Methyl Isobutyl Ketone

ABSTRACT

In this study Methyl Isobutyl Ketone (MIBK) and acetophenone (Methyl Phenyl Ketone) are presented as suitable agents for removal of Fe(III) from concentrated hydrochloric acid solutions.

An extensive study applying 4 parameters was carried out: Time (5, 10,15,20,30 and 60 minutes), Stirring rate (200, 300, 400 and 500 r.p.m), Solvent to HCl

Ratio (5%, 10%, 14% and 16%), and initial concentration of Fe ions in crude HCl (95.24, 126 ppm, 330 ppm and 1955 ppm).The best Condition was found to be

30 min – 400 r.p.m – 14 %.

The distilled water was used to strip Fe ions out of MIBK; In order to get most of the MIBK dissolved in both the concentrated HCl and water. Diluents were used such as benzene, kerosene and xylene. Xylene gives better

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The present work examines the possibility of iron (III) separation from hydrochloric acid solution by solvent extraction using MIBK at various initial metal concentrations and MIBK ratios.

2. Chemicals & Reagents

All chemicals were used as delivered without any purification.

Two liquids, i.e.,MIBK (Methyl Isobutyl Ketone: 4-Methyl 2- Pentanone)

From SDFCL s d fine chemicals (India) Assay: 99.0 min. Sp.Gr. : 0.80 g/ml and acetophenone (Methyl Phenyl Ketone From Alpha chemicals. Assay:

98% min. Sp.Gr:1.026; were used as metal ion carriers in solvent extraction; benzene, kerosene and xylene as diluents. MIBK was used as 10, 12, 14 and

16 vol. % solution.

The spent acid was a yellow solution with the concentration 11 M and iron concentration range from 95 to 1955 mg/L

3. Liquid–liquid extraction procedure

Extraction was carried out in a typical way: aqueous sample, containing metal ions in 11 M HCl were mechanically shaken with MIBK for different time periods at (25±1°C) and then transferred into glass separator funnels

4.3. Effect of different stirring speed

The Percentage extractions of the Fe3+ ion from the high-level (125ppm) aqueous solution for different stirring speed of MIBK are given in Table 3.

Table 3. Percentage extraction of Fe ions at different stirring speed with

MIBK.

r.p.m Ce % extraction

100 13.53 95.89

200 12.58 96.18

300 4.79 98.54

400 2.95 99.10

500 11.21 96.60

As shown from table increasing the R.P.M from 100 to 400 increases % extraction then decreases; so time 400 R.P.M was chosen as optimum speed of agitation.

4.4. Effect of initial concentrations of iron (III)

Table 4. Percentage extraction at different initial concentrations of iron

(III).

Ci(mg/L) Ce(mg/L) % extraction

95.24 2.45 97.42

125.9 3.04 97.58

329.7 2.95 99.10

1955 0.43 99.97

As shown from table 4 increasing the initial concentrations of iron (III) from 95.24 to 1955 ppm has increased % extraction.

4.5. Effect of the diluents on the extraction of iron (III)

In order to get most of the MIBK dissolved in both Conc. HCl and water we used diluents such as kerosene, Benzene and Xylene. Table 5 shows