Regeneration of agent for removing oxygenated compounds in etherified C4 and application
A compound and etherification technology, applied in filter regeneration, organic chemistry, other chemical processes, etc., can solve the problems of reducing catalyst selectivity, affecting the normal production of isomerization equipment, deactivation of isomerization catalysts, etc., to achieve improved Production efficiency and economic benefits, simple preparation method and regeneration method, high adsorption capacity effect
Inactive Publication Date: 2013-06-26
DONGYING COLT NEW MATERIAL CO LTD
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Problems solved by technology
[0002] At present, the components after the etherification reaction of mixed carbon four (C4) and methanol in the refinery are mainly butene-1, butene-2, n-butane, and isobutane. The mixed C4 after the etherification reaction is called ether After C4, it contains about 40% to 50% (mass fraction) of n-butene, which is the raw material of n-butene isomerization to produce isobutene, and oxygen-containing compounds such as dimethyl ether, methanol, methyl tert-butyl ether, etc. It can cause the deactivation of the isomerization catalyst, reduce the selectivity of the catalyst, and affect the normal production of the isomerization unit. Therefore, the content of oxygen-containing compounds in the C4 component after ether must be strictly controlled
Method used
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Embodiment 1
[0018] Embodiment 1 prepares adsorbent A
[0019] 50g of NaY molecular sieve (SiO2 / Al2O3≈5), 50g of alumina, sprayed with water and molded in a rolling ball machine, the particle size is 2-3mm spherical; dried at 80°C and 120°C for 10 hours, and then calcined at 580°C for 6 hours , taken out, cooled to room temperature, and the obtained adsorbent is denoted as adsorbent A. Put in a desiccator for later use.
Embodiment 2
[0020] Embodiment 2 prepares adsorbent B
[0021] Mix 45g NaY molecular sieve (SiO2 / Al2O3≈5), 45g aluminum oxide, and 10g magnesium oxide, add water after mixing, and other operating methods are the same as in Example 1. The resulting adsorbent is denoted as Adsorbent B.
Embodiment 3
[0022] Embodiment 3 prepares adsorbent C
[0023] Mix 45g NaY molecular sieve (SiO2 / Al2O3≈5), 45g aluminum oxide, and 10g zinc oxide, and add water after mixing. Other operating methods are the same as in Example 1. The resulting adsorbent is denoted as Adsorbent C.
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The invention provides regeneration of an agent for removing oxygenated compounds in etherified C4, which is reasonable and practicable in design and low in cost, and application thereof, and. In order to solve the absorbent inactivation problem of subsequent processes when the oxygenated compound-containing etherified C4 fraction is served as a chemical raw material, the invention provides an absorbent. The absorbent consists of 25-40% of a molecular sieve, 45-65% of aluminium oxide and 10-15% of a modified component, wherein the etherified C4 mixture is served as a raw material and is removed with the oxygenated compounds in a fixed bed reactor. The absorbent can be repeatedly used after regeneration. The technology for removing the oxygenated compounds is simple and convenient to operate, and the agent can be used for a long period and has high purity; and moreover, the agent is simple in regeneration method and has a long service life.
Description
Technical field: [0001] The invention relates to the technical field of removing oxygenated compounds from low-molecular olefins, in particular to the regeneration of an agent for removing carbon four oxygenated compounds after etherification and its application. Background technique: [0002] At present, the components after the etherification reaction of mixed carbon four (C4) and methanol in the refinery are mainly butene-1, butene-2, n-butane, and isobutane. The mixed C4 after the etherification reaction is called ether After C4, it contains about 40% to 50% (mass fraction) of n-butene, which is the raw material of n-butene isomerization to produce isobutene, and oxygen-containing compounds such as dimethyl ether, methanol, methyl tert-butyl ether, etc. It can cause the deactivation of the isomerization catalyst, reduce the selectivity of the catalyst, and affect the normal production of the isomerization unit. Therefore, the content of oxygen-containing compounds in the...
Claims
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IPC IPC(8): B01J20/18B01J20/08B01J20/34C07C7/13C07C11/08
Inventor 扈献勇吴全贵万鹏辉周广林
Owner DONGYING COLT NEW MATERIAL CO LTD
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