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Polyoxymethylene dimethyl ether synthesis and separation system

A polyoxymethylene dimethyl ether and separation system technology, applied in the direction of distillation separation, separation method, fractionation, etc., can solve the problems of high production investment cost, low synthesis conversion rate and yield, etc., and achieve efficient use of energy, energy The effect of reducing consumption and reducing the amount of formic acid easily disproportionated at high temperature

Pending Publication Date: 2019-11-26
无锡赫利邦化工科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a polyoxymethylene dimethyl ether synthesis and separation system to solve the problems of high production investment cost, low synthetic conversion rate and yield in the above-mentioned background technology

Method used

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  • Polyoxymethylene dimethyl ether synthesis and separation system
  • Polyoxymethylene dimethyl ether synthesis and separation system
  • Polyoxymethylene dimethyl ether synthesis and separation system

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Embodiment

[0032] The high-concentration formaldehyde with a mass concentration of 81% and the methylal stream with a mass concentration of 92% are pumped to the pre-reactor 100 through the formaldehyde pipe 110 and the methylal pipe 120 respectively, and reacted in the pre-reactor 100 to obtain a crude reaction liquid , And discharged through the crude reaction liquid pipe 130, preheated to 80 ℃ high-concentration formaldehyde and heated and pressurized methylal, temperature 60 ℃, pressure 0.2Mpa, the mass ratio of formaldehyde to methylal in the reactant is 1 :1;

[0033] Pipeline composition formaldehyde% water% Methanol% Methylal% Dmm2-8% Formaldehyde tube81％18.01.0-- Methylal tube920.57.5-- Coarse reaction liquid tube 20.254.885.8869.0-

[0034] After reacting in the pre-reactor 100, it can be seen that the water conversion rate is about 20%, the methylal conversion rate is 30.7%, and the formaldehyde conversion rate is 17.1%. A large amount of water is converted, and the water ...

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Abstract

The invention belongs to the technical field of polyoxymethylene dimethyl ether synthesis and separation, and discloses a polyoxymethylene dimethyl ether synthesis and separation system. The polyoxymethylene dimethyl ether synthesis and separation system comprises a pre-reactor; a material inlet of the pre-reactor is connected with a formaldehyde pipe and a methylal pipe respectively; a material outlet of the pre-reactor is connected with a crude reaction solution pipe; one end of the crude reaction solution pipe is connected with a catalytic rectifying tower; the catalytic rectifying tower comprises an up-down reaction section, and a stripping section; a top material port of the reaction section is connected with an un-reacted methylal raw material pipe; an external wall material port ofthe reaction section is connected with an un-reacted formaldehyde raw material pipe; the external wall of the stripping section is provided with a catalytic rectifying tower reboiler; a bottom material port of the stripping section is connected with a finished product pipe; the finished product pipe is provided with a finished product extraction pipe; the un-reacted formaldehyde raw material pipeis provided with an intermediate reaction liquid extraction pump; one end of the un-reacted formaldehyde raw material pipe is connected with an externally hung reactor; and a material port of the externally hung reactor is connected with a methylal ratio pipe.

Description

Technical field [0001] The invention discloses a polymethoxy dimethyl ether synthesis and separation system, specifically in the technical field of polymethoxy dimethyl ether synthesis and separation. Background technique [0002] Global energy has entered a period of serious exploitation. High-quality energy is becoming less and less, and energy prices are increasing. After the special crude oil crisis, countries have gradually started to reduce production and increase crude oil prices. Oil prices will gradually rise in the future. The characteristics of my country's energy structure are: rich in coal, poor in oil, and low in gas. The sustained and rapid economic growth has increased the demand for energy, and the contradiction between social and economic development and oil supply has become increasingly prominent. The development of coal liquefaction technology is undoubtedly of strategic importance. In addition, my country's methanol production capacity is seriously surpl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00B01J19/24B01J8/02B01J8/04B01D3/14B01D3/00C07C41/56C07C43/30C07C41/58
CPCB01J19/00B01J19/0053B01J19/245B01J8/04B01J8/02B01D3/009B01D3/14C07C41/56C07C41/58C07C43/30Y02P20/10
Inventor 梁旭孙维毅
Owner 无锡赫利邦化工科技有限公司
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