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Preparation method of low-density protection catalyst suitable for coal tar hydrogenation

A catalyst and low-density technology, applied in the field of catalysis, can solve the problems of main catalyst pollution and poisoning, loss of hydrogenation activity, etc., achieve the effect of reducing product consumption, reducing use cost and improving product effect

Pending Publication Date: 2021-12-03
山东高德鲁田催化剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the impurity exceeds the holding capacity of the protective agent, it will penetrate the protective agent into the rear main catalyst of the reaction device, pollute and poison the main catalyst, and lose hydrogenation activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The present invention proposes a method for preparing a low-density protection catalyst suitable for coal tar hydrogenation, comprising the steps of:

[0020] The first step: firstly put pseudo-boehmite together with kale powder and hydroxymethyl cellulose in a kneader, and dry mix for 10 minutes. The mass ratio of pseudo-boehmite, kale powder and hydroxymethyl cellulose is 100:1:1, the specific surface of the pseudo-boehmite used is 200-320m 2 / g, the pore volume is 0.8~1.2ml / g;

[0021] The second step: take deionized water and inorganic acid for solution preparation, and adjust the pH value of the solution to 2~4, then add the prepared solution into the kneader, knead until the product is a lump material, and then adjust the addition of water Measure until the dry humidity of the product is 20%-30%;

[0022] Step 3: Transfer the prepared lump material to the extruder, select a 5.0mm five-rack module, and extrude it into a five-rack catalyst carrier;

[0023] Step ...

Embodiment 2

[0028] The present invention proposes a method for preparing a low-density protection catalyst suitable for coal tar hydrogenation, comprising the steps of:

[0029] The first step: firstly put pseudo-boehmite together with kale powder and hydroxymethyl cellulose in a kneader, and dry mix for 10 minutes. The mass ratio of pseudo-boehmite, kale powder and hydroxymethyl cellulose is 100:1:1, the specific surface of the pseudo-boehmite used is 200-320m 2 / g, the pore volume is 0.8~1.2ml / g;

[0030] The second step: take deionized water and inorganic acid for solution preparation, and adjust the pH value of the solution to 2~4, then add the prepared solution into the kneader, knead until the product is a lump material, and then adjust the addition of water Measure until the dry humidity of the product is 20%-30%;

[0031] Step 3: Transfer the prepared lump material to the extruder, select a 5.0mm five-rack module, and extrude it into a five-rack catalyst carrier;

[0032] Step ...

Embodiment 3

[0037] The present invention proposes a method for preparing a low-density protection catalyst suitable for coal tar hydrogenation, comprising the steps of:

[0038] The first step: firstly put pseudo-boehmite together with kale powder and hydroxymethyl cellulose in a kneader, and dry mix for 10 minutes. The mass ratio of pseudo-boehmite, kale powder and hydroxymethyl cellulose is 100:1:1, the specific surface of the pseudo-boehmite used is 200-320m 2 / g, the pore volume is 0.8~1.2ml / g;

[0039] The second step: take deionized water and inorganic acid for solution preparation, and adjust the pH value of the solution to 2~4, then add the prepared solution into the kneader, knead until the product is a lump material, and then adjust the addition of water Measure until the dry humidity of the product is 20%-30%;

[0040] Step 3: Transfer the prepared lump material to the extruder, select a 5.0mm five-rack module, and extrude it into a five-rack catalyst carrier;

[0041] Step ...

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Abstract

The invention discloses a preparation method of a low-density protection catalyst suitable for coal tar hydrogenation, which comprises the following steps: placing pseudo-boehmite together with sesbania powder and hydroxymethyl cellulose in a kneading machine, and carrying out dry mixing for 10 minutes; preparing a solution from deionized water and inorganic acid, adding the prepared solution into the kneading machine, and conducting kneading until the product is a bulk material; transferring the prepared bulk material into a banded extruder, selecting a 5.0 mm five-rack-shaped module, and conducting extruding to form a five-rack-shaped catalyst carrier; transferring the extruded five-rack-shaped catalyst carrier into a cutter to prepare a five-tooth spherical carrier, conducting standing for 6 hours, then transferring the five-tooth spherical carrier into a muffle furnace, conducting drying for 4 hours at 50-100 DEG C, conducting heating to 700-1100 DEG C at the rate of 3 DEG C / min, and conducting roasting for 4 hours at constant temperature to obtain the catalyst carrier; and mixing the prepared impregnation liquid and the obtained catalyst carrier for impregnating for 2 hours, conducting heating to 300-500 DEG C at the rate of 3 DEG C / min, and conducting roasting at the constant temperature for 4 hours. The method can control the density of the finished product to be 0.50-0.70 g / cm<3>.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a preparation method of a low-density protection catalyst suitable for coal tar hydrogenation. Background technique [0002] Protected catalyst is an essential catalyst product for petroleum-based and coal tar-based hydrogenation technology. Usually, the product of protected catalyst needs to have a certain function of removing impurities in raw oil, and at the same time needs to have a high anti-coking ability. This kind of protected catalyst The product has a fatal flaw, the density of the spherical protective catalyst is 1.10~1.20g / cm 3 , The high-density protective catalyst product has a low pore volume, a small specific surface area, and a service life of half a year to a year. If the impurity exceeds the holding capacity of the protective agent, it will penetrate the protective agent into the main catalyst at the rear of the reaction device, pollute and poison the main c...

Claims

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Application Information

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IPC IPC(8): B01J23/883B01J35/10
CPCB01J23/883B01J35/613B01J35/635B01J35/633B01J35/647B01J35/615
Inventor 孙泓韩宝亭
Owner 山东高德鲁田催化剂有限公司