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Catalyst for isomerisation of paraffin hydrocarbons and method of preparation thereof

A catalyst and isomerization technology, applied in the field of oil refining industry, can solve problems such as insufficient catalyst strength

Active Publication Date: 2018-02-23
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 isomerisation of paraffin hydrocarbons and method of preparation thereof
  • Catalyst for isomerisation of paraffin hydrocarbons and method of preparation thereof
  • Catalyst for isomerisation of paraffin hydrocarbons and method of preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] 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.

[0124] 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.

[0125] 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

[0128] 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.

[0129] 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

[0131] 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 aluminium oxide, zirconium oxide, and a sulphate ion or tungstate ion. Aluminium hydroxide, the aluminium oxide precursor, is pre-treated using only organic or inorganic acids with an acid module of 0.01-0.3, or in combination with at least one metal compound selected from the group consisting of: yttrium, magnesium, zinc, calcium, barium, cadmium, and strontium, to yield the catalyst wherein the percentage (by volume) of pores with a diameter of 5-8 nm constitutes more than 60% of the total pore volume. The technical result of the invention is the increased activity, selectivity and durability of the produced catalyst for isomerisation of hydrocarbons.

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 Applications(China)
IPC IPC(8): B01J21/04B01J37/02C07C5/27B01J21/06B01J23/40B01J27/053B01J23/30B01J35/10B01J21/00B01J23/00
CPCB01J21/00B01J21/04B01J21/06B01J23/00B01J23/30B01J23/40B01J27/053B01J37/02C07C5/27B01J35/60
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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