Equilibrium reactions and gas/liquid reaction in a loop reactor

A loop reactor and reactor technology, applied in the chemical method of reacting liquid and gas medium, chemical/physical/physical chemical fixed reactor, chemical/physical/physical chemical nozzle reactor, etc., can solve Expensive and complicated equipment and process technology

Inactive Publication Date: 2006-10-18
EVONIK DEGUSSA GMBH
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Problems solved by technology

However, the equipment and process technology are expensive and complicated

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  • Equilibrium reactions and gas/liquid reaction in a loop reactor
  • Equilibrium reactions and gas/liquid reaction in a loop reactor
  • Equilibrium reactions and gas/liquid reaction in a loop reactor

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Embodiment 1

[0061] with a loop reactor of capacity 501 figure 1 In the plant shown, initially 40 kg of high boiling polyether alcohol were charged into the reactor. The polyether alcohols used are alkenyl-started polyethers of the form,

[0062] R 1 -(OC 2 h 3 Me) n -(OC 2 h 4 ) m -OH

[0063] in

[0064] R 1 is an alkenyl group having 3 carbon atoms,

[0065] n is 13 and m is 4.

[0066] Then measure 15 kg of 30% sodium methoxide methanol solution into the polyether alcohol in the reactor. In the closed condensation loop with valve 3 closed and valve 4 open, the reactants react at 110°C according to equilibrium reaction I, during which methanol is condensed down in condenser 5 until it reaches the condensation temperature of -15°C (initial stage). The partial pressure of methanol in the gas phase was determined from the condensation temperature and the residual methanol content in the liquid phase was determined by phase equilibrium, which corresponds to the poin...

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Abstract

Process for performing two chemical reactions in a loop reactor comprises an optionally catalyzed equilibrium reaction of at least two high-boiling liquid reactants, in which one high boiler is formed as an intermediate and at least one low boiler as a by-product; and a substantially diffusion-controlled reaction in which the liquid intermediate is reacted with at least one gaseous reactant give the end product. Process for performing two chemical reactions in a loop reactor comprises: an optionally catalyzed equilibrium reaction of at least two high-boiling liquid reactants, in which one high boiler is formed as an intermediate and at least one low boiler as a by-product; and a substantially diffusion-controlled reaction in which the liquid intermediate is reacted with at least one gaseous reactant to give the end product, where both the reactions, optionally after a start phase, are allowed to proceed simultaneously in the same loop reactor, and the loop reactor has a connectable gas-liquid circulation system coupled via an ejector mixing nozzle, in which circulated liquid phase is mixed in the ejector mixing nozzle with newly supplied gaseous reactant aspirated by means of the ejector from the reactor via a connectable condenser and fed to the reactor by a liquid jet ejector for the reaction, the low-boiling by-product(s) of reaction and also any low-boiling solvent being condensed and discharged in the condenser continuously over the duration of the process.

Description

technical field [0001] The present invention relates to a method for simultaneously carrying out two continuous chemical reactions in a loop reactor with a liquid jet ejector and a closed condensation system. In particular, the invention relates to a process for the etherification of high-boiling polyether alcohols. Background technique [0002] Some methods of producing chemicals involve two or more sequential chemical reactions, interdependent reactions, one of which is an equilibrium reaction, such as between high-boiling liquid reactants; The reactions are basically diffusion-controlled reactions in which a liquid intermediate product of a first reaction reacts with at least one gaseous reactant to form a final product. Currently, such methods of producing chemicals are produced on an industrial scale by combining the two reactions in a spatially , temporally and / or technologically separated. [0003] For example, in the industrial-scale Williamson (Williamson) method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J10/00B01J19/00B01J19/24B01J19/26
CPCB01J19/1837B01J8/067B01J2208/00212B01J2219/00024B01J2219/00094C07C41/16C08G65/00C08G65/2696
Inventor 彼得·克拉默尔斯格哈德·克滕巴赫安德烈亚斯·泽尔曼福尔克尔·策尔默
Owner EVONIK DEGUSSA GMBH
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