Continuous process for making solid, free-flowing water dispersi

Details Continuous process for making solid, free-flowing water dispersi Continuous process for making solid, free-flowing water dispersi

1983-11-21

1984-09-18

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

252 85A, 525 57, C08F 828

Patent

active

044725523

ABSTRACT:
A polyvinyl alcohol-aldehyde reaction product is produced continuously in a rotating contactor by contacting solid particles of the polyvinyl alcohol with the aldehyde in an acidic aqueous salt solution. The product can be dried and then sieved to remove oversize particles. A preferred aldehyde is either formaldehyde or glutaraldehyde which reacts with the polyvinyl alcohol to produce a reaction product that can be used as a fluid loss control agent in oil fields.

REFERENCES:
patent: 4240915 (1982-12-01), Block

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