Title:
A manufacturing process of water absorbency polymer
Document Type and Number:
Japanese Patent JP6184082
Kind Code:
B2
Abstract:
Preparation of water-absorbing polymers (A) with drying quality index comprises polymerizing a monomer solution and drying the obtained hydrogel agent in hot-gas flow, where the drying process takes place in at least two temperature zones, when the flow of the hydrogel in the gas flow is: downwards in the front side of the volume drier, and upwards against the rear side of the drier; where the amount of water in the hydrogel is 15-45 wt.%, the hydrogel layer in the volume drier flows at least partially against down wards, and the speed of the gas is 5-30%. Preparation of water-absorbing polymers (A) with drying quality index comprises polymerizing a monomer solution and drying the obtained hydrogel agent in hot-gas flow, where the drying process takes place in at least two temperature zones, when the gas inlet temperature (T n) is not equal to T n + a; and flow of the hydrogel in the gas flow is: downwards in the front side of the volume drier, and upwards against the rear side of the drier; where the amount of water in the hydrogel is 15-45 wt.%, the hydrogel layer in the volume drier flows at least partially against down wards, and the speed of the gas is 5-30%. n : index; and a : greater than 0. An independent claim is included for a device for drying (A) comprising a gas permeable conveyer belt (which is streamed by a preheated gas), where the gas inlet temperature is adjusted such that it can come form at least two temperature zones.
Inventors:
Matthias Weismantel
Stefan Bruns
Dominicus fan es brook
Stefan Bruns
Dominicus fan es brook
Application Number:
JP2012257965A
Publication Date:
August 23, 2017
Filing Date:
November 26, 2012
Export Citation:
Assignee:
BASF SE
International Classes:
C08F6/10
Domestic Patent References:
| JP873518A | ||||
| JP11292919A | ||||
| JP2003261601A | ||||
| JP201353315A |
Other References:
HANDBOOK OF INDUSTRIAL DRYING SECOND EDITION REVISED AND EXPANDED VOLUME 1,1995年,p.525-528
Fredric L. Buchholz et al.,Modern Superabsorbent Polymer Technology,1998年,p.69-74,87-93,143-144
38363; Drying of Pasty Materials Using a Continuous Through-Circulation Belt Dryer,Research Disclosure,1996年,p.220-222
Fredric L. Buchholz et al.,Modern Superabsorbent Polymer Technology,1998年,p.69-74,87-93,143-144
38363; Drying of Pasty Materials Using a Continuous Through-Circulation Belt Dryer,Research Disclosure,1996年,p.220-222
Attorney, Agent or Firm:
Einzel Felix-Reinhard
Junichi Maekawa
Hiroyasu Ninomiya
Ueshima
Shuichi Sumiyoshi
Junichi Maekawa
Hiroyasu Ninomiya
Ueshima
Shuichi Sumiyoshi
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