With the improvement of the quality of life, people are more and more keen on keeping pets. The service items and products of pets have increased sharply. Upstream products and downstream services have formed the entire pet economic industry chain, and new formats are booming. Among them, the consumption of cat litter accounts for more than 90% of pet cat consumption products. The function of cat litter has been upgraded from receiving pet cat feces and urine to cleaning the environment, removing odors and improving the pet's living environment. The choice of cat litter has a great influence on the healthy development of cats. Some high quality cat litter developed for the high-end market of cat litter contains an environmentally friendly natural active ingredient, such as sawdust, corncob, etc., as well as some functional ingredients, such as deodorant, anti-mildew, antibacterial, antiviral, etc. These ingredients have no irritation to the skin and respiratory tract of cats and help us protect the health of cats. Antibacterial cat litter, deodorant cat litter, mildew cat litter has gradually become the mainstream of the market high-end cat litter products.

When collecting cat feces and urine, cat litter will volatilize odor, breed microbial bacteria and pollute the environment, so the deodorization function of cat litter is an essential function of high-end cat litter. Cat litter deodorization methods commonly used in the following 5 kinds.

　1. Chemical deodorization method

Common chemical deodorants achieve the effect of removing odors through chemical reactions and chemical bonds with odorous molecules. For example, zinc ricinoleate, the activated Zn ion part in its structure, can be irreversibly bonded with a variety of odor molecules to achieve the effect of net taste. At the same time, there are also data to prove that zinc ricinoleate also has the effect of removing formaldehyde. Soy ethyl sulfate morpholine is a unique cationic surfactant, through the coordination or neutralization of odor molecules, reduce their concentration in the vapor phase, so as to achieve the effect of odor removal. There are also other chemical deodorants such as chlorine dioxide and photocatalysts.

　　2. Flavor deodorization method

　　Ordinary flavor masking technology is not enough for the removal of pet odor, and it is easy to stimulate the pet's sense of smell, which is not conducive to the health of the pet. However, some high-efficiency deodorization technologies in flavors can, on the one hand, be converted into non-odorous molecules by combining with odorous molecules. For example, aldehydes and ketones in flavors are converted into brand-new non-odorous molecules by Michael addition reaction or Schiffer base reaction with odorous molecules, thus reducing the intensity of odorous.

　3, odor adsorption deodorization method

Odor adsorption technology refers to the use of a certain adsorption substrate to combine odor molecules, so as to achieve the effect of removing odor. Both physical and chemical bonding can occur between the adsorption substrate and the malodorous molecule. The adsorption capacity of the adsorption substrate is related to the specific surface area. Common odor adsorption technologies include activated carbon, bentonite, zeolite, cyclodextrin, etc. Take zeolite for example, it is a porous structure of aluminum silicate, the surface of the pore size of 0.2~0.3 nm, these pores can be adsorbed odor molecules. As a deodorant, it is widely used in the fields of agriculture and textile industry.

　　4. Antibacterial deodorization method

Pets carry more bacteria, fungi, pet excrement is not cleaned in time, more likely to breed microorganisms. The addition of cat litter antibacterial agent can eliminate odor by inhibiting microbial growth. Common cat litter antibacterial agents on the market include pyridoxine antibacterial agents, guanidine antibacterial agents, nano antibacterial agents, etc. These products can act on the cell wall of bacteria and affect its permeability, so as to achieve antibacterial and antibacterial effects. When using cat litter antibacterial agents, in addition to effectiveness, its safety and irritation also need to be considered.

　　5. Biological deodorization method

Biological deodorants generally use enzymes produced by microbial metabolism or directly add enzymes to degrade organic substances that cause unpleasant odors, thereby controlling or inhibiting the generation of odors. These organic substances include proteins, oils, skin shedding debris, etc., as well as substances that they transform in the environment. The production of this optimized biological deodorization technology is an important technology to reduce the odor from the source.