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A kind of alkane dehydrogenation heating aid, its preparation method and application

A heating aid and alkane dehydrogenation technology, which is applied in propane dehydrogenation and petrochemical fields, can solve the problems of poor hydrothermal performance and difficult reduction, and achieve high calorific value, cost saving and good hydrothermal stability Effect

Active Publication Date: 2022-05-06
润和科华催化剂上海有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problem that existing exothermic additives for alkane dehydrogenation are not easy to restore after hydrothermal aging, resulting in poor hydrothermal performance, the present invention provides an exothermic additive for alkane dehydrogenation

Method used

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  • A kind of alkane dehydrogenation heating aid, its preparation method and application
  • A kind of alkane dehydrogenation heating aid, its preparation method and application
  • A kind of alkane dehydrogenation heating aid, its preparation method and application

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preparation example Construction

[0029] A preparation method of an alkane dehydrogenation heating aid, comprising the following steps:

[0030] S1: Calcium oxide or calcium hydroxide or a mixture of both, CuO or copper hydroxide or copper carbonate or basic copper carbonate or a mixture of at least two, Al 2 o 3 Or aluminum hydroxide or a mixture of the two, add water to knead evenly to obtain a kneaded product;

[0031] S2: Drying and calcining the kneaded product in sequence;

[0032] Preferably, the kneaded product can be extruded into strips or pelletized before drying, preferably extruded into strips; then dried and calcined in sequence, the drying temperature is 80-110°C, preferably 100°C, and the calcining temperature is 900°C -1200°C, preferably 1100°C, the calcination time is 3-4 hours, preferably 4 hours.

[0033] The exothermic additive for alkane dehydrogenation can be used as an exothermic additive in the dehydrogenation process of low-carbon alkanes.

Embodiment 1

[0055] Pseudoboehmite (containing 0.07 kg of alumina), calcium hydroxide (containing 0.68 kg of calcium oxide), and 0.25 kg of copper oxide were placed in a kneader and mixed evenly, and kneaded by adding water. After the kneading is completed, it is placed in an extruder to extrude, and the extruded sample is dried at 100° C. for 4 hours. The dried sample was then baked at 1100°C for 3 hours. The sample was named REZEL-1. The heat release before and after hydrothermal treatment is shown in Table 1.

[0056] REZEL-1 was aged at 800°C and 100% hydrothermal for 48 hours, and the sample was named Steam REZEL-1.

[0057] For the XRD pattern of Steam REZEL-1, see figure 2 , Steam REZEL-1 is black, see the DSC curve of REZEL-1 before and after hydrothermal aging Figure 4 .

Embodiment 2

[0059] Pseudo-boehmite (containing 0.16 kg of alumina), 0.53 kg of calcium oxide, and 0.25 kg of copper oxide are placed in a kneader and mixed evenly, and kneaded by adding water. After the kneading is completed, it is placed in an extruder to extrude, and the extruded sample is dried at 110° C. for 4 hours. The dried sample was then baked at 900°C for 4 hours. The sample was named REZEL-2. The heat release before and after hydrothermal treatment is shown in Table 1.

[0060] REZEL-2 was aged at 800°C and 100% hydrothermal for 48 hours, and the sample was named Steam REZEL-2.

[0061] See the XRD pattern of Steam REZEL-2 figure 2 , Steam REZEL-2 is black, see the DSC curve of REZEL-2 before and after hydrothermal aging Figure 4 .

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Abstract

The invention discloses an alkane dehydrogenation exothermic additive, its preparation method and application, mainly composed of CaO, CuO and Al 2 o 3 Prepared, CaO, CuO and Al 2 o 3 The parts by weight are: 35-90 parts, 10-40 parts and 5-40 parts; the Cu element in the alkane dehydrogenation heating aid is mainly CaCu 2 o 3 and Ca 2 CuO 3 The form exists, and the ratio of the number of Ca atoms to the number of Al atoms is ≥ 6 / 7; the alkane dehydrogenation heating aid does not contain an alumina phase; alumina and calcium oxide are converted into high-calcium aluminate calcium aluminate (Ca / Al atomic number ratio Greater than or equal to 6 / 7), it can avoid the reaction of CuO and alumina to produce aluminum-copper spinel, and use high-calcium calcium aluminate as the skeleton to avoid the adhesion phenomenon that occurs when the carrier is sintered under conditions.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, in particular to the field of propane dehydrogenation, in particular to an alkane dehydrogenation heating aid, its preparation method and its application. Background technique [0002] Low-carbon olefins are basic organic raw materials with large demand and wide applications in the petrochemical industry. For example, propylene is an important basic chemical raw material and is widely used in the production of polypropylene, isopropanol, cumene, carbonyl alcohol, and propylene oxide , acrylic acid, acrylonitrile and other chemical products; and another important low-carbon olefin butene has also been widely used, such as the production of high-octane gasoline components by mixing butene, as well as maleic anhydride and secondary Butanol, heptene, polybutene, acetic anhydride and other products. [0003] At present, my country's demand for low-carbon olefin resources is still increasing, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/18C07C5/327C07C11/06C07C11/02
CPCC09K5/18C07C5/327C07C11/06C07C11/02
Inventor 施宗波卓润生刘新生张青李邵红钟嘉兴胡泽松
Owner 润和科华催化剂上海有限公司
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