公开(公告)号：DE4408957A1

公开(公告)日：1995-09-21

申请号：DE4408957

申请日：1994-03-17

Applicant: BASF AG

Inventor： STRECKER BEATE DR ,  BURAK THOMAS ,  OFTRING ALFRED DR ,  HERTEL DIETER ,  VOGT VOLKER DR ,  SCHUH GEORG

IPC: C07C231/02 ,  C07C233/47 ,  C07C233/49 ,  C07C303/22 ,  C07C309/15 ,  C07C309/32 ,  C07C229/12 ,  C07C227/18 ,  C07C227/38 ,  C07C303/32 ,  C07C309/18

Abstract: Prepn. of N-acylamino-carboxylic or sulphonic acids (I) or their alkali metal salts comprises (a) preparing a suspension of a solid, anhydrous alkali metal salt (II) of an aminocarboxylic or aminosulphonic acid in an alkyl carboxylate ester (III); (b) carrying out reaction to prepare an alkali metal salt of (I), by adding a catalytic amt. of strong base; and opt. (c) converting the salt into free (I) by addn. of acid.

公开(公告)号：DE4235784A1

公开(公告)日：1994-04-28

申请号：DE4235784

申请日：1992-10-23

Applicant: BASF AG

Inventor： STRECKER BEATE DR ,  WOLF HELMUT ,  WOLF GERHARD DR ,  OFTRING ALFRED DR ,  BECHTOLSHEIMER HANS-HEINRICH D ,  HERTEL DIETER

IPC: C07C231/02 ,  C07C233/18 ,  C07H15/04 ,  C07H5/06

Abstract: Prepn. of N-alkanoyl-polyhydroxyalkylamines of formula Z-N(R1)C(=O)R2 (I) comprises reacting polyhydroxyalkylamines of formula Z-NH-R1 (II) with alkyl esters of carboxylic acids of formula R3-O-C(=O)-R2 (III), in presence of a basic catalyst. In the prepn. of (a) the total amt. of (III) is heated to 90-130 deg.C and an aq. soln. of (II) is added, with the water introduced being continuously removed by distn. (b) the catalyst is added to the fine suspension of (II) in (III) and conversion to (I) is carried out at 70-100 deg.C with continuous removal by distn. of the alcohol, R3-OH formed and (c) conversion is in absence of organic solvents. In the formulae, Z = polyhydroxyalkyl residue of a mono- or oligo-saccharide; R1 = H or 1-8C alkyl; R2 = 1-21C alkyl; R3 = 1-4C alkyl. USE/ADVANTAGE - (I) are surfactants, used in washing and cleaning compsns. Colourless or light coloured prods. with a high (I) content and smaller amts. of starting materials and by-prods. are obtd. needing no further purification. Formation of clumps and deposits in the reactor is avoided, and the process can be used on the large scale.