JPS59136102A - Method for recovering solvent - Google Patents

Abstract

PURPOSE:To recover a solvent with high thermal efficiency and to make the disposal of contaminant easy by distilling a contaminated solvent brought into an internal vessel consisting of a folding material under heating with the heat radiated from outside in a distillation vessel made of a transparent material. CONSTITUTION:An internal vessel 100 consisting of a foldable and transparent or a black opaque material such as plastics is placed in a distillation vessel 10, wherein at least the upper half of the vessel is made of a transparent material such as glass and the vessel can be opened and shut widely by means of a lid part 11 and a vessel part 12 constituted therein. An easily evaporative contaminated solvent is charged into the internal vessel 100 supported by a combination of the lid 11 and hanging means 13 and 14 on the internal vessel 100 side. Then the solvent is evaporated by the heat from the outside of the distillation vessel 10 radiated from a radiation heat source such as an infrared lamp. The solvent is recovered in a condensate tank 20 through a piping 30 and a cooling apparatus 40. After distillation, the internal vessel 100 is folded and disposed together with the residual contaminant therein.

Description

[Detailed description of the invention] The present invention relates to a method for recovering solvents, particularly easily evaporable solvents.

Many organic solvents are used not only as solvents, but also for cleaning and, in some cases, high-pressure jet cutting, in which case the solvent is recovered and reused by distillation.

Conventionally, when distilling a solvent recovery tank, it has been troublesome to collect and dispose of the contaminants remaining in the distillation tank.

In addition, heating during distillation has been either external heating or internal heating, but external heating has a large heat loss, and internal heating has problems such as the dissolved solute sticking to the heating element.
The present inventor attempted to utilize radiant heat and succeeded.

According to the present invention, an inner container made of a collapsible material is placed in a distillation container that can be opened and closed in a wide manner and is made of a transparent material at least in its upper half, and a contaminated solvent is placed inside the distillation container. A method for recovering a solvent is provided in which the solvent is distilled and recovered by applying more radiant heat, and the inner container is then removed and disposed of along with any remaining contaminants.

Next, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a situation in which the method of the invention is carried out.

The distillation container 10 consists of a container part 12 and a lid part 11.

Both are made of transparent materials. Both of these.

It can be releasably connected and can be opened so that when it is removed, the contents inside can be expanded. Normally, both have 7 lunges, which can be fixed with clamps, bolts, etc. Clever materials for distillation vessels are glass and melt-resistant plastics.

A conduit 60 is connected to the lid 11 , which is connected to the condensation tank 20 . At the rear of the conduit filter 0 is a cooling device 40 (for example, a jacket pipe is attached to pass cooling water).

The inner container 100 is placed inside the distillation container. Inner container 12
A suspension means 14 such as a hole or a loop is provided on the upper edge of the fl-
Furthermore, suspension means such as hooks and clips 13 are suspended from the back surface of the lid portion 11, and the inner container is supported by these attachments. The inner container material is typically plastic. The material of the inner container may be transparent, as described below, or black and opaque.

A radiant heat source, such as an infrared light bulb 50, is placed outside the distillation vessel. Although only one is shown in the figure, it may be provided so as to surround the distillation container.

That is, it may be surrounded by a ring-shaped electric resistance heating element with two reflecting mirrors. In this case, whether the material of the inner container should be transparent or transparent depends on the size and shape of the container, the nature of the solvent to be collected, etc.

Using this apparatus, the distillation recovery of low boiling point heptafluorochlorinated hydrocarbon solvents can be carried out satisfactorily.

[Brief explanation of drawings]

The accompanying drawing shows an example of an apparatus for carrying out the method of the invention. Patent applicant Nuclear Fuel Industry Co., Ltd.

Claims (1)

[Scope of Claims] 1. An inner container made of a collapsible material is placed in a cuffed distillation container that can be opened and closed at least in its upper half made of a transparent material, and a contaminated solvent is poured into the distillation container. A solvent recovery method that often involves applying radiant heat from the outside to distill and recover the solvent, and then removing the internal container along with any remaining contaminants and disposing of it. 2. The method according to claim 1, wherein the inner container is made of a transparent material. 3. The method according to claim 1, wherein the inner container is made of black material.