C.sub.20 alkaryl or aralkyl, and may be the same or different, or R.sup.1 is hydrogen, which comprises forming a reaction mixture of a phenol, at least one base catalyst and an acrylate, in the presence of 1,2-dimethoxybenzene, wherein the acrylate is added at once or over a period of time from 5 to 60 minutes at atmospheric pressure. The process results in excellent yields of the desired product with good rates of conversion.
摘要:
A platform executing on a computer system configures an application and components that provide capabilities to the application based on an application descriptor of the application, the application and the components to be run on a plurality of nodes of the platform that are arranged in a cluster. The platform assigns a first set of the components to run on a first node of the plurality of nodes and a second set of on the components to run on a second node of the plurality of nodes. The platform installs the first set of the components on the first node and the second set of the components on the second node.
摘要:
The present invention includes methods for producing and purifying esters of polyunsaturated fatty acids that include reacting a composition having triglycerides with polyunsaturated fatty acid residues in the presence of an alcohol and a base to produce an ester of a polyunsaturated fatty acid from the triglycerides. The composition can be a polyunsaturated fatty acid-containing composition that has not been conventionally processed. The reacted composition can be further processed by distillation.
摘要:
A class of bridged or unbridged metallocene compounds is disclosed, wherein the cyclopentadienyl ligands have two or four adjacent substituents forming one or two alkylenic cycles of from 4 to 8 carbon atoms.These metallocenes are useful as catalyst components for the polymerization of olefins, particularly for the (co)polymerization of ethylene and for the polymerization of propylene.
摘要:
Disclosed is a process for the preparation of organic esters and amides by reacting (a) a 5 to 60 mole % excess of an ester of (substituted-4-hydroxyphenyl) alkanoic acid with (b) (i) a C.sub.4 -C.sub.20 aliphatic alcohol or thioether alcohol having one or more hydroxyl groups or (ii) an amine of the formula, (R"').sub.2 N(CH.sub.2).sub.n R"" wherein R"' is hydrogen, C.sub.1-7 alkyl, C.sub.5-12 cycloalkyl, or C.sub.6-12 aryl, provided that one R"' is hydrogen, and R"" is hydrogen or N(R"').sub.2 wherein R"' is a defined above, in the presence of a catalyst system comprising a basic inorganic compound and a polar aprotic organic compound. The process provides higher yields of the desired product, shorter reaction times, and reduces the production of undesirable side-products.
摘要:
Upon receiving application code and an application descriptor of an application, a platform executing on a computer system identifies a capability to be used by the application based on the application descriptor. The platform determines a component that provides the capability based on a component descriptor of the component. The platform then configures the application and the component for execution on the platform.
摘要:
A platform executing on a computer system configures an application and components that provide capabilities to the application based on an application descriptor of the application, the application and the components to be run on a plurality of nodes of the platform that are arranged in a cluster. The platform assigns a first set of the components to run on a first node of the plurality of nodes and a second set of on the components to run on a second node of the plurality of nodes. The platform installs the first set of the components on the first node and the second set of the components on the second node.
摘要:
A computing device detects an event generated by a first component that publishes a connection endpoint, the event indicating that the connection endpoint of the first component has been modified. The computing device determines a second component that subscribes to the connection endpoint. The computing device updates a location of the connection endpoint in a data structure associated with the second component to maintain a connection between the first component and the second component.
摘要:
Upon receiving application code and an application descriptor of an application, a platform executing on a computer system identifies a capability to be used by the application based on the application descriptor. The platform determines a component that provides the capability based on a component descriptor of the component. The platform then configures the application and the component for execution on the platform.