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Preparation method for isoprene and limonene

A technology of isoprene and isoprenoid, applied in the field of preparation of isoprene and limonene, can solve the problem of low production yield of limonene

Inactive Publication Date: 2013-10-23
HITACHI ZOSEN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the content of limonene in the four oranges is high, it does not exceed 4400ppm, and the production yield of limonene is low

Method used

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  • Preparation method for isoprene and limonene
  • Preparation method for isoprene and limonene
  • Preparation method for isoprene and limonene

Examples

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preparation example Construction

[0033] The preparation method of isoprene and limonene of the present invention includes the step of thermally decomposing a biopolymer mainly composed of isoprenoid. In the method of the present invention, one of isoprene and limonene, or both of isoprene and limonene are produced by the thermal decomposition step.

[0034] In this specification, the so-called isoprene refers to the structural formula CH 2 =C(CH 3 )CH=CH 2 hydrocarbons with two double bonds. There are three types of limonene, d-body, l-body and d / l-body, each of which is composed of two isoprene units. The d-body and the l-body are represented by the following general formula (I).

[0035] [chemical formula 1]

[0036]

[0037] A biopolymer with isoprenoid as the main component is a biopolymer biosynthesized using pentenyl pyrophosphate as an intermediate. The pentenyl pyrophosphate is composed of isopentenyl Diene units are connected continuously, and the pentenyl pyrophosphate is biosynthesized by ...

Embodiment

[0056] Below, refer to figure 2 , the present invention will be described in detail through examples, but the present invention is not limited to these examples.

[0057] As a raw material biopolymer, Eucommia rubber purified product 1 obtained by the method described in JP-A-2009-221306 was used. It is mainly composed of trans-type terpenoids, with a weight average molecular weight of 10 3 ~10 6 . The NMR (nuclear magnetic resonance) spectrum and structural formula of the raw materials are as follows image 3 shown.

[0058] Use a pulverizer to pulverize the raw materials, sieve through a sieve with a pore size of 2 mm, and select pulverized materials smaller than 2 mm. Fill 5 kg of crushed and sieved raw materials into the raw material storage tank 1 (filled with nitrogen in advance). Simultaneously with the start of the feedstock filling, the nitrogen filling was terminated.

[0059] Using the raw material supply device 2, the raw material filled in the raw material...

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Abstract

The invention provides a method for preparing isoprene and limonene with high efficiency and low influence on the environment, in which the biomass material is neutralized by carbon. The preparation method for isoprene and limonene comprises a process of thermal decomposition of a biopolymer which takes isoprenoid as a main component.

Description

technical field [0001] The invention relates to a preparation method of isoprene and limonene. Background technique [0002] At present, chemical raw materials such as isoprene and limonene have been synthesized from petroleum raw materials. In the production methods of isoprene described in Patent Document 1 and Patent Document 2, isobutylene, tert-butanol, formaldehyde, and water are continuously or intermittently supplied to an acidic aqueous solution, and isoprene is produced from the reaction mixture. As raw materials used in this method, isobutene, tert-butanol, formaldehyde, etc. are all petroleum-based raw materials. If the use cycle of the final product produced from isoprene is to be terminated, incineration treatment is required to emit carbon dioxide. The preparation method is a preparation method that requires high energy input in the preparation process and has a large impact on the environment. [0003] In the future, carbon-neutral biomass raw materials are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/18C07C13/21C07C1/00
Inventor 中泽庆久福岛龙太郎田中新吾
Owner HITACHI ZOSEN CORP
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