A kind of desulfurization desiccant and preparation method thereof

A desiccant and desiccant removal technology, which is applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of zeolite molecular sieve application limitations, complex preparation process, and desiccant failure, and achieve simple and feasible solid-liquid separation steps , The recycling process is simple and the effect of reducing the cost of purification

Active Publication Date: 2021-08-20
DALIAN HAIXIN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The strength of the desiccant will continue to decrease and pulverize, the desiccant will fail, and the resulting dust will be transmitted with the air flow, causing pipeline blockage, causing explosions and other dangers
[0008] The preparation technology and products of the existing desulfurization desiccant still have problems such as complex preparation process, low sulfur capacity, and poor acid resistance, which limit the application of zeolite molecular sieves in the desulfurization drying process

Method used

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  • A kind of desulfurization desiccant and preparation method thereof
  • A kind of desulfurization desiccant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of a desulfurization desiccant: Use 6% NaOH solution to carry out alkali treatment on the formed 4A molecular sieve: keep it at 65°C~95°C for 4 hours, filter and wash it before use; according to the proportion of the metal salt component in the calcium chloride solution 0.5~8%, take 0.03mol / L.LaCl 3 Mix with 1.2mol / L calcium chloride in proportion; take 100g pretreated 4A strip molecular sieve, add to 300g containing 0.03mol / L.LaCl 3 In a mixed solution of 1.2mol / L calcium chloride, stirred and reacted at 85°C for 3h, after solid-liquid separation and washing, dried in an oven at 105°C for 3 hours, and then roasted in a muffle furnace at 500°C for 1h to obtain desulfurization Desiccant, recorded as 1# product.

Embodiment 2

[0029] With 0.03mol / LLaCl in embodiment 1 3 Replaced with 0.045mol / L ZnCl 2 Solution, other steps are with embodiment 1, and gained product is recorded as 2# product.

Embodiment 3

[0031] With 0.03mol / L LaCl in embodiment 1 3 Replaced with 0.02mol / L PdCl 2 Solution, other steps are with embodiment 1, and gained product is recorded as 3# product.

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Abstract

The invention provides a desulfurization desiccant and a preparation method thereof. The main point of the technical scheme is to use the molded 4A molecular sieve to simultaneously complete the metal component modification during the calcium exchange process. The preparation method of the invention is simple and easy, the raw materials are easy to obtain, no additional modification process steps are needed in the production process, the production is efficient and the product quality requirements are guaranteed at the same time. The compressive strength of the desulfurization desiccant produced by this process is nearly 30% higher than that of the raw material. 2 The adsorption capacity of S can be as high as 52mg / g, and the static water absorption can reach 23wt%. 2 S can be recycled and reused.

Description

technical field [0001] The invention belongs to the field of petroleum and natural gas chemical purification treatment, and relates to a desulfurization desiccant and a preparation process. The adsorbent prepared by the process can effectively remove water and hydrogen sulfide in petroleum and natural gas chemical products. Background technique [0002] With the development of the world economy and the increasingly stringent environmental regulations, the demand for producing clean and high-quality petroleum and natural gas chemical products is increasing. It is well known that the presence of water in natural gas transportation and processing can lead to blockage of pipelines, throttle valves and instruments, reducing production capacity and pipeline transportation capacity. The simultaneous presence of hydrogen sulfide and water can cause corrosion of equipment and pipelines. The sulfides in petrochemicals will be converted into SO in the subsequent application process x...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/18B01J20/30C10L3/10B01D53/26B01D53/02
CPCB01D53/02B01D53/261B01D2257/304B01J20/18C10L3/103C10L3/106
Inventor 孙玉坤陈志坚金雷张秋双梁劲
Owner DALIAN HAIXIN CHEM IND
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