SU887560A1 - Method of ammonium acetate production - Google Patents

Description

one

The invention is not related to chemical technology and may be irimeneio in the chemical industry for the achievement of ammonium acetate.

The target product is used in the technology of organic synthesis, as well as in agriculture for preserving feed.

Known are the synthetic pathways of ammonium salts of monocarboxylic acids by passing a liquid ammonia through an aqueous solution of an acid at 25-95 ° C 1, 2 and by reacting an acetic acid solution with a stoichiometric amount of gaseous ammonia 3.

However, the known methods for producing ammonium acetate have a number of disadvantages. They are energy consuming, since they require heating from the outside, are associated with the difficulty of separating the sun from its solution, and require cruise-sized equipment.

And the closest to the proposed technical essence and the achieved result is a method of obtaining ammonium acetate by reacting vapors of acetic acid with gaseous am.mpac prn 115-125 C with subsequent withdrawal of the pellet product pz of the reactor in the extrusion. The output of ammonium ammonium 98%. The process is continuous 4.

The disadvantages of this process for the preparation of acetic ammonium gas are the process in the gas phase at 115-125 ° C; Acetic acid is used to heat the reaction mixture and heat is consumed.

The goal of the pioneer is to simplify the process technology.

This goal is achieved by carrying out the process of producing ammonium acetate with the interaction of gaseous ammonia and acetic acid.

The distinctive feature of this method is that it uses diluted liquid acetic acid and performs iodine reagents at 20-22 ° C. Typically, the process is carried out at 60-90 ° C.

Heating of the reaction mixture is carried out at 20 HPS due to the reaction tenlota, excess heat is diverted.

The rate of feed of the initial reagents to the reactor is within limits (in terms of pa 100% reagents); for acetic acid, 7.4-I g / .min; for ammonia, 2.09-3, 14 g / min. The intensity of the saBHcirr process depends on the degree of sputtering of the liquid acetic acid supplied to the reactor and the speed of supply of both acid and ammonia.

When the feed rate of the reagent was increased, the excess of the optimal product and the resulting product was an excess of acid. At too low speeds, the productivity of the process is reduced.

The resulting ammonium acetate is formed and excreted in the form of crystals.

The yield of acetic acid am Ion is 99%.

Acetic acid brand hch (GOST 61-69) and ammonia (GOST 6221-75) are used as the raw material.

Example 1. In the upper part of a vertical reactor with eggs and scrapers on a rotating shaft, sprayed liquid acetic acid is supplied through a nozzle, and ammonia is fed to the lower part through a nozzle. The main reaction takes place in the middle of the reactor. The ammonium acetate formed is deposited on the upper shelf, and then scrubbed by the scrapers. Ammonium acetate is produced from the bottom part. The temperature of acetic acid and ammonia entering the reactor is 20 ° С, temperature in the zone of 60 ° С. The feed rate of the starting components in terms of 100%: acetic acid 10 g / min, ammonia 2.83 g / lp-sh. In the case of non-continuous operation, 754.75 g of ammonium acetate are obtained in 1 hour. The output of ammonium acetate 99%.

Example 2. The process is carried out in the reactor described above. The feed rate of the components in terms of 100% iye: acetic acid 10 g / .min, ammonia

 g / min. With continuous operation of the reactor for 1 hour and 762.45 g of acetic acid ammonium. The product yield is 99%.

Example 3. The ammonium acetate process is carried out in the reactor described in Example 1 at 90 ° C. The rate of reactant reagents is the same as in irilgers 1 and 2. For 1 h of continuous reactor operation, 756.29 g of product was obtained. The output of hydrochloride ammosh g 98.2%.

Form m u l a and 3 o b e e e u u

1. A method for obtaining ammonium acetate with the interaction of gaseous ammonia and acetic acid, characterized in that, in order to simplify the process technology, a spray liquid acetic acid is used and the countercurrent reagents are fed with 20–22 ° C.

2. Method Io and. 1, from which is that the process is conducted at 60-90 ° C.

Information taken into consideration and exertize

1. The patent of Germany K ° 2366090, cl. C 07 C 53/24, publ. 1977.

2. The patent of Germany Up to 2751865, cl. C 07 C 53/24, publ. 1978

3. The patent of Poland AG 51387, cl. 12011, onubl. 1966.

4. USSR author's certificate Until 539027 ,. cl. C 07 C 5310, 1976.

Claims (2)

Claim 1. The method of producing ammonium acetate by the interaction of gaseous ammonia and acetic acid, characterized in that, in order to simplify the process technology, use spray 2Q other liquid acetic acid and feed the reagents in countercurrent flow at 20–22 ° C. 2. The method according to claim 1, wherein the process is carried out at 60-90 ° C.