1
Uwe Prange, Moustafa El Chahawi, Wilhelm Vogt, Hermann Richtzenhain: Method of preparing malonic acid dialkyl esters. Dynamit Nobel Aktiengesellschaft, Felfe & Lynch, August 16, 1983: US04399300 (38 worldwide citation)

Production of malonic acid dialkyl esters by reacting halogen acetic acid alkyl ester with carbon monoxide, and alkali alcoholate, alkali earth alcoholate or a solution of alkali hydroxide in an alcohol at a pH of up to 8.5 in the presence of a cobalt compound which is a catalyst for the reaction.


2
Gerhard Bier, Dagmar Kottek, Egon N Petersen, Hermann Richtzenhain, Norbert Vollkommer: Bis-carbalkoxy compounds and their preparation. Dynamit Nobel Aktiengesellschaft, Sprung Felfe Horn Lynch & Kramer, September 8, 1981: US04288607 (17 worldwide citation)

The invention relates to halogenous polyesters with the recurrent general formula ##STR1## in which at least part of the R's, e.g. 1 to 100 mole-%, preferably 100 mole-%, or 2 to 10 mole-%, are of the general formulas ##STR2## and 0 to 99 mole-%, preferably 0 or 90 to 98 mole-%, of the R's correspon ...


3

4
Gerhard Daum, Hermann Richtzenhain: Method of preparing 3-methyl pyridine. Dynamit Nobel Aktiengesellschaft, Burgess Dinklage & Sprung, April 25, 1978: US04086237 (10 worldwide citation)

3-METHYL PYRIDINE IS PRODUCED BY CATALYTIC, E.G. PALLADIUM, DEHYDROGENATION OF 2-METHYL-1,5-DIAMINOPENTANE OR A MIXTURE THEREOF WITH 3-METHYL PIPERIDINE, AT 200.degree.-400.degree. C.


5
Moustafa El Chahawi, Hermann Richtzenhain: Method of preparing arylacetic acid alkyl esters. Dynamit Nobel Aktiengesellschaft, Burgess Dinklage & Sprung, August 10, 1976: US03974202 (7 worldwide citation)

In a process of producing an alkyl ester of a substituted or unsubstituted arylacetic acid wherein a substituted or unsubstituted aromatic halogen methyl compound is reacted with carbon monoxide and an alcohol having an alkoxy group the same as that of said ester, the improvement which comprises car ...


6
Abraham P Gelbein, Paul Janssen deceased, Hermann Richtzenhain: Preparation of pyridines and nicotinonitrile from piperidines. The Lummus Company, Marn & Jangarathis, September 27, 1977: US04051140 (7 worldwide citation)

A piperidine, such as methyl piperidine is converted to the corresponding pyridine by the use of a supported vanadia catalyst. Nicotinonitrile can be produced by conversion of 3-methyl piperidine to 3-methyl pyridine with a supported vanadia catalyst, followed by ammonolysis to nicotinonitrile by th ...


7
Hermann Richtzenhain, Rudolf Stephan: Stabilization of 1,1,1-trichloroethane with a three component system. Dynamit Nobel Aktiengesellschaft, Burgess Dinklage & Sprung, May 25, 1976: US03959397 (5 worldwide citation)

A stabilized 1,1,1-trichloroethane composition containing, as stabilizer therefor, a mixture consisting of a nitrile, 1,4-dioxane, and nitromethane.


8
Moustafa El Chahawi, Uwe Prange, Hermann Richtzenhain, Wilhelm Vogt: Method of preparing .alpha.-substituted cyanoacetic acid alkyl esters. Dynamit Nobel Aktiengesellschaft, Sprung Felfe Horn Lynch & Kramer, February 27, 1979: US04141915 (5 worldwide citation)

A process for preparing an .alpha.-substituted cyanoacetic acid alkyl ester which comprises contacting an unsaturated nitrile of the formula ##STR1## wherein R.sup.2 is a hydrogen atom or a methyl group and


9
Egon N Petersen, Norbert Vollkommer, Georg Blumfeld, Hermann Richtzenhain, Wilhelm Vogt: Halogen-containing unsaturated bis-esters and polymers and copolymers based on these esters. Dynamit Nobel Aktiengesellschaft, Sprung Felfe Horn Lynch & Kramer, August 18, 1981: US04284732 (5 worldwide citation)

Halogen-containing bis-acrylates and bis-methacrylates corresponding to the formula ##STR1## in which R represents hydrogen or a methyl group and X represents chlorine and/or bromine, are provided as well as a process for producing such compounds. The compounds are useful for the formation of polyme ...


10
Gerhard Bier, Dagmar Kottek, Egon N Petersen, Hermann Richtzenhain, Norbert Vollkommer: Linear or unsaturated polyesters prepared from bis-carbalkoxy compounds. Dynamit Nobel Aktiengesellschaft, Sprung Felfe Horn Lynch & Kramer, May 1, 1979: US04152511 (4 worldwide citation)

The invention relates to halogenous polyesters with the recurrent general formula ##STR1## in which at least part of the R's, e.g. 1 to 100 mole-%, preferably 100 mole-%, or 2 to 10 mole-%, are of the general formulas ##STR2## and 0 to 99 mole-%, preferably 0 or 90 to 98 mole-%, of the R's correspon ...