Catalyst for synthesizing methyl tertiary butyl ether (MTBE) and methyl isoamyl ether, and preparation method

A technology of methyl isoamyl ether and methyl tert-butyl ether, which is applied in the field of catalysts and preparations, can solve the problems of short service life of catalysts, catalysts are easily dissolved by carbon five, etc., and achieve simple regeneration methods and smooth channels , the effect of prolonging the reaction life

Inactive Publication Date: 2014-12-10
天津市南天新材料研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a catalyst and a preparation method for synthesizing methyl tert-butyl ether and methyl isoamyl ether, which can overcome the defects of the prior art, especially the problems of existing catalyst service temperature and catalyst life-span
The obvious feature of the catalyst for producing methyl tert-butyl ether and methyl isoamyl ether from carbon four and carbon five isomeric olefins of the present invention is that the use temperature and pressure are improved, and the catalyst is easily damaged when the temperature is too high. Disadvantage of C5 dissolution, prolonging the reaction life of the catalyst

Method used

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  • Catalyst for synthesizing methyl tertiary butyl ether (MTBE) and methyl isoamyl ether, and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of molecular sieves containing mother liquor: put silica gel, sodium metaaluminate, pseudoboehmite and caustic soda in a reaction kettle, and control the molar ratio to SiO 2 :Al 2 o 3 : Na 2 O: H 2 O =1: (0.002~0.04): (0.03~0.05): (8~15), fully stirred and mixed, the synthesis temperature is 80~160°C, the synthesis pressure is 5~15Mpa, react for 72 hours, cool down, release from the autoclave material, which is the molecular sieve (SiO 2 / Al 2 o 3 The molar ratio is 25~500). This mother liquor also contains a large amount of sodium and small amounts of silicon and aluminum.

[0024] 1) Take the molecular sieve sample containing the mother liquor and analyze the dry basis (the mass percentage of the molecular sieve solid in the unit mass sample) is 35.6%, and take the water glass sample used to configure the adhesive to analyze SiO 2 concentration.

[0025] 2) Weigh 857g of molecular sieve containing mother liquor, and calculate the mass of solid mo...

Embodiment 2

[0035] The catalyst was prepared according to the method of Example 1, wherein the amount of nano-alumina used in step 3) was changed to 21g, and the catalyst was named NDC-2.

Embodiment 3

[0037] The catalyst was prepared according to the method of Example 1, wherein the amount of nano-alumina used in step 3) was changed to 6g, and the catalyst was named NDC-3.

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Abstract

The invention relates to a catalyst for synthesizing methyl tertiary butyl ether (MTBE) and methyl isoamyl ether, and a preparation method. The catalyst comprises a molecular sieve and a bonding agent, wherein the bonding agent takes up 10-20% of the catalyst in mass, the bonding agent is mixed glue solution of nanometer aluminum oxide and water glass, the water glass takes up 60-95% of the bonding agent, and the mole ratio of SiO2 / Al2O3 in the molecular sieve is 25-500, the bonding agent used for forming is silicon-aluminum mixed glue solution containing 60-95% of water glass. The formed catalyst uses the low-concentration hydrochloric acid for removing aluminum. According to the catalyst, under the reaction temperature of 85 DEG C and 0MPa, the conversion rate of isobutene can achieve 55-60%, and the conversion rate of C5 iso-olfin can achieve 35-40%; and under the reaction temperature of 85 DEG C and 8MPa, the conversion rate of isobutene can achieve 90-5-60%, and the conversion rate of C5 iso-olfin can achieve 60-65%. The catalyst can be repeatedly regenerated without secondary pollution.

Description

technical field [0001] The invention relates to a catalyst and a preparation method for synthesizing methyl tert-butyl ether and methyl isoamyl ether, specifically preparing methyl tert-butyl ether and methyl isoamyl from carbon four and carbon five isomeric olefins Catalysts and methods of preparation of ethers. Background technique [0002] Methyl tert-butyl ether (MTBE) has a high net octane number, can be well miscible with gasoline, and has a good blending effect on alkylated gasoline, straight-run gasoline, and catalytically cracked gasoline. As a gasoline additive, it occupies an important position in today's society. It can not only effectively improve gasoline octane number and combustion efficiency, reduce its cost, but also improve vehicle performance, and the exhaust gas does not contain lead, CO emissions are also reduced by 30%, and benzene, butane The emission of other harmful substances such as ethylene and ozone reduces the impact of automobile exhaust on ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/00C07C43/04C07C41/06
CPCY02P20/584
Inventor 张宇刘二明苗晓涛刘述全
Owner 天津市南天新材料研究中心有限公司
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