Production method and production device for low-mercury catalyst

A low-mercury catalyst and production method technology, applied in chemical instruments and methods, physical/chemical process catalysts, catalyst activation/preparation, etc., can solve problems such as shortage of mercury supply, achieve low environmental pollution, low price, and reduce mercury pollution effect of things

Active Publication Date: 2014-09-24
贵州省万山银河化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In particular, mercury catalysts not only have a shortage of mercury supply, but also the environmental pollution caused by the discharge of mercury-containing wastes cannot be ignored.

Method used

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  • Production method and production device for low-mercury catalyst

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for producing a low-mercury catalyst, comprising the steps of:

[0031] (1) Take raw materials: coal-based columnar activated carbon, mercuric chloride and barium chloride, wherein the weight percentage of mercuric chloride is 5%, the weight percentage of barium chloride is 1.5%, and the balance is coal quality Columnar activated carbon;

[0032] The diameter of coal-based columnar activated carbon is 3-6mm, the mechanical strength is >95%, the moisture content is 45%. The purity of mercury chloride is greater than 99%, and the purity of barium chloride is greater than 98%.

[0033] Put the weighed mercuric chloride and barium chloride into the solution preparation tank, add soft water to the solution preparation tank, the weight of the soft water is 50 times the total weight of mercuric chloride and barium chloride, stir for 15 minutes, and obtain the impregnation solution ;

[0034] (2) Pickling pretreatment of coal-based columnar activated carbon: Add coal...

Embodiment 2

[0042] A method for producing a low-mercury catalyst, comprising the steps of:

[0043] (1) Take raw materials: coal-based columnar activated carbon, mercuric chloride and barium chloride, wherein the weight percentage of mercuric chloride is 6.5%, the weight percentage of barium chloride is 1.2%, and the balance is coal quality Columnar activated carbon;

[0044] The diameter of coal-based columnar activated carbon is 3-6mm, the mechanical strength is >95%, the moisture content is 45%. The purity of mercury chloride is greater than 99%, and the purity of barium chloride is greater than 98%.

[0045] Put the weighed mercuric chloride and barium chloride into the solution preparation tank, add soft water to the solution preparation tank, the weight of the soft water is 100 times the total weight of mercuric chloride and barium chloride, stir for 20 minutes, and obtain the impregnation solution ;

[0046] (2) Pickling pretreatment of coal-based columnar activated carbon: Add c...

Embodiment 3

[0054] A method for producing a low-mercury catalyst, comprising the steps of:

[0055] (1) Take raw materials: coal-based columnar activated carbon, mercuric chloride and barium chloride, wherein the weight percentage of mercuric chloride is 5.5%, the weight percentage of barium chloride is 1.0%, and the balance is coal quality Columnar activated carbon;

[0056] The diameter of coal-based columnar activated carbon is 3-6mm, the mechanical strength is >95%, the moisture content is 45%. The purity of mercury chloride is greater than 99%, and the purity of barium chloride is greater than 98%.

[0057] Put the weighed mercuric chloride and barium chloride into the solution preparation tank, add soft water to the solution preparation tank, the weight of the soft water is 200 times the total weight of mercuric chloride and barium chloride, stir for 15 minutes, and obtain the impregnation solution ;

[0058] (2) Pickling pretreatment of coal-based columnar activated carbon: Add c...

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Abstract

Relating to the technical field of vinyl chloride synthesis, the invention particularly discloses a production method of a low-mercury catalyst for vinyl chloride synthesis, and also discloses a device for the low-mercury catalyst production. The production method of the low-mercury catalyst involved in the invention adopts coal columnar activated carbon, mercuric chloride and a chlorine salt stabilizing agent as raw materials, wherein the mercuric chloride accounts for 5.0-6.5% by weight, the chlorine salt stabilizing agent accounts for 1-1.5% by weight, and the rest is the coal columnar activated carbon. By means of acid pickling pretreatment, impregnation treatment, drying treatment and packaging, the low-mercury catalyst can be obtained. The low-mercury catalyst prepared by the method has the advantages of good catalytic effect, good stability, low price, small environmental pollution, a mercuric chloride loss rate of 1.8-2.4% after 3hours of baking under 250DEG C, and a service life up to over 8200 hours, which is close to that of high-mercury catalysts on the market and is significantly higher than that of existing low-mercury catalysts.

Description

technical field [0001] The invention relates to the technical field of synthesizing vinyl chloride, in particular to a method for producing a low-mercury catalyst for synthesizing vinyl chloride and a production device thereof. Background technique [0002] PVC resin is one of the five major synthetic resins in the world. It is widely used in industry, with huge demand and broad development prospects. At present, my country's PVC resin production methods can be divided into ethylene method, acetylene method, imported vinyl chloride monomer and dichloroethane method according to raw materials. Among them, the proportion of acetylene production process is increasing. The development of acetylene-based PVC has driven the development of related industries, but it is also facing challenges such as insufficient supply of raw materials. In particular, mercury catalysts not only have the shortage of mercury supply, but also the environmental pollution caused by the discharge of me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138B01J37/02B01J37/08
Inventor 李锐曹云超廖军民聂坚宾
Owner 贵州省万山银河化工有限责任公司
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