Preparation and application of additive formaldehyde capture agent
Abstract:
Formaldehyde is a common and widely used chemical substance in the chemical industry. It has the physical properties of colorless and pungent odor. It has been widely used as an important chemical raw material in the industrial field for decades. Formaldehyde is added in a lot of adornment material, and a lot of chemical or macromolecule product are used in the process of production a few auxiliary agent can be in late use process decomposition produces formaldehyde, wait for instance paint, glue. Nowadays, with the continuous progress of science and technology, people have long been deeply aware of the adverse effects of formaldehyde on the environment and peoples health. Therefore, in recent years, the release of formaldehyde has been widely concerned and studied by more and more people and scientists. Formaldehyde capture agent is a kind of can effectively reduce or even eliminate chemical products of the formaldehyde is contained in a product, along with the people environmental protection consciousness, strengthening the development and research of formaldehyde capture agent began to get the attention of more and more, in this article, we mainly introduce additive formaldehyde capture agent on the preparation methods and applications.
1 introduction
Formaldehyde is an important and widely used chemical raw material in the field of chemical industry. It is a colorless water solution or gas, and has a pungent smell. In the field of chemical engineering or polymer, in the process of processing or manufacturing products, often use adhesives, preservatives, or other chemical materials such as phenolic resin, these ingredients are added to the product in the process of production, as a result, many chemical products in actual use process tend to release a large amount of free formaldehyde, not only for peoples health will produce certain harm, and once formaldehyde released into the air, will be seriously bad for the environment, affect the quality of the air. In recent years, formaldehyde has begun to become indoor environment to pollute one of the main reasons, and the formaldehyde that the place such as a lot of furniture, leather contains in the product volatilization time is longer commonly, can as long as a few years to 10 years, harm time is longer. With the progress and development of science and technology, people gradually began to understand in the presence of formaldehyde and the harm to human body health, countries are being made on the production and use of chemical materials to control strictly, clear the product release quantity of formaldehyde of the strict rules and restrictions, but because of the cost of production of chemical materials and reason for the science and technology, at present most of chemical materials in the process of production is still unable to or can completely avoid the use of formaldehyde release of formaldehyde chemical raw materials.
In recent years, with the concept of green chemistry is put forward as well as to enhance peoples environmental consciousness, the chemical products in the process of using formaldehyde release a quantity restriction problem has attracted more and more discussion and attention, whether formaldehyde and formaldehyde release a quantity to how much even has become people to buy furniture, plywood, glue and other products is an important indicator. So. In order to reduce the amount of formaldehyde released from products or reduce the use of raw materials that can decompose to produce formaldehyde at the production source, formaldehyde capture agent has gradually entered peoples vision and has been widely added to the production process of products. Formaldehyde capture agent is an aqueous solution of a compound, which can react with formaldehyde. Thereby reducing or even eliminating formaldehyde in chemical products, also known as formaldehyde scavengers. A good formaldehyde capturing agent should have the following conditions: first, it is effective and the amount of use is small, it does not need too much amount can significantly reduce the release of formaldehyde; Secondly, the formaldehyde capturing agent can not have any influence on the physical or chemical properties and practicability of the product after use. Thirdly, the products obtained by the formaldehyde capturing agent after the reaction with formaldehyde cannot cause secondary pollution, and cannot produce other releasing substances while eliminating formaldehyde, so it should have excellent stability.
At present, the commonly used in industrial formaldehyde capture agent is usually aqueous solution and inorganic amine salt and amide hydrazine, phenol, organic amine and a mixture, it can in the process of practical application can react with formaldehyde, and excellent stability of some compound formation, formaldehyde capture agent in the actual application according to the purposes can be roughly classified into three kinds, one kind is used to remove the free formaldehyde in the adhesive; The second is used to remove free formaldehyde from artificial wood or plywood. The third is to remove the free formaldehyde that is released into the air during use.
With the popularization of green chemistry in recent years, biocompatible and biodegradable chemical raw materials and products have attracted more and more attention and research. For formaldehyde, natural substances such as aloe and chrysanthemum have a very obvious effect on the removal of formaldehyde, so the development and research of formaldehyde capturing agent with plant as the main raw material has important research significance. In addition, amine based chemical substances also have a good effect on the removal of formaldehyde, through the scientists research shows that urea and formaldehyde can have a chemical reaction to form hydroxymethyl urea, so the amount of formaldehyde released in the product will be significantly reduced. With the progress of society, peoples requirements and attention to health have been gradually raised, so the development and application of formaldehyde capture agent will become a hot topic of research.
1.1 classification of formaldehyde capturing agents
