| 6005122 |
Preparation of .alpha.-tocopherol or .alpha.-tocopheryl acetate by reacting trimethylhydroquinone and phytol or isophytol, with recycling of the zinc halide condensation catalyst |
Kai-Uwe Baldenius, Wulf Kaiser, Bernhard Bockstiegel, Harald Laas, Peter D. Schmitt +1 more |
1999-12-21 |
| 5773635 |
Preparation of polyenecarbonyl compounds having a high content of the all-E isomer, and of their acetals or ketals |
Walter Dobler, Wolfgang Krause, Joachim Paust, Otto Worz, Udo Rheude +8 more |
1998-06-30 |
| 5382732 |
2,5-bis(1,1-dialkoxy-2-propyl)-2,5-dihydrofurans, the preparation thereof and the use thereof for the preparation of carotenoids |
Juergen Frank, Udo Rheude, Joachim Paust, Eckhard Hickmann |
1995-01-17 |
| 5300658 |
2,5-bis(1,1-dialkoxy-2-propyl)-2,5-dihydrofurans, the preparation thereof and the use thereof for the preparation of carotenoids |
Juergen Frank, Udo Rheude, Joachim Paust, Eckhard Hickmann |
1994-04-05 |
| 4843171 |
1,1-dialkoxy-2-methyl-4,4-diacyloxy-2-butenes |
Rolf Fischer |
1989-06-27 |
| 4804786 |
Preparation of 4-monoacetals of 2-methylbut-2-ene-1,4-dial |
Rolf Fischer |
1989-02-14 |
| 4435427 |
Stable injectable .beta.-carotene micellar solutions and their preparation |
Peter P. Hoppe, Joachim Schneider, Hubert Tiefenbacher |
1984-03-06 |
| 4206153 |
Treatment of methanolic-aqueous residues from syntheses employing triphenylphosphonium salts |
Paul Grafen, Hans-Ulrich Scholz |
1980-06-03 |
| 4191692 |
Manufacture of tocopherol |
Paul Grafen, Henning Kroesche, Joachim Paust, Sigberg Pfohl |
1980-03-04 |
| 4182731 |
Preparation of aqueous solutions or fine aqueous dispersions of polyenyltriarylphosphonium salts |
Paul Grafen, Hans-Ulrich Scholz, Hans Grassner, Werner Reif |
1980-01-08 |
