Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing vinyl monomers and vinyl chloride monomers

A technology of vinyl chloride monomer and ethylene, applied in the field of joint preparation of ethylene and vinyl chloride monomer, can solve the problems of high pollution, high energy consumption, etc., and achieve the effect of high flexibility, clean production process and environmental protection

Active Publication Date: 2017-01-04
YIBIN TIANYUAN GRP CO LTD
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has two main disadvantages. One is the need to use mercury catalysts that pollute the environment; the other is that the calcium carbide used to produce acetylene has high energy consumption and high pollution problems in the production process.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing vinyl monomers and vinyl chloride monomers
  • Method for preparing vinyl monomers and vinyl chloride monomers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] After dissolving a certain mass of precursors of barium, tungsten, cerium and potassium in water, adding silicon-aluminum molecular sieves and stirring evenly, drying and roasting to obtain a catalyst, the molar ratio of methane, methyl chloride and oxygen is 1:0.01:0.2 After mixing, it is passed into the reactor, the reaction temperature is 900°C, and the reaction pressure is normal pressure. The reaction effluent is washed with water and alkali to remove hydrogen chloride, condensed to remove water, and the composition is analyzed. The conversion rate of methane and methyl chloride is calculated according to the carbon balance before and after the reaction. Ethylene and vinyl chloride selectivities were calculated using carbon product normalization. The one-pass conversion rate of methane can reach 45%, all the methyl chloride can be converted, the selectivity of ethylene can reach 50%, and no vinyl chloride is detected.

Embodiment 2

[0038] After dissolving a certain mass of precursors of barium, tungsten, cerium and potassium in water, adding silicon-aluminum molecular sieves and stirring evenly, drying and roasting to obtain a catalyst, the molar ratio of methane, methyl chloride and oxygen is 1:0.5:0.4 After mixing, it is passed into the reactor, the reaction temperature is 800°C, and the reaction pressure is normal pressure. The reaction effluent is washed with water and alkali to remove hydrogen chloride, condensed to remove water, and the composition is analyzed. The conversion rate of methane and methyl chloride is calculated according to the carbon balance before and after the reaction. Ethylene and vinyl chloride selectivities were calculated using carbon product normalization. The single-pass conversion rate of methane is about 40%, the single-pass conversion rate of methyl chloride is 75%, the selectivity of ethylene is 45%, and the selectivity of vinyl chloride is 28%.

Embodiment 3

[0040] After dissolving a certain mass of precursors of barium, tungsten, cerium and potassium in water, adding silicon-aluminum molecular sieves and stirring evenly, drying and roasting to obtain a catalyst, the molar ratio of methane, methyl chloride and oxygen is 1:1:1 After mixing, it is passed into the reactor, the reaction temperature is 700°C, and the reaction pressure is normal pressure. The reaction effluent is washed with water and alkali to remove hydrogen chloride, condensed to remove water, and the composition is analyzed. The conversion rate of methane and methyl chloride is calculated according to the carbon balance before and after the reaction. Ethylene and vinyl chloride selectivities were calculated using carbon product normalization. The single-pass conversion rate of methane is 38%, the single-pass conversion rate of methyl chloride is 80%, the selectivity of ethylene is 25%, and the selectivity of vinyl chloride is 55%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for preparing vinyl monomers and vinyl chloride monomers. According to the method, the vinyl monomers and vinyl chloride monomers are synthesized by the reaction of methane, chloromethane and oxygen in presence of catalysts for oxidative coupling of methane, and the mole ratio of the sum of methane and chloromethane to oxygen is 1:(0.1-2), the mole ratio of methane to chloromethane is 1:(0.01-5); the reaction temperature of the reaction is 500-900 DEG C, and the reaction pressure of the reaction is 1-10 atm. The method has the advantages of wide raw material sources, low cost, the method is a novel technology for preparing vinyl monomers and vinyl chloride monomers, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a method for jointly preparing ethylene and vinyl chloride monomers, in particular to a method for preparing ethylene monomers and vinyl chloride monomers through the coupling reaction of methane and methyl chloride plus oxygen. Background technique [0002] Ethylene is one of the largest chemical products in the world. The ethylene industry is the core of the petrochemical industry. Ethylene products account for more than 75% of petrochemical products and occupy an important position in the national economy. The world has taken ethylene production as one of the important symbols to measure the development level of a country's petrochemical industry. Ethylene used in industry is mainly separated from the gas produced by petroleum refineries and petrochemical plants. The ethylene preparation process mainly uses ethane, propane and naphtha as raw materials to produce by steam cracking, and sometimes gasoline dehydrogenation and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/84C07C2/88C07C1/26C07C1/30C07C11/04C07C17/269C07C21/06B01J29/076
CPCB01J29/076B01J2229/18C07C1/26C07C1/30C07C2/84C07C2/88C07C17/269C07C2529/076C07C11/04C07C21/06Y02P20/52
Inventor 罗云徐慧远邓敏师海波周杰
Owner YIBIN TIANYUAN GRP CO LTD