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Zeolite molecular sieve catalysis method for synthesizing sec-butyl acetate from acetic acid and butylenes.

A technology of sec-butyl acetate and zeolite molecular sieve, applied in the direction of molecular sieve catalyst, chemical instrument and method, preparation of organic compounds, etc.

Active Publication Date: 2009-09-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

β molecular sieve as a catalyst for the continuous esterification of acetic acid and butene in a fixed-bed reactor has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix 100g of Hβ molecular sieve, 100g of boehmite, 4g of Tianqing powder, and 3g of citric acid evenly, add an appropriate amount of 10% dilute nitric acid as an extrusion aid, stir, and extrude into strips. Dry at 120°C and bake at 540°C for 5 hours. The above catalyst is cut into 1-3 mm to prepare a columnar catalyst, and the prepared catalyst is marked as A. The β molecular sieve content is 85%.

Embodiment 2

[0019] Mix 100g of Hβ molecular sieve, 30g of boehmite, 3g of Tianqing powder, and 12.11g of boric acid evenly, add an appropriate amount of 10% dilute nitric acid as an extrusion aid, stir, and extrude to shape. Dry at 120°C and bake at 540°C for 6 hours. The above catalyst is cut into 1-3 mm to prepare a columnar catalyst, and the prepared catalyst is marked as B. The β molecular sieve content is 85%.

Embodiment 3

[0021] Mix 100g Hβ molecular sieve, 24.43g boehmite (water content 35%), 3g Tianqing powder, 10.61g boric acid, add 100g of 5% H 2 SO 4 As extrusion aid, stirring and extruding. Dry at 120°C and bake at 540°C for 6 hours. The above catalyst is cut into 1-3 mm to prepare a columnar catalyst, and the prepared catalyst is marked as C. Beta molecular sieve content is 80%.

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PUM

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Abstract

A method for synthesizing sec-butyl acetate catalyzed by zeolite molecular sieve catalysis uses acetic acid and butylenes as material, modified beta-zeolite molecular sieve as catalyst, fixed bed reactor for continuously synthesizing sec-butyl acetate under reaction temperature 90-130DEG C, pressure 1.5-2.5 MPa, weight space velocity 0.5-3.0h<-1>; the beta molecular sieve, adhesive, modifier, sesbaniarostrata powder, additive, adjuvant squeezer are mixed uniformly, squeezed to strip shape, dried, baked under no less than 540 DEG C; the adhesive is silica, boehmite, kaolin; modifier is lanthanum nitrate, additive is nitric acid or boric acid; assistant squeezer is silica sol, dilute sulfuric acid and dilute nitric acid; the squeezed strip catalyst is cut to 1-3mm , contains 50-85% molecular sieve by weight and metal La 0-0.05% by weight. The catalyst of the invention can reduce equipment corrosion of traditional process and production cost.

Description

technical field [0001] The invention belongs to the technical field of industrial catalysis, and relates to a method for synthesizing sec-butyl acetate with an esterification reaction solid acid catalyst, in particular to a method for preparing sec-butyl acetate with acetic acid and butene on a zeolite molecular sieve catalyst. Background technique [0002] Zeolite molecular sieve is a solid acid with continuous acid strength distribution, and has extremely wide applications in petrochemical, fine chemical and other fields. Sec-butyl acetate is an environmentally friendly industrial solvent for paints and coatings. The traditional production process of sec-butyl acetate is to obtain acetic acid and sec-butanol as raw materials and sulfuric acid as a catalyst for esterification. This process has disadvantages such as serious equipment corrosion and serious pollution. In recent years, the production process using butene and acetic acid as raw material and solid acid as catal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/14C07C67/04B01J29/70
Inventor 王坤院刘中民谢文勇
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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