JPH029844Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a rotary vacuum system that rotates a flask to increase the evaporation area and perform vacuum distillation, concentration, drying, recovery, etc. of solutions with simple operations. Concerning a concentrator (rotary evaporator).

(Prior Art) Conventionally, in this type of apparatus, there are rotary vacuum concentrators for high boiling point solvents and low boiling point solvents depending on the difference in boiling point of the solvents. In addition, there are rotary vacuum concentrators that can switch between refluxing and recovering the solvent [References: Tokyo Rika Kikai General Catalog (Tokyo Rika Co., Ltd.), Shibata Scientific General Catalog (Shibata Kagaku Kikai Kogyo Co., Ltd.), Yamato Scientific Instruments General catalog (Yamato Science Co., Ltd.)]. However, there are no rotary vacuum concentrators that have a bottom wall in the direction of the opening of the solution container and are equipped with a container for collecting the solution or solids ejected due to bumping or foaming.

(Problems to be solved by the invention) When the conventional device is used, if the solution to be concentrated is a solution that is prone to bumping or is a foaming solution, it is difficult to concentrate due to bumping or foaming. Bumping substances such as solutions and solids enter the solvent recovery container. Therefore, in order to continue concentrating the solution, it is necessary to once remove the solvent recovery container and take out the bumping material, and then restart the concentration operation. However, depending on the nature of the solution, when the pressure is returned to normal pressure from a reduced pressure state, air or
Some solutions have the property of repeatedly causing bumping or foaming when the pressure is reduced again because gas is inhaled. When attempting to concentrate a solution with such properties using a conventional rotary vacuum concentrator, it is not possible to return the solution that has flown into the solvent recovery container due to bumping or bubbling to normal pressure and then take it out. Can not.

The present invention was developed in view of the above points, and even if bumping or foaming occurs, vacuum concentration can be continued without interruption, and after the concentration operation is completed, bumping or foaming can be prevented. It is an object of the present invention to provide a rotary vacuum concentrator capable of recovering the solution or bumping substances such as solids that are thrown out without diluting their concentration.

(Means for Solving the Problems) To achieve the above object, the present invention provides a rotary vacuum concentrator equipped with a distribution pipe to which a cooler is connected, which has a bottom wall in the opening direction of the solution container. A rotation characterized by comprising a distribution pipe to which a bumping substance collection container is connected and a solvent collection container is connected below the connection port of the cooler in a direction different from the opening direction of the solution container. It was a type vacuum concentrator.

(Operation of the invention) Therefore, according to the rotary vacuum concentrator of the invention, when bumping or foaming occurs, the bumping liquid jumps out of the opening of the solution container and flows to the bottom in the direction of the opening of the solution container. The bumping material collides with the bottom wall of the bumping material collection vessel having a wall. The bumping material that collides with the bottom wall of the bumping material collection container falls along the bottom wall and accumulates in the bumping material collection container. On the other hand, the gas generated in the solution container enters the distribution pipe through the opening of the solution container and is liquefied by the cooler connected to the distribution pipe. The solvent will collect in the solvent collection container connected below the mouth.

(Effects of the invention) As described above, this invention allows a solution that has the property of bumping or foaming to be concentrated under reduced pressure without interruption even when bumping or foaming occurs, and after completion of the concentration, A solvent recovery container connected below the connection port of the cooler, which is in a direction different from the opening direction of the solution container, securely removes bumping substances such as solutions or solids that pop out due to bumping or bubbling. It became possible to recover it. Conventional rotary vacuum concentrators have only one container for solvent recovery, so the solution or solids ejected by bumping or bubbling are the same as the solvent subsequently recovered by distillation. Since the solute was collected in a container, it was necessary to repeat vacuum concentration to remove the solute from the solution diluted with the solvent. If the rotary vacuum concentrator according to the present invention is used, the solution spewed out due to bumping or bubbling is not diluted, so that vacuum concentration can be completed again in a short period of time.

Next, the rotary vacuum concentrator of this invention will be explained in more detail by way of examples.

(Example) The present invention will be explained based on an example shown in FIGS. 1 and 2.

FIG. 1 is a side view, and FIG. 2 is a front view of the distribution pipe. FIG. 1 and FIG. 2 show an embodiment of a vertical rotary vacuum concentration apparatus. The names of each part are as follows: 1. Flask for collecting bumping substances such as solutions or solids ejected due to bumping or foaming, 2. Flask for solvent collection, 3. Rotating flask for solution, 4. Piping for division, 5. Vapor duct, 6 coolers, 7 exhaust connections, 8 drives, 9 columns and 10
clamp. 1 to 7 are made of glass. In each case, the glasses are connected to each other by common sliding or spherical sliding. However, the structure of the cooler 6 can be either a serpentine tube cooler or a brewer bottle type cooler, and the connection is compatible by common sliding or spherical sliding. In this vertical rotary vacuum concentrator, the distillate is distilled out as vapor from the rotating solution flask through the vapor duct into the distribution pipe. A cooler and a solvent recovery flask are connected to the top and bottom of the distribution pipe section by a common sliding part, and a bumping substance recovery flask is connected by a common sliding part in the direction of the rotation axis of the vapor duct. It has a structure that The vapor duct 5 is rotated by the drive unit 8, and the rotary flask for the 3 solutions rotates accordingly, stirring the contents under reduced pressure. 6. When the condenser is of a convoluted tube type, heat exchange with the distilled solvent is performed by passing cooling water or a refrigerant through the condensed tube. 6. If the cooler is a brewer bottle type, heat exchange is performed with the distilled solvent using dry ice or liquefied gas (liquid nitrogen, etc.). 7. Reduce the pressure in the glass container system of the rotary vacuum concentrator using an asvilator, vacuum pump, etc. through the exhaust connection port. In this example, 3
The solution or solid that has come out of the solution rotating flask due to bumping or bubbling passes through five vapor ducts and is directly collected into the flask for collecting one bubble, the bumping solution, or the bumping solid. Further, the solvent distilled from the rotating flask for 3 solutions passes through the vapor duct 5 and the 4-part pipe to the cooler 6, and is recovered from the 4-part pipe to the 2-solvent recovery flask. In the structure of this example, 1
It is automatically selected whether to be collected in 1 or 2.

1 bubble, bumping solution or, in an embodiment of the present invention;
The flask for collecting bumping substances such as bumping solids may have any shape as long as it can be connected by common sliding.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a vertical rotary vacuum concentrator, and FIG. 2 is a front view of a distribution pipe portion of the vertical rotary vacuum concentrator. The names of the parts in Figures 1 and 2 are as follows: 1...Flash, flask for collecting bumping substances, 2...
Flask for solvent recovery, 3... rotating flask for solution, 4... distribution pipe, 5... vapor duct, 6...
...Cooler, 7...Exhaust connection port, 8...Drive unit, 9
...strut and 10...clamp.

Claims (1)

[Scope of Claim for Utility Model Registration] A rotary vacuum concentrator equipped with a distribution pipe to which a cooler is connected, a bumping substance collection container having a bottom wall in the opening direction of the solution container is connected, and a solution 1. A rotary vacuum concentrator comprising a distribution pipe to which a solvent recovery container is connected below a connection port of a cooler in a direction different from the opening direction of the container.