Did You Know...
...that the Band-Aid Bandage was invented by a Johnson & Johnson employee whose wife had cut herself? Earl Dickson's wife was rather accident prone, so he set out to develop a bandage that she could apply without help. He placed a small piece of gauze in the center of a small piece of surgical tape, and what we know today as the Band Aid bandage was born!
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| Number | Title | Issue Date |
| 5502016 | Method to treat an ion-exchanger catalyst for the process of bisphenol-A synthesis In the process of bisphenol-A systhesis a method for controlling the water content of the resultant cation-exchanger bed wherein an acid ion-exchanger resin in the form of a sulphonated styrene-divinylbenzene copolymer is washed with phenol and the result... | 03/26/1996 |
| 5198591 | Method to manufacture bisphenol A The invention relates to a process for obtaining a high purity bisphenol from a post-reaction mixture resulting from the step of synthesis of phenol and acetone in the presence of a strong acid cation exhanger catalyst, by the way of crystallation and sep... | 03/30/1993 |
| 4906789 | Methods for bisphenol A production A process for the production of bisphenol A from phenol and acetone, comprises introducing a substantially anhydrous reaction mixture of phenol, acetone, and recycled solution of bisphenol A and reaction by-products in phenol into a reaction zone containi... | 03/06/1990 |
| 4301305 | Continuous process for preparation of dian The dian is prepared by the condensation of phenol with acetone in the presence of acid ion-exchange catalyst of the type of sulfonated co-polymer of styrene and divinylbenzene. The three-stage process is conducted in two reactors packed with a stationary... | 11/17/1981 |
| 4131749 | Method for waste recovery from a process of the production of diphenylolpropane The essence of the invention consists in heating the dian waste in the presence of sodium hypophosphite as a catalyst in amount of 0.01 - 0.5% by weight at a temperature of 150 to 250° C and under reduced pressure in the range of 5 to 50 mm Hg. As a resu... | 12/26/1978 |
