What is claimed is:
1. An aqueous fluorescent ink for ink jet recording comprising
an emulsified resin colored with a fluorescent dye, and
a water-soluble compound being solid at 25 C. and having ethylene oxide units.
2. The ink of claim 1, wherein the resin is an acrylic resin.
3. The ink of claim 1, wherein the water-soluble compound is contained at 1 to 15% by weight of the total weight of the ink.
4. The ink of claim 1, wherein the water-soluble compound is a polyethylene glycol.
5. The ink of claim 4, wherein the polyethylene glycol has 25 or more of ethylene oxide units.
6. The ink of claim 4, wherein the ink contains the polyethylene glycol at 1 to 10% by weight of the total weight of the ink.
7. The ink of claim 1, wherein the water-soluble compound is a nonionic surfactant.
8. The ink of claim 7, wherein the nonionic surfactant has 25 or more of ethylene oxide units.
9. The ink of claim 7 or 8, wherein the nonionic surfactant is contained at 1 to 5% by weight of the total weight of the ink.
10. The ink of claim 1, wherein the water-soluble compound is a polyethylene glycol and a nonionic surfactant.
11. A recording unit comprising an ink container storing an aqueous fluorescent ink as set forth in claim 1 and an ink jet head for discharging the ink.
12. An ink cartridge storing an aqueous fluorescent ink as set forth in any one of claims 1 to 10.
13. An ink jet recording apparatus comprising an ink container storing an aqueous fluorescent ink as set forth in claim 1 and an ink jet head for discharging the ink.
14. The ink jet recording apparatus of claim 13, wherein the ink jet head is a thermal ink jet head.
15. An ink jet recording method comprising the step of discharging an aqueous fluorescent ink as set forth in claim 1 by an ink jet method.
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 chemical stabilization of a uranium carbide compound corresponding to the formula:
UCx+yC with x\u22671 and y>0, x and y being true numbers, placed in a stabilization chamber, comprising the following stages:
a stage of rise in temperature of the internal temperature of said chamber to a temperature for \u201coxidation\u201d of said compound based on uranium carbide of between approximately 380\xb0 C. and 550\xb0 C., said chamber being fed with an inert gas;
a stage of isothermal oxidative treatment at said oxidation temperature, said chamber being placed under O2 partial pressure; and
a stage of controlling the completion of the stabilization of said compound which comprises the monitoring of the amount of molecular oxygen consumed andor of carbon dioxide given off or of carbon dioxide and carbon monoxide given off, until at least the achievement of a value of an input set point for the molecular oxygen, of a minimum threshold value for said amount of carbon dioxide or of threshold values for the carbon dioxide and carbon monoxide.
2. The process for the chemical stabilization of a uranium carbide compound as claimed in claim 1, wherein the stage of controlling the completion of the stabilization additionally comprises the monitoring of variation in weight of the solid compounds based on carbon and uranium in the chamber, an increase in weight being correlated with the oxidation of uranium carbide in progress.
3. The process for the chemical stabilization of a uranium carbide compound as claimed in claim 1, wherein stage of controlling the completion of the stabilization is carried out with the application of a rise in temperature of the internal temperature of said chamber between said oxidation temperature and the temperature of oxidation of the carbon, said temperature being excluded from the interval, and monitoring the presence of CO2 given off.
4. The process for the chemical stabilization of a uranium carbide compound as claimed in claim 1, comprising the introduction of a water vapor partial pressure into said chamber before andor during andor after the oxidation stage.
5. The process for the chemical stabilization of a uranium carbide compound as claimed in claim 4, wherein the stage of controlling and completing the stabilization comprises the detection of H2 as marker for monitoring the end of oxidation in said chamber.
6. The process for the chemical stabilization of a uranium carbide compound as claimed in claim 2, wherein the stage of controlling the completion of the stabilization comprises an operation of overpressurizing the reaction gases present in said chamber so as to accelerate the end of the reaction for the oxidation of said compound.
7. The process for the chemical stabilization of a uranium carbide compound as claimed in claim 6, wherein the stage of controlling the completion of the stabilization additionally comprises a cycle of an operation of overpressurizing and an operation of underpressurizing the reaction gases present in said chamber.
8. The process for the chemical stabilization of a uranium carbide compound as claimed in claim 2, in which said compound exhibits a morphology of powder type or of porous or dense pellet type.
9. The process for the chemical stabilization of a uranium carbide compound as claimed in claim 2, comprising a preliminary stage of determination of an optimum oxidation temperature by thermogravimetric analysis of a sample of UCx+yC compound.
10. The process for the chemical stabilization of a uranium carbide compound as claimed in claim 9, wherein the optimum oxidation temperature, which varies as a function of the conditioning of said uranium carbide, is between approximately 380\xb0 C. and 550\xb0 C.
11. A device for the chemical stabilization of a uranium carbide compound comprising a chamber comprising an oxidation furnace (B3) and implementing the process as claimed in claim 2, comprising:
a module for feeding with gas (B1) which makes it possible to generate neutral argon or nitrogen atmospheres or else atmospheres partially oxidizing in O2 andor H2O using an external feed circuit, gas flows being sent to said oxidation furnace;
an electrical feed module (B2) feeding the oxidation furnace, sending to it a temperature set-point flow;
said chamber sending an exiting gas flow to a module for regulation and automatic control (B4);
said module for regulation and automatic control comprising a first module for measurement of temperature and thermal power (B41) and a second module for analyzing the various amounts of gas (B42) present in the oxidation furnace, transmitting a set-point flow to said means for feeding with gas and to said electrical feed means.
12. The device for the chemical stabilization of a uranium carbide compound as claimed in claim 11, wherein the module for feeding with gas (B1) comprises a circuit which generates water vapor (B11), coupled to a regulator of water vapor pressure (B14), an argonnitrogen feed (B12), an argonmolecular oxygen feed (B13), coupled to a regulator of molecular oxygen pressure (B15).
13. The device for the chemical stabilization of a uranium carbide compound as claimed in claim 11, wherein said chamber is equipped with means for weighing the solid compounds based on carbon and uranium.