Novel technique for preparing long-chain alkane efficiently through multifunctional catalyst in one-step method

Abstract

The invention relates to a novel technique for preparing long-chain alkane efficiently through a multifunctional catalyst in a one-step method. The novel technique can be used for producing the long-chain alkane in one step with high selectively under a relative mild condition, and solve the problems of strict reaction condition, low energy efficiency and low alkane selectivity in a process of preparing the long-chain alkane by biomass derivatives. According to the technique, condensation products (C8, C9, C13 and C15) of a biomass derivative, namely furfural or HMF (Hydroxy Methyl Furfural), and acetone are taken as the raw materials, and by designing the three-center multifunctional catalyst of metal (I)-metal (II)-acid, the original two steps of independent reactions which require strict reaction conditions and need different catalysts to join in are combined into an one-step reaction which requires tender reaction conditions, so that the selectivity on corresponding alkane (octane, nonane, tridecane and pentadecane) is improved greatly, the highest yield can be 97%, and meanwhile, a step of separating the product from the catalyst is omitted, therefore, the energy efficiency of the while process is improved by a great step.

Description

technical field [0001] The invention belongs to the fields of chemical technology, catalytic chemistry and organic chemistry, and in particular relates to the technology of preparing liquid fuel from biomass derivatives in one-step method with a multifunctional catalyst. Background technique [0002] At present, 95% of the world's approximately 800 million tons of chemicals per year are produced from petroleum. As we all know, this non-renewable fossil energy will be exhausted in a foreseeable time, and the emission of a large amount of greenhouse gases will lead to global warming and a series of economic, political, and environmental problems. Renewable new energy has become a top priority (Chemical Review, 2006, 106: 4044-4098). In recent years, biomass resources have become the focus of research by scientists at home and abroad because of their cheapness, renewability, low pollution (reduction of greenhouse gases) and sustainable development. The development of biorefin...

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Problems solved by technology

[0006] In order to solve the problem of harsh reaction conditions, low energy efficiency and low selectivity of long-chain alkanes in the last two steps in the process of preparing long-chain alkanes from the above-mentioned biomass derivatives (i.e., hydrogenation saturation from condensation products, dehydration / hydrogenation to long-chain alkanes), etc. problem, we delved into the reaction mechanism of the last two steps

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