antimicrobial chemical composition
A composition and chemical technology, applied in the direction of chemicals for biological control, animal repellents, plant growth regulators, etc., can solve the problems of limited effectiveness and limitations, and achieve the promotion of production and high flexibility and selectivity, avoiding the effects of external equipment and excessive labor intensity
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Embodiment 1
[0058] Example 1 - Preparation of AlP by Binary Condensation Reaction (Base to Acid Route)
[0059] In an exemplary embodiment, AlP is converted to phosphoric acid (H 3 PO 4 ) adding aluminum hydroxide (Al(OH) 3 ) to prepare. with Al(OH) 3 Before combining, the H 3 PO 4 diluted with water, while Al(OH) 3 Not wetted with water prior to addition, although wetted Al(OH) 3 . These reagents combine rapidly without heating at room temperature to produce a white slurry. However, it can also react under heating as needed. h 3 PO 4 is 85 wt% H supplied by Sigma-Aldrich 3 PO 4 aqueous solution, and Al(OH) 3 It is reagent grade Al(OH) produced by Sigma-Aldrich 3 . Specifically, 57.3 g (0.5 mol) of H was diluted with 50 g of water 3 PO 4 , and then with Al(OH) 3 combined. Quickly add 39g (0.5mol) Al(OH) to the solution 3 , and the mixture was stirred slowly at room temperature to wet the powder, resulting in an AlP condensed solid in the form of a dispersion of solid ...
Embodiment 2
[0061] Example 2 Preparation of AlP by Binary Condensation Reaction (Basic to Acid Approach)
[0062] In an exemplary embodiment, AlP having the above-mentioned engineered physical properties or characteristics (such as porosity) is formed by adding aluminum hydroxide (Al(OH) 3 ) added to phosphoric acid (H 3 PO 4 ) to form the desired AlP. with Al(OH) 3 Before combining, the H 3 PO 4 diluted with water, while Al(OH) 3 It is then mixed with water to form a slurry of about 10-25% by weight before addition, in some cases according to Al(OH) 3 The grade of Al(OH) 3 The percentage by weight is as high as about 40%. In the preparation of Al(OH) 3 When making a slurry, the water can be heated to help disperse the aluminum hydroxide powder, for example, to overcome certain properties of a particular grade of aluminum hydroxide. The heated slurry can be kept at high temperature to be added to the acid. For very high grade aluminum hydroxide with high purity and small partic...
Embodiment 3
[0070] Example 3 Binary condensation reaction to prepare AlP (acid to base route)
[0071] It was found that changing the order of addition changed the catalytic nature of the condensation reaction, ie adding acid to a basic slurry resulted in a slower local pH change and that the reaction was predominantly base catalyzed. In localized regions of the solution, AlP particles form slower and the particles are smaller. The resulting particles often have higher surface areas than acid catalyzed particles and are less agglomerated and agglomerated. In an exemplary embodiment, the order of addition in Example 2 is reversed, that is, the required amount of phosphoric acid is slowly added to the aluminum hydroxide slurry. The slurry was prepared as described in Example 2. Phosphoric acid was added slowly over a period of about 30 minutes to 1 hour, and the resulting mixture was stirred mechanically and heated to about 95° C. for 3 hours. AlP particles were isolated, purified and dr...
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Abstract
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