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2 092 311

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Application

93017923/25, 1993-04-06

(22)

Actual filing date

1993-04-06

(45)

Published

1997-10-10

(72)

Inventor

Safin R.G.Lashkov V.A.Kolesov B.S.Votjakov V.M.Kondrasheva S.G.

(73)

Holder

Nauchno-Tekhnicheskij Tsentr Po Razrabotke Progressivnogo Oborudovanija

METHOD OF ISOLATION OF POLYMER FROM SOLUTION Russian patent published in 1997 - IPC

Abstract RU 2092311 C1

FIELD: polymer production. SUBSTANCE: polymer solution in closed space is heated to a temperature not exceeding 160 C and solid phase is separated when dispersing solution at pressure falling from initial value to atmosphere pressure. Initial pressure value is determined from formula Pin = where Pin,Pa are initial and atmospheric pressures, kPa; xi weight concentration of i-th solution component, kg/kg; μi molecular weight of i-th component; T temperature of solution; and Ai, Bi empirical coefficients in Antoine equation. Polymer particles are then dried and secondary vapors are recovered. Polymer particles' drying is carried out with transferring recovered vapors into final treatment stage in overheated steam medium at 140-150 C. EFFECT: optimized process parameters. 1 dwg

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RU 2 092 311 C1

Authors

Safin R.G.

Lashkov V.A.

Kolesov B.S.

Votjakov V.M.

Kondrasheva S.G.

Dates

1997-10-10—Published

1993-04-06—Filed

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