公开(公告)号：DE10225383A1

公开(公告)日：2003-12-18

申请号：DE10225383

申请日：2002-06-07

Applicant: BASF AG

Inventor： NIEKEN ULRICH ,  WATZDORF JOBST RUEDIGER VON ,  KESLER JOCHEN ,  BENTHACK CHRISTINA ,  KROENER HUBERTUS ,  HAUFF THOMAS ,  SCHLEMMER PETER

IPC: B01J19/00 ,  B01J19/18 ,  C08F2/22 ,  G05B23/02

Abstract: In a process to convert emulsified polymers to polymers in an exothermic reaction, educts form a product in the presence of a passing gas. The initial reactor temperature and pressure especially are monitored and logged. The energy balance is then used to calculate the quantity of educt and product. The maximum pressure variation is calculated by monitoring the step-by-step reaction of the remaining educt quantities. The passing-gas pressure is calculated from the maximum pressure variation and the initial gas pressure. The maximum pressure variation is calculated by sub-dividing the quantities of educt and product present into quantities (n, followed by the calculation the change in reactor temperature against the quantities of residual educt and product following a known change in residual educt in an exothermal reaction. Further claimed is a process to monitor and regulate the operation of a blow-down boiler in which the product of the exothermal reaction is held in intermediate storage. The blow-down boiler is monitored online and regulated on the basis of a separate pressure calculation.

公开(公告)号：DE10134023A1

公开(公告)日：2003-01-23

申请号：DE10134023

申请日：2001-07-12

Applicant: BASF AG

Inventor： FUNKHAUSER STEFFEN ,  RICHTER FRAUKE ,  KASTENHUBER WALTER ,  LAPPE ANDREAS ,  KESLER JOCHEN ,  HUEMMER WOLFGANG ,  WILDBURG GERALD

IPC: C08F2/01 ,  C08F2/08 ,  C08F2/22 ,  C08F291/00

Abstract: A 3-step process for preparation of polymer dispersions from monomers by emulsion polymerization involves: (a) addition (sic) of water as inert solvent and dispersion agent; (b) addition of initiator; and (c) addition of part or the whole amount of monomers directly or as an emulsion in the presence of further water and emulsion polymerization at 40-120 deg C is new. A process for preparation of polymer dispersions from monomers from alkyl (meth)acrylates, 1-20C vinyl esters of carboxylic acids, vinylaromatic compounds, nitriles, vinyl halogens, vinylether, 2-8C hydrocarbon with one or two double bonds, or OH group containing monomers by emulsion polymerization at least at 40 deg C in the presence of a radical polymerization initiator. At least 85% of the polymer obtained from one or more of these monomers is prepared in the three steps: (a) addition (sic) of water as inert solvent and dispersion agent; (b) addition of initiator; and (c) addition of part or the whole amount of monomers directly or as an emulsion in the presence of further water and optionally dispersing agent, and emulsion polymerization at 40-120 deg C. Steps (a) to (c) can be individual steps or can be part of a gradient process, and in the individual or all the stages the reaction medium dispersion is fed to the polymerization vessel (2) through an external circuit (10), which has one or more low shear cylinders or membrane pumps (7) and at least one heat exchanger (8) of essentially laminar streaming profile. An Independent claim is included for the apparatus for storage and addition of the reaction and adjuvant materials, a reaction vessel (2), a heating/cooling jacket (3), a device (6) for discharging the vessel (2), an external circuit (10), with one or more low shear supply cylinders or membrane pumps, at least one heat exchanger (8) with a laminar or turbulent profile ,and connecting pipes (20).