Heinz Erpenbach
36Patents
11h-index
30Co-inventors
75Inventor score
Filing activity: Aug 31, 1973 → May 2, 1994
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4556644A | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5166452A | Process for inhibiting and destroying peroxides in dialkyl ethers | Chemistry; Metallurgy | 28 | Expired |
| US4664753A | Process for separating iodine and its compounds from the carbonylation products obtained by subjecting dimethylether, methyl acetate or methanol to a carbonylation reaction | Chemistry; Metallurgy | 27 | Expired |
| US3954854A | Recovery of monomeric acrylic acid from residues originating from processed crude acrylic acid | Chemistry; Metallurgy | 24 | Expired |
| US4430273A | Production of acetic anhydride | Chemistry; Metallurgy | 23 | Expired |
| US4280010A | Continuous production of alkyl acrylates free from ether | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4557760A | Process for recovering noble metals belonging to group VIII of the Periodic System of the elements from a contaminated catalyst solution originating from the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4629711A | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 19 | Expired |
| US5380929A | Process for the preparation of acetic acid and acetic anhydride | Chemistry; Metallurgy | 17 | Expired |
| US4333884A | Production of acetic anhydride | Chemistry; Metallurgy | 17 | Expired |
| US4280009A | Continuous production of 2-ethyl-hexyl acrylate free from dioctylether | Chemistry; Metallurgy | 12 | Expired |
| US4442304A | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4440570A | Process for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4032410A | Distilling column | Performing Operations; Transporting | 8 | Expired |
| US4746640A | Process for purifying and recovering catalyst solution contaminated during the carbonylation of methyl acetate and/or dimethylether | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4414160A | Process for making carboxylic acid halides | Chemistry; Metallurgy | 7 | Expired |
| US4444624A | Process for separating acetone from carbonylation mixtures | Chemistry; Metallurgy | 7 | Expired |
| US4717454A | Process for removing acetone from reaction mixtures of carbonylation reactions | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5124290A | Process for removing metallic corrosion products from carbonylation reactions carried out under anhydrous conditions | Chemistry; Metallurgy | 7 | Expired |
| US4012439A | Continuous production of n-butylacrylate free from dibutylether | Chemistry; Metallurgy | 6 | Expired |
| US4260520A | Carrier-supported catalyst and process for making it | Chemistry; Metallurgy | 5 | Expired |
| US4985383A | Process for removing metallic corrosion products from a contaminated catalyst solution produced on carbonylation of methanol and/or methyl acetate and/or dimethyl ether | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4549937A | Process for separating the catalyst system from the reaction mixtures of carbonylation reactions | Chemistry; Metallurgy | 4 | Expired |
| US4543217A | Process for making carboxylic acid halides | Chemistry; Metallurgy | 4 | Expired |
| US4252983A | Production of acetic anhydride and acetic acid from acetaldehyde | Chemistry; Metallurgy | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.