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Catalyst for preparing epoxypropane by HPPO method and preparation method thereof

A propylene oxide and catalyst technology, applied in the field of catalysts, can solve the problems of low propylene oxide selectivity, high proportion of solvent methanol, high energy consumption for separation, etc., and achieve high reaction efficiency, good PO selectivity, and high strength

Active Publication Date: 2021-06-08
湖南东搏科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method uses a high proportion of solvent methanol, which causes the disadvantages of high energy consumption and low selectivity of propylene oxide in the later stage of separation.

Method used

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  • Catalyst for preparing epoxypropane by HPPO method and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this Example 1, a spherical HPPO method was prepared by a catalyst for preparing primary oxide.

[0036] A catalyst prepared by HPPO is prepared by mass percentage, including 80% modified TS-1 molecular sieve, 20% Silicalite-1 molecular sieve.

[0037] In the present embodiment, the quality percentage of titanium elements in the modified TS-1 molecular sieve is 1.8%.

[0038] A method of preparing a catalyst prepared by the above HPPO method, including the following steps:

[0039] 1) TS-1 molecular sieve preparation: Referring to patented US 4,410,501 synthesis of particle size sizes in 200 ~ 500 nm titanium silicon molecular sieve liquid, centrifuged to obtain filter cake, washed, dried, and calcined to obtain TS-1 molecular sieve (primary powder); The mother liquor produced during the preparation process was recovered and concentrated to form a TS-1 molecular sieve concentrate.

[0040]2) TS-1 molecular sieve modification: 1800 kg of water in the modified kettle, then...

Embodiment 2

[0046] In this Example 2, a catalyst prepared by a h-shaped HPPO method was prepared.

[0047] A catalyst for preparing primary ogenloxane in an HPPO method, comprising 75% modified TS-1 molecular sieve, 25% Silicalite-1 molecular sieve.

[0048] In the present in this Example 2, the quality percentage of titanium elements in the modified TS-1 molecular sieve was 2%.

[0049] A method of preparing a catalyst prepared by the above HPPO method, including the following steps:

[0050] 1) TS-1 molecular sieve preparation: Referring to patented US 4,410,501 synthesis of particle size sizes in 200 ~ 500 nm titanium silicon molecular sieve liquid, centrifuged to obtain filter cake, washed, dried, and calcined to obtain TS-1 molecular sieve (primary powder); The mother liquor produced during the preparation process was recovered and concentrated to form a TS-1 molecular sieve concentrate.

[0051] 2) TS-1 molecular sieve modification: 1800 kg of water in the modified kettle, then add 200k...

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PUM

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Abstract

The invention relates to a catalyst for preparing epoxypropane by an HPPO method and a preparation method thereof, and the catalyst comprises the following components in percentage by mass: 50-99% of modified TS-1 molecular sieve and 1-50% of Silicalite-1 molecular sieve, the preparation method comprises the following steps: 1) preparing the TS-1 molecular sieve; 2) modifying the TS-1 molecular sieve; 3) balling or extrusion molding; and 4) preparing a catalyst finished product. According to the catalyst disclosed by the invention, the modified TS-1 molecular sieve is used as an active component, an estersil hydrolysis (using tetrapropylammonium hydroxide) concentrated solution and a TS-1 molecular sieve mother liquor concentrated solution are used for replacing water and a binder for molding, and then the bonded part is continuously crystallized into the Silicalite-1 molecular sieve under the condition of high-temperature water vapor; the modified TS-1 molecular sieve is used as an active component, and the Silicalite-1 molecular sieve is used as a bonding support. The catalyst has the advantages of good PO selectivity, high H2O2 utilization rate, high reaction efficiency, high strength, long service life and the like; and in addition, the TS-1 molecular sieve mother concentrate is recycled, and the production process is more environment-friendly.

Description

Technical field [0001] The present invention relates to catalysts and processes prepared by hydrogen peroxide directly propylene oxide, and more particularly to a catalyst prepared by a spherical or strip-shaped total crystalline molecular sieve type HPPO method and a preparation method thereof. Background technique [0002] The propylene oxide (PO) is an important chemical raw material that has more than 10 million tons / year, which has been exceeded by the second large propylene derivative of the polypropylene. House oxide is mainly used to produce polyether polyol (PPG, which accounts for about 78% of domestic PO total consumption), propylene glycol (PG, accounting for about 8%), propylene glycol ether (about 7%), propylene carbonate Esters, isopropanolamines, and acrolene, etc., are the main raw materials such as nonionic surfactants, ruptures, emulsifiers, and the like. [0003] The hydroxane industrial production process route has four major categories: 1. Phaloxidin metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C07D301/12C07D303/04
CPCB01J29/80C07D301/12C07D303/04Y02P20/52
Inventor 焦永东
Owner 湖南东搏科技有限公司