公开(公告)号：WO2007028751A3

公开(公告)日：2007-06-07

申请号：PCT/EP2006065849

申请日：2006-08-31

Applicant: BASF AG ,  WEISMANTEL MATTHIAS ,  MARCO MICHAEL ,  VAN ESBROECK DOMINICUS ,  POSSEMIERS KARL J ,  DE KAEY RONNY ,  FUNK RUEDIGER

Inventor： WEISMANTEL MATTHIAS ,  MARCO MICHAEL ,  VAN ESBROECK DOMINICUS ,  POSSEMIERS KARL J ,  DE KAEY RONNY ,  FUNK RUEDIGER

IPC: C07C51/41 ,  B01J14/00 ,  C07C57/04 ,  C08F20/06 ,  C08F220/06

CPC classification number: C07C51/412 ,  Y02P20/582 ,  C07C57/04

Abstract: The invention relates to a continuous neutralization method, whereby at least one ethylenically unsaturated carboxylic acid is at least partially neutralized with a base and the temperature of the neutralized solution is less than 70°. The invention also relates to a device for carrying out said method.

Abstract translation: 本发明涉及一种连续中和过程中，至少一种烯属不饱和羧酸是至少用碱部分地中和，中和的溶液的温度低于70℃，和用于执行该方法的装置。

公开(公告)号：WO2007074167A2

公开(公告)日：2007-07-05

申请号：PCT/EP2006070250

申请日：2006-12-28

Applicant: BASF AG ,  STUEVEN UWE ,  DANIEL THOMAS ,  FUNK RUEDIGER ,  WEISMANTEL MATTHIAS ,  VAN ESBROECK DOMINICUS ,  POSSEMIERS KARL ,  HILLEBRECHT ANNEMARIE

Inventor： STUEVEN UWE ,  DANIEL THOMAS ,  FUNK RUEDIGER ,  WEISMANTEL MATTHIAS ,  VAN ESBROECK DOMINICUS ,  POSSEMIERS KARL ,  HILLEBRECHT ANNEMARIE

CPC classification number: C08F2/44 ,  C08F220/06 ,  C08F222/1006

Abstract: The invention relates to a method for producing a water-absorbing resin by polymerization of a reaction mixture comprising at least one hydrophilic monomer and optionally at least one cross-linker, in a reactor. According to said method, at least one first fraction of a particulate additive is admixed to the reaction mixture before the reaction mixture reaches a dwell time of 40 % of the total dwell time in the reactor, and at least one second fraction of a particulate additive is admixed when the reaction mixture reaches a dwell time of 45 % or more of the total dwell time in the reactor. The additive is selected from the group of water-adsorbing resin powders, fillers and mixtures thereof, the total solids content of the monomer and the additive being 30 to 60 % by weight, the amount of the additive being 5 to 50 % by weight, based on the monomer, and the weight ratio of the first fraction to the second fraction of the additive being 10:1 to 1:5. The resin powder is constituted of, e.g., recycled fines. Bot the residual monomer content, especially the residual cross-linker content, and the content in extractable substances of the water-absorbing resin are reduced by the described manner of admixture. A high percentage of additives can be incorporated without deteriorating the properties of the water-absorbing resin so obtained. The additives form a sufficiently strong compound with the resin without excessive dust formation when the resin is exposed to mechanical stress.

Abstract translation: 本发明涉及一种方法，用于通过反应混合物的聚合制造的吸水性树脂，任选地包含在反应器中的至少一种亲水性单体和至少一种交联剂，其中，所述反应混合物中之前至少一个微粒添加剂的第一部分干涉在反应混合物中 的在反应器中，并用颗粒添加剂的至少一个第二部分的总停留时间的40％达到停留时间，当反应混合物已达到的在反应器中的总停留时间为45％以上的停留时间，其中所述添加剂的吸水性树脂粉末，填料和它们的混合物 被选择，单体和添加剂的30至60重量％，添加剂5至50重量％的量存在，基于单体的总固体含量，并且所述第一部分的所述添加剂的所述第二部分的重量比为10：1的 15至 1：5。 树脂粉末是z。 B.回收的罚款。 通过所述的添加方式，残余单体含量，特别是残余交联剂含量和吸水性树脂的可萃取物的含量都降低。 可以掺入高比例的添加剂而不降低所得吸水性树脂的性能。 添加剂与树脂结合得足够牢固，因此在机械应力下不会发生过多的粉尘

公开(公告)号：BRPI0608923A2

公开(公告)日：2010-11-03

申请号：BRPI0608923

申请日：2006-03-23

Applicant: BASF AG

Inventor： WEISMANTEL MATTHIAS ,  BRUHNS STEFAN ,  VAN ESBROECK DOMINICUS

IPC: C08F2/04 ,  A61L15/12 ,  C08F6/10 ,  C08F20/06 ,  C08J3/075 ,  F26B17/00

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.

公开(公告)号：ZA200709067B

公开(公告)日：2010-01-27

申请号：ZA200709067

申请日：2007-10-22

Applicant: BASF AG

Inventor： WEISMANTEL MATTHIAS ,  BRUHNS STEFAN ,  VAN ESBROECK DOMINICUS

IPC: A61L20100101 ,  C08F20100101 ,  C08J20100101 ,  F26B20100101

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.