Production methods: 1, neutralization of formic acid and hydrated lime to produce calcium formate, refined to obtain commercial calcium formate.2, compound decomposition of sodium formate and calcium nitrate in the presence of catalyst to obtain calcium formate, co-production of sodium nitrate
Production method:
1. Neutralization method
Formic acid is neutralized with hydrated lime to produce calcium formate, and commercial calcium formate is obtained by refining.
2. Compound decomposition method
In the presence of catalyst, sodium formate and calcium nitrate undergo a double decomposition reaction to obtain calcium formate and co-produce sodium nitrate. Commercial calcium formate was obtained by refining.
3. By-product method of epoxy fatty acid methyl ester
The production of epoxy fatty acid methyl ester develops rapidly, and a large amount of by-product formic acid is produced in the production process. One of the utilization schemes of this by-product formic acid is to produce calcium formate.
4. By-birth method
In the production process, calcium hydroxide is used to provide basic reaction conditions, and formic acid is added in the subsequent reaction and calcium hydroxide neutralization process at the same time to produce calcium formate.
Formic acid is a carboxylic acid that can be added to olefins. Formic acid in the action of acids (such as sulfuric acid, hydrofluoric acid), and olefins quickly react to form formates. However, a side reaction similar to the Koch reaction can also occur, with the product being a higher carboxylic acid.
Pair value of octanol/water partition coefficient: -, upper explosion limit % (V/V) :, lower explosion limit % (V/V) :.
Formic acid is a strong reducing agent and silver mirror reaction can occur. Acidic in saturated fatty acids, the dissociation constant is ×10-4. It slowly breaks down into carbon monoxide and water at room temperature. It is heated to 60~80℃ with concentrated sulfuric acid to decompose and release carbon monoxide. When formic acid is heated above 160 ° C, it decomposes to release carbon dioxide and hydrogen. The alkali metal salts of formic acid are heated to 400 ° C to form oxalates.
It's used in architecture. Fast setting agent, lubricant and early strength agent for cement. Used in building mortar and various concrete, speed up the hardening speed of cement, shorten the setting time, especially in winter construction, to avoid low temperature setting speed is too slow. Fast demoulding, so that cement as soon as possible to improve strength put into use. Calcium formate uses: all kinds of dry mix mortar, all kinds of concrete, wear-resistant materials, floor industry, feed industry, tanning. Calcium formate participation amount and precautions The amount of dry mortar and concrete per ton is about ~%, and the addition amount is %. The amount of calcium formate is gradually increased with the decrease of temperature, even if the amount of 0.3-% is applied in summer, it will play a significant early strength effect.
When heated, sodium formate breaks down into hydrogen and sodium oxalate, which then forms sodium carbonate. Sodium formate is mainly used in the production of insurance powder, oxalic acid and formic acid. In the leather industry, it is used as an acid in the chromium tanning process, as a catalyst and stabilizing synthetic agent, and as a reducing agent in the printing and dyeing industry. Sodium formate is harmless to the human body and can irritate the eyes, respiratory system and skin.
Post time: Jul-15-2024