SU1359963A1 - Method of desorption of rare earths - Google Patents

Abstract

The invention relates to the field of bioinorganic chemistry and can be used in the analytical chemistry of rare earth elements in order to reduce the consumption of reagents and increase the economic and environmental friendliness of sorption processes and the production of antibiotics. The essence of the invention lies in the fact that rare-earth elements are desorbed from the KU-2 and KU-I cation exchanger phase, saturated in acidic media, with a solution after sorption, exhausted by REE. in the presence of municipal waste from the production of antibiotics neomitskna. erythromycin, linkocomia. on and some others. 2 tab.

Description

Oo ate CO

co o co: co The invention relates to the field of bioinorganic chemistry and can be used in analytical chemistry of rare earth elements (REE). The aim of the invention is to simplify and reduce the cost by reducing the cost of reagents for the preparation of desorption solutions, improving the efficiency and environmental friendliness of the sorption-desorption process. Example I. Strong acid sulfonic cation exchanger KU-2 in H ± form was saturated with REE from sulphate containing solution. 100 g / l of sulfuric acid and Zg / l REE, to the maximum capacity equal to 89 mg / g. the saturated cation exchanger was in contact with a solution containing 100 g / l of sulfuric acid less than 5 mg / l of REE (“waste sorption solution), in two versions: in the absence of mycelial production waste of gentamine, neomycin, erythromycin, phenoxymethylpenicillin, lincomycin, kanammcin. Single-stage contacting in static mode for 6 hours with a ratio of desorbing solution and cation exchanger 40: 1 and loading mycelial arms equal to 2.5% relative to the mass heme of rare-earth elements sorbed by cation exchanger. The results are presented in table. I. Table1 Results of the desorption of rare earth elements in the lagging Continued table. 1 gp 75 15.7 erythromycin phenoxymethylpenicillin oxytetracycline lincomycin kanamycin without mycelial waste As follows from the data in table. 1 single-stage elution with solutions obtained after sorption without adjusting the chemical composition in the presence of mycelial waste from the production of antibiotics makes it possible to achieve a degree of REE desorption equal to 16–20%, {the exception is mycelial waste of geitamycin production, in the presence of which the degree of desorption in one stage is em 3.4%). Example 2. In the proposed method, the cation exchanger KU-1 in the ammonia form was saturated for 5 hours with rare-earth elements from a 3N solution of sulfuric acid containing 4.31 g / l of REZ. Achieved capacity equal to 2.98%. A saturated cation exchanger with a volume of 5.8 ml of REE was desorbed in a laboratory ion-exchange column with a 3N solution of sulfuric acid, into which 3 g of mycelial production waste of oxytetracyclia was preloaded into 200 ml of solution (Table 2):

1.42

8 15 1.30 1.20

0.66 70

13 0.62 73 0.57 75

The claimed method also has high efficiency under dynamic conditions: it allows almost 100% desorption-REE, allows for desorption waste sorption solutions without reagents costs for measuring the composition of solutions, it is useful to use waste products of antibiotics.

Thus, the method compared with the prototype allows: desorption of rare-earth elements by solutions obtained after sorbcin, without the cost of chemicals for changing the chemical composition or the introduction of a new reagent for this sorption system at the desorption stage; after removing (for example, fluorine) from the eluate of micelle waste, repeat the sorption cycle by known methods and desorption using the proposed method to reach the maximum in these conditional capacities, i.e., perform the process of concentration without the use of reagents; solve the waste problem

Continued table. 2

multi-tonnage antibiotic production.

The technical and economic efficiency of the inventive method as compared with the prototype method is due to the abovementioned 30nm more advantageous and is designed to reduce the cost of carrying out the desorption process, reduce the cost of disposal and utilization of the sorption waste solutions used in the inventive method in the desorption process,

35 reducing the cost of environmental protection associated with the production of antibiotics.

Claims (1)

Invention Formula Q A method for desorption of rare-earth elements from a sulfonic cation exaggerated by them during sorption of a sulfuric acid medium, including the treatment of the sulfonic acid solution, characterized in that, in order to simplify and cheaply the method, desorption is carried out with a solution coming out of the sorption flora in the presence of solid particles. production of antibiotics.