Modified poly(vinylpyrrolidone)

Replacement of conventional, toxic and polluting Brönsted and Lewis acidic catalysts with eco-friendly reusable solid acid catalysts is an essential requirement in the development of green chemistry. Solid acid catalysts due to having all factors which are important in industry such as ease of the product separation, and recycling of the catalyst, and also environmental compatibility can be replaced with conventional Brönsted and Lewis acid catalysts [1]. The combination of high efficiency of the catalyst with its easy separation from the reaction products and the possibility of recycling is one of the key goals in the design of a new catalyst. Cross-linked polymers with providing the above mentioned requirements can play an important and useful role in chemistry.