Technology for synthesizing isoprene with olefine aldehyde

A technology of isoprene and process technology, which is applied in the field of petrochemical industry, can solve the problems of low raw materials, high index requirements, and high consumption of metal materials, and achieve low waste water and waste gas emissions, promote the development of deep processing, and low raw material index requirements Effect

Inactive Publication Date: 2013-12-25
SHANDONG KENLI PETROCHEM GRP
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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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  • Technology for synthesizing isoprene with olefine aldehyde
  • Technology for synthesizing isoprene with olefine aldehyde
  • Technology for synthesizing isoprene with olefine aldehyde

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Embodiment Construction

[0026] Attached figure 1 , Attached figure 2 , Attached image 3 , Attached Figure 4 , To further describe the present invention:

[0027] A process technology for the synthesis of isoprene from alkenals is composed of methanol-formaldehyde units and liquid-phase alkenal synthesis units.

[0028] 1) Methanol to formaldehyde unit

[0029] The oxidation of methanol to formaldehyde consists of an air compression process, a reaction process, a formaldehyde absorption process and a steam generation process. The raw material methanol from the methanol tank area is first compressed into the methanol storage tank, and then enters the methanol evaporator 2 through the methanol feed pump 1. This exchanges heat with the hot water sent by the hot water pump 31, the methanol absorbs heat and vaporizes, and at the same time it mixes with the gas brought by the fan 32 to form the raw material gas. The raw material gas is overheated by the methanol superheater 4 and then enters the methanol o...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/18C07C1/20
Inventor 王全平姚秀伟宋爱民王发明季其华迟建光刁旺梅
Owner SHANDONG KENLI PETROCHEM GRP
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