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AssigneeCovestro Deutschland AG
InventorsBernd Pennemann, Erwin Dieterich, Heinz-Josef Hamacher
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A method for continuously producing a product (A1) by way of at least two coupled-together chemical reactions (C1, C2), wherein at least two input substances (E1, E2) are fed to a first chemical reaction (C1), wherein a plurality of intermediate substances (Z1, Z2) are produced from the input substances (E1, E2) by the first chemical reaction (C1), wherein at least one of the intermediate substances (Z2) is fed to a second chemical reaction (C2), wherein the at least one fed intermediate substance (Z2) is further processed by the second chemical reaction (C2), in particular using at least one further substance (W1, W2) in a second chemical reaction (C2) to form a plurality of output substances (A1, A2), that is to say to form the chemical product (A1) and at least one further output substance (A2), wherein the flow rates (Fi) of the fed substances (E1, E2, Z1, W1, W2, A2) that are fed to one of the reactions (C1, C2) are set by a respective actuating element (VE1, VE2, VW1, VW 2, VZ 2, VA1), wherein each of the fed substances is assigned a separate actuating element, wherein a manipulated variable (SE2,R, Si,R) that is stipulated by a controller (RE2, Ri) is respectively applied to at least one of the actuating elements, wherein, for changing the production rate of the chemical product (A1), a temporary manipulated variable (SE2,temp, Si,temp) is respectively applied during a transient phase (II, III) to at least one of these actuating elements (VE2, Vi) instead of the manipulated variables (SE2,R, Si,R) stipulated by the respective controllers (RE2, Ri), wherein the temporary manipulated variable (SE2,temp, Si,temp) or the temporary manipulated variables is/are generated by at least one control unit (SE) in dependence on a default value (NV).
A process for the continuous production of a product (A1) via at least two coupled chemical reactions (C1, C2), comprising feeding at least two starting materials (E1, E2) to a first chemical reaction (C1) thereby producing a plurality of intermediates (Z1, Z2) from the starting materials (E1, E2) by the first chemical reaction (C1), feeding at least one of the intermediates (Z2) to a second chemical reaction (C2) and further reacting the at least one introduced intermediate (Z2) in the second chemical reaction (C2), with at least one further material (W1, W2) to form a plurality of output materials (A1, A2) in which (A1) is a chemical product and (A2) is at least one further output material wherein the flow rates (Fi) of the introduced materials (E1, E2, Z1, W1, W2, A2) which are fed to one of the chemical reactions (C1, C2) are set by a respective regulating device (VE1, VE2, VW1, VW2, VZ2, VA1), with a separate regulating device being assigned to each of the introduced materials fed in and at least one of the regulating devices being supplied in each case with a control variable (SE2,R, SI,R) prescribed by a regulator (RE2, RI), wherein at least one of these regulating devices (VE2, VI) is supplied during a settling-down phase (II, III) in each case with a temporary control variable (SE2,temp, SI,temp) instead of the control variables (SE2,R, SI,R) prescribed by the respective regulators (RE2, RI) thereby changing the production rate of the chemical product (A1), in which the temporary control variable (SE2,temp, SI,temp) or the temporary control variables are generated as a function of a prescribed value (NV) from at least one control unit (SE).
Dependencies are inferred from the claim text.