An energy-saving production system and method for monochloromethane

A monochloromethane and production method technology, applied in the field of monochloromethane energy-saving production systems, can solve the problems of unreasonable use of reaction heat and consumption of external cooling capacity, so as to save cooling capacity and production and operation costs, reduce recovery costs, The effect of reducing usage

Active Publication Date: 2020-11-20
SEDIN NINGBO ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above process, the reaction is an exothermic reaction, and the raw material methanol is heated and vaporized by external heat. In this process, the heat of reaction has not been rationally utilized, and the reaction product is cooled by circulating water, and the reaction temperature is controlled by the condensed stream cycle. external cooling

Method used

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  • An energy-saving production system and method for monochloromethane
  • An energy-saving production system and method for monochloromethane
  • An energy-saving production system and method for monochloromethane

Examples

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Embodiment 1

[0041] Such as figure 1 As shown, an energy-saving production system for monochloromethane includes a reactor 1, a methanol vaporizer 2, and a condenser. The methanol vaporizer 2 is used to heat raw methanol and is connected to the reactor 1 through a pipeline. The system condenser includes a first condenser 3 and a second condenser 4 connected in series for condensing unreacted raw materials in the separated product.

[0042] Such as figure 2 As shown, the top of the reactor 1 is provided with a gas phase outlet 21, the wall of the reactor is sequentially provided with a liquid phase inlet 22, a return port 23 and a gas phase inlet 24, and the bottom of the reactor is provided with a liquid phase outlet 25. A liquid phase distributor 11, a tray gas phase distributor 12 and a tray 13 are installed in the reactor 1, the installation position of the liquid phase distributor 11 corresponds to the liquid phase inlet 22, and the position of the gas phase distributor 12 correspond...

Embodiment 2

[0046] In this embodiment, on the basis of the above embodiments, the first temperature regulating valve 5 is installed on the first circulation line 74 , and the second temperature regulating valve 6 is installed on the return line 76 . The first temperature regulating valve 5 controls the output temperature of the methanol vaporizer 2 by adjusting the flow rate of the production liquid at the bottom of the reaction kettle 1 . The second temperature regulating valve 6 controls the reaction temperature in the reactor 1 by adjusting the reflux flow rate of the condensate in the first condenser 3 . The temperature automatic control valve can effectively guarantee the stability of the process parameters and the stable operation of the reaction.

Embodiment 3

[0048] In this implementation, on the basis of the above-mentioned embodiments, the number of the trays 13 is 1 to 10, which are designed and selected according to the reaction parameters. The form of the tray 13 may be any one of a sieve tray, a bubble cap tray or a valve tray. And the material of the tray 13 can be selected from 1Cr18Ni9Ti, 00Cr17Ni 14Mo2, 00Cr18Ni5Mo3Si2, Hastelloy, NI+Q345R, TA+Q345R and other anti-corrosion materials.

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Abstract

The invention discloses an energy-saving methane chloride production method. The method includes: liquid raw material methanol is heated in a methanol vaporizer, and the methanol is mixed with hydrogen chloride and then enters a reaction kettle through a gas-phase inlet in the lower portion of the reaction kettle; the kettle-bottom produced liquid of the reaction kettle is used as the heating medium of the methanol vaporizer, and the kettle-bottom produced liquid is subjected to heat exchanging through the methanol vaporizer and circulated to a liquid-phase inlet in the upper portion of the reaction kettle; liquid and gas are in continuous countercurrent contact on a tower plate or filler in the reaction kettle; high-temperature mixed gas in the reaction kettle escapes from the top of thereaction kettle, and the gas is cooled by a first condenser and a second condenser and then conveyed to a purification system. The invention further discloses an energy-saving production system used for achieving the method above. The method has the advantages that heat flow produced at the bottom of the reaction kettle and the raw material methanol are subjected to heat exchanging in the methanolvaporizer, the heat carried by the high-temperature heat flow is recycled effectively, reaction heat is utilized sufficiently, all steam needed by methanol preheating and vaporization is saved, and an evident energy saving effect is achieved.

Description

technical field [0001] The invention relates to the field of monochloromethane production technology, in particular to a monochloromethane energy-saving production system and method. Background technique [0002] Chloromethane is an important raw material for the synthesis of methylchlorosilane, cellulose ester, quaternary ammonium compounds, herbicides and other chemical products. With the rapid development of domestic organic silicon, methyl cellulose and other products market, the market demand for raw material monochloromethane is rising rapidly. [0003] At present, the production methods of monochloromethane mainly include methane chlorination and methanol hydrochlorination. The methane chlorination method refers to the reaction of chlorine gas and methane as raw materials to generate polychlorinated compounds, such as monochloromethane, dichloromethane, trichloromethane, tetrachloromethane, etc. Its disadvantage is that there are many types of products, and it is no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/16C07C17/38C07C17/383C07C19/03
CPCC07C17/16C07C17/38C07C17/383C07C19/03
Inventor 庄志海李全王宇光谷新春陶小钰王刚厉相娄哲翔贾峰蒋瑶何靓施操孔令琪
Owner SEDIN NINGBO ENG
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