1. A subterranean room conduit conveyor assembly comprising a conveyor operatively aligned with a guide assembly, the guide assembly operatively aligned with a subterranean well head.
2. The assembly of claim 1 wherein the guide assembly comprises at least two aligned conduit guides.
3. The assembly of claim 2 wherein the conveyor is aligned between the two guides.
4. The assembly of claim 1 wherein the guide assembly comprises at least one wheel rotatably aligned with the well head.
5. The assembly of claim 4 wherein the wheel further comprises tread about the wheel.
6. The assembly of claim 5 wherein the tread further comprises a trough extending along the tread.
7. A subterranean room conduit conveyor assembly comprising:
a conveyor:
a guide assembly; and
a well head coupling.
8. The assembly of claim 7 wherein the conveyor comprises at least one wheel rotatable about an axis substantially normal to the guide assembly.
9. The assembly of claim 7 wherein the conveyor comprises at least two wheels, the wheels arranged opposing one another along parallel axis, the axis substantially normal to the guide assembly.
10. The assembly of claim 7 wherein conveyor comprises at least one conveyor surface configured to engage conduit, the surface defining a trough therein.
11. The assembly of claim 10 wherein the conveyor further comprises another conveyor surface opposing the one surface.
12. The assembly of claim 11 wherein the other surface defines a complimentary trough.
13. The assembly of claim 11 wherein the other conveyor is biased against the one conveyor.
14. A method for extending conduit from a subterranean room to within a well extending from the room to within the earth surrounding the room, the method comprising:
operatively aligning a conveyor assembly with the well head of the well:
feeding coiled conduit to the conveyor assembly; and
conveying the conduit from the assembly into the well head of the well from the room.
15. The method of claim 14 further comprising vising the conduit between a pair of biased conveyors.
16. The method of claim 14 further comprising extending the conduit through a guide prior is comprised by feeding the coiled conduit to the conveyor assembly.
17. A method for extending conduit from a subterranean room to within a well extending from the room, the method comprising:
providing conduit having nozzle attached thereto:
nozzled end first, extending the conduit into the well; and
projecting fluid from the nozzle to within the well, the projecting conveying the conduit to within the well.
18. The method of claim 17 wherein the projecting the fluid comprises directing the fluid in a direction toward the conduit.
19. The method of claim 17 wherein the projecting the fluid comprises directing the fluid toward the walls of the well.
20. The method of claim 17 wherein the extending is also facilitated by a motorized conveyor.
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 process for the preparation of toluene-diisocyanate, which comprises
a) reacting toluenediamine with phosgene to form crude toluene-diisocyanate,
b) purifying the crude toluene-diisocyanate by distillation to form purified toluene-diisocyanate and a mixture comprising toluene-diisocyanate and the distillation residue of toluene diisocyanate,
c) mixing said mixture comprising toluene-diisocyanate and the distillation residue of toluene diisocyanate continuously with water, and one or more bases which are selected from the group consisting of aqueous sodium hydroxide solution and aqueous potassium hydroxide solution, at a temperature of less than 230\xb0 C. under an absolute pressure of less than 30 bar, and allowing said mixture, water and one or more bases to react under said conditions in one or more tubular reactors connected in series, which are operated without back-mixing, to form toluenediamine,
d) optionally, purifying said toluenediamine formed in step c), and
e) recycling at least a portion of said toluenediamine into the reaction in step a).
2. The process of claim 1, in which said mixture comprising toluene-diisocyanate and the distillation residue of toluene-diisocyanate which is formed in step b) comprises from 10 to 90% by weight of toluene-diisocyanate, based on 100% by weight of the mixture.
3. The process of claim 1, in which said mixture comprising toluene-diisocyanate and the distillation residue of toluene-diisocyanate and said water are mixed in the weight ratio of from 0.1:1 to 1:1.
4. The process of claim 1, in which said mixture comprising toluene-diisocyanate and the distillation residue of toluene-diisocyanate additionally comprises chlorine in the form of one or more chlorinated inorganic compounds andor one or more organic compounds, and said bases are employed in a stoichiometric excess with respect to the chlorine.
5. The process of claim 1, in which step c) forms a reaction mixture comprising water, toluenediamine, hydrolysis residue and, optionally, chloride salt, and in which said reaction mixture emerging from the one tubular reactor or from the last of the tubular reactors connected in series is first expanded, thereby forming a liquid hydrolysis mixture and a gas mixture.
6. The process of claim 5, additionally comprising distilling said liquid hydrolysis mixture to yield said toluenediamine.
7. The process of claim 6, in which said distillation is vacuum distillation.
8. The process of claim 6, additionally comprising distilling said liquid hydrolysis mixture to first remove the water, and further distilling to yield said toluenediamine.
9. The process of claim 7, additionally comprising recycling said water which is removed from the liquid hydrolysis mixture by distillation into step c).
10. The process of claim 6, in which the distillation of said liquid hydrolysis mixture additionally forms a mixture comprising toluenediamine and hydrolysis residue, and feeding said mixture comprising toluenediamine and hydrolysis residue, together with any residues containing toluenediamine which are formed in the catalytic hydrogenation of dinitrotoluene to toluenediamine, andor by the working up by distillation, andor with o-toluenediamine, to a common thermal utilization.