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Catalyst used for heterogeneously producing isoalkene by utilizing direct-chain olefin skeleton and preparation method thereof

A technology for straight-chain olefins and catalysts is applied in the field of highly selective n-butene skeletal isomerization catalysts for isobutene production and catalyst preparation, which can solve the problems of multiple side reactions, low initial isoolefin selectivity and yield, etc., and achieve high Effects of isobutene selectivity, suppression of side reactions, and high application prospects

Active Publication Date: 2013-04-17
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

In the above-mentioned patents, hydrogen-type FER zeolites are used as catalysts. On these catalysts, the selectivity and yield of initial isoolefins are usually low, accompanied by more side reactions

Method used

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Embodiment Construction

[0018] In order to further illustrate the invention, the following illustrative embodiments are provided.

[0019] Preparation of Sodium Potassium Hydrogen FER Zeolite and Hydrogen FER Zeolite

[0020] The HSZ-720KOA type NaK-FER zeolite used in the following examples is provided by East Soda (Shanghai) Trading Co., Ltd., wherein by weight percentage, Na 2 O content is 0.9%, K 2 The O content is 6.32%. Na in each example 2 O and K 2 The O content was determined by X-ray fluorescence spectrometry. The chemical reagents used were of analytical grade unless otherwise specified.

[0021] 20 g of NaK-FER zeolite and 400 g of deionized water were mixed with a certain mass of NH 4 Cl is mixed evenly and beating, the NH used 4 The quality of Cl is shown in Table 1. The resulting slurry was stirred at room temperature (25°C) for 2 hours, then filtered, and the filter cake was thoroughly washed with deionized water 30 times the dry weight of the zeolite, dried at 110°C and roast...

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Abstract

The invention provides a catalyst used for heterogeneously producing isoalkene by utilizing a direct-chain olefin skeleton. The catalyst comprises an FER zeolite and a binder, wherein the FER zeolite is a sodium potassium hydrogen type FER zeolite, and based on the percentage by weight of zeolite, Na2O content is 0.02-0.1%, K2O content is 1.0-5.0%, and mole ratio of SiO2 to Al2O3 is 8-50. The catalyst provided by the invention is obtained by fully mixing the FER zeolite powder, the binder, sesbania powder, inorganic acid and water, moulding the obtained mixture and then drying and roasting. The ferrierite adopted by the invention is of a sodium potassium hydrogen type, and the catalyst prepared by the method provided by the invention has isoalkene selectivity compared with the hydrogen type FER zeolite containing no sodium or / and potassium.

Description

technical field [0001] The invention relates to a catalyst for producing iso-olefins through skeletal isomerization of linear olefins and a preparation method thereof. Specifically, the invention relates to a highly selective catalyst for producing isobutene through skeletal isomerization of n-butene and a preparation method for the catalyst. Background technique [0002] As the market demand for high-octane gasoline continues to grow, so too does the need for low aliphatic alkyl ethers blended as octane boosters. These alkyl ethers are mainly methyl tert-butyl ether (MTBE), ethyl tert-butyl ether and methyl tert-amyl ether. For example, China's total demand for isoalkyl ether additives in 2010 exceeded 3 million tons. The high market demand for isoalkyl ethers is bound to drive the demand for raw material isoolefins, and isoolefins produced by traditional catalytic cracking and ethylene cracking routes are difficult to meet market demand. [0003] In order to obtain more ...

Claims

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Application Information

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IPC IPC(8): B01J29/65C07C11/09C07C5/27
Inventor 周峰陈明张淑梅张宝国翟庆铜苏杰
Owner CHINA PETROLEUM & CHEM CORP
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