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Catalyst for alkylation of toluene and methanol and preparation method thereof

A catalyst and alkylation technology, which is applied in the direction of carbon compound catalysts, physical/chemical process catalysts, catalysts, etc., can solve the problems of cumbersome catalyst preparation technology, improved catalytic activity of toluene and methanol alkylation, and achieve high selectivity, The effect of high conversion rate of toluene

Active Publication Date: 2018-11-13
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN103785463A and patent CN103785464A reported a catalyst for the alkylation reaction of toluene and methanol with ZSM-5 and EU-1 molecular sieves as active components. The catalyst preparation technology is relatively cumbersome, and the catalytic activity of the alkylation of toluene and methanol needs to be further improved

Method used

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  • Catalyst for alkylation of toluene and methanol and preparation method thereof
  • Catalyst for alkylation of toluene and methanol and preparation method thereof
  • Catalyst for alkylation of toluene and methanol and preparation method thereof

Examples

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preparation example Construction

[0020] The preparation method of catalyst of the present invention comprises the steps:

[0021] (i) mixing the EU-1 molecular sieve with a binder to form a carrier, the EU-1 molecular sieve in the carrier is hydrogen type,

[0022] (ii) impregnating the carrier prepared in step (i) with a solution of a boron-containing compound and a magnesium-containing compound, drying and calcining the impregnated carrier.

[0023] The EU-1 molecular sieve preparation method described in the above (i) step comprises the steps:

[0024] (1) Mix silicon source, aluminum source, inorganic base, templating agent, surfactant and water to make reactants, so that the molar ratio of each material is:

[0025] 0.1~0.7R: 0.001~0.3M: 0.02~0.1Na 2 O: 0.003~0.05Al 2 o 3 : SiO 2 : 10~100H 2 o

[0026] Wherein, R is the template agent for preparing EU-molecular sieves, M is a surfactant, and the amount of the silicon source is represented by SiO 2 In terms of, the amount of aluminum source is Al ...

example 1

[0048] (1) Preparation of large pore volume EU-1 molecular sieve

[0049] 40g (SiO 2 Content 29 mass %) silica sol is added in 41.19g water, after stirring, add 1.31g sodium aluminate (Al 2 o 3 Content 45% by mass, Na 2 O content 33% by mass), 0.22g of sodium hydroxide, 21.64g of hexammonium trimethyldibromide (97% by mass of purity), 3.56g of hexadecyltrimethylammonium bromide (99% by mass of purity), Stir and mix to obtain reactant evenly, wherein each material mol ratio is as follows:

[0050] 0.3R: 0.05M: 0.05Na 2 O: 0.03Al 2 o 3 : SiO 2 : 20H 2 o

[0051] In the formula, R is hexammonium trimethyldibromide, and M is hexadecyltrimethylammonium bromide.

[0052] Put the above reactants into the reaction kettle, carry out the first-stage hydrothermal crystallization at 110°C under airtight conditions for 18 hours, then raise the temperature to 180°C for the second-stage hydrothermal crystallization for 54 hours, cool to 25°C, collect the solids and wash them thorou...

example 2

[0058] Catalyst is prepared by the method for example 1, difference is (2) in step, get the carrier 11g of hydrogen-containing type EU-1 molecular sieve, impregnate 24 hours with the solution containing 0.93g boric acid and 6.51g magnesium acetate at 25 ℃, 120 ℃ Drying for 6 hours and calcining at 500° C. for 6 hours prepared Catalyst B, wherein the boron content was 1.5% by mass and the magnesium content was 10% by mass calculated based on the carrier.

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Abstract

Disclosed is a catalyst for alkylation of toluene and methanol. The catalyst includes a carrier and the following active components calculated on the basis of the carrier, by mass: 0.5-10.0% of B, and4-18% of Mg. The carrier includes, by mass, 5-90% of an EU-1 molecular sieve and 10-95% of a binder, wherein the pore volume of the EU-1 molecular sieve is 0.30-0.70 ml / g and the specific surface area is 360-500 m2 / g. The catalyst is used for alkylation reactions of toluene and methanol. The catalyst is high in toluene conversion rate and has high p-xylene selectivity.

Description

technical field [0001] The invention relates to an alkylation reaction catalyst and a preparation method, in particular to a toluene-methanol alkylation catalyst and a preparation method. Background technique [0002] Zeolite molecular sieve is a functional material with unique structure and properties, and has been widely used in petrochemical, fine chemical, environmental protection and other fields. The EUO type molecular sieve has a one-dimensional pore network structure with a pore diameter of 0.41×0.57 nanometers. These one-dimensional channels also have side pockets with a depth of 0.81 nanometers and a diameter of 0.68×0.58 nanometers. French Petroleum Company has published many patents, such as US4537754, CN1327946, CN99126910.1 all report the synthesis progress of EU-1 molecular sieve and its application in the field of aromatic hydrocarbons. The pore volumes of EU-1 molecular sieves synthesized in the above reports are all less than 0.3ml / g. [0003] Alkylation ...

Claims

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Application Information

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IPC IPC(8): B01J29/70B01J35/10C07C2/00C07C15/06
CPCC07C2/00B01J29/7023C07C2529/70B01J35/394B01J35/635B01J35/615C07C15/06Y02P20/52
Inventor 高俊魁钟进
Owner CHINA PETROLEUM & CHEM CORP
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