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Removal method of pentone in C5 fraction

A C5 fraction, medium isoprene technology, applied in chemical instruments and methods, hydrocarbon, hydrocarbon purification/separation, etc., can solve the problem of increasing energy consumption, reducing isoprene yield, and improving operation severity and other problems, to achieve the effect of reducing energy consumption, reducing operational severity, and improving product quality

Inactive Publication Date: 2018-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the main impurity in the polymer grade isoprene is three kinds of 2-butyne, isopentenyne and cyclopentadiene, the use of carbon five cuts will improve the content of isopentenyne in the raw material, if to meet The requirement that the isoprenyne content in polymer grade isoprene products be less than or equal to 15 mg / kg will inevitably increase the operating severity and increase energy consumption; and if the C5 fraction is separated from the device as a by-product, the isoprene content will be significantly reduced. Pentadiene yield

Method used

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  • Removal method of pentone in C5 fraction
  • Removal method of pentone in C5 fraction
  • Removal method of pentone in C5 fraction

Examples

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Embodiment 1～10

[0022] 1. Raw material of C5 distillate

[0023] The C5 fractions used in Examples 1 to 10 come from a part of the material produced by the C5 separation device when producing isoprene. The components of the C5 fraction are shown in Table 1.

[0024] Table 1. C5 Fraction Composition

[0025] components

C5 fraction

Total C4,%

0.02

3-Methylbutene-1,%

0.01

1.4-Pentadiene,%

0.02

2-Butyne,%

0.17

Isopentenyne,%

2.25

2-Methylbutene-1,%

0.02

Isoprene,%

96.56

2-Methylbutene-2,%

0.06

Cyclopentadiene,%

0.00

Cyclopentene,%

0.00

Other C5,%

0.00

Dimethylamine,%

0.35

pH

10

[0026] 2. Dimethylamine removal of C5 fraction

[0027] The size of the water washing tower for removing dimethylamine from the carbon five fraction is It is carried out in a stainless steel tube, and 100 grams of spherical sulfonic acid-based cation exchange resin cataly...

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Abstract

Belonging to the technical field of organic chemical industry, the invention in particular relates to a removal method of pentone in C5 fraction. The method specifically includes the steps of: (1) subjecting C5 fraction to nitrogen removal treatment by a fixed bed loaded with sulfonic cation exchange resin and water; and (2) conducting selective hydrogenation on the nitrogen removed isoprene material by a bubbling bed reactor loaded with a partially vulcanized Pb series catalyst to convert pentone into isoprene. The method provided by the invention has the advantages of simple technological operation, high nitrogen removal precision, high pentone conversion rate, and small isoprene loss, and can effectively improve the product quality of isoprene.

Description

technical field [0001] The invention belongs to the technical field of organic chemical industry, and in particular relates to a method for removing prenyne from carbon five fractions. Background technique [0002] In the process of producing ethylene by steam cracking of naphtha, a considerable amount of carbon five fractions are by-produced, and the carbon five fractions can be separated to produce piperylene, isoprene and dicyclopentadiene products, these three diolefins Due to its special molecular structure and active chemical properties, it can be transformed into a series of chemical products with higher added value after downstream processing. [0003] In the process of producing isoprene in the C5 separation device, two extraction and rectification processes using N,N-dimethylformamide (hereinafter referred to as DMF) as the extraction agent are usually used to refine isoprene, extract The function of the agent is to change the relative volatility of each component...

Claims

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Application Information

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IPC IPC(8): C07C7/00C07C7/12C07C7/167C07C11/18
CPCC07C7/005C07C7/12C07C7/167C07C11/18
Inventor 常慧陆鑫曹强叶军明夏蓉晖孙骏瞿卫国方玲
Owner CHINA PETROLEUM & CHEM CORP
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