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Production method of propylene

A production method and technology of propylene, applied in the field of propylene production, can solve the problems of low propylene yield and achieve the effect of improving selectivity

Active Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is the problem of low propylene yield in the existing methanol-to-propylene technology, and a new propylene production method is provided, which has the advantage of high propylene yield

Method used

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  • Production method of propylene
  • Production method of propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] After mixing 100 grams of NaZSM-5 with a silicon-aluminum ratio of 900 and a small amount of extrusion aid, add alumina as a binder so that the weight ratio of alumina to the entire catalyst is 50%. After adjusting to a suitable humidity, extrude into strips with a diameter of 1 mm. After the sample was calcined at 600°C for 3 hours, it was exchanged with 5% ammonium nitrate solution at 90°C for 2 hours, and the exchange was repeated three times to obtain ammonium ion type ZSM-5, and the ammonium ion type sample was calcined at 550°C for 4 hours to obtain catalyst A.

[0023] After mixing 100 grams of NaZSM-5 with a silicon-aluminum ratio of 300 and a small amount of extrusion aid evenly, add silicon oxide as a binder so that the weight ratio of silicon oxide to the entire catalyst is 20%. After adjusting to a suitable humidity, squeeze into strips with a diameter of 1 mm. After the sample was calcined at 600°C for 3 hours, it was exchanged with 5% ammonium nitrate sol...

Embodiment 2～12

[0028] Change the operating parameter of reactor 3 by the condition of embodiment 1, adopt following steps to react:

[0029] (a) taking at least one of methanol and dimethyl ether as a raw material, contacting with molecular sieve catalyst A in reactor (1) to generate water, dimethyl ether and methanol effluent I; (b) effluent I in the reactor (2) contact with molecular sieve catalyst B again to generate effluent II containing propylene, ethylene, carbon four, carbon five and carbon six or more components; (c) after the effluent II enters the separation system to separate propylene, it will Ethylene, C4 and C5 by-products are sent into the reactor (3) to contact with molecular sieve catalyst C to generate propylene-containing stream III; (d) stream III is sent to the separation system to separate the product propylene, and the separated C2, C5 Four and carbon five are recirculated into the reactor (3) for reaction. The results are listed in Table 1.

[0030] Table 1

[003...

Embodiment 13～16

[0033] React according to the conditions and steps of Example 9, but change the operating parameters of Reactor 2, and the results are listed in Table 2.

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Abstract

The invention relates to a production method of propylene. The production method mainly solves the problem of low propylene yield in the prior art for preparing olefins from methanol. Through the adoption of the production method of the propylene, at least one kind of materials from methanol and dimethyl ether is used as raw materials to be in contact with molecular sieve catalysts A in a reactor (1) to produce water, dimethyl ether and first methanol effluent, the first effluent is in contact with molecular sieve catalysts B in a reactor (2) to produce second effluent comprising propylene, ethylene, C4, C5, C6 and higher-carbon-content ingredients, and after the propylene is separated from the second effluent, propylene, the C4 and C5 byproducts are sent into a reactor (3) to be in contact with molecular sieve catalysts C to produce the propylene. Through the technical scheme, the problem is perfectly solved, and the production method can be used in the industrial production of the propylene.

Description

technical field [0001] The present invention relates to a production method of propylene. Background technique [0002] Propylene is an important basic organic raw material second only to ethylene, and it has a wide range of uses. It can be used to produce polypropylene, acrylonitrile, propylene oxide, cumene, acrylic acid, isopropanol, glycerin, acetone, phenol, acrolein, epichlorohydrin and other products, among which polypropylene is the most important downstream products. At present, propylene and ethylene are mainly derived from naphtha steam cracking and catalytic cracking, and the main raw materials are still petroleum hydrocarbons. As petroleum resources are becoming scarcer and more expensive, the contradiction between supply and demand of propylene and ethylene has become increasingly prominent. Therefore, developing an economically feasible non-petroleum route to increase the production of light olefins such as propylene and ethylene is urgently pursued by comme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/06C07C1/20C07C6/04
CPCY02P30/42Y02P30/20Y02P30/40
Inventor 赵国良滕加伟徐建军金照生
Owner CHINA PETROLEUM & CHEM CORP
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