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A kind of titanium silicon molecular sieve catalyst and preparation method thereof

A titanium-silicon molecular sieve and catalyst technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of high catalyst production cost, and achieve the effect of improving catalytic performance and reducing raw material costs.

Active Publication Date: 2021-12-24
NANJING HONGBAOLI POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN1151739A discloses a method for preparing 1,2-butylene oxide by catalytic hydrogenation of vinyl propylene oxide, the catalyst used is a noble metal hydrogenation catalyst, and the catalyst production cost is relatively high

Method used

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  • A kind of titanium silicon molecular sieve catalyst and preparation method thereof
  • A kind of titanium silicon molecular sieve catalyst and preparation method thereof
  • A kind of titanium silicon molecular sieve catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 520g of deionized water, 40g of cetyltrimethylammonium bromide, 120g of ethanol and 8g of ethylenediamine into the reaction kettle, stir at 55°C for 0.5h, add 80g of tetraethyl orthosilicate, and continue stirring After 20 hours, it was suction filtered, dried, and calcined at 450° C. to remove the template agent to obtain 20 g of silica raw powder.

[0032] Gained 20g silicon dioxide former powder and 40g 10% nitric acid aqueous solution, 40g 45% silicon dioxide aqueous solution, 0.6g hydroxypropyl methylcellulose are evenly mixed, extruded by single-screw extruder, dried, roasted, Shaped silicon strips are obtained.

[0033] Add 40g of formed silicon strips into the reaction furnace, heat up to 200°C, add 20g of titanium tetrachloride and keep it warm for 12h, cool down to 80°C, then add deionized water, wash with water until the pH value is 7.5, and then dry at 100°C for 15h. Ti-silicon bars are obtained.

[0034] Add 40g of titanium-silicon strips into the sol...

Embodiment 2

[0039] In this embodiment, 550 g of water, 25 g of cetylamine, 12.5 g of tetramethylammonium hydroxide, 225 g of isopropanol, 175 g of silica gel solution, and the rest are the same as in Example 1. The resulting catalyst is labeled 2*. Usage is marked as Q2*.

Embodiment 3

[0041]20g of silicon dioxide raw powder prepared in Example 1 was uniformly mixed with 80g of 10% citric acid aqueous solution, 80g of 20% silicon dioxide aqueous solution, and 2g of hydroxypropyl methylcellulose, and extruded by a single-screw extruder , drying, and roasting to obtain shaped silicon strips. All the other are identical with embodiment 1. The resulting catalyst is labeled 3*. Usage is marked Q3*.

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Abstract

The invention discloses a titanium silicon molecular sieve catalyst and a preparation method thereof. The titanium-silicon molecular sieve catalyst contains the following components in terms of mass percentage: 89.3-93.4% of silicon dioxide, 2.3-7.6% of titanium dioxide, 1.4-1.9% of copper oxide, and 0.9-2.5% of iron oxide; the titanium dioxide comes from Titanium source; the copper oxide is from a copper source; the iron oxide is from an iron source. The invention adopts the combination template agent to synthesize silicon-containing carrier and load titanium, then impregnate cheap transition metal to prepare titanium-silicon molecular sieve catalyst, which reduces the cost of catalyst preparation; the catalyst is applied to the epoxidation of butene and ethylbenzene hydrogen peroxide to prepare ring Oxybutane improves the conversion rate of raw materials and the selectivity of products.

Description

technical field [0001] The invention belongs to the technical field of catalyst synthesis, and in particular relates to a titanium-silicon molecular sieve catalyst and a preparation method thereof. Background technique [0002] Butylene oxide is an important organic compound raw material, and the polyether prepared from it has multiple superior functions such as defoaming, demulsification, dispersion and emulsification. The production process of butylene oxide mainly includes the chlorohydrin method, the peracetic acid method and the recovery and purification of the by-products of PO production. The product cost of producing butylene oxide by chlorohydrin method is relatively low, but it will produce a large amount of waste water and waste residue, causing environmental pollution. The peracetic acid method has high operational requirements and technical difficulties and is limited. However, ethylbenzene peroxide is used as an oxidant to epoxidize butene to obtain butylene ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/89C07D303/04C07D301/12
CPCC07D301/12C07D303/04B01J29/89
Inventor 单书锋余渡江黄东平邢益辉魏斌
Owner NANJING HONGBAOLI POLYURETHANE