Method for preparing basic aluminum halides and product produced therefrom
AssigneeWestwood Chemical Corporation
InventorRocco Giovanniello
Life of this patent
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Abstract
Polymeric basic aluminum halides having the empirical formula: Al.sub.2 (OH).sub.6-y X.sub.y where X is chlorine, bromine or iodine, y has a numerical value from 0.7 to 3, and whose polymer distribution as characterized by size exclusion chromatography is: (a) 100% of the polymers are found in Bands II, III and IV, and (b) Band III contains at least 25% of the polymer; are obtained by reacting aluminum metal with HX in water at a temperature of about 70.degree. C. to about 100.degree. C., where X is halogen, wherein the concentration of product in solution is about 8 to about 35 wt. %.
Claims42
A process for preparing a basic aluminum halide having the empirical formula:
- Al.sub.2 (OH).sub.6-y X.sub.y .multidot.nH.sub.2 O
- where n has a numerical value of about 0.8 to about 4, X is chlorine, bromine or iodine and y has a numerical value of about 0.7 to about 3, which comprises:
- (a) reacting aluminum metal with a hydrohalogen acid having the formula HX wherein X is chlorine, bromine or iodine at a temperature of about 50.degree. C. to about 100.degree. C., the concentration of the product in the solution being about 8 to about 25% by weight of the solution;
- and
- (b) recovering the basic aluminum compound from the hot solution by spray drying;
- whereby the polymer distribution of the product formed as characterized by size exclusion chromatography is:
- (c) 100% of the polymers are found in Bands II, III and IV, with no part of the product found in Band I;
- and
- (d) Band III contains at least 25% of the polymer.
A basic aluminum halide product having the empirical formula
- Al.sub.2 (OH).sub.6-y X.sub.y .multidot.nH.sub.2 O
- wherein n has a numerical value of about 0.8 to about 4, X is chlorine, bromine or iodine and y has a numerical value of about 0.7 to about 3;
- the product being further characterized in that 100% of the aluminum containing polymers are found in Bands II, III and IV, with no part of the product found in Band I, and Band III contains at least 25% of the polymers.
A process for preparing a basic aluminum halide having the empirical formula:
- Al.sub.2 (OH).sub.6-y X.sub.y .multidot.nH.sub.2 O
- where n has a numerical value of about 0.8 to about 4, X is chlorine, bromine or iodine and y has a numerical value of about 0.7 to about 3;
- which comprises:
- (a) reacting aluminum metal containing a catalyst wherein the catalyst is about 0.02 to about 0.1 wt. % iron or about 0.005 to about 0.03 wt. % copper, with a hydrohalogen acid having the formula HX wherein X is chlorine, bromine or iodine at a temperature of about 50.degree. C. to about 100.degree. C., the concentration of the product in the solution being about 8 to about 25% by weight of the solution;
- and
- (b) recovering the basic aluminum compound from the hot solution by spray drying;
- whereby the polymer distribution of the product formed as characterized by size exclusion chromatography is:
- (c) 100% of the polymers are found in Bonds II, III and IV, with no part of the product found in Band I;
- and
- (d) Band III contains at least 25% of the polymer.
Dependencies are inferred from the claim text.