Agglomerate-free suspension

For PTFE incorporation in Ni non-ionic fluorosurfactants were used to obtain a agglomerate-free suspension. Combined with a cationic fluorosurfactant they allow the deposition of composites containing up to... 

Synthetic hydroxyapatites were prepared by the method of Hayek and co-workers (7, 8), modified to produce a product of small particle size. The products were isolated by washing the gel slurry with water until free of nitrate ion. The resultant suspensions were then spray-dried with a Minor Type 53 Niro Atomizer (Copenhagen, Denmark). The resultant dry products were in the form of porous, spherical polycrystalline agglomerates of 5 to 8 fi average diameter. The specific surfaces of these products ranged from 104 to 180 meter2/gram. 

Other flaky chemicals obtained from drum coolers or dryers that have similar properties as those of the fresh DMT can be similarly converted into dense free flowing intermediate products by pelleting, briquetting, or compaction/granulation. Drum dryers feature heated drums that either dip into a bath of suspended particles or are coated by means of axial dispensers with the suspension. As in the case of drum coolers, dry solids are removed from the drum with scrapers and are typically bulky and dusty before suitable agglomeration has taken place. 

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