Multistage feeding semi-regenerating catalytic reforming method

A catalytic reforming and semi-regenerative technology, applied in the catalytic reforming of naphtha, etc., can solve the problem of no fresh feed, and achieve the effect of reducing the amount of carbon deposits, prolonging the service life, and evenly distributing the amount of carbon deposits.

Active Publication Date: 2008-02-06
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The purpose is to eliminate the problem of "sticking to the wall" during the catalyst flow process in the radial reactor of the continuous refo

Method used

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  • Multistage feeding semi-regenerating catalytic reforming method

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Experimental program
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Effect test

example 1

[0029] The pre-refined reformed raw material is dehydrated through a container equipped with molecular sieves under a pressure of 0.05-0.1 MPa, and its water content is controlled to be ≤3ppm.

[0030] A 100ml reforming test device with two reactors connected in series is used, and the device is equipped with a molecular sieve drying system for removing water in circulating hydrogen. The catalyst loading capacity of the first reactor is 20 ml, and the catalyst loading capacity of the second reactor is 30 ml. A hydrogen circulation is established in the reaction system, and the temperature is raised under the conditions of a pressure of 1.0 MPa and a gas / agent volume ratio of 2000 / 1. When the reactor inlet temperature was 400°C, the raw material A after dehydration was introduced into the first reactor, and the feeding amount was 70ml / hr; then the raw material B was introduced into the second reactor, and the feeding amount was 30ml / hr, and the The feed amount was 30% by volum...

example 2

[0032] The method for adopting example 1 adopts two-stage feed to carry out catalytic reforming, and difference is that raw material A enters the feed rate of the first reactor is 80ml / hr, and raw material B enters the feed rate of the second reactor is 20ml / hr, The feed amount of raw material B is 20% by volume of the total feed amount, and the results are shown in Table 2.

example 3

[0034] The method for example 1 adopts two-stage feed to carry out catalytic reforming, and difference is that what introduces the second reactor is raw material C, and the feeding amount that raw material A enters the first reactor is 95ml / hr, and raw material C enters the second The feed rate of the reactor was 5ml / hr, and the feed rate of raw material C was 5% by volume of the total feed rate. The results are shown in Table 2.

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Abstract

A multi-section feeding semi-regenerated catalysis reforming method includes that the first stream of raw material is passed into the first section reactor of a reforming device, the second stream of raw material is mixed with the product got out from the front section reactor, and then is passed into the rear section reactor, the second stream of raw material is 1 to 30 bulk percent of the total volume of the reforming reaction raw material, the cyclane content in the second stream of raw material is larger than that in the first stream of raw material. The method can reduce the carbon distribution on the catalyst in the rear section reactor, so as to enable the carbon distribution volume in each reactor in the reforming device to be distributed evenly, thereby the operation period of the whole semi-regenerated reforming device can be prolonged.

Description

[0001] Technology area [0002] The invention is a method for catalytic conversion of hydrocarbons with multi-stage feed, in particular, a method for semi-regenerative catalytic reforming with multi-stage feed. Background technique [0003] Catalytic reforming is an important process that uses naphtha as raw material to produce high-octane gasoline or aromatics, and produces cheap hydrogen by-products. It is divided into semi-regenerative catalytic reforming and continuous reforming, of which semi-regenerative catalytic reforming Generally, 3 to 4 reactors are used, and the same or different types of platinum-containing double / multi-metal reforming catalysts are filled in each reactor. [0004] In the existing fixed-bed semi-regenerative reforming process, hydrorefined naphtha is mixed with hydrogen and passed through each reactor in turn. In the Magna reforming process developed by Engelhard in the United States, the recycled hydrogen from semi-regenerative reforming is divi...

Claims

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Application Information

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IPC IPC(8): C10G35/04
Inventor 张新宽任坚强张大庆纪长青赵燕京周硕鹏
Owner CHINA PETROLEUM & CHEM CORP
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