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Catalytic distillation tower member and its manufacture

A catalytic distillation column and component technology, which is applied to the structure of the internal components of the catalytic distillation column and the field of preparation thereof, can solve the problem of unfavorable gas-liquid mass transfer, ineffective catalytic distillation performance, and difficulty in coating catalyst active components and other problems, to achieve the effect of high separation performance, improved conversion and selectivity, large porosity and specific surface area

Inactive Publication Date: 2003-08-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ceramic honeycomb block used in this process is a rigid honeycomb structure with several parallel vertical holes, and the holes are independent of each other, which is not conducive to the mass transfer between gas and liquid, and the efficiency of catalytic distillation cannot be effectively exerted.
In addition, the filler has a rigid honeycomb block, which is not easy to coat the catalyst active component

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Take the Al with a mass fraction of 70% 2 o 3 Mix with 20% distilled water, then add 10% starch, after mixing and ball milling for 6 hours, get uniformly dispersed mud, then adjust its pH value to 6 with hydrochloric acid; select the designed mold to extrude the prepared mud billet Forming to obtain a corrugated plate blank with a peak height of 6mm, a wave pitch of 12mm, a corrugation inclination angle of 45°, and a wall thickness of 0.8mm. There are holes of φ4mm on the corrugated plate wall. The formed blank is dried at room temperature after shaping, and then the dried blanks are assembled. When assembling, the corrugations of two adjacent fillers intersect at 90°, and the crests of the adjacent two fillers are connected with water glass. Each piece is assembled to form a φ100×100mm structured packing disc; finally, the structured packing assembled into the disc is put into a kiln for roasting, and sintered at 800-900°C to obtain a porous ceramic structured packing...

Embodiment 2

[0036] The porous ceramic structured packing prepared in Example 1 was used as a matrix, and its surface was modified. Immerse the φ100×100mm porous ceramic structured packing disc in the aluminum hydroxide suspension, take it out after 20 hours, and bake it at 1100°C for 12 hours. During the firing process, the coated aluminum hydroxide undergoes a phase transition, and finally α-type alumina is obtained. α-Al 2 o 3 The specific surface area of ​​the surface-modified substrate is 550m 2 / m 3 .

Embodiment 3

[0038] The substrate for forming the modified layer obtained in Example 2 was coated with metal palladium to prepare a hydrogenation catalyst. Prepare palladium chloride or palladium nitrate aqueous solution according to the palladium content of 0.5% (weight), adjust the pH value to 5.0-6.5, use a suitable sprayer to spray on the modified substrate preheated to 40-60°C, and then dry at 120°C. The palladium-loaded filler is fired at 350-500°C, preferably no more than 500°C. The general roasting time is 10 hours. Then use hydrogen-containing gas to reduce the catalyst for 12 hours at a suitable pressure and 60-120° C. to obtain a filler containing catalyst active components.

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Abstract

The catalytic distillation tower member consists of base body, modified layer and activating layer and features the base body made of regular porous ceramic stuffing, the modified layer being coating formed through surface treatment of the base body with alpha-alumina, and the activating layer comprising active catalyst component coated to the modified layer. The catalyst distillation tower member integrates the distilling stuffing and catalyst; has high efficiency, enough gas-liquid contact area, efficient mass transfer between the gas phase and the liquid phase, and excellent reaction and separation effect; and is convenient in assembling and disassembling and suitable for industrial application.

Description

technical field [0001] The invention relates to a catalytic distillation tower component used in the field of petrochemical industry, in particular to a structure of the catalytic distillation tower internal component in a catalytic distillation process and a preparation method thereof. Background technique [0002] Catalytic distillation technology is a new chemical engineering method developed in recent years. This technology integrates catalytic process and distillation process, so that the operation process of reaction and separation can be carried out simultaneously in the same column. This process can continuously separate and remove the reaction products from each reaction unit, and can also use the heat of reaction as the heat of vaporization required for the distillation process. Catalytic distillation technology has a series of advantages such as high conversion rate, good selectivity, low energy consumption, high product purity, easy operation, and low investment....

Claims

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Application Information

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IPC IPC(8): B01J19/32
Inventor 戴伟李东风廖丽华陈硕程建民
Owner CHINA PETROLEUM & CHEM CORP
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