3-(3-aminopropyldisulfanyl)propan-1-amine

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: There was added to the above reaction mixture of the disulfide derivative of sulfonated polystyrene at a temperature of 50° C., 10 ml of a 50% sodium hydroxide solution and 20 grams of sodium sulfide nonahydrate. The resulting heterogeneous mixture was heated at reflux for 3.5 hours. The cooled reation mixture was filtered and the resin was washed with water followed by 1 liter of a 10% sulfuric acid solution. The resulting washed resin was then azeotropically dried with toluene. Based on method of preparation, there was obtained an ion-exchange catalyst consisting of about 20 mole percent of chemically combined sulfonated styrene units having aminopropylmercaptan units covalently attached to sulfur by nitrogen-sulfur linkages and about 80 mole percent of sulfonated styrene units. This ion-exchange resin was found to be an effective condensation catalyst for phenol and acetone to provide for the production of bisphenol-A in accordance with the procedure of Example 1. The resulting heterogeneous mixture was heated at reflux for 3.5 hours The cooled reation mixture was filtered the resin was washed with water The resulting washed resin was then azeotropically dried with toluene Based on method of preparation there was obtained an ion-exchange catalyst

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: There was added to the above reaction mixture of the disulfide derivative of sulfonated polystyrene at a temperature of 50° C., 10 ml of a 50% sodium hydroxide solution and 20 grams of sodium sulfide nonahydrate. The resulting heterogeneous mixture was heated at reflux for 3.5 hours. The cooled reation mixture was filtered and the resin was washed with water followed by 1 liter of a 10% sulfuric acid solution. The resulting washed resin was then azeotropically dried with toluene. Based on method of preparation, there was obtained an ion-exchange catalyst consisting of about 20 mole percent of chemically combined sulfonated styrene units having aminopropylmercaptan units covalently attached to sulfur by nitrogen-sulfur linkages and about 80 mole percent of sulfonated styrene units. This ion-exchange resin was found to be an effective condensation catalyst for phenol and acetone to provide for the production of bisphenol-A in accordance with the procedure of Example 1. The resulting heterogeneous mixture was heated at reflux for 3.5 hours The cooled reation mixture was filtered the resin was washed with water The resulting washed resin was then azeotropically dried with toluene Based on method of preparation there was obtained an ion-exchange catalyst

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: There was added to the above reaction mixture of the disulfide derivative of sulfonated polystyrene at a temperature of 50° C., 10 ml of a 50% sodium hydroxide solution and 20 grams of sodium sulfide nonahydrate. The resulting heterogeneous mixture was heated at reflux for 3.5 hours. The cooled reation mixture was filtered and the resin was washed with water followed by 1 liter of a 10% sulfuric acid solution. The resulting washed resin was then azeotropically dried with toluene. Based on method of preparation, there was obtained an ion-exchange catalyst consisting of about 20 mole percent of chemically combined sulfonated styrene units having aminopropylmercaptan units covalently attached to sulfur by nitrogen-sulfur linkages and about 80 mole percent of sulfonated styrene units. This ion-exchange resin was found to be an effective condensation catalyst for phenol and acetone to provide for the production of bisphenol-A in accordance with the procedure of Example 1. The resulting heterogeneous mixture was heated at reflux for 3.5 hours The cooled reation mixture was filtered the resin was washed with water The resulting washed resin was then azeotropically dried with toluene Based on method of preparation there was obtained an ion-exchange catalyst

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: There was added 2.4 grams of the aminopropyldisulfide dihydrochloride of Example 3 to 200 ml of a 90:10 water-methanol solution containing 2.6 grams of potassium hydroxide and 20 grams of sodium bicarbonate. The resulting solution was allowed to stir at ambient temperatures at 20 minutes. There was added to this solution 20 grams of the chlorosulfonated polystyrene prepared in Example 1 and the resulting mixture was heated at reflux for a period of 4 hours. Based on method of preparation, there was obtained a sulfonated polystyrene having chemically combined styrenesulfone units with aminopropyldisulfide units covalently attached to sulfur by nitrogen-sulfur linkages. the resulting mixture was heated at reflux for a period of 4 hours Based on method of preparation