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A process for preparing a catalyst, the catalyst, and a process for the production of an olefin oxide, a 1,2-diol, a 1,2-diol ether, or an alkanolamine

A catalyst, alkylene oxide technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as affecting the selectivity of alkylene oxide

Active Publication Date: 2009-04-08
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this negatively affects the selectivity of conversion to the desired alkylene oxide
In addition, the equipment used can only withstand temperatures up to a certain point, so that the reaction must be terminated when the reaction temperature will reach a level that is not suitable for the reactor

Method used

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  • A process for preparing a catalyst, the catalyst, and a process for the production of an olefin oxide, a 1,2-diol, a 1,2-diol ether, or an alkanolamine

Examples

Experimental program
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preparation example Construction

[0073] The preparation of silver catalysts is known in the art and known methods can be used to prepare catalysts useful in the practice of this invention. The method of depositing silver on the support includes impregnating the support or support body with a cationic silver-containing silver compound, and reducing to form metallic silver particles. Reference may be made to eg US-A-5380697, US-A-5739075, EP-A-266015 and US-B-6368998, which US patents are hereby incorporated by reference.

[0074] The reduction of cationic silver to metallic silver can be accomplished during the step in which the catalyst is dried such that the reduction itself does not require a separate processing step. This may be the case if the silver-containing impregnation solution contains reducing agents such as oxalate, lactate or formaldehyde.

[0075] Significant catalyst activity is obtained by using a catalyst silver content of at least 10 g / kg relative to the catalyst weight. Preferably, the ca...

Embodiment 1

[0110] Embodiment 1-carrier preparation:

[0111] Carrier A and Carrier B were prepared using thermally sinterable material alpha alumina powder. The alpha alumina powder had the properties shown in Table 1 below.

[0112] Table 1

[0113] volume average particle size

3.0-3.4 microns

average crystallite size

1.8-2.2 microns

[0114] The mixture contained the ceramic components shown in Table 2 below. The amounts are in parts by weight (pbw).

[0115] Table 2

[0116] Alpha alumina

98.8(pbw)

Zirconia

1.0(pbw)

Magnesium silicate

0.2(pbw)

[0117] The following components were added in parts by weight as shown in Table 3:

[0118] table 3

[0119] Ceramic components (see Table 2)

100(pbw)

crushed walnut shells

27(pbw)

Polypropylene

1.5(pbw)

boric acid

0.1(pbw)

vaseline

5(pbw)

[0120] Vehicle A was prepared from the mixture described abov...

Embodiment 2

[0126] The preparation of embodiment 2-catalyst:

[0127] Prepare the silver-amine-oxalate stock solution by the following steps:

[0128] Dissolve 415 g of reagent grade sodium hydroxide in 2340 ml of deionized water and adjust the temperature to 50°C.

[0129] 1699 g of high purity "Spectropure" silver nitrate was dissolved in 2100 ml of deionized water and the temperature adjusted to 50°C.

[0130] The sodium hydroxide solution was slowly added to the silver nitrate solution with stirring while maintaining a solution temperature of 50°C. The mixture was stirred for 15 minutes, then the temperature was lowered to 40°C.

[0131] Water was removed from the precipitate produced during the mixing step, and the conductivity of the water containing sodium and nitrate ions was measured. An amount of fresh deionized water equal to the amount removed was added back to the silver solution. The solution was stirred at 40°C for 15 minutes. This process is repeated until the condu...

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Abstract

A process for preparing a catalyst comprising depositing a metal on a carrier prepared by: - treating one or more thermally decomposable materials in particulate form comprising potassium under conditions sufficient to reduce the total quantity of potassium in the thermally decomposable material, - preparing a mixture comprising the treated thermally decomposable material and a heat sinterable material, and - heating the mixture to sinter the heat sinterable material and to thermally decompose the treated thermally decomposable material to form the carrier; the catalyst; a process for preparing an olefin oxide by reacting an olefin with oxygen in the presence of the catalyst; and a method of using an olefin oxide for making a 1,2- alkanediol, a 1,2-alkanediol ether or an alkanolamine.

Description

technical field [0001] The present invention relates to a method for preparing an epoxidation catalyst, a catalyst and a method for preparing alkylene oxide, 1,2-diol, 1,2-diol ether or alkanolamine. Background technique [0002] In olefin epoxidation, a feed containing an olefin and a source of oxygen is contacted with a catalyst under epoxidation conditions. Alkenes react with oxygen to form alkylene oxides. A product mixture is obtained comprising alkylene oxide and generally unreacted feed and combustion products. [0003] Alkylene oxides can react with water to form 1,2-diols, with alcohols to form 1,2-diol ethers, or with amines to form alkanolamines. Thus, 1,2-diols, 1,2-diol ethers and alkanolamines can be prepared in a multi-step process initially comprising epoxidation of olefins and subsequent conversion of the alkylene oxides formed with water, alcohols or amines. [0004] Olefin epoxidation catalysts comprise a silver component, usually with one or more addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/04B01J23/68B01J37/08
CPCB01J23/688B01J37/06B01J21/04B01J23/687B01J37/082C07C29/106B01J37/0018C07D301/08B01J37/084B01J37/0009Y02P20/52C07C31/202B01J21/00B01J37/08B01J23/68
Inventor D·J·雷慕斯M·A·理查德T·西姆曼斯基
Owner SHELL INT RES MAATSCHAPPIJ BV
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