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A kind of high-activity heavy aromatics lightening catalyst and preparation method thereof

A technology for lightening and high activity of heavy aromatics, which can be used in catalyst activation/preparation, physical/chemical process catalysts, molecular sieve catalysts, etc. Stability, optimizing matching relationship, reducing the effect of carbon deposition inactivation rate

Active Publication Date: 2022-07-15
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the invention is to solve the poor quality C that exists in the prior art 10 + To solve the problems of poor processing capacity of heavy aromatics and low yield of light aromatics, a high-activity heavy aromatics lightening catalyst and its preparation method are provided. The catalyst prepared by this method can realize clean and efficient utilization of C 10 + Heavy aromatics, with the characteristics of prolific production of light aromatics such as BTX

Method used

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  • A kind of high-activity heavy aromatics lightening catalyst and preparation method thereof
  • A kind of high-activity heavy aromatics lightening catalyst and preparation method thereof
  • A kind of high-activity heavy aromatics lightening catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Platinum (IV)-ammine complex solution

[0033] 1) Weigh 10.0g of platinum sponge, add 50ml of deionized water containing 5wt% hydrochloric acid, heat to boiling on an electric hot plate, keep for 30min in a slightly boiling state, and repeatedly wash three times with deionized water after filtration; add 160ml of aqua regia, Heat it on an electric hot plate in a slightly boiling state until the sponge platinum is completely dissolved, add concentrated hydrochloric acid with a total volume of 50 ml in three times to remove the remaining nitric acid and nitrogen compounds; add deionized water for several times to remove the remaining hydrochloric acid, until the pH test paper does not test for steam. Discoloration, it can be considered that the remaining hydrochloric acid has been driven out, and the solution is concentrated to 100 ml to obtain a chloroplatinic acid solution.

[0034] 2) Transfer the above chloroplatinic acid solution to a round-bottomed flask, ...

Embodiment 3

[0042] 1) Mix 80g Beta molecular sieve (dry basis) with 80g ZSM-5 molecular sieve (dry basis) and 40g pseudo-boehmite (dry basis) and 10g succulent powder, and add a mixture containing 9% acetic acid and 0.4% barium nitrate. 120g of solution, kneaded into mud after mixing, and extruded the product in an extruder as The strip catalyst was dried in air for 12 hours at room temperature, dried in air at 120°C for 8 hours, and calcined at 550°C for 6 hours in an air atmosphere to obtain a composite carrier.

[0043] 2) Add 10.0ml of platinum(IV)-ammine complex solution and 9.97g of solid ammonium citrate into 100ml of deionized water. After the solid is dissolved, place it in a water bath at 85°C for 1.5h at a constant temperature, and adjust the solution to 120ml An impregnation solution was prepared.

[0044] 3) The impregnation solution prepared in 2) was added dropwise to 200 g of the composite carrier at 30°C, immersed in an equal volume for 6 hours, and then placed in an ov...

Embodiment 4

[0046] 1) Mix 80g Beta molecular sieve (dry basis) with 80g ZSM-5 molecular sieve (dry basis) and 40g pseudo-boehmite (dry basis) and 10g succulent powder, and add a mixture containing 9% acetic acid and 0.4% barium nitrate. The solution was 120 g, the preparation conditions were the same as those in Example 1, and the composite carrier was prepared by calcining at 550° C. for 6 hours in an air atmosphere.

[0047] 2) Add 10.0ml of platinum(IV)-ammine complex solution and 9.97g of ammonium citrate solid into 100ml of deionized water. After the solid is dissolved, place it in a water bath at 85°C for 0.5h at a constant temperature, and make up the solution to 120ml An impregnation solution was prepared.

[0048] 3) The impregnation conditions were the same as in Example 1, and the finished catalyst CAT-2 was prepared.

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Abstract

The invention discloses a high-activity heavy aromatic hydrocarbon lightening catalyst and a preparation method thereof. The high-activity heavy aromatics lightening catalyst in the present invention is prepared by loading a precious metal precursor on a composite carrier through drying and roasting; the precious metal precursor is made of at least one of sponge platinum or chloroplatinic acid as a raw material, dissolved in Prepared platinum(IV) complex. The noble metal precursor can realize the directional quantitative impregnation on the composite support, and optimize the bifunctional matching relationship of the catalyst. The catalyst of the invention can efficiently process C under low pressure conditions 10 + The heavy aromatics have higher yields of light aromatics such as BTX, thereby solving the problems of low conversion depth of heavy aromatics, fast deactivation rate of catalyst carbon deposition and low yield of light aromatics in the prior art. Compared with the prior art, the catalyst of the present invention has higher activity and stability for lightening heavy aromatic hydrocarbons, and is especially suitable for processing inferior C. 10 + Heavy aromatics.

Description

technical field [0001] The present invention relates to applications suitable for inferior C 10 + The invention relates to a catalyst for clean and efficient utilization of heavy aromatics, in particular to a catalyst for lightening heavy aromatics and producing more light BTX aromatics and a preparation method thereof. Background technique [0002] Heavy aromatics mainly refer to C by-products of catalytic reforming units. 10 + Heavy aromatics, ethylene cracker by-product C 10 + Heavy aromatics, aromatics disproportionation and isomerization to generate oil, heavy aromatics produced by high-temperature coal coking, etc. At present, heavy aromatics can be separated into high-value mesitylene, mesitylene, naphthalene, etc. by simple rectification. Some of them can be used to produce aromatic hydrocarbon solvent oil or gasoline blending components, etc., and most of them are used as low-cost fuels, and the utilization rate of raw materials is low, making it difficult to c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80B01J37/08B01J37/02C10G67/00C07C4/18C07C15/02
CPCB01J29/80B01J37/0201B01J37/0018C10G67/00C07C4/18B01J29/7415B01J29/44B01J2229/18C07C15/02
Inventor 马明超臧甲忠范景新郭春垒赵训志于海斌靳凤英李健刘航洪鲁伟王春雷李佳
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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