摘要:
A process for producing a chlorohydrin, an ester of a chlorohydrin, or a mixture thereof including the steps of contacting, in a hydrochlorination reactor, a multihydroxylated aliphatic hydrocarbon, an ester of a multihydroxylated aliphatic hydrocarbon, or a mixture thereof with a source of a hydrogen chloride, in the presence of a hydrophobic or extractable carboxylic acid catalyst is provided.
摘要:
The present invention provides isothermal multitube reactors suitable for the production of chlorinated and/or fluorinated propene and higher alkenes from the reaction of chlorinated and/or fluorinated alkanes and chlorinated and/or fluorinated alkenes. The reactors utilize a feed mixture inlet temperature at least 20° C. different from a desired reaction temperature.
摘要:
Extruded polymer foams are prepared using brominated fatty acids, an ester, amide or ester-amide of a brominated fatty acid, a glyceride of one or more brominated fatty acids, or a polymerized brominated fatty acid as an FR additive. The brominated FR additives unexpectedly are stable at the extrusion temperatures, and provide excellent flame retardancy to the foams.
摘要:
The present invention relates to a process for converting a multihydroxylated-aliphatic hydrocarbon or ester thereof to a chlorohydrin, by contacting the multihydroxylated-aliphatic hydrocarbon or ester thereof starting material with a source of hydrogen chloride at superatmospheric, atmospheric and subatmospheric pressure conditions for a sufficient time and at a sufficient temperature, preferably wherein such contracting step is carried out without substantial removal of water, to produce the desired chlorohydrin product; wherein the desired product or products can be made in high yield without substantial formation of undesired overchlorinated byproducts; said process carried out without a step undertaken to specifically remove volatile chlorinated hydrocarbon by-products or chloroacetone, wherein the combined concentration of volatile chlorinated hydrocarbon by-products and chloroacetone is less than 2000 ppm throughout any stage of the said process.
摘要:
A catalyst activator particularly adapted for use in the activation of metal complexes of metals of Group 3-10 for polymerization of ethylenically unsaturated polymerizable monomers, especially olefins, comprising: a compound corresponding to the formula: ArfzAl2Q16-z where; Q1 independently each occurrence is selected from C1-20 alkyl; Arf is a fluorinated aromatic hydrocarbyl moiety of from 6 to 30 carbon atoms; z is a number greater than 0 and less than 6, and the moiety: ArfzAl2Q16-z is an adduct of tri(fluoroarylaluminum) with from a sub-stoichiometric to a super-stoichiometric amount of a trialkylaluminum having from 1 to 20 carbons in each alkyl group.
摘要:
A group of functionalized polyaminocarboxylate chelants that form complexes with rare earth-type metal ions are disclosed. The complexes, covalently attached to an antibody or antibody fragment, can be used for therapeutic and/or diagnostic purposes.
摘要:
A group of functionalized polyamine chelants that form complexes with rhodium are disclosed. The rhodium complexes can be attached to an antibody or antibody fragment and used for therapeutic or diagnostic purposes.
摘要:
The invention relates to a novel process to prepare selectively mono-N-alkylated polyazamacrocycles which requires an electrophile with between about one and five equivalents of a suitable macrocycle in a solvent which will not promote a proton transfer.
摘要:
A group of functionalized polyamine chelants that form complexes with radioactive rhodium are disclosed. The rhodium complexes can be attached to an antibody or antibody fragment and used for therapeutic or diagnostic purposes.
摘要:
The invention is a process for the preparation of a carbon dioxide oxirane copolymer wherein the process comprises contacting carbon dioxide with an oxirane in the presence of (1) an organic coordination compound and (2) a catalytic amount of a double metal cyanide complex under conditions such that an oxirane carbon dioxide copolymer is prepared.