Method and apparatus for preparing dispersions containing active substances

• Main Authors: RIEDE, THOMAS, GOEBEL, WERNER, LOCKEMANN, CHRISTIAN
• Format: Patent
• Language: English; French; German
• Published: 24.10.2001
• Edition: 7
• Subjects: ADHESIVES; AGRICULTURE; ANIMAL HUSBANDRY; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; DYES; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; HYGIENE; LAKES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING; MORDANTS; NATURAL RESINS; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; PERFORMING OPERATIONS; PEST REPELLANTS OR ATTRACTANTS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PLANT GROWTH REGULATORS; POLISHES; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; THEIR RELEVANT APPARATUS; TRANSPORTING; TRAPPING

Prodn. of a dispersion contg. an active agent (I) comprises (a) dissolving (I) in a fluid gas; and either (bi) dissolving the soln. completely in another liq.; and (bii) releasing the pressure: or (c1) forming a dispersion of the soln. in a liq. satd. with the gas; (cii) passing through a dwell zone to form a second dispersion; and (ciii) releasing the pressure; or (d1) releasing the pressure to form a fine dispersion of (I) in (II); (dii) dispersing in a second fluid; and (diii) passing through a dwell zone and separating into a gas phase and a dispersion.