| Patent Number |
Title Of Patent |
Date Issued |
| 6573393 |
Method for producing L-ascorbic acid |
June 3, 2003 |
| The invention relates to a method for producing L-ascorbic acid from 2-keto-L-gulonic acid or 2,3-4,6-diacetone-2-keto-L-gulonic acid. The reaction is carried out in the presence of water and hydrogen halide and the concentration of the hydrogen halide in water is greater than 37 wt. |
| 5814585 |
Bi(Pb)SrCaCuO superconductors |
September 29, 1998 |
| The invention relates to a spray pyrolytic process for the preparation of multi-element metal oxide powders useful as precursors of high temperature superconductor ceramics. Aerosols of aqueous solutions containing corresponding metal salts admixed in the required stoichiometric prop |
| 5714629 |
Process for the preparation of thioglycolic acid alkyl esters |
February 3, 1998 |
| The invention relates to an improved process for the preparation of thioglycolic acid alkyl esters by heating a reaction mixture which essentially comprises thioglycolic acid, an alcohol and an acid catalyst, the water formed being removed by distillation using a water separator, in |
| 5614472 |
Spray-pyrolysis process of preparing superconductor precursors |
March 25, 1997 |
| The invention relates to a spray pyrolyric process for the preparation of multi-element metal oxide powders useful as precursors of high temperature superconductor ceramics. Aerosols of aqueous solutions containing corresponding metal salts admixed in the required stoichiometric prop |
