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Alkylation raw material selective hydrogenation catalyst and preparation method thereof

A technology for selective hydrogenation and catalyst, applied in the direction of carbon compound catalyst, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc. Unfavorable industrial application implementation and other problems, to achieve the effect of high 1-butene isomerization activity and good catalytic activity

Pending Publication Date: 2020-04-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pillared modified sepiolite has a complicated process and a long preparation period, which is not conducive to the implementation of industrial applications.

Method used

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  • Alkylation raw material selective hydrogenation catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Take 100g of clean white sepiolite to crush, soak, remove the scum, filter and dry; add 5.5g of metatitanic acid to the dried sepiolite, crush to less than 160 mesh, roast at 435℃ for 7h to obtain modified sepiolite A ; The mass percentage composition of white sepiolite is: SiO 2 67%, MgO31%, FexOy2 O 3 , CaO;

[0032] 2) Modified sepiolite A was extruded into strips with 3g of auxiliary sesame powder, dried, and roasted at 435°C for 8 hours to obtain catalyst carrier B;

[0033] 3) PdCl 2 Add dilute HCl to make PdCl 2 Solution, the pH of the solution is 2, immersed in the same volume as the carrier B for 13 minutes, then drained, and roasted at 400°C for 8 hours to obtain the finished hydrogenation catalyst H-1;

[0034] The hydrogenation catalyst H-1 consists of 0.25% Pd, 2.5% titanium dioxide, and the rest is sepiolite components and additives. The pore volume of the catalyst is 0.35mL / g ~0.40 mL / g, the pore diameter is 90% is 12nm~20nm, and the specific surface area is...

Embodiment 2

[0036] 1) Take 100g of clean white sepiolite to crush, soak, remove the scum, filter and dry; add 4.5% metatitanic acid to the dried sepiolite, pulverize to less than 160 mesh, roast at 420℃ for 7.8h to obtain modified sepiolite A; The mass percentage composition of white sepiolite is: SiO 2 68%, MgO30%%, FexOy2 O 3 , CaO;

[0037] 2) Modified sepiolite A is mixed with 5g of sesame powder and 5g of lignocellulose and extruded into strips, dried, and calcined at 450°C for 8 hours to obtain catalyst carrier B;

[0038] 3) PdCl 2 Add dilute HCl to make PdCl 2 Solution, the pH value of the solution is 2.1, and the carrier B is immersed in the same volume for 15 minutes, then drained, and calcined at 420°C for 8 hours to obtain the finished hydrogenation catalyst H-2;

[0039] The composition of hydrogenation catalyst H-1 includes 0.28% Pd, 2.0% titanium dioxide, and the rest is sepiolite components and additives. The pore volume of the catalyst is 0.35mL / g ~0.40 mL / g, the pore diameter ...

Embodiment 3

[0041] 1) Take 100g of clean white sepiolite to crush, soak, remove the scum, filter and dry; add 5% metatitanic acid to the dried sepiolite, pulverize to less than 160 mesh, roast at 450℃ for 6.3h to obtain modified sepiolite A; The mass percentage composition of white sepiolite is: SiO 2 66%, MgO2%, FexOy2 O 3 , CaO;

[0042] 2) Modified sepiolite A was extruded into strips with 5g of auxiliary sesame powder, dried, and calcined at 460°C for 8 hours to obtain catalyst carrier B;

[0043] 3) PdCl 2 Add dilute HCl to make PdCl 2 The solution, the pH value of the solution is 2.3, the same volume as the carrier B is immersed for 15 minutes, then drained, and roasted at 400°C for 8 hours to obtain the finished hydrogenation catalyst H-3;

[0044] The hydrogenation catalyst H-1 consists of 0.23% Pd, 2.3% titanium dioxide, and the rest is sepiolite components and additives. The pore volume of the catalyst is 0.35mL / g ~0.40 mL / g, the pore diameter is 90% is 12nm~20nm, and the specific sur...

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Abstract

The invention discloses an alkylation raw material selective hydrogenation catalyst and a preparation method thereof and belongs to the technical field of hydrogenation catalysts. The catalyst is characterized by comprising the following components in percentage by weight: 0.2%-0.3% of Pd, 1.0%-5.0% of titanium dioxide and the balance of sepiolite and auxiliary agents. The preparation method comprises the following steps: preparing sepiolite, crushing, soaking, removing scum, filtering, drying; adding meta-titanic acid powder accounting for 4-6% of the mass of the sepiolite into the dried sepiolite, crushing the sepiolite and the meta-titanic acid powder together until the particle size is smaller than 160 meshes, performing roasting modification for 6-8 hours at the roasting temperature of 400-500 DEG C to obtain modified sepiolite; adding the modified sepiolite, extruding into strips, airing, roasting to obtain a catalyst carrier; preparing a PdCl2 solution, carrying out isopyknic impregnation on the PdCl2 solution and the carrier obtained in the step (3), carrying out draining, and carrying out roasting so as to obtain the finished catalyst. The selective hydrogenation catalysthas catalytic activity equivalent to that of a noble metal catalyst, is low in cost, and also has very high 1-butene isomerization activity.

Description

Technical field [0001] A selective hydrogenation catalyst for alkylation raw materials and a preparation method thereof belong to the technical field of hydrogenation catalysts. Background technique [0002] Alkylation is an important process for the production of high-octane gasoline in the modern refining industry. Under the action of sulfuric acid or hydrofluoric acid catalyst, the alkylated oil produced by the reaction of isobutane and hydrocarbon is a mixture of isoparaffins with high octane number, low sensitivity, and ideal volatility and clean combustion It is an ideal blending component for high-quality high-octane gasoline. [0003] Alkylation raw materials are mixed carbon four from steam cracking and catalytic cracking processes, and the butadiene content is generally 0.2% to 2.0% (v / v). In the alkylation reaction of butadiene, ASO can be formed as a heavy-weight composite. ASO is a viscous heavy oil with a high molecular weight, which can increase the dry point of a...

Claims

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Application Information

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IPC IPC(8): B01J23/44B01J23/89B01J35/02B01J35/10C07C5/05C07C5/13C07C11/08
CPCB01J23/8946B01J23/58C07C5/05C07C5/13C07C2523/44C07C2523/89B01J35/40B01J35/615B01J35/633B01J35/647C07C11/08Y02P20/52
Inventor 姜建波薛红霞齐焕东王昊白志敏赵庆鲁
Owner CHINA PETROLEUM & CHEM CORP
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