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Method for preparing zinc cyanide co-production mixed sulfate by light oil cracking waste residue

A light oil cracking and zinc cyanide technology, applied in the direction of metal cyanide, etc., can solve the problem of not completely eradicating waste residues, etc., and achieve the effects of simple and easy-to-obtain equipment, low energy consumption and low cost

Inactive Publication Date: 2011-02-02
汪晋强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the waste residue can meet the requirements of environmental protection, this method does not completely eradicate the CN in the waste residue. - , but only to control its content in the range of less than 0.5ppm
There is also no report on the method of preparing zinc cyanide and co-producing mixed sulfate with light oil cracking waste residue

Method used

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  • Method for preparing zinc cyanide co-production mixed sulfate by light oil cracking waste residue
  • Method for preparing zinc cyanide co-production mixed sulfate by light oil cracking waste residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The method for preparing zinc cyanide and co-producing mixed sulfate from light oil cracking waste residue comprises the following preparation steps:

[0028] Step A, put the waste residue obtained in the process of cracking the light oil into the product, put it into the washing tank 1, stir and wash it three times with a zinc sulfate solution with a temperature of 40° C. and a volume concentration of 5%, and wash for half an hour each time;

[0029] Step B, filter the mixture after each washing in step A with filter 2;

[0030] Step C, the filter cake obtained by filtering in step B is sent to incineration;

[0031] Step D, the filtrate obtained by filtering three times in step B is sent to the vacuum distiller-3 together for low-temperature distillation, and the distillation temperature is 60°C;

[0032] Step E, cooling the liquid distilled in step D through cooler-4 to obtain zinc cyanide crystal 5;

[0033] Step F, sending the remaining liquid in the step E to th...

Embodiment 2

[0035] The method for preparing zinc cyanide and co-producing mixed sulfate from light oil cracking waste residue comprises the following preparation steps:

[0036] Step A, put the waste residue obtained in the process of cracking the light oil into the product, put it into the washing tank 1, stir and wash it three times with a zinc sulfate solution with a temperature of 45° C. and a volume concentration of 6%, and wash for half an hour each time;

[0037] Step B, filter the mixture after each washing in step A with filter 2;

[0038] Step C, the filter cake obtained by filtering in step B is sent to incineration;

[0039] Step D, the filtrate obtained by filtering three times in step B is sent together to carry out low-temperature distillation in the vacuum distiller-3, and the distillation temperature is 40° C.;

[0040] Step E, cooling the liquid distilled in step D through cooler-4 to obtain zinc cyanide crystal 5;

[0041] Step F, sending the remaining liquid in the s...

Embodiment 3

[0043] The method for preparing zinc cyanide and co-producing mixed sulfate from light oil cracking waste residue comprises the following preparation steps:

[0044] Step A, put the waste residue obtained in the process of cracking the light oil into the product, put it into the washing tank 1, and wash it three times with a zinc sulfate solution with a temperature of 50° C. and a volume concentration of 6%; each time for half an hour;

[0045] Step B, filter the mixture after each washing in step A with filter 2;

[0046] Step C, the filter cake obtained by filtering in step B is sent to incineration;

[0047] Step D, the filtrate obtained by filtering three times in step B is sent together to carry out low-temperature distillation in vacuum distiller-3, and the distillation temperature is 45° C.;

[0048] Step E, cooling the liquid distilled in step D through cooler-4 to obtain zinc cyanide crystal 5;

[0049] Step F, sending the remaining liquid in the step E to the vacuu...

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Abstract

The invention relates to the technical field of comprehensive treatment and utilization of light oil cracking waste residue, in particular to a method for preparing zinc cyanide co-production mixed sulfate by the light oil cracking waste residue, and the main technical scheme comprises the following steps: washing the light oil cracking waste residue by zinc sulfate solution with the temperature of 40-60DEG C and the concentration of 5-10 percent, after air pump filtration, putting the waste residue into a reduced pressure distiller, performing low-temperature reduced pressure distillation and cooling to obtain zinc cyanide crystal, and distilling the residual liquid again to obtain the mixed sulfate. The method has not only simple and practicable preparation process and equipment but also low cost, and can remove the effect on the environment and creat products having certain economic value.

Description

technical field [0001] The invention relates to the technical field of comprehensive treatment and utilization of cyanide waste residue, in particular to a method for preparing zinc cyanide and co-producing mixed sulfate by using light oil cracking waste residue. technical background [0002] The light oil cracking method mainly uses light diesel oil mixed with ammonia to carry out the cracking reaction in an electric arc furnace, uses petroleum coke as a carrier, and uses nitrogen gas for airtight anti-oxidation. After generating hydrogen cyanide, absorb it with sodium hydroxide to produce sodium cyanide. It reacts as follows: [0003] C 6 h 14 +6NH 3 =6HCN+13H 2 ↑ [0004] HCN+NaOH=NaCN+H 2 o [0005] Due to incomplete collection or reaction, the waste residue produced by light oil cracking contains impurities mainly HCN and NaCN. After testing, the cyanide content of the tailing slag is 40-500 mg / kg. Due to its toxicity, cyanide Its production enterprises belong ...

Claims

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Application Information

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IPC IPC(8): C01C3/08
Inventor 王嘉兴
Owner 汪晋强
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