Potassium hydroxide The use of this product is more common, the specific application of the chemical industry value is high, then the application of this product a lot, we know how much?
Preparation method of refractory liquid: 8 kg of granular potassium hydroxide, 7 kg of powdered sodium carbonate (soda ash) (manufactured by Asahi Glass Co., Ltd.) and 30 kg of metal silicide were added in the reaction vessel, followed by 60 L of water. In which the natural reaction began, from the bottom of the potassium hydroxide began to react violently, in the reaction tank from the lower side to the upper side of the convection.
When the reaction temperature rises naturally, the reaction temperature is in the range of 80 to 90 ° C, and the reaction state is the most active. The reaction temperature is not higher than 92 ° C. The reaction ends at about 10 h, separating the solid, and about 48 L (about 70 kg) of the refractory solution can be obtained. The residual solid is a metal silicide block, if washed with water, leaving about 22kg of metal silicide blocks. In this remaining metal silicide block, a metal silicide block of about 8 kg was added and the sum of 30 kg of metal silicide was added to the second reaction.
In the same manner as in the first reaction, 8 kg of granular potassium hydroxide and 7 kg of powdered sodium carbonate (soda ash) (manufactured by Asahi Glass Co., Ltd.) were added to the reaction vessel, followed by sequentially adding 22 kg of the metal silicide block And 8 kg of new metal silicide blocks, followed by the addition of 60 L of water to start the second preparation of the refractory reaction.
In the preparation, according to the first addition of granular potassium hydroxide, and then adding powdered sodium carbonate (soda ash), then add the metal silicide block, and then add the water in the order of addition, starting from the bottom of potassium hydroxide reaction can be formed up and down Convection active reaction, which prepared the better performance of refractory liquid.
In this paper, we can general understand the preparation method of this potassium hydroxide refractory adhesive, and this preparation can be applied to thick cardboard, polystyrene foam and other plate preparation of cold quality frame, TV case, Packaging materials and tables and chairs and kitchen utensils, hope that the contents of the text to help you to help.
Potassium hydroxide as a chemical good material, is widely used in industrial, chemical and other fields of manufacturing, then the knowledge of this product, we understand how much, the following article for everyone to explain this material drawing Test principles and results.
Principle: Gram-negative bacteria in the cell wall in the dilute alkali solution is easy to rupture, the release of non-broken DNA spiral, so that potassium hydroxide suspension showed sticky, can be used in the inoculation ring to pull out the sticky wire, and Gram-positive bacteria There is no such change in dilute alkali solution.
Method: Take 1 drop of 40g / L aqueous solution of potassium hydroxide (fresh preparation) on the clean glass, take fresh colony a little, stir and mix with aqueous potassium hydroxide solution, and every few seconds to mention inoculation ring, observe whether Pull out the sticky wire.
Results: Inoculation with the inoculation ring was positive, still the suspension was negative.
Application: mainly used for gram-negative bacteria and easy to decolorize the identification of Gram-positive bacteria. Most of the Gram-negative bacteria in 5 ~ 10s within the positive reaction, and some need 30 ~ 45s, Pseudomonas, Lactobacillus, Flavobacterium, Alcaligenes, Moraxella and most of the positive in 10s , Acinetobacter, Moraxella responded slowly, most of the strains in 60s positive, and Gram-positive bacteria after 60s is still negative.