1

2

3

4

5

6

7

8

Temperature, ˚C

120

120

120

85

85

85

85

120

Pressure, bar

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.4

Stirring rate, RPM

400

400

400

400

400

400

400

400

Time, hour

2

2

2

2

2

2

2

2

Raw materials

Ba(OH)₂ %

4.0

6.5

9.0

4.0

6.5

9.0

6.5

6.5

Water, %

65.3

63.6

61.9

65.3

63.6

61.9

57.5

57.5

Leonardite, %

30.7

29.9

29.1

30.7

29.9

29.1

36.0

36.0

Results

Ba amount in Ba-HA %

0.84

3.8

9.2

0.7

4.2

14.6

8.8

8.5

Solubility in alkaline, %

0.4

0.3

0.6

2.6

0.8

0.7

1.4

0.5

Ash, %

40

37

44.00

37

40

44

38

37