公开(公告)号：DE3241445A1

公开(公告)日：1983-05-19

申请号：DE3241445

申请日：1982-11-10

Applicant: BASF AG

Inventor： ROTHER EBERHARD DIPL CHEM DR ,  FAULHABER FRIEDR-RICHARD DIPL ,  KURZ HANS PETER DIPL ING DR ,  ASCHERL HERMANN ,  JUNG ARMIN DIPL ING

IPC: C07C273/18 ,  C07C275/06 ,  C07C127/15

Abstract: Isobutylenediurea is prepared by reacting aqueous urea solutions containing 60 to 90% by weight of urea and having a pH of 2.5 to 4 with isobutyraldehyde at temperatures of 40-90 DEG C and neutralising the reaction mixture obtained to a pH of 5 to 8. The reaction is carried out in a reaction zone while maintaining a mean dwell time of 3 to 10 minutes and a dwell-time behaviour characterised by a base stone number of 12 to 26. The reaction mixture obtained is neutralised in an immediately adjacent neutralisation zone while maintaining the same dwell time and the same dwell-time behaviour.

公开(公告)号：DE3044903A1

公开(公告)日：1982-07-08

申请号：DE3044903

申请日：1980-11-28

Applicant: BASF AG

Inventor： LEUTNER BERND DIPL CHEM DR ,  PURUCKER BERNHARD DIPL CHEM DR ,  ROTHER EBERHARD DIPL CHEM DR ,  JUERGENS GEERD FRIEDRICH ,  WAGNER DIETER ING GRAD

IPC: C05D9/02

Abstract: A multi-trace element fertilizer which contains magnesium as a further nutrient and in which the complex-forming trace elements are present in the form of anionic chelates with one or more N-carboxyalkylaminoacids is prepared by a process wherein the N-carboxyalkylaminoacids are reacted, in the presence of water, with the trace elements or trace element compounds in a molar ratio of N-carboxyalkylaminoacids to trace elements or trace element compounds of not less than 0.8:1, at least 20% by weight of the trace element compounds being oxides, hydroxides and/or carbonates. At the same time, or subsequently, the pH of the solution is brought to 3.5-6 by adding a member selected from the group consisting of magnesium oxide, hydroxide and carbonate. A maximum of 50 equivalent percent of the magnesium compound may however be replaced by a member selected from the group consisting of alkali metal oxides, hydroxides and carbonates and ammonia.

公开(公告)号：DE2644732A1

公开(公告)日：1978-04-06

申请号：DE2644732

申请日：1976-10-04

Applicant: BASF AG

Inventor： MAIER SIEGFRIED DIPL ING DR ,  ROTHER EBERHARD DIPL CHEM DR ,  POTTGIESSER HERMANN DIPL CHEM ,  RESCH HERMANN ING GRAD

IPC: B01J2/30 ,  C05G3/00

Abstract: Dust-free and non-caking granular materials, especially broken granules from fertilisers and salts are prepared by applying coatings consisting of polymer mixtures. The granular materials have applied to them aqueous suspensions or solutions of a) urea-aldehyde condensation products and/or alkylol ureas and b) polyenes, the amount of solid applied being from 0.3 to 4.0% by weight, based on the amount of granular material.