Composite metal film etherification catalyst with high properties and high activity

Abstract

The invention discloses a composite metal film etherification catalyst with high properties and high activity. A preparation method comprises the following steps: 1) soaking a molecular sieve in phosphotungstic acid for 20 minutes to be acidified and then drying the molecular sieve in the air; 2) adding the aired acidic molecular sieve to graphene sol and drying the molecular sieve at 80-200 DEG C for later use; and 3) respectively preparing magnesium carbonate suspension, a calcium hydroxide dilute solution and a barium hydroxide dilute solution, then soaking the molecular sieve in the step 2) for 5 minutes in sequence, then carrying out gradient heating, carrying out high temperature ignition for 4-8 hours and carrying out natural cooling, thus obtaining the composite metal film etherification catalyst. The composite metal film etherification catalyst has appropriate pore structure distribution and reactive metal dispersity and has the advantages of simple preparation process, high activity, incapability of causing saturation of unsaturated olefin, and the like.

Description

technical field [0001] The invention belongs to the technical field of gasoline processing, and in particular relates to a high-performance and high-activity composite metal film etherification catalyst. Background technique [0002] With the rapid development of human society, countries around the world, especially some developed countries, pay more and more attention to the protection of the environment. The rapid development of the automobile industry has caused serious pollution of the atmosphere by automobile exhaust. In order to reduce this pollution, no The demand for lead-containing oxygen and high-octane gasoline is increasing. At present, one of the main ways to increase the octane number of gasoline is to add oxygen-containing compounds with high octane number, such as methyl Tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE) and methyl tert-amyl ether (TAME) are widely used in countries all over the world because of their high octane number and the advantages...

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Problems solved by technology

[0002] With the rapid development of human society, countries around the world, especially some developed countries, pay more and more attention to the protection of the environment. The more and more rapid development of the automobile industry has caused serious pollution of the atmosphere by automobile exhaust. In order to reduce this pollution, no The demand for lead-containing oxygen and high-octane gasoline is increasing. At present, one of the main ways to increase the octane number of gasoline is to add oxygen-containing compounds with high octane number, such as methyl Tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE) and methyl tert-amyl ether (TAME) are widely used in countries all over the world because of their high octane number and the advantages of not releasing harmful substances such as CO. In addition, due to the impact of the Clean Air Act in the United States in the 1970s, these ethers have been widely used as gasoline octane enhancers and oxygen-containing substances to modify gasoline. The production of MTBE reached its peak in the 1980s. However, the water solubility of MTBE was relatively high. Its solubility in water was 4.8%, which was 2-3 times that of ETBETAEE and TAME. This high water solubility caused pollution to groundwater, so The use of MTBE has been banned in California, USA on December 31, 2002