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Method for separating solid catalyst from slurry in slurry state bed F-T synthesis technology

A solid catalyst and synthesis process technology, applied in separation methods, chemical instruments and methods, filtration and separation, etc., can solve problems such as energy consumption, and achieve the effects of reducing operating costs, lowering separation temperatures, and simplifying separation processes

Active Publication Date: 2012-07-18
CHINA PETROLEUM & CHEM CORP +2
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  • Description
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Problems solved by technology

Hydrogen stripping is a very complicated wax removal process, and each step has strict requirements for heating and constant temperature, which not only consumes energy but also takes time

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  • Method for separating solid catalyst from slurry in slurry state bed F-T synthesis technology
  • Method for separating solid catalyst from slurry in slurry state bed F-T synthesis technology
  • Method for separating solid catalyst from slurry in slurry state bed F-T synthesis technology

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Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0043] Such as figure 1 Shown, the separation method of solid catalyst and slurry in this slurry bed F-T synthesis technique is as follows:

[0044] The catalyst suspension with a weight of 15% to 17% is taken out from the slurry bed reactor, and sent to a primary filter 1 for filtration. The liquid part after filtering, that is, the wax liquid contains about 20 ppm of catalyst, and the product wax obtained after filtering is sent to the fine filter of the product wax liquid.

[0045] After primary filtration, a catalyst filter cake containing 19-21% of the slurry weight is obtained on the filter screen. When the filter pressure difference is greater than 0.1Mpa or after a batch of filtration operations are completed, the solvent from the solvent tank 2 washes the filter cake at a pressure 0.3Mpa higher than the pressure in the primary filte...

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Abstract

The invention provides a method for separating solid catalyst from slurry in a slurry state bed F-T synthesis technology, which comprises the following steps of: firstly, transporting suspending liquid taken out of a slurry state bed into a first-stage filter to be filtered, washing catalyst slurry by solvent, transporting the washed solvent and the catalyst into a first wax dissolving device, dissolving for 120-240 minutes under 35-160 DEG C, secondly filtering the slurry and secondly dissolving, and transporting the slurry into a redox reactor to be regenerated after stopping the second dissolving. The method provided by the invention is simple, and economical, and the energy consumption can be greatly reduced.

Description

technical field [0001] The invention relates to a chemical process, in particular to a method for separating a solid catalyst and a slurry in a slurry bed F-T synthesis process. Background technique [0002] The slurry bed reactor, also known as the three-phase bed reactor, is a commonly used chemical synthesis reactor. The solid catalyst particles are suspended in the slurry, and the reaction gas bubbles into the solvent and passes through the solvent layer to reach the surface of the catalyst to react. [0003] The F-T synthesis process is a liquid hydrocarbon synthesis technology invented by F.Fischer and H.Tropsch in the 1930s. This process uses the synthesis gas generated by coal or natural gas as the raw material, and the product wax, that is, the number of carbon atoms is 10 to 60. The alkane is a slurry, and the synthesis gas with a certain carbon-to-hydrogen ratio is bubbled into the slurry bed reactor, and the liquid hydrocarbon is generated through the reaction o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D37/00
Inventor 李管社韩梅吴伟伟周华辉雷永杰黄莉蓉曹红英
Owner CHINA PETROLEUM & CHEM CORP
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