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Method for preparing methyl bromide, high-carbon hydrocarbon, methanol or dimethyl ether by bromine oxidation of methane

A high-carbon hydrocarbon and catalyst technology, applied in the field of methane bromination oxidation, can solve the problems of aggravating the greenhouse effect and wasting limited carbon resources

Inactive Publication Date: 2010-03-03
MICROVAST POWER SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CO and CO 2 emissions will not only aggravate the global greenhouse effect, but also a waste of limited carbon resources

Method used

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  • Method for preparing methyl bromide, high-carbon hydrocarbon, methanol or dimethyl ether by bromine oxidation of methane
  • Method for preparing methyl bromide, high-carbon hydrocarbon, methanol or dimethyl ether by bromine oxidation of methane
  • Method for preparing methyl bromide, high-carbon hydrocarbon, methanol or dimethyl ether by bromine oxidation of methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] Example 1: Low CH 4 / O 2 Feed ratio case, adding a single CO 2 bromination reaction of methane

[0126] Under the same reaction conditions as in Comparative Example 1, a certain amount of CO was added before the feed gas entered the reactor. 2 , CO 2 Commercial finished CO desorbed by industrial decarbonization processes from outside the reaction 2 . After the reaction was stable for 2 hours, samples were taken to analyze the content of components in the tail gas.

[0127] When a certain amount of CO is added before the feed gas enters the reactor 2 Afterwards, methane conversion, methyl bromide yield, dibromomethane yield, CO yield, CO 2 The yields are shown in Table 1.

[0128] CO 2 The yield of the added CO 2 Does not participate in the reaction calculation, that is, the CO in the mixed gas at the outlet of the first-stage reactor 2 The amount of CO added to the first-stage reactor 2 The ratio of the difference between the amount of the product and the am...

Embodiment 2

[0132] Example 2: Low CH 4 / O 2 Oxidation of methane with a single addition of CO at the feed ratio

[0133] Under the same reaction conditions as in Comparative Example 1, a certain amount of CO was added before the feed gas entered the reactor, and the CO came from the commercial finished product CO obtained through the industrial steam reforming process outside the reaction. After the reaction was stable for 2 hours, samples were taken to analyze the content of components in the tail gas.

[0134] When a certain amount of CO is added before the feed gas enters the reactor, the yield of CO is calculated based on the fact that the added CO does not participate in the reaction, that is, the amount of CO at the outlet of the first-stage reactor is equal to the amount of CO added in the first-stage reactor The ratio of the difference in the amount of the amount to the amount of methane in the raw material, and the yield of other products refers to the ratio of the amount of th...

Embodiment 3

[0138] Example 3: Low CH 4 / O 2 In the case of feed ratio, adding carbon oxides (CO and CO 2 ) methane bromination oxidation reaction

[0139] Operated under the same reaction conditions as in Comparative Example 1. Introduce 5mL / min of CO into the first stage reactor 2 And a certain amount of CO, where CO comes from the commercial finished CO obtained from the industrial steam reforming process outside the reaction, CO 2 Commercial finished CO desorbed by industrial decarbonization processes from outside the reaction 2 . Repeat the previous reaction operation. After the reaction was stable for 2 hours, samples were taken to analyze the content of components in the tail gas.

[0140] When a certain amount of CO and CO are added before the feed gas enters the reactor 2 Afterwards, methane conversion, methyl bromide yield, dibromomethane yield, CO yield, CO 2 The yields are shown in Table 3.

[0141] CO 2 The yield of the added CO 2 Does not participate in the reacti...

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Abstract

The invention relates to a method for bromine oxidation reaction of methane. In the process that methyl bromide is produced by oxybromination of methane, and high-carbon hydrocarbon, methanol or dimethyl ether is produced by the methyl bromide, the byproducts of CO and CO2 generated by the reaction process are directly circulated back into a first-stage reactor and are unnecessary to be dischargedout of a device. Simultaneously, a certain amount of the CO and the CO2 from the outside can also be added into the first-stage reactor. Thus, the zero discharge of the waste gases of the CO and theCO2 is achieved under the condition that the yield of the main product methyl bromide is not reduced.

Description

technical field [0001] The invention belongs to the field of natural gas synthesis of chemical raw materials, in particular to a method for methane bromination oxidation. Background technique [0002] The main component of natural gas is methane, with small amounts of ethane, propane, water vapor and carbon dioxide. Natural gas is the most abundant hydrocarbon fossil resource besides coal, and it can theoretically be used as a chemical raw material to produce other chemicals. However, due to the stable chemical properties of methane itself and the physical properties that are difficult to compress and liquefy, and the rich sources of methane are often far away from the areas where it is used, the current methane utilization is mainly focused on providing heat as fuel. Due to rising international oil prices and depleted oil reserves, the conversion and utilization of methane has gradually attracted the attention of scientific and industrial circles all over the world. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/10C07C19/075C07C1/26C07C29/09C07C31/04C07C41/01
Inventor 刘振李文生周小平
Owner MICROVAST POWER SYST CO LTD
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