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Modified ZSM-5 molecular sieve, preparation method, and synthetic method for catalytically preparing 3-methyl-3-butene-1-alcohol

A technology of ZSM-5 and molecular sieve, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of increased separation difficulty and energy consumption, low safety factor in the production process, and high energy consumption for separation, so as to achieve production capacity Larger, reduced operation and energy consumption, and high safety factor

Active Publication Date: 2017-04-26
CHINA CATALYST HLDG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The object of the present invention is to provide a kind of method that adopts fixed-bed technology to continuously synthesize 3-methyl-3-butene-1-alcohol, mainly in order to solve the problem of high separation energy consumption caused by using solvent to increase solvent in the existing production technology The use of liquid catalysts increases the difficulty of separation and energy consumption, and the use of batch reactors leads to cumbersome operations, low safety factors in the production process, and low product yields.

Method used

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  • Modified ZSM-5 molecular sieve, preparation method, and synthetic method for catalytically preparing 3-methyl-3-butene-1-alcohol
  • Modified ZSM-5 molecular sieve, preparation method, and synthetic method for catalytically preparing 3-methyl-3-butene-1-alcohol
  • Modified ZSM-5 molecular sieve, preparation method, and synthetic method for catalytically preparing 3-methyl-3-butene-1-alcohol

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Experimental program
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Effect test

Embodiment 1

[0030] Place 80g of ZSM-5 molecular sieve (Tianjin Nanhua Catalyst Co., Ltd., model NKF-5) in a fixed-bed reactor, control the reaction temperature to be 600°C, and feed deionized water with a flow rate of 80g / h with a metering pump for 5 hours Afterwards, the deionized water was stopped, and the system was purged with nitrogen for 2 hours in order to drive away the water in the system, and the temperature was lowered to room temperature to obtain a steam-treated ZSM-5 molecular sieve catalyst, which was designated as PZ-1.

Embodiment 2

[0032] The PZ-1 catalyst that 50g is obtained by embodiment 1 is joined in the lanthanum nitrate solution of 80g0.4wt% and stand for 8 hours, filter, dry, and roast 6 hours under 550 ℃ in muffle furnace, obtain improved The permanent ZSM-5 catalyst is denoted as PZ-2.

Embodiment 3

[0034] The PZ-1 catalyst that 50g is obtained by embodiment 1 was joined in the lanthanum nitrate solution of 80g1.0wt% and stood for 8 hours, filtered, dried, and roasted for 6 hours under 550 ℃ in the muffle furnace, obtained improved The permanent ZSM-5 catalyst is denoted as PZ-3.

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Abstract

The invention discloses a modified ZSM-5 molecular sieve, a preparation method thereof, and a synthetic method for catalytically preparing 3-methyl-3-butene-1-alcohol. The synthetic method for catalytically preparing the 3-methyl-3-butene-1-alcohol comprises the following steps of adopting formaldehyde and isobutylene as starting materials, adopting the modified ZSM-5 molecular sieve as a catalyst, and carrying out Prins condensation reaction in a fixed bed reactor so as to prepare the 3-methyl-3-butene-1-alcohol, wherein the yield can be up to more than 98 percent. The ZSM-5 molecular sieve catalyst is modified by adopting high temperature steam treatment and transition metal. According to the process method provided by the invention, the product yield is high, meanwhile, a solvent is not introduced additionally, and a solid catalyst and a fixed bed continuous process technology are adopted, so that a reaction liquid and the catalyst are separated easily, and the operation and the energy consumption of separation are relieved. Compared with batch reactor type reaction, the process method provided by the invention has the characteristics of safety, simplicity in operation, large production capacity and the like.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and relates to a modified ZSM-5 molecular sieve, a preparation method thereof, and a synthesis method for catalytically preparing 3-methyl-3-butene-1-ol. Background technique [0002] 3-Methyl-3-buten-1-ol is a colorless transparent liquid, an important organic intermediate, which can be used in the production of various fine chemical products and pharmaceuticals such as spices, insecticides and vitamins, and can also be It is used as a raw material for the production of a new generation of polycarboxylic acid series high-efficiency water reducers. In addition, 3-methyl-3-buten-1-ol can produce isopentenol through isomerization reaction, which can be used to synthesize pyrethroids, and can also be used to produce citral. [0003] At present, the industrial synthesis of 3-methyl-3-buten-1-ol is mainly carried out by the Prins method from formaldehyde and isobutene. [0004] Brace, N.O. (J...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40C07C29/38C07C33/025
CPCB01J29/40B01J29/405B01J2229/16B01J2229/186B01J2229/36B01J2229/40C07C29/38C07C33/025
Inventor 李进王庆吉王建青李永宾
Owner CHINA CATALYST HLDG CO LTD
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