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Isoolefine production method

A production method and technology for isoolefins, which are applied in the field of preparing isoolefins directly by cracking tertiary alkyl ethers, can solve problems such as large energy consumption, and achieve the effects of improving economic benefits, facilitating operation and separation, and reducing energy consumption.

Active Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of large energy consumption in the prior art, the present invention provides an improved production method of tertiary alkyl ether synthesis and cracking joint production of isoolefins, which can reduce the consumption of cooling water and heating steam of the device, That is, to reduce the energy consumption of the whole device

Method used

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Embodiment 1

[0050] The raw material mixed C4 is the product of the ethylene cracking unit (the cracked C4 raw material after the removal of diene comes from the first chemical plant of Yanshan Branch of Sinopec, the same below), and the mixed C4 hydrocarbons and methanol containing isobutene pass through pipelines 1 and 2 respectively. and 3 enter the etherification reactor R1, the content of isobutene in the mixed carbon four hydrocarbons is about 20.1% (weight), the raw material amount entering the etherification reactor is 100kg / h, Amberlyst 15 solid is housed in the etherification reactor R1 Acid resin catalyst (produced by ROHM & HAAS), the reaction temperature of etherification reactor R1 is 60°C, the reaction pressure is 1.2MPa, and the space velocity of etherification reactor is 6hr -1 . The weight ratio of methanol and isobutene entering the etherification reactor was 0.6. The etherification product P1 enters the first fractionation tower C1 through the pipeline 4. The operating...

Embodiment 2

[0057] The mixed carbon four hydrocarbons containing isobutene and methyl alcohol enter etherification reactor R1 through pipeline 1, 2 and 3 respectively, and the content of isobutene in the mixed carbon four hydrocarbons is 20.1% (weight), and the raw material amount that enters etherification reactor is 100kg / h, Amberlyst 15 solid acid resin catalyst (produced by ROHM & HAAS) is installed in the etherification reactor R1, the reaction temperature of the etherification reactor R1 is 60°C, the reaction pressure is 1.2MPa, and the space velocity of the etherification reactor is 6hr -1 . The weight ratio of methanol and isobutene entering the etherification reactor was 0.6. The etherified product P1 enters the first fractionation tower C1 through the pipeline 4. The operating pressure of the first fractionation tower C1 is 0.9MPa. Send into the second fractionating tower C2 through pipeline 6, the operating pressure of the second fractionating tower C2 is 0.5MPa, and the theo...

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Abstract

The invention discloses an isoolefine production method comprising the following procedures: the tower top product of a second fraction column is obtained in gas phase; and the gas is heated to an ether cracking reaction temperature and enters into an ether cracking reaction vessel after compression. Therefore, gas phase condensation and repeated heating are avoided, required recirculated water and steam are less, the equipment energy consumption is lower, the operating pressure of the second fraction column is lower, the separation effect of the fraction column is improved, and the operation is facilitated. In the isoolefine production method, the gas phase reaction product at the outlet of the ether cracking reaction vessel is compressed to serve as the heat source for a fifth fraction column reboiler, and is sent to a third fraction column after condensation, so that the total steam amount and the recirculated water amount are reduced, and the equipment energy consumption is further lowered.

Description

technical field [0001] The present invention relates to a production method of isoolefins, furthermore, it relates to preparing high-purity tertiary alkyl ethers by reacting mixed hydrocarbons containing at least one isoolefin and at least one alcohol, and then preparing isoolefins by cracking tertiary alkyl ethers. olefins or directly by cracking tertiary alkyl ethers to prepare isoolefins. Background technique [0002] Isoolefins and tertiary alkyl ethers are important raw materials for fine chemicals, as well as important intermediate raw materials or monomers for synthetic rubber and synthetic resins. For example, high-purity isobutylene is widely used in the production of butyl rubber, polyisobutylene and methyl methacrylate, etc. A variety of chemical products; Methyl tert-butyl ether (MTBE) is not only a raw material for producing high-purity isoolefins, but also an important additive to increase the octane number of fuel. [0003] Using tertiary alkyl ether cracking...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C1/20C07C11/02C07C11/09
Inventor 罗继红沈贻芳张建新周继东吴瑾孙康
Owner CHINA PETROLEUM & CHEM CORP
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