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Solid acid alkylation process for isoparaffin and olefins

An isoparaffin and alkylation technology, applied in chemical instruments and methods, organic chemistry, refined hydrocarbon oil, etc., can solve the problem of high energy consumption for separation, reduce operating costs, improve catalytic activity and selectivity, reduce The effect of total energy consumption

Active Publication Date: 2021-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the porous nature of the solid acid alkylation catalyst itself, the alkylation reaction on the active site of the solid acid catalyst requires the raw material to diffuse from the fluid body to the active site, the product to diffuse from the active site to the host, and the adsorption capacity of olefins on the active site Stronger, requiring a higher external alkene ratio to ensure the effect of the alkylation reaction, so that the energy consumption of product separation is higher

Method used

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  • Solid acid alkylation process for isoparaffin and olefins
  • Solid acid alkylation process for isoparaffin and olefins
  • Solid acid alkylation process for isoparaffin and olefins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] Example 1 illustrates the alkylation catalyst employed in the present invention.

[0084] Add water and beat the Y-type molecular sieve numbered Ya to a solid content of 200kg / m 3 Molecular sieve slurry, add the aluminum sol numbered Al1 according to the ratio of Ya and Al1 weight dry basis percentage of 60:40, stir for 4h, make it mix evenly, add 3% weight percentage (by molecular sieve and aluminum Sol 600 ℃ after roasting based on the dry basis weight) of nitric acid and turnip powder, and by adding water to ensure that the water-powder ratio is 0.8, kneading evenly and extruding, the obtained wet strips are dried and roasted to obtain a molded solid acid catalyst sample , named 60A1, the properties are shown in Table 1.

[0085] The solid acid catalyst sample 60A1 of embodiment 1 was added under vacuum containing hydrogenation metal Pt(H 2 PtCl 6 ·6H 2 O is the precursor), impregnating solution with a liquid-solid ratio of 2:1, impregnated under normal pressure ...

Embodiment 2

[0088] Example 2 illustrates the alkylation catalyst employed in the present invention.

[0089] Add water and beat the Y-type molecular sieve numbered Ya to a solid content of 200kg / m 3 Molecular sieve slurry, according to the ratio of Ya and Al2 weight dry basis percentage is 80:20, add the aluminum sol that is numbered Al2, stir 4h, make it mix evenly, add 3% weight percentage (by molecular sieve and aluminum Sol 600 ℃ after roasting based on the dry basis weight) of nitric acid and turnip powder, and by adding water to ensure that the water-powder ratio is 0.8, kneading evenly and extruding, the obtained wet strips are dried and roasted to obtain a molded solid acid catalyst sample , named 80A2, the properties are shown in Table 1.

[0090] The solid acid catalyst sample 80A2 of embodiment 2 was added under vacuum containing hydrogenation metal Pt(H 2 PtCl 6 ·6H 2 O is the precursor), impregnating solution with a liquid-solid ratio of 2:1, impregnated under normal pres...

Embodiment 3

[0093] Example 3 illustrates the alkylation catalyst employed in the present invention.

[0094] Add water and beat the Y-type molecular sieve numbered Ya to a solid content of 200kg / m 3 Molecular sieve slurry, according to the ratio of Ya and Al3 weight dry basis percentage is 95:5, add the aluminum sol that is numbered Al3, stir 4h, make it mix evenly, add 3% weight percentage (by molecular sieve and aluminum Sol 600 ℃ after roasting based on the dry basis weight) of nitric acid and turnip powder, and by adding water to ensure that the water-powder ratio is 0.8, kneading evenly and extruding, the obtained wet strips are dried and roasted to obtain a molded solid acid catalyst sample , named 95A3, the properties are shown in Table 1.

[0095] The solid acid catalyst sample 95A3 of embodiment 3 was added under vacuum containing hydrogenation metal Pt(H 2 PtCl 6 ·6H 2 O is the precursor), impregnating solution with a liquid-solid ratio of 2:1, impregnated under normal press...

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Abstract

The invention discloses a solid acid alkylation process for isoparaffin and olefins. Thesolid acid alkylation process comprises the steps of raw material pretreatment, alkylation reaction, catalyst regeneration and alkylation reaction product separation, in the raw material pretreatment, dialkene is removed from isoparaffin and olefin raw materials through a pre-hydrogenation process, free water is removed through a drying dehydration process, sulfides are removed through a desulfurization process, and oxygen-containing compounds are removed through a deoxidation process in sequence; the macroporous specific volume of a catalyst is 0.30-0.40 ml / g, the ratio of the macroporous specific volume to the specific length of the catalyst particles is 1.0-2.5 ml / g.mm, and the ratio of the specific surface area to the particle length is 3.40-4.50 m<2> / mm; and the alkylation reaction product separation is carried out in a fractionating tower using a heat pump technology. According to the method, high-octane-number alkylated gasoline can be obtained, and the process energy consumption is low.

Description

technical field [0001] The invention relates to a solid acid alkylation method for isoparaffins and olefins, and belongs to the field of petrochemical industry. Background technique [0002] Isoparaffins mainly isobutane with C 3 ~C 6 Alkylation of olefins under the action of acidic catalyst is an important process for producing clean, high-octane gasoline components. The alkylated gasoline obtained by this process has low vapor pressure, low sensitivity, good anti-knock performance, no aromatics, olefins, and low sulfur content, and is an ideal blending component for high-octane gasoline. [0003] Alkylation is an acid catalyzed reaction. At present, the industrially applied alkylation production processes include sulfuric acid method and hydrofluoric acid method, which use sulfuric acid or hydrofluoric acid as a catalyst to synthesize alkylate oil from isoparaffins and olefins. Due to the corrosiveness and toxicity of sulfuric acid and hydrofluoric acid and the harm to...

Claims

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Application Information

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IPC IPC(8): C10G29/20C10G67/14C07C7/04C07C9/10B01J29/12B01J35/10B01J35/02
CPCC10G29/205C10G67/14C07C7/04B01J29/126C10G2300/1081C10G2300/1088C10G2400/02B01J35/617B01J35/40B01J35/635B01J35/633C07C9/10Y02P20/584
Inventor 李永祥胡合新张成喜赵志海罗一斌张久顺侯栓弟
Owner CHINA PETROLEUM & CHEM CORP
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