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Method of starting up a reaction system

一种反应系统、反应器的技术，应用在化学仪器和方法、液态烃混合物的制备、加氢处理操作的开车等方向，能够解决无催化活性、分子筛没有工业价值、小催化活性等问题

Inactive Publication Date: 2006-09-20
EXXONMOBIL CHEM PAT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, exposure of activated molecular sieves to water vapor can result in molecular sieves with little to no catalytic activity; this means that the molecular sieves become essentially of no commercial value

Method used

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  • Method of starting up a reaction system
  • Method of starting up a reaction system
  • Method of starting up a reaction system

Examples

Experimental program
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Effect test

preparation example Construction

[0119] If no binder is used in the preparation of the molecular sieve catalyst, the catalyst is considered to be a binderless catalyst. If a binder is used, the amount of binder used to prepare the molecular sieve catalyst is from about 2 to about 30 weight percent, based on the total weight of binder, molecular sieve, and optionally included matrix material (excluding liquid, i.e. after drying). Preferably, the amount of binder used to prepare the molecular sieve catalyst is from about 5 to about 20 wt%, more preferably from about 7 to about 15 wt%, based on the total weight of binder, molecular sieve, and optionally included matrix material (excluding liquid, ie after drying).

[0120] If the catalyst composition contains binder and matrix material, the weight ratio of binder to matrix material is generally 1:15 to 1:5, for example 1:10 to 1:4, especially 1:6 to 1:5. The amount of binder is generally about 2 to about 30 wt%, such as about 5 to about 20 wt%, especially abou...

Embodiment 1

[0183] One example of starting up a system containing a molecular sieve catalyst that is susceptible to deactivation by contact with water molecules is illustrated with respect to FIG. 1 , which is a flow diagram of a reaction system comprising a reactor 102 and a regenerator 104 . The flow diagram of Figure 1 relates specifically to a system for converting oxygenates to olefins, although it is specifically relevant to any system incorporating a reactor and regenerator. According to the embodiment shown in Figure 1, the regenerator 104 is heated by injecting hot air. Air is input to the regenerator 104 by sending air from the compressor 106 , through conduit 108 , to the heater and burner 110 , and into the regenerator 104 via conduit 112 . The regenerator 104 is heated at 400°F (204°C) for 8 hours, at which point the refractory material in the regenerator 104 will be substantially dry.

[0184] While heating regenerator 104 , reactor 102 is also heated by injecting superheat...

Embodiment 2

[0189] according to figure 2 Another example illustrating the start-up of a reaction system containing a molecular sieve catalyst that is easily deactivated by contact with water molecules is a flow chart of the reaction system shown in FIG. 1 . according to figure 2, the heating process is the same as in Example 1, except that relatively dry gas is used to heat the reactor 202 instead of steam. according to figure 2 , part of the air delivered by the air compressor 206 is delivered to the drying heater 230 via the conduit 228 to heat the air to an appropriate temperature as described in Embodiment 1. As a result of increasing the temperature of the air, the air is at low relative hydraulic pressure and is considered substantially dry. The dry air is delivered to reactor 202 via conduits 232 and 234, and the start-up procedure of Example 1 is continued.

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Abstract

The invention is directed to methods of starting up reaction systems. The reaction systems are those that use catalysts that comprise molecular sieves, particularly metalloaluminophosphate molecular sieves, especially metalloaluminophosphate molecular sieves which are susceptible to loss of catalytic activity due to contact with water molecules. The methods provide appropriate mechanisms of heating and loading the activated molecular sieves to protect against loss of catalytic activity that can occur due to contact with water molecules.

Description

technical field [0001] The present invention relates to a method of priming a reaction system. In particular, the present invention relates to a process or method for starting a reaction system while maintaining or protecting the catalytic activity of molecular sieves that are prone to loss of catalytic activity due to contact with water molecules. Background technique [0002] Molecular sieves are generally obtained from aluminum silicate materials and contain a pore system which is a network of uniform pores and cavities. These pores and cavities trap molecules of a size equal to or smaller than those of the pores and cavities, and repel molecules of larger size. [0003] The pores and cavities of molecular sieves are formed as a result of the addition of template materials in the molecular sieve manufacturing process. During the formation of the molecular sieve itself, a lattice-type chemical structure is formed from the aluminosilicate-type materials. This lattice-typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G49/24C10G3/00C07C1/20C07C2/02C07C2/64C07C5/22C10G11/00C10G35/04C10G47/02C10G50/00
CPCY10S585/951C10G2300/1037C10G50/00C10G2400/02C10G3/62C10G2300/4006C10G2400/10C10G49/24C10G2400/22C10G11/00C10G2400/30C10G2400/20C10G2300/4031C10G3/49Y02P30/20
Inventor J·H·小比奇R·E·沃尔特S·C·冯R·N·洛佐斯M·J·G·詹森K·R·克莱姆L·M·马藤斯S·N·沃恩
Owner EXXONMOBIL CHEM PAT INC
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