Inventor
HASSELBACH HANS JOACHIM
DE33 patents
⚠️ This page may combine multiple inventors who share the name “HASSELBACH HANS JOACHIM”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DEGUSSA
15 patentsUS5990349ANov 23, 1999
Process for the preparation of D,L-methionine or the salt thereof
DEGUSSA42 citations94
US5770769AJun 23, 1998
Process for the preparation of D,L-methionine or the salt thereof
DEGUSSA59 citations94
US6126972AOct 3, 2000
Process for the preparation of aqueous sodium methioninate solutions and use of those solutions in the production of a granulate
DEGUSSA21 citations90
US6008409ADec 28, 1999
Method for obtaining 2-hydroxy-4-methylthiobutyric acid (MHA) which is stable in storage
DEGUSSA19 citations89
US7655072B2Feb 2, 2010
Process for purifying CO2 gas streams
DEGUSSA19 citations82
US6265617B1Jul 24, 2001
Process for the preparation of 3,5,5-trimethylcyclohexa-3-en-1-one (β-isophorone) by isomerization of 3,5,5- trimethylcyclohexa-2-en-1-one (α-isophorone)
DEGUSSA6 citations73
US7179938B2Feb 20, 2007
Process for the preparation of methionine
DEGUSSA6 citations72
US6140536AOct 31, 2000
Process for obtaining 2-hydroxy-4-methylthiobutyric acid (MHA)
DEGUSSA9 citations69
US6329535B1Dec 11, 2001
Process for preparing esterified chroman compounds
DEGUSSA3 citations63
US6797827B2Sep 28, 2004
Process for the preparation of alpha-amino acids by hydrolysis of hydantoins at elevated pressure and elevated temperature
DEGUSSA6 citations62
US5049283ASep 17, 1991
Method for the recovery of aqueous solutions of free, neutral α-amino acids from aqueous solutions of their alkali-metal salts
DEGUSSA6 citations62
US7199270B2Apr 3, 2007
Method for the separation of methyl mercaptan from reaction gas mixtures
DEGUSSA5 citations59
US6150563ANov 21, 2000
Aliphatic alkanals with improved storage stability and method of improving the storage stability
DEGUSSA6 citations59
US7119228B2Oct 10, 2006
Process for producing methionine
DEGUSSA6 citations57
US6146612ANov 14, 2000
Method for recovering sulfuric acid from sulfate salts
DEGUSSA0 citations50
EVONIK OPERATIONS GMBH
6 patentsUS10899706B2Jan 26, 2021
Method for preparing methionine
EVONIK OPERATIONS GMBH3 citations68
US10919848B2Feb 16, 2021
Process for preparing methionine
EVONIK OPERATIONS GMBH0 citations58
US10683240B2Jun 16, 2020
Production method for dipeptide-containing granules
EVONIK OPERATIONS GMBH1 citations56
US12195422B2Jan 14, 2025
Process for the preparation of D,L-methionine
EVONIK OPERATIONS GMBH0 citations54
US11180426B2Nov 23, 2021
Dipeptide-containing granular material
EVONIK OPERATIONS GMBH0 citations54
US12512186B2Dec 30, 2025
Method and system for process control
EVONIK OPERATIONS GMBH0 citations39