Inventor · disambiguated record
Heinz Erpenbach
Also filed as: ERPENBACH HEINZ · ERPENBACH HEINZ DR
36 granted patents·504 citations·filing 1973–1994
98Inventor score
Top patents by PatentIndex Score
36 records- 0194US4280010AContinuous production of alkyl acrylates free from etherHOECHST AG·Filed 1979·Granted Jul 21, 1981·44 cites·11 claims
- 0292US4664753AProcess for separating iodine and its compounds from the carbonylation products obtained by subjecting dimethylether, methyl acetate or methanol to a carbonylation reactionHOECHST AG·Filed 1984·Granted May 12, 1987·31 cites·8 claims
- 0391US4430273AProduction of acetic anhydrideHOECHST AG·Filed 1982·Granted Feb 7, 1984·35 cites·7 claims
- 0490US3954854ARecovery of monomeric acrylic acid from residues originating from processed crude acrylic acidHOECHST AG·Filed 1975·Granted May 4, 1976·29 cites·4 claims
- 0588US5166452AProcess for inhibiting and destroying peroxides in dialkyl ethersHOECHST AG·Filed 1991·Granted Nov 24, 1992·30 cites·3 claims
- 0687US4333884AProduction of acetic anhydrideHOECHST AG·Filed 1980·Granted Jun 8, 1982·26 cites·7 claims
- 0785US5380929AProcess for the preparation of acetic acid and acetic anhydrideHOECHST AG·Filed 1994·Granted Jan 10, 1995·29 cites·7 claims
- 0883US4444624AProcess for separating acetone from carbonylation mixturesHOECHST AG·Filed 1982·Granted Apr 24, 1984·18 cites·10 claims
- 0983US4012439AContinuous production of n-butylacrylate free from dibutyletherHOECHST AG·Filed 1975·Granted Mar 15, 1977·21 cites·1 claims
- 1080US5124290AProcess for removing metallic corrosion products from carbonylation reactions carried out under anhydrous conditionsHOECHST AG·Filed 1991·Granted Jun 23, 1992·19 cites·12 claims
- 1180US4556644AProcess for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1982·Granted Dec 3, 1985·32 cites·6 claims
- 1279US4717454AProcess for removing acetone from reaction mixtures of carbonylation reactionsHOECHST AG·Filed 1985·Granted Jan 5, 1988·17 cites·5 claims
- 1378US4280009AContinuous production of 2-ethyl-hexyl acrylate free from dioctyletherERPENBACH HEINZ·Filed 1979·Granted Jul 21, 1981·20 cites·3 claims
- 1476US4442304AProcess for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1982·Granted Apr 10, 1984·12 cites·14 claims
- 1571US4557760AProcess 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 dimethyletherHOECHST AG·Filed 1984·Granted Dec 10, 1985·22 cites·6 claims
- 1670US4746640AProcess for purifying and recovering catalyst solution contaminated during the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1987·Granted May 24, 1988·10 cites·5 claims
- 1769US4629711AProcess for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1986·Granted Dec 16, 1986·23 cites·6 claims
- 1868US4414160AProcess for making carboxylic acid halidesHOECHST AG·Filed 1981·Granted Nov 8, 1983·8 cites·5 claims
- 1966US4260520ACarrier-supported catalyst and process for making itHOECHST AG·Filed 1979·Granted Apr 7, 1981·6 cites·9 claims
- 2063US4549937AProcess for separating the catalyst system from the reaction mixtures of carbonylation reactionsHOECHST AG·Filed 1982·Granted Oct 29, 1985·7 cites·4 claims
- 2160US5002914AProcess for purifying and recovering the contaminated catalyst solution arising in the carbonylation of methanol and/or methyl acetate and/or dimethyl etherHOECHST AG·Filed 1990·Granted Mar 26, 1991·7 cites·4 claims
- 2258US4543217AProcess for making carboxylic acid halidesHOECHST AG·Filed 1983·Granted Sep 24, 1985·5 cites·4 claims
- 2355US4252983AProduction of acetic anhydride and acetic acid from acetaldehydeHOECHST AG·Filed 1978·Granted Feb 24, 1981·4 cites·3 claims
- 2450US4440570AProcess for purifying and recovering contaminated catalyst solution obtained in the carbonylation of methyl acetate and/or dimethyletherHOECHST AG·Filed 1982·Granted Apr 3, 1984·9 cites·7 claims
- 2544US4319038AProduction of 1,1-diacetoxyethaneHOECHST AG·Filed 1980·Granted Mar 9, 1982·3 cites·3 claims
- 2644US3985800AProcess for the manufacture of acrylic acidHOECHST AG·Filed 1973·Granted Oct 12, 1976·2 cites·5 claims
- 2741US5047377AProcess for the purification and recovery of the contaminated solution of the catalyst produced on carbonylation of methanol and/or methyl acetate and/or dimethyl etherHOECHST AG·Filed 1990·Granted Sep 10, 1991·8 cites·5 claims
- 2840US5075485AProcess for the preparation of n-acylphosphinothricin diestersHOECHST AG·Filed 1989·Granted Dec 24, 1991·2 cites·4 claims
- 2940US4308175ACarrier-supported catalyst and process for making itHOECHST AG·Filed 1979·Granted Dec 29, 1981·5 cites·3 claims
- 3039US4032410ADistilling columnHOECHST AG·Filed 1976·Granted Jun 28, 1977·8 cites·3 claims
- 3138US5296630AProcess for continuously producing an anhydrous methyl acetate/methanol mixtureHOECHST AG·Filed 1990·Granted Mar 22, 1994·6 cites·10 claims
- 3238US4985383AProcess for removing metallic corrosion products from a contaminated catalyst solution produced on carbonylation of methanol and/or methyl acetate and/or dimethyl etherHOECHST AG·Filed 1990·Granted Jan 15, 1991·5 cites·6 claims
- 3336US4898966AProcess for the preparation of phenylalanine n-propyl ester hydrochlorideHOECHST AG·Filed 1988·Granted Feb 6, 1990·1 cites·4 claims
- 3431US4892971AProcess for the preparation of n-acetylphenylalanineHOECHST AG·Filed 1988·Granted Jan 9, 1990·0 cites·3 claims
- 3530US4351972AProcess for making anhydrous alkyl iodidesHOECHST AG·Filed 1981·Granted Sep 28, 1982·0 cites·4 claims
- 3625US4352761AProduction of acetyl chlorideHOECHST AG·Filed 1981·Granted Oct 5, 1982·0 cites·5 claims
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