公开(公告)号：DE2907108A1

公开(公告)日：1980-09-04

申请号：DE2907108

申请日：1979-02-23

Applicant: BASF AG

Inventor： LEUTNER BERND DIPL CHEM DR ,  SCHLIMPER HANS-ULRICH DIPL CHE ,  ROTH DIETER DIPL ING DR ,  KREITNER LUDWIG DIPL ING DR ,  SPAHN HEINRICH DIPL ING DR

IPC: C01B33/46 ,  C01B39/02 ,  C01B39/14 ,  C09C3/04 ,  C11D3/12 ,  C01B33/26

Abstract: Storage-stable, pourable and pumpable silicate suspensions are prepared by wet milling of aluminosilicates, after the preparation of the latter, without intermediate drying.

公开(公告)号：DE3013292A1

公开(公告)日：1981-10-15

申请号：DE3013292

申请日：1980-04-05

Applicant: BASF AG

Inventor： PERNER JOHANNES DIPL CHEM DR ,  SPAHN HEINRICH DIPL ING DR ,  FREY GUENTER DIPL CHEM DR ,  HELFERT HERBERT DIPL CHEM DR

IPC: B01D19/04

Abstract: Prepn. of a low-melting foam suppressor in fine particulate form comprises spraying the foam suppressor melt onto fine particles of inert, inorganic support material 0.2-4 pts. wt. of foam suppressor melt and one pt. wt. of carrier material having a mean particle dia. less than 100 micron are used; the carrier particles are at a higher temp. than the m.pt. of the foam suppressor and spraying is carried out until the mixt. agglomerates to particles of dia. 100-1500 micron; there after 0.02-0.3 pts. fine particles having a softening point above the temp. of the mixt. are added and the mixt. is allowed to cool to below the melting temp. of the suppressor. Used as a foam suppressor for household washing powders where the basic anionic constituents tend to excessive foam prodn. Method enables a low-melting foam suppressor to be produced in a powdered form which has a long shelf life. The later addn. of the quantity of powder, which may be the same material as the original carrier material, results in stabilisation of the agglomerated material.

公开(公告)号：DE3019492A1

公开(公告)日：1981-12-03

申请号：DE3019492

申请日：1980-05-22

Applicant: BASF AG

Inventor： EIPPER GUNTER DIPL ING ,  SOMMER KARL DIPL ING ,  LANGENFELDER HANS ,  BEYSE HANS-JOCHEN ING GRAD ,  SPAHN HEINRICH DIPL ING DR

IPC: B01F29/60 ,  B01F29/63 ,  B05B7/08 ,  B01F15/00 ,  B01F7/02

Abstract: Fluid from an external supply delivered to the centre of a rotating drum for mixing powders with liq. is sprayed from nozzles arranged along the central longitudinal axis of the drum. The nozzles are supported on a pipe in the upper half of the drum and can be directed so that the spray impinges on the mixture surface at right angles to provide max. wetting effect. The main nozzle in each sprayer may be supplied from the interior tube of a concentric pair, with the outer tube having smaller nozzles connected to a separate source, e.g. of gas for fluidising the mixer drum contents. In the mixing of colouring materials and dispersants in water, the evolution of dust from very fine particles and the difficulties in wetting such fine particles are overcome by spraying with oil to agglomerate the particles. With the present device the applied fluid, e.g. oil, is uniformly and economically applied, using only a fraction of the amt. with known appts. Specification printed 25.2.82.

公开(公告)号：DE2909671A1

公开(公告)日：1980-10-02

申请号：DE2909671

申请日：1979-03-12

Applicant: BASF AG

Inventor： KRABETZ RICHARD DIPL CHEM DR ,  HERRMANN WALTER DIPL ING DR ,  ENGELBACH HEINZ DIPL CHEM DR ,  PALM PETER ,  SOMMER KARL DIPL ING DR ,  SPAHN HEINRICH DIPL ING DR

IPC: B01J23/00 ,  B01J23/88 ,  B01J23/887 ,  B01J23/888 ,  B01J35/08 ,  B01J35/10 ,  B01J37/02 ,  C07C45/35 ,  C07C45/36 ,  C07C51/235 ,  C07C51/25 ,  C07C57/055 ,  B01J35/02 ,  C07C57/04

公开(公告)号：DE2909670A1

公开(公告)日：1980-10-02

申请号：DE2909670

申请日：1979-03-12

Applicant: BASF AG

Inventor： KRABETZ RICHARD DIPL CHEM DR ,  ENGELBACH HEINZ DIPL CHEM DR ,  PALM PETER ,  SPAHN HEINRICH DIPL ING DR ,  HERRMANN WALTER DIPL ING DR

IPC: B01J23/00 ,  B01J23/88 ,  B01J23/887 ,  B01J35/08 ,  B01J35/10 ,  B01J37/02 ,  B01J35/02

Abstract: A coated catalyst comprising (a) an inert carrier having particles of not less than 100 mu m diameter and a surface area of up to 20 m2/g and (b) a coating which contains the catalytic material and adheres firmly to the outer surface and to the edge zone, near the surface, of the carrier particles, can be prepared by applying the catalytic material as a 10-70% strength suspension in water to the agitated carrier particles, which are at below 70 DEG C., if the suspension is sprayed, at a constant rate of from 0.01 to 2.0 kg of active material/hour/liter of carrier onto the carrier particles, while at the same time uniformly passing from 0.1 to 12 m3 (S.T.P.)/hour/liter of carrier of an inert gas at from 20 DEG to 300 DEG C. over the carrier particles, under conditions such that the water only evaporates incompletely but the water content of the resulting coating is less than the maximum degree of saturation of the catalytic material.