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Preparation method of catalyst for dehydrogenation of propane

A propane dehydrogenation and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as hidden dangers in energy saving and environmental protection, failure to meet process requirements, environmental pollution and damage, etc., to achieve Reduce energy consumption, high heat transfer efficiency, and reduce costs

Inactive Publication Date: 2017-03-29
江西科帕克环保化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The imported molecular sieve catalyst for propane dehydrogenation is not only expensive, but also has hidden dangers in energy saving and environmental protection.
If it contains highly toxic chromium-based catalysts, deep purification, reduction and recovery must be carried out during the preparation period or post-use treatment, otherwise the pollution and damage to the environment will be very serious. This product basically does not conform to the modern Chinese chemical industry process. Require

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing a catalyst for propane dehydrogenation includes the following specific steps:

[0018] 1) Weigh the following raw materials in the following weight percentages: 40% aluminum hydroxide, 40% pseudo-boehmite, 10% sesame gum, 3% sodium silicate, 7% water;

[0019] 2) Put the weighed raw materials in step 1) into the mixer and knead for 30 minutes, and then grind to 250 meshes for granulation, and then put the granulated pellets into a sealed iron bucket for health treatment for 150h; here, because of the powder The moisture content is 7-7.8%, so it can achieve grinding while preventing dust from flying during granulation. It can also effectively improve the compressive strength of the particles due to the uniform adhesion of the binder to the dry powder raw materials.

[0020] 3) Dry the pellets after the health treatment at a constant temperature of 130°C for 4 hours, then calcinate at 500°C for 3 hours, and then cool to obtain a catalyst carrier;

[0021] 4...

Embodiment 2

[0023] A method for preparing a catalyst for propane dehydrogenation includes the following specific steps:

[0024] 1) Weigh the following raw materials in weight percentages: 42% aluminum hydroxide, 38% pseudo-boehmite, 9.5% sesame gum, 3% sodium silicate, and 7.5% water.

[0025] 2) Put the weighed raw materials in step 1) into the mixer and knead for 50 minutes, then grind to 250 mesh and then granulate, and then put the granulated pellets into a sealed iron bucket for health treatment for 150h; here, because of the powder The moisture content is 7-7.8%, so it can achieve grinding while preventing dust from flying during granulation. It can also effectively improve the compressive strength of the particles due to the uniform adhesion of the binder to the dry powder raw materials.

[0026] 3) Dry the pellets after the health treatment at a constant temperature of 130°C for 4 hours, then calcinate at 500°C for 3 hours, and then cool to obtain a catalyst carrier;

[0027] 4) The prep...

Embodiment 3

[0029] A method for preparing a catalyst for propane dehydrogenation includes the following specific steps:

[0030] 1) Weigh the following raw materials in weight percentages: 42% aluminum hydroxide, 38% pseudo-boehmite, 7.5% sesame gum, 5% sodium silicate, and 7.5% water.

[0031] 2) Put the weighed raw materials in step 1) into the mixer and knead for 50 minutes, then grind to 250 mesh and then granulate, and then put the granulated pellets into a sealed iron bucket for health treatment for 150h; here, because of the powder The moisture content is 7-7.8%, so it can achieve grinding while preventing dust from flying during granulation. It can also effectively improve the compressive strength of the particles due to the uniform adhesion of the binder to the dry powder raw materials.

[0032] 3) Dry the pellets after the health treatment at a constant temperature of 130°C for 4 hours, then calcinate at 500°C for 3 hours, and then cool to obtain a catalyst carrier;

[0033] 4) The prep...

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PUM

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Abstract

The invention discloses a preparation method of a catalyst for dehydrogenation of propane. The method comprises the following concrete steps: (1) raw materials are weighed in percentages by weight: 40-45% of aluminium hydroxide, 35-40% of pseudo-boehmite, 5-10% of sesbania gum, 3-5% of sodium silicate, and 7-7.8% of water. (2) raw materials weighed in the step (1) are added into a mixer for mixing and kneading for 30-50 minutes, the materials are grinded into 250-300 mesh, granulation is carried out, particles which are granulated into balls are placed in a sealed metal bucket for carrying out curing treatment for 150-168 hours; (3) a catalyst carrier is prepared; (4) catalyst slurry is used for dipping in order to prepare the catalyst for dehydrogenation of propane. The catalyst has the advantages of high catalysis efficiency, environmental protection, energy saving, and convenience of reduction and recovery.

Description

Technical field [0001] The invention relates to a catalyst for propane dehydrogenation, in particular to a method for preparing a molecular sieve catalyst used in a reaction effluent device for propane dehydrogenation. Background technique [0002] The output of the propane dehydrogenation project currently accounts for about 10% of the total domestic production capacity of alkanes, but the molecular sieve catalyst technology for propane dehydrogenation has been controlled by foreign companies. [0003] Liquefied petroleum gas is mainly composed of propane, methane, ethane, n-butane and isobutane. The purpose of the catalyst is to dehydrogenate alkanes to olefins, increase the added value of products, and reduce excessive dependence on the cracking process during olefin production At the same time, hydrogen can be recycled to achieve a wide range of utilization values. [0004] The special molecular sieve catalyst for propane dehydrogenation imported from abroad is not only expensiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057
CPCB01J27/0573B01J27/0576
Inventor 易中发黄德金黄运生胡根华易文英欧阳晃亮
Owner 江西科帕克环保化工有限责任公司
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