1. A system for manufacturing a food product, the system comprising:
at least one heat exchanger comprising a heating medium;
at least one food product tank;
piping connecting the food product tank to the heat exchanger;
at least one steam source having a steam valve;
a computer having a computer processor; and
a computer-readable medium accessible to the computer and containing a software program therein that is programmed to cause the computer processor to automatically control the steam valve to move from a first position to a second, calculated position to maintain a temperature of the heating medium that is sufficient to maintain sterility of the food product during a recirculating water-to-food product transition in the heat exchanger, and wherein the steam valve is configured to return to the first position from the second position to prevent a sudden food product temperature increase as the food product completely displaces the recirculating water in the heat exchanger.
2. The system according to claim 1, further comprising a second heat exchanger and piping connecting the heat exchanger to the second heat exchanger.
3. The system according to claim 1, wherein the steam source is connected to a heating medium heater such that the steam source is configured to provide steam to the heating medium heater to heat the heating medium.
4. The system according to claim 1, wherein the software program is programmed to cause the computer processor to open a valve of the food product tank to initiate control of the system to begin a manufacturing process to manufacture the food product.
5. The system according to claim 1, wherein the software program is programmed to cause the computer processor to calculate a residence time of a recirculating waterproduct interface at a predetermined location within the system.
6. The system according to claim 1, wherein the software program is programmed to set a control variable to zero, wherein the control variable is selected from the group consisting of
(i) a one-time temperature measurement of heating medium discharged from the heat exchanger before a recirculating waterfood product interface reaches the heat exchanger (\u201cTs\u201d),
(ii) a value indicative of a degree of difficulty in heating the food product (\u201cDDV\u201d),
(iii) an intermediate temperature value that is equal to a maximum measured temperature of a discharged heating medium (\u201cITV\u201d),
(iv) a value indicative of an increment to the steam valve position necessary to address a temperature upset caused by a waterproduct separation (\u201cISVL\u201d), and
(v) combinations thereof.
7. The system according to claim 1, wherein the software program is programmed to cause the computer processor to continuously calculate a rolling average temperature of heating medium discharged from the heat exchanger before a recirculating waterfood product interface reaches the heat exchanger (\u201cTave\u201d).
8. The system according to claim 1, wherein the software program is programmed to cause the computer processor to calculate a first timing constant that is representative of an optimal time in the manufacturing process to calculate a degree of difficulty (\u201cDDV\u201d) in heating the food product in the heat exchanger.
9. The system according to claim 1, wherein the software program is programmed to cause the computer processor to measure and store a temperature of heating medium discharged from the heat exchanger before a recirculating waterfood product interface reaches the heat exchanger (\u201cTs\u201d), wherein the temperature is stored at the optimal time in the manufacturing process to calculate a degree of difficulty (\u201cDDV\u201d) in heating the food product in the heat exchanger.
10. The system according to claim 1, wherein the software program is programmed to cause the computer processor to calculate a rate of change of a temperature of the heating medium discharged from the heat exchanger as the food product travels through the heat exchanger (\u201cSlope\u201d).
11. The system according to claim 1, wherein the software program is programmed to cause the computer processor to calculate an intermediate temperature value (\u201cITV\u201d) according to the formula:
((highest value of a media discharge temperature as a waterproduct interface passes through the heat exchanger from a first predetermined time to a second predetermined time)\u2212(Ts)), if >0; or\u2003\u2003(i)
0, if ((highest value of a media discharge temperature as a waterproduct interface passes through the heat exchanger from a first predetermined time to a second predetermined time)\u2212(Ts))<0.\u2003\u2003(ii)
12. The system according to claim 11, wherein the first predetermined time is the optimal time in the manufacturing process to calculate a degree of difficulty (\u201cDDV\u201d) in heating the food product in the heat exchanger.
13. The system according to claim 11, wherein the second predetermined time is an optimal time in the manufacturing process to move the steam valve from the second position back to the first position.
14. The system according to claim 11, wherein the software program is programmed to cause the computer processor to calculate the degree of difficulty in heating the food product in the heat exchanger (\u201cDDV\u201d), wherein DDV is calculated as DDV=ITV*Slope Tuned.
15. The system according to claim 1, wherein the software program is programmed to cause the computer processor to calculate a second timing constant that is representative of an optimal time in the manufacturing process to move the steam valve from the first position to the second position.
16. The system according to claim 1, wherein the software program is programmed to cause the computer processor to calculate a minimum incremental to a steam valve position that is necessary to address any upset caused by a waterfood product separation (\u201cISVLmin\u201d).
17. The system according to claim 16, wherein the software program is programmed to cause the computer processor to calculate an incremental to a steam valve position (\u201cISVL\u201d), which is calculated as ISVL=((flow rate of product through the system\xf7flow rate of product when tuning constants are set)*ISVLmin)+DDV.
18. The system according to claim 17, wherein the software program is programmed to cause the computer processor to calculate the second position of the steam valve (\u201cCVP\u201d), which is calculated as CVP=(the first position of the steam valve)+ISVL.
19. The system according to claim 15, wherein the software program is programmed to cause the computer processor to calculate a third timing constant that is representative of an optimal time in the manufacturing process to move the steam valve from the second position to the first position.
20. The system according to claim 19, wherein the software program is programmed to cause the computer processor to calculate a fourth timing constant that is representative of an optimal time in the manufacturing process to move the steam valve from the second position to a standard control position.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A modified cyclic aliphatic polyamine represented by the following formula:
R1R2N\u2014R\u2032\u2014NR3R4
wherein R1 to R4 represent, each independently, a hydrogen atom or an alkenyl compound residue selected from the group consisting of styrene residue and divinylbenzene residue, which are represented by the following formulae:
wherein at least one of R1 to R4 represents the alkenyl compound residue, and
>N\u2014R\u2032\u2014N< represents a cyclic aliphatic polyamine residue selected from the group consisting of menthanediamine residue, isophoronediamine residue, diaminodicyclohexylmethane residue, bis(4-amino-3-methylcyclohexyl)methane residue, N-aminomethylpiperazine residue, norbornanediamine residue, polycyclohexylpolyamine residue, and bis(aminomethyl)tricyclodecane residue, which are represented by the following formulae:
wherein said modified cyclic aliphatic polyamine is not represented by any of the following formulae:
2. The modified cyclic aliphatic polyamine according to claim 1, wherein the cyclic aliphatic polyamine residue is at least one member selected from the group consisting of isophoronediamine residue and norbornanediamine residue.
3. The modified cyclic aliphatic polyamine according to claim 1, wherein the alkenyl compound residue is styrene residue.
4. The modified cyclic aliphatic polyamine according to claim 2, wherein the alkenyl compound residue is styrene residue.
5. The modified cyclic aliphatic polyamine according to claim 1, wherein the cyclic aliphatic polyamine residue is modified by the alkenyl compound residue at a modification ratio in a range wherein the number of active hydrogen atoms derived from the amino groups of the cyclic aliphatic polyamine after modification is more than one.
6. A process for preparing a modified cyclic aliphatic polyamine represented by the following formula:
R1R2N\u2014R\u2032\u2014NR3R4
wherein R1 to R4 represent, each independently, a hydrogen atom or an alkenyl compound residue selected from the group consisting of styrene residue and divinylbenzene residue, which are represented by the following formulae:
wherein at least one of R1 to R4 represents the alkenyl compound residue, and
>N\u2014R\u2032\u2014N< represents a cyclic aliphatic polyamine residue selected from the group consisting of menthanediamine residue, isophoronediamine residue, diaminodicyclohexylmethane residue, bis(4-amino-3-methylcyclohexyl)methane residue, N-aminomethylpiperazine residue, norbomanediamine residue, polycyclohexylpolyamine residue, and bis(aminomethyl)tricyclodecane residue, which are represented by the following formulae:
comprising subjecting the cyclic aliphatic polyamine residue and the alkenyl compound residue to addition reaction.
7. The process for preparing a modified cyclic aliphatic polyamine according to claim 6, wherein the cyclic aliphatic polyamine residue is at least one member selected from the group consisting of isophoronediamine residue and norbomanediamine residue.
8. The process for preparing a modified cyclic aliphatic polyamine according to claim 6, wherein the alkenyl compound residue is styrene residue.
9. The process for preparing a modified cyclic aliphatic polyamine according to claim 7, wherein the alkenyl compound residue is styrene residue.
10. The process for preparing a modified cyclic aliphatic polyamine according to claim 6, wherein the cyclic aliphatic polyamine residue is modified by the alkenyl compound residue at a modification ratio in a range wherein the number of active hydrogen atoms derived from the amino groups of the cyclic aliphatic polyamine after modification is more than one.