Control system for hydrogenation reactions

Claim 2

The system of claim 1 wherein said reactor comprises first and second chambers in series, each containing hydrogenation catalyst, and means to direct the effluent from the first chamber through a heat exchange means before entering said second chamber; and further comprising means to measure the temperature of the feed introduced into the second chamber and establish a seventh signal representative thereof; means to add a reference signal to said fifth signal to establish an eighth signal; second means to compare said seventh and eighth signals and establish a ninth signal representative of any difference therebetween; and means responsive to said ninth signal to regulate said heat exchanger.

Claim 3

The apparatus of claim 3, further comprising selector means adapted to receive two input signals and to transmit the smaller of such signals, means to apply said eighth signal to one of the inputs of said selector means, means to apply a reference signal of predetermined magnitude to the second input of said selector means, and means to apply the output of said selector means to said second means to compare in place of said eighth signal.

Claim 4

The apparatus of claim 1, further comprising means to measure the concentration of a constituent in the fluid mixture which tends to poison the hydrogenation catalyst and establish a seventh signal representative of such concentration, and means to apply said seventh signal to said means to compute to compensate for the catalyst poison present in the feed mixture.

Claim 5

The apparatus of claim 5 wherein said means to compute comprises means to solve the following equations to determine T1: T1 Tpf - K8 Tpf Tave - K7 Delta Tp Delta Tp K5Ai + K6 ACE loge (Ai/Ao) - K1 (Ai/CO) where Ai is said second signal, Ao is said third signal, F is said fourth signal, CO is said seventh signal, T1 is said fifth signal, and the Ks are constants.