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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:
マティアス ヴァイスマンテル
シュテファン ブルーンス
ドミニクス ファン エスブルーク
Application Number:
JP2012257965A
Publication Date:
August 23, 2017
Filing Date:
November 26, 2012
Export Citation:
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Assignee:
BASF SE
International Classes:
C08F6/10
Domestic Patent References:
JP873518A
JP11292919A
JP2003261601A
JP201353315A
Foreign References:
Attorney, Agent or Firm:
アインゼル・フェリックス=ラインハルト
前川 純一
二宮 浩康
上島 類
住吉 秀一