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Method for conducting catalytic hydrofinishing of polyoxymethylene dialkyl ether through slurry reactor

一种聚甲醛二烷基醚、甲醛二烷基醚的技术，应用在浆态床催化加氢精制聚甲醛二烷基醚领域，能够解决提取产物纯度差等问题

Active Publication Date: 2013-10-02
DONGFANG HONGSHENG NEW ENERGY APPL TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is to find out the reasons for the poor extraction rate of the extraction unit and the poor purity of the extraction product through in-depth research on the extraction unit process of polyoxymethylene dialkyl ether in the prior art, and then provide a method that can Method for significantly improving extraction rate and product purity by catalytic hydrogenation of slurry bed for refining polyoxymethylene dialkyl ether

Method used

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  • Method for conducting catalytic hydrofinishing of polyoxymethylene dialkyl ether through slurry reactor
  • Method for conducting catalytic hydrofinishing of polyoxymethylene dialkyl ether through slurry reactor
  • Method for conducting catalytic hydrofinishing of polyoxymethylene dialkyl ether through slurry reactor

Examples

Experimental program
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Effect test

Embodiment 1

[0046] First, 63g of Raney nickel Raney-Ni catalyst is loaded into a 2L pressurized slurry bed hydrofinishing reactor 4;

[0047] Then, 1260g of the equilibrium system containing polymethoxy dimethyl ether product is carried out catalytic hydrogenation refining, the usage amount of described Raney-Ni catalyst accounts for 5wt% of total reactant, and its technological condition is: hydrogen pressure 6Mpa, slurry State bed refining reaction temperature (i.e. hydrofining reaction temperature) 70°C, reaction time 4 hours;

[0048] Finally, formaldehyde is hydrogenated under the action of the Raney-Ni catalyst to generate methanol, and the generated methanol is used as one of the equilibrium product components, so that no other foreign components are produced while removing formaldehyde. The composition and distribution are shown in Table 2.

[0049] The equilibrium system after catalytic hydrofining is extracted. The extraction process adopts atmospheric distillation technology, ...

Embodiment 2

[0051] First, load 37.8g of Raney-Cu catalyst into a 2L pressurized slurry bed hydrofinishing reactor;

[0052] Then, 1260g of the equilibrium system containing polymethoxy dimethyl ether product is carried out catalytic hydrogenation refining, the usage amount of described Raney-Cu catalyst accounts for 3wt% of total reactant, and its technological condition is: hydrogen pressure 2Mpa, slurry State bed refining reaction temperature (i.e. hydrofining reaction temperature) 110°C, reaction time 4.5 hours;

[0053] Finally, formaldehyde is hydrogenated under the action of the Raney-Cu catalyst to generate methanol, and the generated methanol is used as one of the equilibrium product components, so that no other foreign components are produced while removing formaldehyde. The composition of the main materials before and after catalytic hydrorefining And the distribution is shown in Table 2.

[0054] In this embodiment, the same extraction process as in Example 1 is used for extra...

Embodiment 3-1

[0066] First, load 63g of Raney-Cu catalyst into a 2L pressurized slurry bed hydrofinishing reactor;

[0067] Then, 1260g of the equilibrium system containing polymethoxydiethyl ether product is carried out catalytic hydrogenation refining, the usage amount of described Raney-Cu catalyst accounts for 5wt% of total reactant, and its technological condition is: hydrogen pressure 3Mpa, slurry State bed refining reaction temperature (i.e. hydrofining reaction temperature) 100°C, reaction time 5 hours;

[0068] Finally, formaldehyde is hydrogenated under the action of the Raney-Cu catalyst to generate methanol, and the generated methanol is used as one of the equilibrium product components, so that no other foreign components are produced while removing formaldehyde, and the main material before and after catalytic hydrorefining The composition and distribution are shown in Table 4-1.

[0069] The refined equilibrium system is extracted. The extraction process adopts atmospheric d...

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Abstract

The invention relates to a method for conducting catalytic hydrofinishing of polyoxymethylene dialkyl ether through a slurry reactor. The method comprises the step of: by adopting a slurry hydrofinishing reactor, conducting catalytic hydrofinishing to a polyoxymethylene dialkyl ether product-containing balance system so as to remove polyoxymethylene contained therein. By adopting the hydrofinishing method, the extraction rate of the polyoxymethylene dialkyl ether can be remarkably promoted, the purity of the polyoxymethylene dialkyl ether obtained through rectification is more than 99.5%, the yield is greater than 97%, and the atom utilization rate is close to 100%.

Description

technical field [0001] The invention relates to a method for refining polyoxymethylene dialkyl ether by catalytic hydrogenation in a slurry bed, and belongs to the fields of coal-based energy chemical industry, clean energy and chemical process refining. Background technique [0002] Surveys in recent years have shown that the apparent consumption of diesel in my country has reached about 167 million tons, resulting in frequent shortages of diesel supply (the domestic demand ratio of diesel and gasoline is about 2.5:1, while the current output ratio is about 2.3:1) . In addition to institutional reasons such as unreasonable pricing of different types of oil products and slow linkage between domestic refined oil prices and international crude oil prices, the fundamental reason is the constraints of resource shortages. Traditionally, oil is used as raw material for diesel production. China's relatively "rich in coal, poor in oil, and low in gas" resource endowment has made the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/58C07C43/30
CPCC07C41/56C07C29/141C08G2/28C08G2/34C08L59/02C07C43/303C07C31/04C10L1/02
Inventor 商红岩赵会吉洪正鹏徐成娟刘晨光
Owner DONGFANG HONGSHENG NEW ENERGY APPL TECH RES INST
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