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Butyltin mercaptide synthesis method and technology

admin 7月 16th, 2024 News

Synthesis method and process of tin butyl mercaptide

Butylmercaptostannane, chemical formula C4H10OSSn, is a commonly used organotin compound, mainly used as a stabilizer for polyvinyl chloride (PVC) and is favored for its excellent thermal stability and transparency. . The following will discuss several typical synthesis methods and process flows of butyltin mercaptide.

Synthetic route one: reaction between butyltin chloride and mercaptans

This is one of the common methods for synthesizing tin butyl mercaptide. Butyltin chloride (BuSnCl3) is used as the starting material and reacts with butylthiol (BuSH) under an appropriate solvent and temperature to generate butyltin mercaptide. This reaction can be expressed as:

$BuSnCl_{3} + BuSH ? Bu_{2} SnS + 3 HCl$

Process steps:

Raw material preparation: Weigh butyltin chloride and butylmercaptan in a certain proportion, and prepare a dry reaction vessel and solvent.
Control of reaction conditions: Under nitrogen protection, dissolve the raw materials in a solvent, such as dichloromethane or tetrahydrofuran, and then stir the mixture under mild heating conditions.
By-product removal: After the reaction is completed, unreacted raw materials and by-products are removed by filtration or distillation. For example, hydrochloric acid can be removed by washing with water.
Product purification: Further purify the product through column chromatography, crystallization or distillation.
Finished product inspection: Products need to undergo quality inspection, including the measurement of purity, color, specific gravity, refractive index and other indicators to ensure compliance with standards.

Synthesis Route 2: Reaction of Butyltin Alcohol and Hydrogen Sulfide

Another synthetic route is to use butyltin alcohol (Bu2SnOH) to react with hydrogen sulfide (H2S) to generate butyltin mercaptide. The reaction equation is as follows:

$Bu_{2} SnOH + H_{2 ?} S ? Bu_{2} SnS + H_{2} O$

Process steps:

Raw material mixing: Mix butyltin alcohol and hydrogen sulfide gas under an inert gas environment.
Reaction catalysis: Catalysts (such as acids or bases) may be needed to promote the reaction.
Product isolation: by distillation.??Other physical methods separate products and unreacted raw materials.
Refining: Use appropriate methods to remove impurities and improve product purity.

Process notes:

Safety considerations: The raw materials and by-products involved in the synthesis process of butyltin mercaptide may be corrosive or toxic. Appropriate personal protective equipment must be worn during operation and in a well-ventilated environment. carried out under the conditions.
Reaction conditions: Controlling reaction temperature, pressure and solvent selection are crucial to the efficiency of the reaction and the purity of the product.
Environmental protection measures: By-products produced by the reaction, such as hydrochloric acid or water, need to be properly treated to avoid environmental pollution.

Conclusion

The synthesis of tin butyl mercaptide is a process involving multi-step chemical reactions, which requires precise control of reaction conditions and process parameters. In industrial production, factors such as cost-effectiveness, environmental protection and safety regulations also need to be considered to achieve efficient, green and sustainable production goals. Different synthesis routes are suitable for different production scales and needs, and choosing the appropriate process flow is the key to success.

Extended reading:

CAS:2212-32-0 – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co., LTD

N,N-Dicyclohexylmethylamine – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co ., LTD

bismuth neodecanoate/CAS 251-964-6 – Amine Catalysts (newtopchem.com)

stannous neodecanoate catalysts – Amine Catalysts (newtopchem.com)

polyurethane tertiary amine catalyst/Dabco 2039 catalyst – Amine Catalysts (newtopchem.com)

DMCHA – morpholine

N-Methylmorpholine – morpholine

Polycat 41 catalyst CAS10294-43-5 Evonik Germany – BDMAEE

Polycat DBU catalyst CAS6674-22-2 Evonik Germany – BDMAEE

Butyl tin mercaptide market analysis report

admin 7月 16th, 2024 News

Market Overview

As an important organotin compound, butyltin mercaptide is widely used in plastic stabilizers, catalysts and other fields, especially in the processing of polyvinyl chloride (PVC). In recent years, with the growth of global demand for environmentally friendly materials and the continued expansion of the PVC industry, the market demand for butyltin mercaptide has shown a steady upward trend. As one of the world’s largest production and consumption markets of butyltin mercaptide, China’s industry dynamics have an important impact on the global market.

Requirements analysis

The main downstream application markets of butyltin mercaptide include PVC products, coatings, adhesives and other industries. With the widespread application of PVC materials in construction, packaging, automobiles and other fields, the demand for high-quality stabilizers continues to increase, driving the market demand for butyltin mercaptide. In addition, consumers’ emphasis on product safety and environmental protection has prompted the industry to transition to more efficient and less toxic stabilizers. As a relatively environmentally friendly choice, butyl tin mercaptide is expected to further expand market demand.

Supply analysis

China’s production capacity of butyltin mercaptide occupies a dominant position globally. There are many large manufacturers in the industry and the market competition is fierce. However, due to the continuous improvement of environmental protection and safety requirements in the production process, some small or non-compliant production capacities have been gradually phased out, and industry concentration has increased. This has led to a general improvement in product quality on the market, but it has also increased production costs and may put upward pressure on product prices.

Technological innovation

Technological innovation is a key factor driving the development of the butyltin mercaptide market. The development of new synthesis technologies, such as the use of more efficient catalysts and more environmentally friendly production processes, not only improves production efficiency, but also reduces environmental pollution and meets the market’s demand for sustainable development. In addition, the optimization of product performance, such as improving thermal stability and transparency, has also promoted the application of butyltin mercaptide in the high-end market.

Market Challenges

Although the market prospects of butyltin mercaptide are optimistic, it still faces some challenges. First of all, environmental protection regulations are becoming increasingly strict, which puts forward higher requirements for the production of butyltin mercaptide and increases the operating costs of enterprises. Secondly, the emergence of substitutes, such as calcium zinc stabilizers, organotin composite stabilizers, etc., poses a threat to the market share of butyltin mercaptide. Finally, uncertainty in the global supply chain, such as raw material price fluctuations, international trade frictions, etc., may also affect market stability.

Development trends

The butyltin mercaptide market is expected to continue to grow in the next few years, but the growth rate may slow down due to the above-mentioned challenges. The industry will pay more attention to green, environmentally friendly, and efficient production methods, while increasing investment in research and development, improving product performance, and exploring new application areas. In addition, industry consolidation will continue. Large companies will enhance their market competitiveness through mergers and acquisitions, while small companies will need to seek survival space through technological innovation.

Conclusion

The development of the tin butyl mercaptide market is affected by multiple factors, including the growth of downstream demand, the implementation of environmental protection policies, the promotion of technological innovation, etc. . Facing a market environment where challenges and opportunities coexist, companies need to flexibly adjust strategies, strengthen research and development, and increase product added value to maintain competitive advantages. At the same time, the industry should actively respond to the call for environmental protection, promote sustainable development, and jointly build a healthy and stable market ecology.

Please note that the above analysis is based on currently available information and general market trends, and specific market conditions may vary due to changes in a variety of factors. For detailed market data and new developments, it is recommended to refer to new reports from professional market research institutions.

Extended reading:

CAS:2212-32-0 – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co., LTD

N,N-Dicyclohexylmethylamine – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co ., LTD

bismuth neodecanoate/CAS 251-964-6 – Amine Catalysts (newtopchem.com)

stannous neodecanoate catalysts – Amine Catalysts (newtopchem.com)

polyurethane tertiary amine catalyst/Dabco 2039 catalyst – Amine Catalysts (newtopchem.com)

DMCHA – morpholine

N-Methylmorpholine – morpholine

Polycat 41 catalyst CAS10294-43-5 Evonik Germany – BDMAEE

Polycat DBU catalyst CAS6674-22-2 Evonik Germany – BDMAEE

Physical and chemical properties of butyltin mercaptide

admin 7月 16th, 2024 News

Butylmercaptostannane is an organotin compound with a chemical formula of C4H10OSSn and a CAS number of 26410-42-4. As an important class of organometallic compounds, butyltin mercaptide plays an important role in the chemical and industrial fields, especially in the application of polyvinyl chloride (PVC) stabilizers.

Physical properties

Appearance and status: Tin butyl mercaptide usually appears as a colorless and transparent liquid, which is clear and free of impurities in its pure state.
Density: Its density is approximately 1.13 g/cm³, measured at room temperature (20°C).
Refractive index: At the same room temperature, the refractive index of butyltin mercaptide is approximately 1.580.
Melting point and boiling point: The specific values ??are not clearly stated in public information, but since it is in a liquid state at room temperature, it can be speculated that its melting point is lower than room temperature and its boiling point is higher than the normal use temperature.
Solubility: Butyltin mercaptide has good solubility in most organic solvents, such as dichloromethane, tetrahydrofuran, etc., but its solubility in water is limited.

Chemical properties

Thermal stability: Butyltin mercaptide has high thermal stability and can function under high temperature conditions of PVC processing, effectively inhibiting the thermal degradation of PVC.
Redox properties: Organotin compounds containing thiol groups (-SH) often show certain reducing properties and can react with oxidants.
Coordination ability: The thiol group in butyltin mercaptide can be used as a ligand to form a complex with metal ions, which is also one of its important mechanisms as a PVC stabilizer.
Reactivity: Reacts with unstable chlorine atoms in PVC to prevent dehydrochlorination reaction, thereby improving the thermal stability and processing performance of PVC.
Odor: Butyltin mercaptide may have a distinctive odor related to its thiol group, but its odor is generally considered to be milder than that of other sulfur-containing compounds.

Safety and environmental considerations

Toxicity: Organotin compounds usually have some toxicity, and butyltin mercaptide is no exception. Prolonged or heavy exposure may cause adverse effects on human health, especially on the nervous and reproductive systems.
Environmental Impact: Organotin compounds degrade slowly in the natural environment and may cause harm to aquatic life. Therefore, strict environmental protection regulations should be followed when using and handling products containing butyltin mercaptide.

Precautions for use

Due to its potential health and environmental risks, the use of tin butylmercaptide requires strict compliance with safety guidelines. In industrial production, operators should wear appropriate personal protective equipment such as gloves, protective glasses and respiratory masks to reduce the risk of direct contact and inhalation. In addition, discarded butyltin mercaptide and the products it contains should be disposed of in accordance with hazardous waste treatment standards to avoid environmental pollution.

Conclusion

Butyltin mercaptide, as a member of organotin stabilizers, plays an indispensable role in PVC processing with its unique physical and chemical properties. missing role. However, its use also comes with safety and environmental considerations, and appropriate precautions need to be taken to ensure user safety and environmental sustainability.

Extended reading:

CAS:2212-32-0 – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co., LTD

N,N-Dicyclohexylmethylamine – Manufacturer of N,N-Dicyclohexylmethylamine and N,N-Dimethylcyclohexylamine – Shanghai Ohans Co ., LTD

bismuth neodecanoate/CAS 251-964-6 – Amine Catalysts (newtopchem.com)

stannous neodecanoate catalysts – Amine Catalysts (newtopchem.com)

polyurethane tertiary amine catalyst/Dabco 2039 catalyst – Amine Catalysts (newtopchem.com)

DMCHA – morpholine

N-Methylmorpholine – morpholine

Polycat 41 catalyst CAS10294-43-5 Evonik Germany – BDMAEE

Polycat DBU catalyst CAS6674-22-2 Evonik Germany – BDMAEE

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