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Coupling equipment of reaction and separation

A coupling device and reaction technology, applied in chemical/physical/physicochemical processes, chemical instruments and methods, chemical/physical processes, etc., can solve problems that are difficult to achieve, heat transfer, mass transfer and mixing efficiency are not high, and cannot be performed, etc. problems, to achieve the effect of reducing side reaction products, waste discharge, clean production, and reducing waste generation

Inactive Publication Date: 2002-11-20
WUHAN CHEM COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the by-product is a heavier component than the reactant, or cannot form an azeotrope with a certain reactant, the above process is difficult to realize; if the by-product is a gas that is not easily liquefied, the process is also difficult to realize; for gas-liquid reactions , gas-liquid-solid three-phase reaction, the above process can not be carried out
In addition, the tank reactor it chooses has the defects of low heat transfer, mass transfer and mixing efficiency
In short, the application of rectification reactor has certain limitations

Method used

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  • Coupling equipment of reaction and separation
  • Coupling equipment of reaction and separation

Examples

Experimental program
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Effect test

example 1

[0018] Example 1. Apparatus for chemical reaction (1):

[0019] aA (l) +bB (l) =cC (l) +dD (g) ……(1)

[0020] In the formula: A and B are reactants (liquid under reaction temperature and pressure),

[0021] C is the reaction main product (liquid under reaction temperature and pressure),

[0022] D is reaction by-product (gas under reaction temperature, pressure, as HCl, NO 2 、H 2 S, HF, NH 3 Wait).

[0023] The device shown in Fig. 1 is designed for chemical reaction (1), and it comprises reactor and the circulation pump 9 that is connected with it, sparger 12 and as the liquid phase circulation pipeline of chemical reaction circulation and its filling with fixed bed The catalyst column also includes a gas phase circulation pipeline as a separation cycle, and the gas phase circulation pipeline is connected to the chemical separation equipment 15 and the reactor through the gas phase circulation ejector inlet pipe 14 and the gas phase circulation separa...

example 2

[0027] Example 2. Apparatus for chemical reaction (2):

[0028] aA (l) +bB (l) =cC (l) +dD (l) …….(2)

[0029] In the formula: A, B, C, and D are all liquids under the reaction conditions, but A or B is in a saturated liquid state.

[0030] A, B, and D are more volatile than C.

[0031] C is the main product and D is the by-product (H 2 O, CH 3 OH, CH 3 CH 2 OH, etc.) can be volatile to gas at operating temperature.

[0032] This device is similar to example 1 device, and difference is: just chemical separation equipment 15 changes rectifying tower into. Reactor 1 is the main reaction area, on which there is a heating jacket 6, and a heat exchange jacket 8 is also arranged on the liquid circulation pipe. If the heat transfer surface is not enough, the liquid circulation pipe can be changed into two or more pipes in parallel for use. To increase the heat transfer area to facilitate heating or remove heat.

[0033]The reactants are heated to a certain...

example 3

[0035] Example 3. Apparatus for chemical reaction (3):

[0036] aA (G) +bB (L) cC (l) +dD (G) ...(3)

[0037] In the formula: under reaction condition, reactant A is gas (such as H 2 、HN 3 、CI 2 , CO, etc.),

[0038] Reactant B is a liquid;

[0039] The main product C is liquid;

[0040] The by-product D is gas (can be separated by acid or lye or adsorbent);

[0041] The catalyst for the reaction is a homogeneous or fixed-bed catalyst.

[0042] The difference of this device and example 1 device is: just reactor is a volume and cylinder diameter less reaction tower 17 (Fig. 3), therefore, the residence time of gas-liquid mixture in tower is shorter, the time of gas-liquid separation It is also shorter, so that the gas holdup in the liquid phase entering the liquid phase circulation pipe remains high. The injector is arranged at the top of this column. The circulation pump can be an axial flow pump, or a centrif...

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Abstract

The reaction-separation coupling equipment incldues reactor, circulating pump and sprayer which are connected with the reactor and liquid phase circulating pipeline as chemical reaction circulation and gas phase circulating pipeline for separation circulation which is connected with chemical separation equipment and reactor. Its operation process includes the following steps: the raw material heated in the reactor is pumped out by circulating pump, passed through the liquid phase circulating pipeline and sprayer, and high-speed sprayed into the interior of reactor so as to form liquid phase circulation, at the same time the gas in the reactor is passed through the gas phase circulating pipeline and chemical separation equipment and sprayed into the reactor so as to from gas phase circulation.

Description

technical field [0001] The invention relates to the field of chemical clean production technology and equipment in petrochemical, fine chemical, pharmaceutical and textile chemical industries, in particular to a coupling device for continuous and synchronous reaction and separation processes. Background technique [0002] At present, there are many types of industrial reactors, which can be divided into: tank reactors, tubular reactors (including loop reactors), tower reactors, fixed bed reactors, jet reactors, flow reactors, etc. according to their structural characteristics. Chemical bed reactors, moving bed reactors, and trickle bed reactors, etc., these reactors are mainly used as equipment for realizing chemical reactions, and most of the actual chemical reactions are reversible reactions with certain reaction equilibrium constants, so , the conversion rate of the target product of the reaction material flowing out of the reactor is not high, the reverse reaction rate i...

Claims

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Application Information

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IPC IPC(8): B01J19/00
Inventor 毕亚凡吴元欣李庆新王为国
Owner WUHAN CHEM COLLEGE
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