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Light alkane isomerization method

A low-carbon alkane, isomerization technology, applied in the treatment of hydrocarbon oil, refined hydrocarbon oil, petroleum industry, etc., can solve the problems of easy loss, high isomerization activity, cannot be directly replenished, etc., to increase octane number, The effect of improving the isomerization rate and improving the activity

Inactive Publication Date: 2017-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The solid superacid catalyst has a certain acidity and high isomerization activity, so it can carry out the isomerization reaction at a lower temperature and obtain a higher isomerization rate, but the supported SO in the reaction process of this type of catalyst 4 2- Easily lost and cannot be directly replenished

Method used

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specific Embodiment approach

[0038] According to a specific embodiment of the preparation of the catalyst of the present invention, the preparation method of the chlorine-containing aluminum oxycatalyst may include: (1), the alumina carrier is first impregnated with a solution containing a Group VIII metal compound and then dried to obtain impregnated alumina; (2), impregnating the impregnated alumina obtained in step (1) with an alkane solution containing alkylaluminum chloride for a second impregnation to obtain the chlorine-containing aluminum oxide catalyst; preferably, the chlorine-containing The preparation method of the alumina-type catalyst may also include: performing the second impregnation in the step (2) after the impregnated alumina obtained in the step (1) is subjected to water chlorine treatment; wherein, the conditions of the water chlorine treatment may be The atmosphere that water chlorine handles is oxygen or air, and the temperature that water chlorine handles is 450-700 ℃, and the mol ...

Embodiment 1

[0049] Preparation of Chloride-Containing Aluminum Oxygen Catalyst

[0050] (1), preparation of alumina carrier

[0051]Mix 100 grams of SB aluminum hydroxide powder (produced by Condea in Germany, with an alumina content of 75% by mass) and an appropriate amount of deionized water to make the liquid / solid weight ratio 1:1.6, stir, add water and 68% by mass of concentrated The volume ratio of nitric acid is 7mL of dilute nitric acid of 1:1, extrusion molding, drying at 120°C for 2 hours, and calcining at 550°C for 4 hours to obtain alumina carrier.

[0052] (2), the introduction of platinum components

[0053] The alumina carrier prepared in the previous step is impregnated with a mixture of chloroplatinic acid, hydrochloric acid and trichloroacetic acid prepared in a predetermined amount as an impregnating solution, and the platinum content in the impregnating solution is 0.3% by mass. The amounts are 1.2% and 5.0% respectively (all relative to the mass of the alumina carri...

Embodiment 2

[0057] Prepare the catalyst according to the method of Example 1, except that the impregnating solution prepared in step (2) does not contain hydrochloric acid and trichloroacetic acid, and the composition of the prepared catalyst B is shown in Table 1.

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Abstract

The invention discloses a light alkane isomerization method. The method comprises the following steps: successively carrying out dehydration treatment and rectification treatment on a light alkane raw material, letting the treatment product contact with a chlorine-containing alumina catalyst, and carrying out hydroisomerization to obtain an isomerization product, wherein the chlorine-containing alumina catalyst is obtained after chlorine is introduced into an alkane solution containing alkyl aluminum chloride. isomerization activity of the chlorine-containing alumina catalyst can be effectively enhanced, yield of isoalkane is raised, and octane number of the isomerization product is increased.

Description

technical field [0001] The invention relates to a method for isomerizing low-carbon alkanes, in particular to a method for isomerizing low-carbon alkanes in the presence of a catalyst using aluminum oxide containing chloride as a carrier. Background technique [0002] Alkane isomerization is one of the important processes for the development of clean fuels. The catalysts used are mainly divided into three types: molecular sieve catalysts, solid superacid catalysts and chlorine-containing alumina catalysts, all of which can support noble metal components. The isomerization process using molecular sieve catalysts has a simple process and has relatively wide requirements for the impurity content of raw oil. It has been widely used in industry at present, but this type of catalyst has low activity. The solid superacid catalyst has a certain acidity and high isomerization activity, so it can carry out the isomerization reaction at a lower temperature and obtain a higher isomeriza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G45/60C10G45/62
CPCC10G45/60C10G45/62C10G2300/1081C10G2300/305
Inventor 张秋平李振兴马爱增王京红
Owner CHINA PETROLEUM & CHEM CORP
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