| Patent Number |
Title Of Patent |
Date Issued |
| 7540884 |
Method for performing the purifying separation of crystals out their suspension in a mother liqu |
June 2, 2009 |
| A process for purifying removal of crystals from their suspension in mother liquor by means of a washing column having forced transport in which the process chamber is encased by a metal wall which, on its side facing away from the process chamber, is heated at least along the length |
| 6939991 |
Preparation of acrylic acid |
September 6, 2005 |
| In a process for preparing acrylic acid, an acrylic acid-containing product gas mixture obtained by catalytic gas phase partial oxidation of a C.sub.3 precursor of acrylic acid, after direct cooling with a quench liquid, is fractionally condensed in a separating column provided with inte |
| 6534680 |
Dicarboxylic acid crystallizates |
March 18, 2003 |
| Dicarboxylic acid crystals are prepared from a solution containing at least one organic dicarboxylic acid in a process in which at least one anionic polyelectrolyte having a molecular weight of at least 2000 is added to the solution before or during the crystallization. |
| 6242639 |
Preparation of neopentyl glycol hydroxyprivalate granules |
June 5, 2001 |
| A method for preparing neopentyl glycol hydroxypivalate granules by application of a neopentyl glycol hydroxypivalate melt (1) onto a cooling belt (6) on which the melt solidifies, wherein the melt contains at least so 3 wt % of neopentyl glycol hydroxypivalate crystals, based on the tot |
| 6113657 |
Purification of caustic soda |
September 5, 2000 |
| In a process for preparing crystalline NaOH.3.5H.sub.2 O, NaOH.3.5H.sub.2 O is allowed to crystallize from an aqueous sodium hydroxide solution which contains sodium chloride and is saturated in respect of NaOH.3.5H.sub.2 O and the crystals formed are separated from the solution using a |
| 5981798 |
Preparation of a crystalline solid from glycine-N,N-diacetic acid derivatives with sufficiently |
November 9, 1999 |
| A crystalline solid which has a sufficiently low hygroscopicity for processing and use and essentially consists of glycine-N,N-diacetic acid derivatives is prepared by adjusting the water content of the starting material containing the glycine-N,N-diacetic acid derivatives to a value |
| 5936115 |
Production of clumping-free neopentyl glycol hydroxpivalate granules |
August 10, 1999 |
| In a process for the production of neopentyl glycol hydroxypivalate granules by depositing a neopentyl glycol hydroxypivalate melt on a chill surface, on which the melt solidifies, as a flat film, which, after solidification, is comminuted to give granules. The melt contains less tha |
