Method for preparing chromium formate by reducing chromic anhydride with formic acid
A technology of chromium formate and chromic anhydride, which is applied in carboxylate preparation, organic chemistry, etc., can solve problems such as environmental pollution, high energy consumption, and long process, and achieve good economic and social benefits, low energy consumption, and a good reaction process short effect
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Embodiment 1
[0011] 1) At first, get 100 parts of industrial chromic anhydride by mass parts and dissolve with 100 parts of water, join in the reactor that reflux condenser is housed;
[0012] 2) Next, slowly add 200 parts of industrial formic acid to the above reaction kettle. During the addition process, the reaction solution is kept at a slight boiling reflux. After adding the industrial formic acid, heat to keep the reaction solution at a slight boiling reflux for 30 minutes;
[0013] 3) Finally, the reaction solution was cooled to 10° C., crystallized for 3 hours, filtered through a filter cloth, and the solid obtained by the filtration was crude chromium formate.
Embodiment 2
[0015] 1) First, get 100 parts of industrial chromic anhydride by mass parts and dissolve with 130 parts of water, join in the reactor that reflux condenser is housed;
[0016] 2) Next, slowly add 240 parts of industrial formic acid to the above reaction kettle. During the addition process, the reaction solution is kept at a slight boiling backflow. After adding the industrial formic acid, heat to keep the reaction solution at a slight boiling backflow for 30 minutes;
[0017] 3) Finally, the reaction solution was cooled to 20° C., crystallized for 4 hours, filtered through a filter cloth, and the solid obtained by filtering was crude chromium formate.
Embodiment 3
[0019] 1) First, get 100 parts of industrial chromic anhydride by mass parts and dissolve with 200 parts of water, join in the reactor that reflux condenser is housed;
[0020] 2) Next, slowly add 280 parts of industrial formic acid to the above reaction kettle. During the addition process, the reaction solution is kept at a slight boiling reflux. After adding the industrial formic acid, heat to keep the reaction solution at a slight boiling reflux for 30 minutes;
[0021] 3) Finally, the reaction solution was cooled to 13° C., crystallized for 3.5 hours, and filtered through a filter cloth, and the solid obtained by filtering was crude chromium formate.
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