JPH06201539A - Centrifugal evaporator - Google Patents

Abstract

PURPOSE:To drastically enlarge the area which can be evaporated of a materials solvent medium inside a test tube and to accelerate evaporation speed by speeding up the evaporation speed by that amount if the surface area of the materials solvent medium is enlarged when atmospheric pressure and temperature are the same and by changing the rotation system in a centrifugal evaporator. CONSTITUTION:A rotar 3 fitted to an eccentricity shaft 8 can be rotated freely by a bearing 7 within a vacuum bath 6. When the rotary shaft 4 starts to be rotated, the eccentricity shaft performs circular motion and the rotar also performs circular motion but it is free for rotation by a bearing and does not rotate since it is fixed by a spring 9. On the other hand, the materials solvent medium rotates along the inner periphery of a test tube and always wets the inner wall surface of the test tube. Therefore, the surface which can be evaporated of the materials solvent medium ranges the entire region of the inner periphery of the test pipe.

Description

Description: [0001] [Industrial field of application] The present invention relates to a centrifugal evaporator.

[0002] [Prior Art] A centrifugal evaporator rotates a test tube to expel air in a tank with a vacuum pump while suppressing foaming and protrusion of a material solvent by centrifugal force, thereby concentrating and drying the material. It is something to do. Conventionally, a test tube is rotated by mounting a rotor on a rotating shaft at the center of a tank as shown in FIG. 1 and making a hole on the circumference of the rotor at an angle (generally 15 ° to 35 °) with respect to the rotating shaft. In the hole
The test tube was attached and rotated. in this case,
The test tube is a rotation system that corresponds to the bone of an open umbrella that rotates, and the surface of the rotating sample solvent is perpendicular to the rotation axis as shown in Fig. 1-5.

[0003] [Problems to be solved by the invention] Therefore, the surface area of the solvent capable of evaporating in the test tube during rotation is very limited, which has been an obstacle for increasing the evaporation rate.

[Means for Solving the Problem] In the vacuum chamber (6), the test tube (1) is inserted vertically into the rotor (3), and the rotor is circled by the eccentric shaft (8). Centrifugal evaporator characterized by exercise.

[Operation] When the central axis of the test tube is set upright, the eccentric shaft causes a circular motion, whereby the sample solvent causes a circular motion along the inner wall of the test tube as shown in FIG. In this case, if a certain moment is regarded as a stationary state, the sample solvent is offset to one of the inner walls of the test tube as shown in FIG. 4, but immediately before that, the sample solvent wets the position shown in FIG. In addition, the position shown in FIG. Therefore, the evaporable surface of the sample solvent extends all around the inner wall of the test tube, and the evaporable area is greatly expanded.

[0006] [Examples] Examples of the present invention will be described below. Since the evaporation rate of the sample solvent is determined by atmospheric pressure, temperature and surface area, it is desirable that the sample solvent has a larger surface area. As shown in FIG. 2, in the vacuum chamber (6), the rotor (3) mounted on the eccentric shaft (8) has a bearing (7).
So that it can rotate freely. When the rotating shaft (4) starts to rotate, the eccentric shaft makes a circular motion, and the rotor also makes a circular motion, but the rotation is free by the bearing and fixed by the spring (9). As a result, the test tube (1) does not rotate. As seen from FIG. 3, the mark (11) attached to the test tube (1) is always in a fixed direction (upper side in the figure), and does not rotate while performing circular motion. On the other hand, data solvent (1
0) rotates along the inner circumference of the test tube and constantly wets the inner wall surface of the test tube. Therefore, the evaporable area of the sample solvent covers the entire inner circumference of the test tube, as shown in Fig. 4-14. In addition, the protruding force of the sample solvent under reduced pressure is
Since the solvent is proportional to the depth of the solvent, the solvent becomes shallower as the surface area is expanded. Therefore, the centrifugal force may be smaller than that in the conventional rotation method, and even if the rotation speed is low, the solvent does not project.

[0007] [Effect] When the atmospheric pressure and temperature are the same, if the surface area of the sample solvent is increased, the evaporation rate can be increased correspondingly. By changing the rotation method, the evaporable area of the sample solvent in the test tube can be greatly expanded, and the evaporation rate is accelerated.

[Brief description of drawings]

[FIG. 1] Schematic diagram of a conventional centrifugal evaporator [FIG. 2] Schematic diagram of a centrifugal evaporator according to the present invention [FIG. 3] Circular movement and rotation of a test tube and a sample solvent according to the present invention [FIG. 4] A sample solvent of the present invention Evaporable surface [Explanation of symbols] (1) Test tube (2) Tube (3) Rotor (4) Rotating shaft (5) Surface of rotating solvent (6) Vacuum chamber (7) Bearing (8) Eccentric shaft (9) Spring (10) Material solvent (11) Mark (12) Position just before the material solvent (13) Position just before the material solvent (14) Evaporation surface of the material solvent according to the present invention

Claims (1)

[Claims] [Claim 1] In the vacuum chamber (6), the test tube (1) is vertically inserted into the rotor (3), and the rotor is circularly moved by the eccentric shaft (8). Centrifugal evaporator.