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Reviving agent solution of mtp deactivated catalyst and method and application of reviving

A deactivated catalyst and reactivator technology, applied in the field of coal chemical industry, can solve the problems of low conversion rate of methanol to propylene, high energy consumption of MTP process, short MTP operation cycle, etc., to prolong online operation time and increase operation cycle , The effect of improving the selectivity of propylene

Active Publication Date: 2019-01-15
SHANDONG QILU KELI CHEMICAL RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the catalysts regenerated by these methods still have many problems and deficiencies, mainly the MTP operating cycle is short, frequent regeneration is required, methanol conversion and propylene selectivity are not high, etc.
For example, the MTP operation cycle is short, the general operation cycle is about 600h, and the total service life is about 8000h
In addition, the MTP process has high energy consumption due to the repeated regeneration of the catalyst

Method used

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  • Reviving agent solution of mtp deactivated catalyst and method and application of reviving
  • Reviving agent solution of mtp deactivated catalyst and method and application of reviving
  • Reviving agent solution of mtp deactivated catalyst and method and application of reviving

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1 (resurrection 1 time)

[0049] The deactivated MTP catalyst in the above Comparative Example 1 was not regenerated by normal charcoal burning, but was revived with an aqueous solution containing a rejuvenating agent.

[0050] In the comparative example experiment, the feeding of the aqueous methanol solution was stopped, and the reactivation agent solution and 100% methanol were fed simultaneously. Gradually adjust the feed preheating temperature of the second-stage MTP reactor, and control the MTP catalyst bed temperature to 470±5°C. The resurrection agent solution contains 0.03wt% ammonium nitrate, 0.09wt% ammonium formate, 0.18wt% ammonium bicarbonate, contains 0.5wt% hydrogen peroxide, and has a mass space velocity of 0.1h -1 ;Methanol mass space velocity 0.9h -1 , Reaction 50h. Then return to the normal feeding of methanol aqueous solution, and at the same time adjust the temperature of the first-stage MTD reactor to 330°C, and the temperature of the s...

Embodiment 2

[0054] Example 2 (resurrection 2 times)

[0055] In Example 1, the self-made KLM-01 catalyst was regenerated by conventional regeneration method for the first air charcoal regeneration, and then continued the second cycle reaction.

[0056]The temperature of the first-stage MTD reactor is 340°C, and the temperature of the second-stage MTP reactor is 480±5°C. According to the conversion rate of methanol, adjust the space velocity of methanol sequentially according to the above method until the space velocity is 1.0h -1 The methanol conversion rate dropped to 93.52%. A total of 634 hours of operation, methanol processing capacity of 1185g / g·cat, average P / E mass ratio of 7.99, propylene selectivity of 40.43%.

[0057] Stop the normal feeding, change to reactivating agent solution and 100% methanol at the same time feeding, and carry out the first reactivation treatment; at the same time, gradually adjust the feed preheating temperature of the second-stage reactor, and control ...

Embodiment 3

[0061] Example 3 (resurrection 2 times)

[0062] In Example 2, the self-made KLM-01 catalyst was regenerated by conventional regeneration methods for the second air charcoal regeneration, and then the third cycle of reaction was continued.

[0063] The temperature of the first-stage MTD reactor is 350°C, and the temperature of the second-stage MTP reactor is 480±5°C. According to the conversion rate of methanol, adjust the space velocity of methanol sequentially according to the above method until the space velocity is 1.0h -1 The methanol conversion rate dropped to 93.54%. A total of 721 hours of operation, methanol processing capacity of 984g / g·cat, average P / E mass ratio of 8.13, propylene selectivity of 41.16%.

[0064] Stop the normal feeding, change to reactivating agent solution and 100% methanol at the same time feeding, and carry out the first reactivation treatment; at the same time, gradually adjust the feed preheating temperature of the second-stage reactor, and ...

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Abstract

The invention discloses a revivifier solution for preparing an MTP (methanol to propylene) deactivated catalyst. The solution contains a revivifier and water, wherein the revivifier is selected from any one or several ingredients of ammonium salts and urea. The revivifier solution further contains hydrogen peroxide. In addition, the invention also discloses a method for revivifying the MTP deactivated catalyst and purposes. When the revivifier solution provided by the invention is used for online treatment, the methanol conversion rate can be recovered to 99 percent or higher under the conditions of no work halt and no agent discharging; the selectivity of the propylene is improved by 1 to 5 percent; in addition, the online operation time of the catalyst is greatly prolonged. The method can be combined with a conventional air regeneration method, the energy saving and consumption reduction can be realized; the production efficiency can be improved; the service life of the catalyst can be effectively prolonged.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and relates to a reactivator solution of methanol-to-propylene (MTP) inactivated catalyst and a method and application thereof, in particular to a reactivator solution and an on-line Resurrection methods and uses. technical background: [0002] Propylene is an important petrochemical basic raw material next to ethylene, mainly derived from catalytic cracking of petroleum, steam cracking of naphtha and dehydrogenation of propane (butane). In recent years, driven by the downstream industry of propylene, the global demand for propylene has grown rapidly, and the imbalance between supply and demand of propylene has intensified year by year. In order to produce or increase the production of propylene, people have developed a variety of process routes using non-petroleum resources as raw materials. For example, the technology to produce propylene from methanol has been industrialized. Due to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/08B01J38/18B01J38/00B01J29/90
Inventor 高步良李明罡张正才罗一斌徐兴忠舒兴田
Owner SHANDONG QILU KELI CHEMICAL RESEARCH INSTITUTE CO LTD