Technology for synthesizing isoprene with olefine aldehyde

Abstract

The invention relates to a technology for synthesizing isoprene with olefine aldehyde. The technology adopts a unit for preparing formaldehyde from methanol and a liquid phase olefine aldehyde synthesis unit, wherein 1) the unit for preparing formaldehyde from methanol comprises an air compression process, a reaction process, a formaldehyde absorption process and a steam generation process; 2) the liquid phase olefine aldehyde synthesis unit: TMC from a TMC preparation unit and dioxane fractions from a dioxane preparation unit enter isoprene reactors together, the materials after reaction enter a precipitation tank to be precipitated, the materials at the bottom of the tank are pumped out by a pump and are sent to a dehydrating tower of the dioxane preparation unit to be circulated, the materials at the bottom of the tower enter a fractionating tower and an isoprene monomer is obtained on the top of the fractionating tower and then enters a synthetic rubber unit. The technology has the beneficial effects of reducing the isoprene production cost, improving the purity of isoprene and reducing the wastewater and waste gas emission in the technology.

Description

Technical field [0001] The invention relates to a petrochemical technology, in particular to a process technology for synthesizing isoprene from enal. Background technique [0002] Isoprene is an important monomer for synthetic rubber. Mainly used to synthesize isoprene rubber and SIS. Secondly, it is used as a comonomer in the synthesis of butyl rubber to improve the vulcanization properties of butyl rubber. Isoprene is also used in the manufacture of pesticides, medicines, perfumes and adhesives. Recently, the production of a variety of fine chemicals using isoprene as raw material has been industrialized. It can be said that from the preparation of isoprene to the utilization of isoprene, especially the utilization of isoprene derivatives has been formed A new subject---isoprene chemistry. [0003] The industrial production methods of isoprene can be summarized as catalytic dehydrogenation methods using isoamylene and isoamyl kang as raw materials, and extractive distillatio...

AI Technical Summary

Problems solved by technology

[0005] The product obtained by the dioxane method has high purity, relatively low requirements for raw materials, and high device performance. The main disadvantages are: the need to recover formaldehyde, high energy consumption, and accompanied by a large number of by-products and a large amount of waste water and waste gas discharge. into the atmosphere

The disadvantage of this method is that the consumption of metal materials is high, the performance of the device is low, the index requirements for raw materials are high, and there are no qualified by-products

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