Acetylene hydrochlorination ultra-low mercury catalyst as well as preparation method and application thereof

A technology of acetylene hydrochlorination and catalyst, which is applied in the direction of physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, catalytic reaction, etc. Reduce mercury content and other issues, achieve the effect of improving catalytic performance, inhibiting transformation, and improving dispersion

Pending Publication Date: 2021-12-21
贵州重力科技环保股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main reasons for the deactivation of ultra-low mercury catalysts in acetylene hydrochlorination are as follows: ①In industrial applications, the actual operating temperature is 100-200°C, and mercury chloride is a molecular crystal, which is easy to cause the sublimation of mercury chloride, and the mercury chloride content decreases, the catalytic active sites decrease, and the catalytic conversion rate decreases; ② carbon deposition, the reactants of the

Method used

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Examples

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preparation example Construction

[0029] The preparation method of ultra-low mercury catalyst for acetylene hydrochlorination comprises the following steps,

[0030] (a) HgCl 2 , CuCl 2 , ZnCl 2 , KCl and succinimide are added in the hydrochloric acid aqueous solution of pH≤1, mix uniformly, obtain A product;

[0031] (b) Dilute product A by 2-5 times to obtain product B;

[0032] (c) using product B to impregnate carrier activated carbon to obtain product C;

[0033] (d) heating and drying product C, volatilizing hydrochloric acid and water to obtain an ultra-low mercury catalyst for acetylene hydrochlorination.

[0034] More preferably, the temperature-increasing drying is carried out at 50°C, 60°C, 70°C, 80°C, 90°C, and 100°C in a stepwise manner, and the drying time at each temperature range is 1-2 hours.

[0035] The application of ultra-low mercury catalysts for acetylene hydrochlorination, especially the application of succinimide in the preparation of ultra-low mercury catalysts for acetylene hydr...

Embodiment 1

[0037] Example 1. A kind of ultra-low mercury catalyst of acetylene hydrochlorination, described catalyst, by weight, contains HgCl in every one hundred parts 2 4 parts, CuCl 2 10 parts, ZnCl 2 2 parts, 3 parts of KCl, 5 parts of succinimide, and the balance is carrier activated carbon.

[0038] The ultra-low mercury catalyst of acetylene hydrochlorination is prepared according to the following method:

[0039] (a) HgCl 2 , CuCl 2 , ZnCl 2 , KCl and succinimide are added in the hydrochloric acid aqueous solution of pH≤1, mix uniformly, obtain A product;

[0040] (b) Dilute product A by 2-5 times to obtain product B;

[0041] (c) using product B to impregnate carrier activated carbon to obtain product C;

[0042] (d) Carry out stepwise heating and drying of product C at 50°C, 60°C, 70°C, 80°C, 90°C, and 100°C, and the drying time in each temperature range is 1h, and the hydrochloric acid and water are volatilized to obtain acetylene Hydrochlorination ultra-low mercury ...

Embodiment 2

[0055] A kind of acetylene hydrochlorination ultra-low mercury catalyst, described catalyst, by weight, contains HgCl in every one hundred parts 2 3 parts, CuCl 2 6 parts, ZnCl 2 4 parts, 3 parts of KCl, 5 parts of succinimide, and the balance is carrier activated carbon.

[0056] Acetylene hydrochlorination ultra-low mercury catalyst, prepared according to the following method:

[0057] (a) HgCl 2 , CuCl 2 , ZnCl 2 , KCl and succinimide are added in the hydrochloric acid aqueous solution of pH≤1, mix uniformly, obtain A product;

[0058] (b) Dilute product A by 3 times to obtain product B;

[0059] (c) using product B to impregnate carrier activated carbon to obtain product C;

[0060] (d) Carry out stepwise heating and drying of product C under the conditions of 50°C, 60°C, 70°C, 80°C, 90°C, and 100°C, and the drying time of each temperature section is 2 hours, and the hydrochloric acid and water are volatilized to obtain acetylene Hydrochlorination ultra-low mercury...

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PUM

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Abstract

The invention discloses an acetylene hydrochlorination ultra-low mercury catalyst and a preparation method and application thereof. The catalyst is composed of HgCl2, CuCl2, ZnCl2, KCl and succinimide and prepared in the mode of solution dilution dipping and stepped heating drying, and the catalyst has the advantages of being low in mercuric chloride content, high in effective mercuric chloride content, multiple in active point location, high in dispersity, stable in valence state of catalytic active components, high in carbon deposition resistance and long in service life.

Description

technical field [0001] The invention relates to the technical field of the addition reaction of acetylene and hydrogen chloride, in particular to a catalyst for the addition reaction of acetylene and hydrogen chloride. Background technique [0002] Mercury is a heavy metal, commonly known as "mercury", which is a poisonous substance. On January 19, 2013, the United Nations Environment Program adopted the Minamata Convention, an international convention aimed at controlling and reducing mercury emissions on a global scale. damage, the Convention came into effect on August 16, 2017, and China, as the first party to join the Convention, will begin to implement the provisions of the Convention nationwide and undertake the responsibilities and tasks for performance. Regarding the production process of calcium carbide polyvinyl chloride, the Convention proposes many The Ministry of Environmental Protection and the United Nations Industrial Development Organization (UNIDO) officia...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/00C07C17/08C07C21/06
CPCB01J31/182B01J35/0066B01J35/006C07C17/08B01J2231/32B01J2531/26B01J2531/16B01J2531/28C07C21/06
Inventor 李安静张彬安远飞冯琴李武斌何家明
Owner 贵州重力科技环保股份有限公司
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