Methods for preparing an alkylation catalyst, and for ortho-alkylating hydroxyaromatic compounds; and related compositions
AssigneeGeneral Electric Company
InventorsBeth A. Watson, Narsi Devanathan
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Abstract
A method for preparing a solid catalyst composition is described. A magnesium reagent which yields magnesium oxide upon calcination, and which includes reduced levels of chlorides and calcium, is dry-blended with at least one filler. Dry-blending is usually carried out in the absence of a promoter. A method for selectively alkylating at least one hydroxyaromatic compound by using the catalyst is also described. A typical product is 2,6-xylenol. Related processes for preparing polyphenylene ethers are described.
Claims9
A method of preparing a solid catalyst composition, comprising the step of dry-blending at least one filler with a magnesium reagent which yields magnesium oxide upon calcination, thereby forming a blended product, wherein a level of chlorides in the magnesium reagent is less than about 250 ppm, and a level of calcium in the magnesium reagent is less than about 2500 ppm.
A catalyst composition, comprising a magnesium reagent and at least one filler, wherein a level of chlorides in the magnesium reagent is less than about 250 ppm, and a level of calcium in the magnesium reagent is less than about 2500 ppm.
Dependencies are inferred from the claim text.