1. A process for producing a polycarbonate, comprising:
reacting an aqueous alkali solution of a dihydric phenol with phosgene in the presence of an organic solvent to obtain a polycarbonate oligomer; and
polycondensing the polycarbonate oligomer;
wherein:
reacting the dihydric phenol with phosgene yields an emulsion solution of a polycarbonate oligomer-containing organic solvent;
the emulsion solution is subjected to separation in a coalescer to separate the emulsion solution into a polycarbonate oligomer-containing organic solvent phase and an aqueous phase; and
polycondensing the polycarbonate oligomer comprises polycondensing polycarbonate oligomer in the polycarbonate oligomer-containing organic solvent phase.
2. The process of claim 1, wherein:
the polycarbonate oligomer-containing organic solvent phase obtained by separation of the emulsion solution in the coalescer is subjected to separation in a tank for still standing separation; and
polycondensing the polycarbonate oligomer comprises polycondensing polycarbonate oligomer in a polycarbonate oligomer-containing organic solvent phase obtained by separation in the tank for still standing separation.
3. The process for producing a polycarbonate as defined in claim 1, wherein the coalescer comprises mounted elements that enhance coalescence of the polycarbonate oligomer-containing organic solvent phase.
4. The process of claim 3, wherein the elements comprise at least one member selected from the group consisting of glass fibers, carbon fibers, metal fibers, synthetic resin fibers, organic fibers and porous materials.
5. The process of claim 3, wherein the elements comprise at least one member selected from the group consisting of flat-shaped elements, cylindrical-shaped elements and pleat-shaped elements.
6. The process of claim 3, wherein the coalescer operates at a pressure difference of from 0.001 to 1.0 MPa.
7. The process of claim 1, wherein the coalescer operates to accelerate uniting of liquid particles of the disperse phase of the emulsion solution.
8. The process of claim 1, wherein separation of the polycarbonate oligomer-containing organic solvent phase and the aqueous phase of the emulsion solution takes place in a housing of the coalescer.
9. The process of claim 8, wherein an interface between the polycarbonate oligomer-containing organic solvent phase and the aqueous phase of the emulsion solution is not present in the housing of the coalescer during separation.
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. An apparatus for storing a device for a railway vehicle comprising:
a storage case having an opening at a front side;
a tray accommodated into the storage case, the tray being movable forward and backward with the device mounted thereon;
a lever disposed at the tray to extend along a forward and backward direction, the lever being vertically pivotable around a pivot located forward relative to a center of the tray in the forward and backward direction;
an operation member coupled to a front end portion of the lever and disposed at a front side of the tray;
an engagement portion provided at a rear end portion of the lever and protruding downward outside the tray; and
a recess provided in the storage case, the engagement portion being fitted into the recess from above.
2. The apparatus for storing the device for the railway vehicle according to claim 1, wherein the recess is positioned such that the engagement portion is fitted into the recess from above at least in a state where the tray is in a storage position where the tray is accommodated into the storage case.
3. The apparatus for storing the device for the railway vehicle according to claim 1, wherein the recess is positioned such that the engagement portion is fitted into the recess from above at least in a state where the tray is in an intermediate position in a moving range of the tray.
4. The apparatus for storing the device for the railway vehicle according to claim 1, wherein the recess is positioned such that the engagement portion is fitted into the recess from above at least in a state where the tray is in a pull-out position where the tray is pulled out through the opening and an entire of a device region of the tray is outside the storage case.
5. The apparatus for storing the device for the railway vehicle according to claim 1,
wherein the storage case includes an elongate member extending in the forward and backward direction at an upper side of a bottom wall of the storage case and at a lower side of the tray and having an upper end extending in a substantially straight-line shape in the forward and backward direction; and
the recess extends in a downward direction from the upper end of the elongate member.
6. The apparatus for storing the device for the railway vehicle according to claim 5,
wherein the storage case includes a rear wall, a front wall having the opening; and
a rear end of the elongate member is fixed to the rear wall and a front end of the elongate member is fixed to the front wall.
7. The apparatus for storing the device for the railway vehicle according to claim 1, further comprising:
a stopper provided at the tray to inhibit the lever from moving in an upward direction in a state where a rear end portion of the lever is pivoted in the upward direction and the engagement portion disengages from the recess.
8. The apparatus for storing the device for the railway vehicle according to claim 7, wherein
the tray includes a rear plate having an insertion hole into which the rear end portion of the lever is inserted; and
the stopper is fixed to the rear plate around the insertion hole.
9. The apparatus for storing the device for the railway vehicle according to claim 1, wherein
the device is a battery; and
the lever includes a plurality of levers to sandwich at least one battery region between them, and front end portions of the plurality of levers are coupled to one operation member.
10. The apparatus for storing the device for the railway vehicle according to claim 1, wherein
the device is a battery;
the tray has battery regions in which batteries of plural rows are mounted;
the battery regions are defined in such a manner that plural battery groups each including the batteries of two rows or less are arranged with a visual space between them; and
the lever is disposed in the visual space.