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Purification method for hydrogen sulfide and hydrogen phosphide in acetylene production by calcium carbide method

A technology of hydrogen sulfide and calcium carbide method, which is applied in the field of purification, can solve the problems of no waste liquid treatment and discharge, and achieve the effects of reducing maintenance costs, simple and easy treatment, and improving work efficiency

Pending Publication Date: 2021-03-12
NANJING SPECIAL GAS FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Purpose of the invention: In order to solve the problems existing in the prior art, the present invention provides a purification method for hydrogen sulfide and phosphine in the production of acetylene by the calcium carbide method; With the problem of emission, the treatment of water in acetylene gas is simple and easy, and it also has a better and more stable purification effect. It is also suitable for use in processes with high phosphine and phosphine content.

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  • Purification method for hydrogen sulfide and hydrogen phosphide in acetylene production by calcium carbide method
  • Purification method for hydrogen sulfide and hydrogen phosphide in acetylene production by calcium carbide method

Examples

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Embodiment 1

[0025] A method for purifying hydrogen sulfide and phosphine in the production of acetylene by a calcium carbide method, comprising the following steps:

[0026] (1) Crude acetylene gas is first processed through the oxidant purification tower, which is equipped with filler one, and the preparation method of filler one is as follows: the packing density of the filler is 0.65g / cm 3 Get mass concentration and be 35% ferric chloride solution 100mL, be that the sodium hydroxide solution of 1% is regulated pH value to be 4~6 with mass concentration, pour into the diatomaceous earth adsorption that granular particle diameter is 1-3mm In the agent container, the amount of diatomite is 100g; the solution is completely immersed in diatomite; after the mixture is placed at room temperature for 7 days, the excess liquid is filtered off, dried naturally for 3 days, and loaded into the oxidant purification tower in layers. Seal with a filter screen; the working temperature of the oxidant p...

Embodiment 2

[0030] A method for purifying hydrogen sulfide and phosphine in the production of acetylene by a calcium carbide method, comprising the following steps:

[0031] (1) Crude acetylene gas is first processed through the oxidant purification tower, which is equipped with filler one, and the preparation method of filler one is as follows: the packing density of the filler is 0.65g / cm 3 Get mass concentration and be 41% ferric chloride solution 100mL, be that the sodium hydroxide solution of 5% mass concentration is to adjust pH value to be 4~6 with mass concentration, pour into the diatomaceous earth adsorption that granular particle diameter is 1-3mm In the agent container, the amount of diatomite is 100g; the solution is completely immersed in diatomite; after the mixture is placed at room temperature for 7 days, the excess liquid is filtered off, dried naturally for 5 days, and loaded into the oxidant purification tower layer by layer. Seal with a filter screen; the working temp...

Embodiment 3

[0035] A method for purifying hydrogen sulfide and phosphine in the production of acetylene by a calcium carbide method, comprising the following steps:

[0036] (1) Crude acetylene gas is first processed through the oxidant purification tower, which is equipped with filler one, and the preparation method of filler one is as follows: the packing density of the filler is 0.65g / cm 3 Get mass concentration and be 38% ferric trichloride solution 100mL, be that the sodium hydroxide solution of 3% mass concentration is to adjust pH value to be 4~6 with mass concentration, pour into the diatomaceous earth adsorption that granular particle diameter is 1-3mm In the agent container, the amount of diatomite is 100g; the solution is completely immersed in diatomite; after the mixture is placed at room temperature for 7 days, the excess liquid is filtered off, dried naturally for 4 days, and loaded into the oxidant purification tower layer by layer. Seal with a filter screen; the working t...

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Abstract

The invention discloses a purification method for hydrogen sulfide and hydrogen phosphide in acetylene production by calcium carbide method, and the method comprises the following steps of: firstly treating crude acetylene gas by an oxidant purification tower, which is filled with filler I prepared from ferric trichloride and diatomite; performing treatment by the oxidant purification tower, thenenabling the wastewater to enter a dehydration purification tower to be treated; wherein the dehydration purification tower is filled with filler II, which is specifically calcium carbide for filtering dust; the method solves the problems of waste liquid treatment in a wet process, and no waste liquid treatment and discharge problem exists, treatment of water contained in acetylene gas is simple and feasible, a better and more stable purification effect is achieved, and meanwhile the method is suitable for being used in processes with high content of hydrogen sulfide and hydrogen phosphide; inaddition, filler filling and replacing are more convenient, the maintenance cost of the whole equipment is reduced, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the field of purification methods, in particular to a purification method for producing hydrogen sulfide and phosphine in acetylene by a calcium carbide method. Background technique [0002] Acetylene is the simplest alkyne, a flammable gas. There is a danger of violent explosion in liquid and solid state or in gaseous state and certain pressure. Factors such as heat, vibration and electric spark can cause explosion, so it cannot be stored or transported after pressurized liquefaction. It is hardly soluble in water, but easily soluble in acetone. At 15°C and a total pressure of 15 atmospheres, the solubility in acetone is 237 g / L, and the solution is stable. Therefore, in the industry, acetylene is pressed into a steel drum or steel tank filled with porous substances such as asbestos to absorb acetone for storage and transportation. [0003] Calcium sulfide, calcium phosphide and other impurities are contained in calcium carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/24C07C7/11C07C7/148
CPCC07C7/11C07C7/148C07C11/24
Inventor 陈军陈伟张秀梅
Owner NANJING SPECIAL GAS FACTORY
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