公开(公告)号：US20210402373A1

公开(公告)日：2021-12-30

申请号：US17289302

申请日：2019-11-04

Applicant: BASF SE

Inventor： Monte Alan Peterson ,  Ronny De Kaey ,  Karl Possemiers ,  Juergen Schroeder ,  Ruediger Funk ,  Matthias Weismantel

IPC: B01J20/30 ,  B01J20/26 ,  B01J19/00 ,  B01J19/24

Abstract: The invention relates to a process for producing superabsorbent polymer particles, comprising polymerization of a monomer solution, wherein the monomer solution comprises partly neutralized acrylic acid formed by continuous mixing of acrylic acid and an aqueous solution of a base, the apparatus for preparing the partly neutralized acrylic acid comprises a vessel (B), and the vessel (B) has a cylindrical shape and a torispherical bottom.

公开(公告)号：US20210291145A1

公开(公告)日：2021-09-23

申请号：US17258931

申请日：2019-07-15

Applicant: BASF SE

Inventor： Marco Krueger ,  Ruediger Funk ,  Thomas Pfeiffer ,  Karl Possemiers ,  Juergen Schroeder ,  Matthias Weismantel

IPC: B01J20/26 ,  B01J20/28 ,  B01J20/30 ,  C08F20/06 ,  C08J3/24 ,  A61L15/60 ,  A61L15/26

Abstract: A process for producing superabsorbent particles by polymerizing a monomer solution or suspension, comprising the steps of continuously preneutralizing a monomer while cooling and partly recycling the preneutralized monomer into the preneutralization, continuously heating the preneutralized monomer by means of a heat exchanger and continuously postneutralizing the heated monomer, wherein the monomer solution or suspension prior to entry into the polymerization reactor is at a temperature of 70 to 99° C. and the temperature of the heating medium used in the heat exchanger is less than 160° C.

公开(公告)号：US10683371B2

公开(公告)日：2020-06-16

申请号：US15773591

申请日：2016-11-15

Applicant: BASF SE

Inventor： Marco Krueger ,  Karl Possemiers ,  Gerald Gruenewald ,  Juergen Freiberg ,  Markus Muehl

IPC: C08F2/01 ,  B01J4/00 ,  C08F2/34 ,  B01J19/24 ,  B01J2/16 ,  B01J8/24 ,  C08F2/12 ,  C08F2/14 ,  C08F20/14

Abstract: The invention relates to an apparatus for producing pulverulent poly(meth)acrylate, comprising a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the preparation of the poly(meth)acrylate having holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point on the circumference of the reactor, a fluidized bed and an apparatus for product discharge from the fluidized bed. The apparatus for product discharge comprises a discharge apparatus, with a backup segment (39) disposed above the discharge apparatus.

公开(公告)号：US20180319906A1

公开(公告)日：2018-11-08

申请号：US15773591

申请日：2016-11-15

Applicant: BASF SE

Inventor： Marco Kruger ,  Karl Possemiers ,  Gerald Gruenewald ,  Juergen Freiberg ,  Markus Muehl

IPC: C08F2/01 ,  C08F2/12 ,  C08F20/14 ,  B01J2/16 ,  B01J19/24 ,  B01J4/00

CPC classification number: C08F2/01 ,  B01J2/16 ,  B01J4/002 ,  B01J19/24 ,  B01J19/2405 ,  B01J2219/00414 ,  B01J2219/0072 ,  B01J2219/185 ,  C08F2/12 ,  C08F2/34 ,  C08F20/14

Abstract: The invention relates to an apparatus for producing pulverulent poly(meth)acrylate, comprising a reactor for droplet polymerization having an apparatus for dropletization of a monomer solution for the preparation of the poly(meth)acrylate having holes through which the monomer solution is introduced, an addition point for a gas above the apparatus for dropletization, at least one gas withdrawal point on the circumference of the reactor, a fluidized bed and an apparatus for product discharge from the fluidized bed. The apparatus for product discharge comprises a discharge apparatus, with a backup segment (39) disposed above the discharge apparatus.