| 5808142 |
Process for the preparation of 2-hydroxynaphthalene-6-carboxylic acid |
Hans-Martin Ruffer, Jorg Schmid, Thomas Wisser |
1998-09-15 |
| 5643494 |
Process for the preparation of aromatic hydroxy carboxylic acids |
Hans-Martin Ruffer, Jorg Schmid, Thomas Wisser |
1997-07-01 |
| 5543564 |
Process for releasing acidic organic compounds from salts thereof by carbon dioxide |
J urgen Kulpe, Heinz Strutz, Hans-Martin R uffer |
1996-08-06 |
| 5532406 |
Process for preparing aromatic hydroxycarboxylic acids |
Hans-Martin Ruffer, Jorg Schmid, Thomas Wisser |
1996-07-02 |
| 5447541 |
Process for separating and purifying substances by crystallization from the melt under high pressure |
Rudolf Steiner, Axel Konig |
1995-09-05 |
| 5447542 |
Process for separating and purifying substances by crystallization from the melt |
Rudolf Steiner, Axel Konig |
1995-09-05 |
| 5419815 |
Process for purifying fatty acid amides |
Norbert Doerpinghaus |
1995-05-30 |
| 5401859 |
Process for the preparation of pure trioxane |
Karl-Friedrich Muck, Helmut Schlaf |
1995-03-28 |
| 5312976 |
Process for the preparation of 2-hydroxy-naphthalene-6-carboxylic acid |
Volker Hautzel |
1994-05-17 |
| 5281479 |
Corrosion and heat-resistant ordered packing for mass transfer and heat exchange processes |
Jurgen Spiske, Dieter Kompalik, Udo Gruber |
1994-01-25 |
| 5271811 |
Process for purifying 2-(4-isobutylphenyl)-propionic acid by vacuum distillation |
Adolf Schmidt, Larry O. Wheeler, Gary L. Moss, Edward G. Zey |
1993-12-21 |
| 5152875 |
Separation of m- and p-dichlorobenzene |
Adolf Schmidt, Rudolf Steiner, Leonhard Unverdorben |
1992-10-06 |
| 5136083 |
Process for the purification of 4-acetoxystyrene |
Jack Chosnek, George E. Beck, Donna L. Keene, Volker Hautzel |
1992-08-04 |
| 5081263 |
Dioxane adducts of aromatic meta- or para-hydroxy-carboxlic acids |
von Helmold Plessen |
1992-01-14 |
| 5047558 |
Process for the preparation of a dioxane adduct of 2-hydroxynaphthalene-6-carboxylic acid |
Helmold von Plessen |
1991-09-10 |
| 5028736 |
Process for the separation and recovery of naphthalene-sulfonic acids from aqueous solutions |
Ulrich Girrbach, Siegfried Bildstein, Klaus Schmiedel |
1991-07-02 |
| 5013444 |
Process for separating off enol ethers from reaction mixtures containing alcohols |
Hilmar Mildenberger, Stephen Lachhein, Heribert Tetzlaff |
1991-05-07 |
| 4925959 |
Dioxane adduct of 2-hydroxynaphthalene-6-carboxylic acid and process for the preparation thereof |
Helmold von Plessen |
1990-05-15 |
| 4923485 |
Process for separating organic constituents from waste gases of the production of aromatic intermediates |
Ernst Horoldt, Richard C. Grimm, Herbert Kuckertz, Wilfried Billmann |
1990-05-08 |
| 4918225 |
Process for the preparation of pure crotonic acids |
Herbert Gortz, Knut Riedel |
1990-04-17 |
| 4916257 |
Process for the purification of 2-hydroxynaphthalene-6-carboxylic acid |
Helmold von Plessen, Heinrich Volk, Werner Wykypiel, Rudolf Neeb |
1990-04-10 |
| 4864065 |
Process for removing halogenated hydroxyaromatics from aqueous solutions |
Bernhard Wojtech, Heinz Reiss, Reinhard Zunder |
1989-09-05 |
| 4814518 |
Process for extracting nitrohydroxyaromatics from aqueous solutions |
Helmut Gossel, Herbert Kuckertz, Josef Rosenfelder, Bernhard Wojtech |
1989-03-21 |
| 4683034 |
Process for separating dimethyl isophthalate and dimethyl orthophthalate from their mixture with dimethyl terephthalate |
Rolf Bader, Hartmut Last, Manfred Mayer, Edgar Wetzel |
1987-07-28 |
| 4617197 |
Process for improving the wetting characteristics of the surface of shaped plastics articles for applications in chemical engineering |
Eugen Morach, Hubert Schindler, Peter John |
1986-10-14 |
