Manufacture of granular isobutylidenediurea
First Claim
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1. In a continuous process for the production of solid granular isobutylidene diurea by condensation of urea with isobutyraldehyde in the presence of a mineral acid, catalyst, the improvement consisting of repeatedly alternately adding phosphoric and sulfuric acid at different intervals of time to the continuous feed of the urea and isobutyraldehyde.
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Abstract
The preparation of isobutylidenediurea from isobutyraldehyde and urea, the particle size of the product being controlled by alternate use of sulfuric acid and phosphoric acid.
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Citations
5 Claims
- 1. In a continuous process for the production of solid granular isobutylidene diurea by condensation of urea with isobutyraldehyde in the presence of a mineral acid, catalyst, the improvement consisting of repeatedly alternately adding phosphoric and sulfuric acid at different intervals of time to the continuous feed of the urea and isobutyraldehyde.
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