Polyvinyl chloride loop route production method

A technology of polyvinyl chloride and production method, which is applied in the fields of dehydrohalogenation preparation, organic chemistry, hydrogen halide addition preparation, etc., can solve the problems of high energy consumption, mercury pollution by calcium carbide method, etc., achieves low production energy consumption, avoids petroleum Dependence on resources and the effect of less investment in equipment

Inactive Publication Date: 2013-11-27
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide an environmentally friendly, energy-saving and efficient PVC production method, especially for the preparation of PVC based on mineral-rich limestone that does not rely on petroleum resources, and solves the problems of mercury pollution and high energy consumption in the existing calcium carbide method. Realize green production with environmental protection and energy saving

Method used

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  • Polyvinyl chloride loop route production method
  • Polyvinyl chloride loop route production method
  • Polyvinyl chloride loop route production method

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Embodiment 1

[0021] Embodiment one, basic loop method PVC production technology

[0022] The polyvinyl chloride basic loop method technological process of the present embodiment is as Figure 4 As shown, the production process and equipment implementation plan are as follows:

[0023] 1) Initial: The oxygen-enriched calcium carbide furnace adopts a shaft furnace, and a raw material pretreatment and mixing device is used to prepare limestone powder and coal powder, and a uniform mixture of limestone powder and coal powder with strict ratio requirements is delivered to the furnace. Stable reaction with oxygen under the optimized process conditions, the upper part exports the synthesis gas CO, and the lower part exports calcium carbide, such as Figure 4 As shown, enter the next process from the left and right sides respectively.

[0024] 2) Left path: export calcium carbide from the shaft furnace reactants, use waste heat to utilize high-efficiency acetylene generator, make calcium carbide...

Embodiment 2

[0028] Embodiment two, extended loop method PVC production process

[0029] The polyvinyl chloride extended circular route of this embodiment is to use the diversity of resource structures in different countries and regions. An open window is set in the middle link of the basic circular route to accept the addition of external intermediate raw materials, such as Figure 5 Shown is a specific feasible solution:

[0030] in the above Figure 4 In the basic circular process flow shown, when the acetylene in the left path can be supplemented by natural gas resources, the right path can be supplemented by bioethanol from natural resources.

[0031] In addition, as in image 3 In the green PVC production process shown in the loop method, if any part of the closed loop is turned into an open-loop process, it can become a feasible production process. figure 1 and figure 2 The two current processes shown can be regarded as open-loop process routes formed by removing some units in ...

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Abstract

The invention provides a polyvinyl chloride loop route production method (short for loop route method), and belongs to the field of new coal chemical industry materials and the technical field of polymer material science and engineering, and relates to a polyvinyl chloride green production technology with characteristics of high efficiency, energy saving, and environmental protection. According to the method, actual production starts from an oxygen-rich calcium carbide high temperature reaction furnace, oxygen-rich calcium carbide reacts in the high temperature reaction furnace to obtain a solid product calcium carbide and synthesis gas carbon monoxide, the subsequent process is divided into two branches, one branch process is preparing acetylene from the calcium carbide, the other branch process is preparing ethanol from the synthesis gas carbon monoxide, and then preparing dichloroethane through ethanol chlorination, a closed loop is formed after the two branch reactions are completed and combined, both end products acetylene and dichloroethane can be subjected to a reaction by using a mercury-free catalyst to prepare a vinyl chloride monomer, and the existing technology can be adopted to prepare the PVC from the vinyl chloride monomer. According to the present invention, the reacting calcium carbide residue can be used for producing cement, and the synthesis gas CO can completely participate in the subsequent reactions so as to achieve zero emission; and the expansion loop method can be adopted to achieve multi-function and multi-efficacy co-production operation.

Description

technical field [0001] The invention relates to an environment-friendly, energy-saving and high-efficiency polyvinyl chloride circular synthesis route green production method. It belongs to the field of coal chemical new materials and the field of polymer material science and engineering technology. Background technique [0002] Polyvinyl chloride (hereinafter referred to as PVC) is the most widely used variety among the five general-purpose resins. It is widely used in many fields such as construction, automobiles, high-speed rail, ships, aerospace, and national defense. It plays a very important role in national economic and social development. . Taking building materials as an example, compared with traditional materials, PVC is more energy-efficient in production and use. Therefore, PVC doors and windows have long been popularized in developed countries in Europe and the United States, and China has also listed it as a key recommended chemical building material. The cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C21/06C07C17/25C07C17/08C08F14/06
CPCY02P20/10
Inventor 刘东升杨卫民阎华
Owner BEIJING UNIV OF CHEM TECH
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