Method for optimizing hydrogen fluoride alxylation and increasing process safety
AssigneeTexaco Inc.
InventorsKenneth Roy Comey, III, Gerald Verdell Nelson
Life of this patent
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Abstract
A method of regulating the concentration of onium in a liquid onium poly(hydrogen fluoride) composition utilized in a hydrogen fluoride catalyzed alkylation reaction for a given level of total airborne hydrogen fluoride is disclosed. Also disclosed is a method of regulating the concentration of onium in the liquid onium poly(hydrogen fluoride) composition for a given level of RON. In one embodiment, the liquid onium poly(hydrogen fluoride composition is a mixture including pyridine and anhydrous hydrogen fluoride so as to give a pyridine poly(hydrogen fluoride) composition that is useful as a catalyst in the hydrogen fluoride catalyzed alkylation reaction.
Claims15
A method of regulating the concentration of onium in a liquid onium poly(hydrogen fluoride) composition utilized in a hydrogen fluoride catalyzed alkylation reaction for a given level of total airborne hydrogen fluoride reduction comprising:
- determining an ambient temperature value;
- measuring an alkylation reaction temperature value;
- measuring an alkylation reaction pressure value;
- measuring a concentration value of the onium in the liquid onium poly(hydrogen fluoride) composition utilized in the alkylation reaction;
- calculating a target concentration value of onium using the following equation
- C=a+bH+cT.sub.r +dP+eT.sub.a +fHT.sub.r +gHP+hHT.sub.a +iT.sub.a P+jT.sub.r T.sub.a +kPT.sub.a +lH.sup.2 +mT.sub.r.sup.2 +nP.sup.2 +oT.sub.a.sup.2
- wherein:
- C is the target concentration value of onium in mass fraction;
- H is the total airborne hydrogen fluoride reduction in weight percent;
- T.sub.a is the ambient temperature value in degrees Kelvin;
- T.sub.r is the alkylation reaction temperature value in degrees Kelvin;
- P is the alkylation reaction pressure value in kiloPascals;
- a=109.99073;
- b=-0.27626;
- c=-1.38790;
- d=-0.03703;
- e=0.81024;
- f=0.00283;
- g=0.00014;
- h=-0.00238;
- i=0.00014;
- j=-0.00094;
- k=-0.00005;
- l=0.00038;
- m=0.00130;
- n=1.5.times.10.sup.-6 ;
- and, o=-0.00143, and
- adjusting the concentration of onium in the liquid onium poly(hydrogen fluoride) composition used in the alkylation reaction to approximate the target concentration value.
A method of regulating the concentration of onium in a liquid onium poly(hydrogen fluoride) composition utilized in a hydrogen fluoride catalyzed alkylation reaction for a given value of RON in the hydrocarbon product comprising:
- measuring an alkylation reactor temperature value;
- measuring a concentration value of the onium in the liquid onium poly(hydrogen fluoride) composition utilized in the alkylation reaction;
- calculating a target value of concentration of the onium in the liquid onium poly(hydrogen fluoride) composition utilized in the alkylation reaction using the equation
- C=a'+b'R+c'T.sub.r +d'RT.sub.r +e'R.sup.2 +fT.sub.r.sup.2
- wherein C is the target concentration value of onium in mass fraction;
- R is the RON value of the hydrocarbon alkylate product;
- T.sub.r is the alkylation reaction temperature value;
- a'=-84.11875056;
- b'=1.227443844;
- c'=0.196482957;
- d'=-0.001032704;
- e'=-0.005143374;
- f'=-0.000172411;
- and,
- adjusting the concentration value of onium in the liquid onium poly(hydrogen fluoride) composition utilized in the alkylation reaction to approximate the target value.
A method of regulating the concentration of pyridine in a liquid pyridinium poly(hydrogen fluoride) composition utilized in a hydrogen fluoride catalyzed alkylation reaction for a given level of total airborne hydrogen fluoride reduction comprising:
- determining an ambient temperature value;
- measuring an alkylation reaction temperature value;
- measuring an alkylation reaction pressure value;
- measuring a concentration value of the pyridine in the liquid pyridinium poly(hydrogen fluoride) composition utilized in the alkylation reaction;
- calculating a target concentration value of pyridine using the following equation
- C=a+bH+cT.sub.r +dP+eT.sub.a +fHT.sub.r +gHP+hHT.sub.a +iT.sub.a P+jT.sub.r T.sub.a +kPT.sub.a +lH.sup.2 +mT.sub.r.sup.2 +nP.sup.2 +oT.sub.a.sup.2
- wherein:
- C is the target concentration value of pyridine in mass fraction;
- H is the total airborne hydrogen fluoride reduction in weight percent;
- T.sub.a is the ambient temperature value in degrees Kelvin;
- T.sub.r is the alkylation reaction temperature value in degrees Kelvin;
- P is the alkylation reaction pressure value in kiloPascals;
- a=109.99073;
- b=-0.27626;
- c=-1.38790;
- d=-0.03703;
- e=0.81024;
- f=0.00283;
- g=0.00014;
- h=-0.00238;
- i=0.00014;
- j=-0.00094;
- k=-0.00005;
- l=0.00038;
- m=0.00130;
- n=1.5.times.10.sup.-6 ;
- and, o=-0.00143
- comparing the target concentration value with the measured concentration value and,
- adjusting the concentration of pyridine in the liquid pyridinium poly(hydrogen fluoride) composition used in the alkylation reaction to approximate the target concentration value.
A method of regulating the concentration of pyridine in a liquid pyridinium poly(hydrogen fluoride) composition utilized in a hydrogen fluoride catalyzed alkylation reaction for a given value of RON in the hydrocarbon product comprising:
- measuring an alkylation reactor temperature value;
- measuring a concentration value of the pyridine in the liquid pyridinium poly(hydrogen fluoride) composition utilized in the alkylation reaction;
- calculating a target value of concentration of the pyridine in the liquid pyridinium poly(hydrogen fluoride) composition utilized in the alkylation reaction using the equation
- C=a'+b'R+c'T.sub.r +d'RT.sub.r +e'R.sup.2 +fT.sub.r.sup.2
- wherein C is the target concentration value of pyridine in mass fraction;
- R is the RON value of the hydrocarbon alkylate product;
- T.sub.r is the alkylation reaction temperature value in degrees Kelvin;
- a'=-84.11875056;
- b'=1.227443844;
- c'=0.196482957;
- d'=-0.001032704;
- e'=-0.005143374;
- f'=-0.000172411;
- and,
- adjusting the concentration value of pyridine in the liquid pyridinium poly(hydrogen fluoride) composition utilized in the alkylation reaction to approximate the target value.
Dependencies are inferred from the claim text.