Catalyst for isomerization of paraffins and production method thereof

A catalyst and isomerization technology, which is applied in the field of oil refining industry, can solve the problems of insufficient catalyst strength, etc., and achieve the effects of increasing anti-poison, increasing selectivity, and high thermal stability

Active Publication Date: 2021-08-10
AKTSIONERNOE OBSHCHESTVO SPETSIALNOE KONSTRUKTORSKO TEKHNOLOGICHESKOE BJURO KATALIZATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The catalyst has a wide range of pore sizes (8nm to 24nm), which leads to the formation of reaction by-products
In addition, the strength of the catalyst is insufficient

Method used

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  • Catalyst for isomerization of paraffins and production method thereof
  • Catalyst for isomerization of paraffins and production method thereof
  • Catalyst for isomerization of paraffins and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] Add 0.1 mol of HNO to 200g of aluminum hydroxide powder Catapal A with pseudo-boehmite structure 3 / 1mol Al 2 o 3 of nitric acid. The aluminum hydroxide was stirred vigorously, the temperature was raised to 40°C and maintained at this temperature for up to 2 hours.

[0118] The amount of ready-made sulfated zirconium hydroxide required to obtain the desired catalyst composition was added to the acid-treated aluminum hydroxide, mixed vigorously, and the sulfuric acid was added to the catalyst with the predetermined sulfate ion content.

[0119] The resulting mixture was formed by extrusion, dried in a muffle furnace at a temperature of 120°C to 160°C, and heat-treated at 500°C for 2 hours. A chloroplatinic acid solution was added to the obtained carrier according to the initial humidity. The resulting catalyst charge was dried at a temperature of 100°C to 150°C for 3 hours and heat-treated in an air stream of 450°C for 2 hours; the catalyst composition is shown in Ta...

Embodiment 2

[0122] Similar to Example 1, but the difference is that the use contains 0.3 moles of CH 3 COOH / 1 mole Al 2 o 3 of acetic acid as the acid. When impregnating the support, platinum acetate was applied using cyclic impregnation. The composition of the catalyst is shown in Table 1.

[0123] Similar to Example 1, the catalyst was tested during n-butane isomerization, but with the difference that the hydrogen:hydrocarbon molar ratio = 0.2:1.

Embodiment 3

[0125] Similar to Example 1, but the difference is that the acid used is containing 0.2 mol HCOOH / 1 mol A1 2 o 3 Formic acid, a solution of palladium acetate to sodium acetate in a weight ratio of 2.00:0.10 was used during impregnation.

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Abstract

The catalyst comprises a platinum group metal supported on a carrier consisting of a mixture of aluminum oxide, zirconium oxide and sulfate or tungstate ions. Aluminum hydroxide, which is a precursor of the aluminum oxide, is pretreated with an organic or inorganic acid having an acid modulus of 0.01 to 0.3. The technical result of the present invention is increased activity, selectivity and durability of the produced catalysts for hydrocarbon isomerization.

Description

technical field [0001] The present invention relates to the oil refining industry and is intended for use in the production of catalysts for isomerization processes of paraffins of normal structure. [0002] Catalysts for the isomerization of hydrocarbons using sulfated or tungstated zirconium oxides have found wide application in industrial practice. Background technique [0003] Catalysts based on sulfated zirconium oxides and their production methods, including the use of various organic complexes, are known and provide highly efficient isomerization catalysts while maintaining certain synthesis parameters. [0004] The disadvantage of this method is that the proposed technique is complex and the activity of the catalysts obtained by this method is not high enough. The conversion rate of n-butane isomerization does not exceed 48% under low isomerization intensity (patent RU 2264256, IPC B01J23 / 40, B01J21 / 04, B01J21 / 06, B01J27 / 053, B01J27 / 08, B01J27 / 188, B01J37 / 00, C07C5...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/04B01J37/02C07C5/27B01J21/06B01J23/40B01J27/053B01J23/30B01J35/10B01J21/00B01J23/00
CPCB01J21/00B01J21/04B01J21/06B01J23/00B01J23/30B01J23/40B01J27/053B01J35/10B01J37/02C07C5/27
Inventor 谢尔盖·彼得罗维奇·基尔德亚舍夫加林娜·米哈伊洛芙娜·亚斯特雷博娃亚历山大·尼古拉耶维奇·卡什切约夫
Owner AKTSIONERNOE OBSHCHESTVO SPETSIALNOE KONSTRUKTORSKO TEKHNOLOGICHESKOE BJURO KATALIZATOR
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