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Method for realizing increase production of butadiene

A technology of butadiene and butene, which is applied in the direction of chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve the problems of different conversion rates and low yield of butadiene, achieve high conversion rates, eliminate waste Carbon, the effect of improving the yield

Active Publication Date: 2013-05-08
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The technical problem that the present invention mainly solves is that in the prior art, due to 1-butene in the n-butene raw material, cis 2-butene, three kinds of isomers of trans 2-butene are converted under the same catalyst condition. The problem that the yield of butadiene is not high due to different methods provides a new method for increasing the production of butadiene, which has the ability to make the three isomers in the n-butene raw material have a higher conversion rate, thereby obtaining Advantages of Higher Butadiene Yield

Method used

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  • Method for realizing increase production of butadiene
  • Method for realizing increase production of butadiene
  • Method for realizing increase production of butadiene

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Effect test

Embodiment 1

[0032]A 100,000 tons / year butene oxidative dehydrogenation to butadiene plant, the raw material butene composition is shown in Table 1, using figure 1 The process technology, the reactor has two sections, both of which are axial fixed bed reactors, the first section of the reactor is filled with iron-based oxide catalyst I, the main composition of iron, zinc, magnesium ratio (mole): Fe: Zn : Mg=10:3:6, the second stage reactor is filled with molybdenum-bismuth catalyst, the main composition is molybdenum, bismuth, iron, cobalt ratio (weight): Mo:Bi:Fe:Co=10:4:3: 6, the auxiliary agent is Sn, W, and the carrier is Al 2 o 3 , the feed rate is 20000kg / h, the total amount of air is 45600 kg / h, divided into 2 shares, the first stage of air is 32600 kg / h, the second stage of air is 13000kg / h, the amount of water vapor is 77000 kg / h, butene raw material and air, water After the steam is mixed according to the ratio of butene: oxygen: water (mol) of 1:0.60:12, it enters the first-st...

Embodiment 2

[0039] A 100,000 tons / year butene oxidative dehydrogenation to butadiene plant, the raw material butene composition is shown in Table 1, using figure 1 The process technology, the reactor has two sections, both of which are radial fixed bed reactors, the first section of the reactor is filled with iron-based oxide catalyst I, the main composition of iron, zinc, magnesium ratio (mole): Fe: Zn : Mg=10:3:6, the second stage reactor is filled with molybdenum-bismuth catalyst, the main composition is molybdenum, bismuth, iron, cobalt ratio (weight): Mo:Bi:Fe:Co=10:2:2.5: 5, the additive is Zn, the carrier is Al 2 o 3 , the feed rate is 20000kg / h, the total amount of air is 45600 kg / h, divided into 2 shares, the first stage of air is 32600 kg / h, the second stage of air is 13000kg / h, the amount of water vapor is 51400 kg / h, butene raw material and air, water After the steam is mixed according to the ratio of butene: oxygen: water (mol) of 1:0.60:8, it enters the first-stage reactor...

Embodiment 3

[0044] A 100,000 tons / year butene oxidative dehydrogenation to butadiene plant, the raw material butene composition is shown in Table 4, using figure 1 The process technology, the reactor has two sections, both of which are axial fixed bed reactors, the first section of the reactor is filled with iron-based oxide catalyst I, the main composition of iron, zinc, magnesium ratio (mole): Fe: Zn : Mg=10:2:3, the second stage reactor is filled with molybdenum-bismuth catalyst, the main composition is molybdenum, bismuth, iron, cobalt ratio (weight): Mo:Bi:Fe:Co=10:2:2.5: 6, the additive is Sn, the carrier is SiO 2 , the feed rate is 20000kg / h, the total amount of air is 45600 kg / h, divided into 2 shares, the first stage of air is 32600 kg / h, the second stage of air is 13000kg / h, the amount of water vapor is 77000 kg / h, butene raw material and air, water After the steam is mixed according to the ratio of butene: oxygen: water (mol) of 1:0.60:12, it enters the first-stage reactor at ...

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Abstract

The invention relates to a method for realizing the increase production of butadiene, which mainly solves the problem that the yield of the butadiene is not high because the conversion rates of 1-butene, cis-2-butene and reverse 2-butene as three isomers in the n-butene are different under the condition of utilizing the same catalyst in the prior art. According to the method, two segments of adiabatic and isothermal fixed bed reactors connected in series are adopted; butene, oxygen-containing gas and water vapor as raw materials enter the first segment of the reactor A filled with a catalyst I according to definite proportion; and after a heat exchange treatment is carried out on the gas at an outlet of the first segment of the reactor A, the gas is mixed with the supplemental oxygen-containing gas, and then mixed gas enters the second segment of the reactor B filled with a catalyst II according to definite proportion. Therefore, based on the technical scheme that the the catalyst I has high conversion rate for the 1-butene and the cis-2-butene and the catalyst II has high conversion rate for the reverse 2-butene, the problem is solved well. As a result, the method provided by the invention can be used for the industrial production of the butadiene by the oxidative dehydrogenation of the n-butene.

Description

technical field [0001] The invention relates to a method for increasing the production of butadiene. Background technique [0002] Butadiene is an important monomer of synthetic rubber and synthetic resin, mainly used in the synthesis of butadiene rubber, styrene-butadiene rubber, nitrile rubber and ABS resin. Butadiene is also a variety of coatings and organic chemical raw materials. [0003] At present, butadiene is mainly produced in two ways: separation of C4 fractions and synthesis (including butane dehydrogenation, butene dehydrogenation, butene oxidative dehydrogenation, etc.). At present, except the United States, almost all butadiene in the world comes directly from the by-product C4 fraction (also written as C4 fraction) when hydrocarbon cracking is used to produce ethylene. About half of the sources of butadiene in the United States come from the dehydrogenation of butane and butene, and half come directly from cracking C4 fractions. [0004] Oxidative dehydrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/16C07C5/48
Inventor 刘文杰郭毅
Owner CHINA PETROLEUM & CHEM CORP
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