JPS5834028A - Pressure dissolving container - Google Patents

Abstract

PURPOSE:To prevent the adhesion of liquid droplets of a condensate to the inner wall of a container, by a method wherein the bottom part of the inner container of the pressure dissolving container is adjusted to an equal thickness and a cooling body is formed into a shape fitted with the outer shape of said bottom part. CONSTITUTION:In a pressure dissolving container for heating and dissolving a sample to be analyzed, the wall thickness of the bottom surface of an inner container 2 is made equal or the bottom part thereof is made thinner than the side wall part thereof as well as a cooling body 5 is formed into a shape fitted with the outer shape of the inner container 2. By this structure, the temp. of the inner wall surface of the inner container 2 is effectively made lower than that of the bottom part while the temp. of the side wall part is gradually lowered toward the bottom part of the inner container 2 from the side of an inner lid 3 and, therefore, condensation to the side wall part is positively prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pressurized dissolution container, and more particularly, to a pressurized dissolution container capable of preventing condensed droplets from adhering to the inner wall of the container in which a sample for 4IVC analysis or the like is heated and dissolved.

Generally, when dissolving a sample substance with a low successive layer rate, a double-structure pressurized dissolution vessel is used. This container S incorporates a round corner container made of a corrosion-resistant material such as Teflon on the circular side of an outer container made of a pressure-resistant material such as stainless steel, and the inner container is placed over the opening of the inner container. pressure resistant outside I
It was designed so that it could be covered. When dissolving a sample, put the sample and solution into the inner container, cover with the inner lid, and then cover with a pressure-resistant outer lid.Then, put it in a dry oven and heat it, and the sample will be dissolved by the action of the solution. Dissolve in the container. Furthermore, the container is cooled from the bottom of the inner container through a cooling body by water cooling or air cooling to rapidly cool the solution, and the evaporated vapor existing in the space inside the pressurized dissolution container is selectively condensed on the surface of the solution.

At this time, in a pressurized melting container with a conventional cooling body, the bottom of the inner container is sloped to facilitate suction of the solution, and the bottom of the inner container is slanted to make it easier to suck the solution, and the bottom part of the inner container is shaped like a cone instead of a spherical one. The outer shape of the vessel is cylindrical with a flat bottom to fit the outer container. For this reason, the cooling effect through the cooling plate cannot be uniformly transmitted due to the difference in wall thickness of the inner container, and the bottom of the inner container cannot necessarily be cooled faster than the side wall of the inner container. Therefore, there was a problem in that condensed droplets were generated on a part of the side wall of the inner container.

It is an object of the present invention to provide a pressurized melting solution that eliminates the drawbacks of the conventional pressurized melting container described above and prevents the evaporated vapor of the melting liquid from condensing and adhering to the inner container 11 [1i]. The goal is to provide a container.

An embodiment of the pressurized melting container according to the present invention vsK will be described below with reference to the drawings. A conventional pressurized melting container having a cooling body is shown in FIG.

In FIG. 1, reference numeral 1 indicates an outer container, and this outer container I
The crucible is made into a cylindrical crucible using a pressure-resistant material such as stainless steel in order to withstand the increase in internal pressure of Fi, and a circular hole of 1 m is bored in the bottom of the crucible. An inner container 2 for containing the sample and solution is incorporated inside the outer container 1,
The inner container 2 is made of a corrosion-resistant material, such as Teflon, so as not to be corroded by the solution. A flange 2a is formed at the upper end of the inner container 2, and this flange 2a is placed on the upper surface of the outer container 1 for discussion. In this state,
A gap pjJ is formed between the bottom lower surface of the inner container 2 and the bottom bottom surface of the outer container 1, while a slight gap is formed in the radial direction between the outer container 1 and the inner container 2.

9. The upper opening of the inner container 2 is closed by the inner #i3, and when the inner lid 3 is pressed from above, the inner lid 3 comes into close contact with the upper surface of the 7 langes 2a of the inner container, so that the inner container 2 can be sealed. Become and strengthen.

Further, the upper part of the outer container 1 is covered with an outer cover 4, and this outer cover 4tf is preferably made of stainless steel.
It is attached by screwing the female threaded portion 4a to the male threaded portion 1b of the outer container. By screwing the outer lid 411 to the outer container 1 in this manner, the seven langes 2a and the inner lid 3 can be brought into close contact with the outer container 1.

A cooling body 5 is incorporated in the gap between the upper surface of the bottom of the outer container 1 and the lower surface of the bottom of the inner container 2. It is composed of a plate-shaped cooling plate 5a and a heat conduction portion 5b integrally extending downward from the center of the cooling plate 5a. A heat sink 6 is coupled to the lower end of the heat conduction section 5b of the cooling body 5, and thin disc-shaped heat dissipation fins 6b, 6c, 6d, etc. are arranged around the cylindrical core 6a of the heat sink 6#1. It was installed with pitch included.

To dissolve a sample using the above-mentioned pressurized dissolution volume tht, first place the solid sample 7 and 1lIIlN in the inner container 2.
4-liquid 8-karat gold case, contents I! The opening of 2 is covered with the inner lid 3, and the female threaded part 4at of the outer container 1 and the male threaded part tm of the outer container 1,
Connect and tighten the two screws.

At this time, the inner lid 3 is pressed downward by the outer lid 4 made of stainless steel. Since both the inner container 1i3 and the inner container @2 are made of elastic Tetron, the inner lid 3 is similar to the inner container 2.
The inner container is in close contact with the flange portion 2a, and the inner container remains in a sealed state, and the lower surface of the bottom of the inner container 2 is in close contact with the upper surface of the cooling plate 5a. If the entire container is heated in a dry open state in this state, the dissolved liquid evaporates as the liquid temperature rises, forming an equilibrium vapor phase in the sealed chamber 9 determined by the temperature. After the predetermined melting period of 1 m has been completed, the entire container is left indoors and cooled in the air, or only the heat sink 6 is cooled with cold water. In this case, the effect of the difference in heat conduction wheels between stainless steel, which is the material of the external passenger unit l, and aluminum, which is the material of the cooling body 5 and the heat radiating body 6, and the radiation fins 6b, 6c, and 6d, which have a large heat radiation area to the outside air. As a result, the bottom of the inner container 2 and the solution 8 are rapidly cooled, and the temperature of the solution 8 becomes lower than the temperature of the internal imm surface of the inner container 2 and the surface of the inner lid 30F. Condensation of vapor in 9 takes priority over other solutions
Happens on the surface.

However, since the inner container 2 is cooled from the plane that is in contact with the flat cooling body 5, and the inner wall has a sloped bottom, for example, a round bottom, there is a partially thickened portion 2b, and the inner container 2 The cooling effect may not be transmitted uniformly due to the heat retention effect of the material. For this reason, condensed droplets are generated on the side wall surface of the inner container 2, which has a reduced wall thickness, in a portion close to the cooling body 5.

FIG. 2 shows an embodiment of the invention. In FIG. 2, the inner container 2 has a structure with a sloped bottom surface, for example, a conical shape, and the wall thickness of the inner container 2 is uniform or the thickness of the bottom part is thinner than that of the item part. Further, the cooling body 5 has a shape that matches the outer shape of the inner container 2, and prevents the inner container 2 from deforming or bursting due to an increase in pressure inside the inner container 2.

When cooling the pressurized melting container with the above structure, the inner container 2
There is a theory as to whether the wall thickness of the inner container 20 is uniform or not.The bottom wall thickness is thinner than the side wall wall thickness. The distribution becomes gradually lower from the side toward the bottom of the inner container 2.

Therefore, the temperature distribution inside the content Wh2 during cooling becomes even, and condensation on the side wall can be more reliably prevented.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional pressurized melting container having a cooling body, and FIG. 2 is a sectional view showing an embodiment of the pressurized melting container according to the present invention. 1.Outer container 2.Inner container 3.Inner lid 4.
・Outer lid 5... Cooling body 6... Heat sink 7...
・Sample 8... Molten liquid 9... Sealed chamber. (7317) Rules for Agent Patent Attorney Kensuke Chika (and 1 other person) St Figure 2

Claims (1)

[Claims] In a pressurized melting container consisting of an inner container and an inner lid made of a corrosion-resistant material, an outer container and an outer lid made of a pressure-resistant material, and a cooling body that is in close contact with the bottom of the inner container, the bottom of the inner container is made uniform. A pressurized S-scale container characterized by having a wall thickness of about 100 mL and a cooling body having a shape compatible with the wall thickness.