DE51713C - Apparatus for rectification and distillation of acetic acid - Google Patents

Description

IMPERIAL

PATENT OFFICE.

In the accompanying drawing, the bubble of the column, which is constructed according to this invention, is shown in vertical section. The upper part of the column with the cooling devices, etc., has been left out, since it differs in no way from the usual ones. ' The bladder is divided into two compartments A and B by the partition C. D is the lower part of the column. E is the inlet pipe for the raw acid; F is a tube through which the liquid rectified in the column flows off. G is a small sample cock; H is a three-way stopcock which allows the product flowing through the pipe either back to section A , namely through the pipe /, or into section B through the pipe J. The pipe J is closed at the bottom by a Surrounding tube K open at the top. L is the helmet of the bladder; A ¹ and B ¹ are water level glasses to show how much liquid each compartment contains. A ² B ' ² are cleaning holes with a suitable closure.

At the beginning of the work, compartment A of the bladder is filled with acid. If insoluble reagents are used to purify the acetic acid, e.g. B. brownstone, a sufficient quantity of it is introduced for a longer period of time. However, it is better to use soluble reagents, such as. B. potassium permanganate, which then flow in at any time, dissolved in the raw acid. Now turn the tap H, as shown in the drawing, and start heating.

The heating takes place either in such a way that one respectively the bladder with a jacket. a double wall, or by means of a coiled tube in the bladder. Before work begins, however, the pipe K is filled with pure acid in order to prevent the vapors from being blown out, which would take place as a result of the overpressure in compartment A and in the column if the cock H were to be turned during further operation.

As a result of the warming, the vapors rise in the column, the empyreumatic impurities are separated from the acid, which is rectified, and flows back to A through the pipe. If a sample taken at G shows that the product flowing off has reached the desired degree of purity and strength, turn the tap H and allow the rectified material to flow into compartment B. The goods are further distilled from there in a known manner and the distillate goes through the helmet L to the cooling coil, etc.

To the extent that space is created in section A by the removal of the empyreumatic substances and water, as well as the pure product, new raw acid is allowed to flow in through E without interrupting the distillation.

Claims (1)

Patent claim: An apparatus for rectification and distillation of acetic acid, consisting of one closed by a partition (C) into two Compartments (AB) of which one (A) carries the column and the other (B) the helmet (L) , the two compartments of the still being connected to one another by a pipe, one end (F) of which in the column and its other end (J) protrudes into a supernatant tube (K) in the interior of the second compartment (B) , while a branch pipe (I) from the switching device inserted into the pipe (F) into the first compartment (A) of the still leads into it. For this purpose ι sheet of drawings.