Development history of formaldehyde industry in my country

my country's formaldehyde industry has also experienced a relatively long development process. As a professional formaldehyde manufacturer, Quanxing Chemical will take you to understand it. In the 1950s, my country's formaldehyde industry started in Shanghai Solvent Factory. The technology used at that time came from the Soviet Union. Pumice silver was used as a catalyst. The system pressure was lower than normal pressure, and the oxidation temperature was between 650 and 750 degrees Celsius. Then the formaldehyde passed through After the water is diluted, it enters the evaporator to evaporate. After such a production process, formaldehyde is produced. With the continuous development of science and technology, in the mid-1960s, there was a higher requirement for the concentration of formaldehyde, and iron molybdenum oxide catalysts were already used in the production process of formaldehyde at this time. By 1997, my country had developed a new generation of formaldehyde catalyst, electrolytic silver. The successful development of this catalyst gave my country a new development space for the formaldehyde industry. In the 21st century, major formaldehyde manufacturers have gradually increased the production capacity of oxidation reactors, and made continuous innovations and breakthroughs, which put forward higher requirements for various properties of catalysts.

What is urotropine?

Urotropine, also known as hexamethylenetetramine, hexamethylenetetramine, is a polycyclic heterocyclic compound with a similar structure to adamantane, and the molecular formula is C6H12N4. Urotropine is a white crystal, which can be prepared by the reaction of formaldehyde and ammonia, and the molecule contains four triazacyclohexane rings fused to each other. Limited soluble in water, easily soluble in most organic solvents.

Talking about the production process of formaldehyde

As an important organic chemical material - formaldehyde, it has a low boiling point and a lively nature, so we make a strict warning here. When packaging formaldehyde, the requirements must be high, and storage must be careful. Our company's formaldehyde mainly adopts two-stage falling film concentration, jet granulation and continuous drying technology, which effectively solves the small production scale and high raw material consumption caused by domestic kettle concentration, rake or scraper drying process. , poor product quality and other shortcomings, so that the production of formaldehyde has reached the advanced level abroad. Its main technical work and processing flow is as follows: first depolymerize 37% or 55% formaldehyde aqueous solution, and then obtain about 80% concentrated formazan solution through two-stage falling film vacuum concentration, and after the polymerization reaction occurs under the action of a telogen, Then through spray granulation and continuous drying, about 96% of the finished product of paraformaldehyde is obtained. The main indicators of formaldehyde: Ash content≤100ppm Melting point 120～175℃ Bulk density 600～800g/L PH3.5～5.0 Response time 5 minutes Solubility (10 minutes in 100 ℃ water) 95% Degree of polymerization 8～30 Therefore, the production process of formaldehyde is very complicated and simple. For our excellent formaldehyde production industry, we will fully devote ourselves to the production of formaldehyde. You are welcome to negotiate for purchase.