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Catalyst for dehydrogenation of C16-C19 long chain normal alkanes and preparation method and application thereof

A C16-C19, dehydrogenation catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the dehydrogenation of long-chain alkanes, there is no literature Reporting, low stability, unable to meet the requirements of industrial use, etc.

Active Publication Date: 2010-02-10
PETROCHINA CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But specifically for C 16 -C 19 Catalysts for the dehydrogenation of long-chain alkanes have not been reported in the literature so far in the world
And the catalyzer of above-mentioned invention patent is used for C 16 -C 19 Alkanes dehydrogenation reaction, its stability is very low, can not meet the requirements of industrial use

Method used

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  • Catalyst for dehydrogenation of C16-C19 long chain normal alkanes and preparation method and application thereof
  • Catalyst for dehydrogenation of C16-C19 long chain normal alkanes and preparation method and application thereof
  • Catalyst for dehydrogenation of C16-C19 long chain normal alkanes and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] γ-Al 2 o 3 Preparation of vector

[0027] Mix aluminum hydroxide, pseudo-boehmite and kale powder with a weight ratio of 8:1:1 evenly, add 15% nitric acid, stir and extrude into strips with an extruder, and then dry at 120°C for 4 hours , roasted at 650°C for 8 hours, crushed into 18-20 mesh particles, and finally treated with steam at 650°C for 8 hours. The physical and chemical properties of the obtained carrier are: bulk specific gravity 0.68 g / ml, specific surface area 198 m 2 / g, average particle crushing strength 112 N / cm, pore volume 0.61 cm 3 / g, the average pore diameter is 135nm, of which 0~10nm pores account for 38%, and 100~2000nm pores account for 40%.

Embodiment 2

[0029] Catalyst preparation

[0030] Get the Al prepared in Example 1 2 o 3 50ml of the carrier is placed in an incubator, and at the same time, take 4.4ml of chloroplatinic acid aqueous solution containing 0.02g / ml of platinum, 2.4ml of concentrated hydrochloric acid, 4.5ml of stannous chloride aqueous solution containing 0.06g / ml of tin, and 0.06g / ml of iron 0.9 milliliters of ferric chloride aqueous solution, 2.0 milliliters of potassium chloride aqueous solution containing potassium 0.1 g / ml, add deionized water so that the volume of soaking solution is 42 ml. Add the above impregnating solution into an impregnator equipped with a carrier, impregnate evenly and dry, then roast in a muffle furnace at 500°C for 4 hours, then in the roasting furnace with an air flow rate of 200 ml / min and a water flow rate of 40 g / hour, 500 Treat with 30% steam for 4 hours at ℃, stop the water and continue air cooling, and reduce with pure hydrogen (purity>99.9%) with water content less tha...

Embodiment 3

[0035] long chain n-alkanes C 18 Dehydrogenation to Monoolefins

[0036] On the fixed-bed reactor, the catalyst prepared in Example 2 is evaluated for the long-chain alkane dehydrogenation reaction. 18 Alkanes are raw materials, at a pressure of 0.14 MPa (gauge pressure) and a liquid space velocity of 20 -1 , the ratio of hydrogen to hydrocarbon is 600:1 (volume ratio), and the reaction is carried out under the condition of controlling the initial outlet temperature of the catalyst bed at 455° C., and the conversion rate of normal alkanes is calculated by analyzing the dehydrogenation product components. Orthomorphic C 18 For the alkane conversion rate-time curve, see figure 1 (A).

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Abstract

The invention relates to a catalyst for dehydrogenation of C16-C19 long chain normal alkanes and a preparation method and application thereof. The catalyst comprises the following components in percentage by weight: 0.2 to 0.5 percent of platinum, 0.4 to 2.0 percent of tin, 0.1 to 2.0 percent of iron, 0.4 to 2.0 percent of potassium and the balance of large-pore strip alumina with dual-pore distribution; and the catalyst is used in a reaction for the dehydrogenation of C16-C19 long chain normal alkanes to prepare monoolefine, the conversion rate is 11.4 percent, and the selectivity is 91.9 percent; the catalyst can undergo C16-C19 catalytic dehydrogenation reaction for a long time; and alkylbenzene sulfonate synthesized by dehydrogenized products can have ultra interfacial tension in a wide alkali concentration range for oil-water in actual oil field, and compared with the oil displacement performance of a byproduct of C10-C13 alkylbenzene, namely heavy alkylbenzene sulfonate, the alkali concentration is shifted to the low-concentration direction, and the interface activity of a sample is better.

Description

Technical field: [0001] The present invention relates to a method for C 16 -C 19 A dehydrogenation catalyst for long-chain normal alkanes, a preparation method and application thereof. This catalyst is mainly used for heavy liquid wax (C 16 -C 19 ) dehydrogenation to produce monoolefins and then synthesize heavy alkylbenzene sulfonates and use them in the tertiary oil recovery process of oilfields. Background technique: [0002] Some old oilfields in our country have reached the high water cut period after a long period of exploitation, and the crude oil recovery has shown a downward trend. In order to maintain a stable and high yield, tertiary oil recovery technology must be adopted. The research and application of ASP ASP flooding (alkali, surfactant, polymer) technology has become a leading technology for enhancing oil recovery in my country. The core of ASP ASP flooding technology is surfactant. In recent years, petroleum sulfonate, lignin sulfonate, petroleum carb...

Claims

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Application Information

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IPC IPC(8): B01J23/89C07C5/333C09K8/584
Inventor 孙承林戴锡海何松波王斌杜鸿章白子武杨旭段霞赵玲张力郭奇
Owner PETROCHINA CO LTD
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