Process for producing diatomic alcohol and polyol from cracking sorbierite

A technology for sorbitol and dihydric alcohol, applied in the field of dihydric alcohol and polyhydric alcohol, can solve the problem of no technical scheme and implementation scheme, etc., and achieve the effects of strong production flexibility, reduced hydrogen cost and high yield

Inactive Publication Date: 2005-10-19
王宗国
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Chinese patent CN 1246077A discloses a "nickel / ruthenium catalyst and method for aqueous phase reaction", which mentions the hydrogenation reaction in the presence of the catalyst, which includes converting sorbitol into ethylene glycol, propylene glycol and Glycerin, but no specific technical scheme and implementation
Existing literature has not yet reported such a comprehensive and specific production route and method of the present invention

Method used

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  • Process for producing diatomic alcohol and polyol from cracking sorbierite
  • Process for producing diatomic alcohol and polyol from cracking sorbierite
  • Process for producing diatomic alcohol and polyol from cracking sorbierite

Examples

Experimental program
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Effect test

Embodiment 1

[0075] 1. Production of sorbitol:

[0076] Convert 1000 kilograms of corn into starch milk (700 kilograms on a dry basis), in the presence of amylase and glucoamylase, generate about 742 kilograms of 70% liquid glucose with water, cool and crystallize at 24 ° C, and obtain 865 kilograms of 60 after centrifugation % tidal sugar solution, then, in the presence of nickel catalyst, carry out hydrogenation reaction with hydrogen at 156 ℃ and about 10Mpa to obtain 860 kilograms of sorbitol for use.

[0077] 2. Production of Methanol:

[0078] Mix 325 kg / h of methanol and 183 kg / h of desalted water, pressurize, preheat, vaporize and overheat to a reaction temperature of 260°C, and carry out a conversion reaction at a reaction pressure of about 0.9Mpa in the presence of a catalyst to obtain about 900Nm 3 / hour reformed gas, wherein the hydrogen content is 73-74.5%. Then the high-temperature reformed gas is cooled and condensed to below 40°C, and purified by conventional methods to o...

Embodiment 2

[0084] Except adopting purchased sorbitol and hydrogen hydrogen as raw materials, other described various described alcohols are produced according to the method identical with embodiment 1.

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Abstract

The present invention relates to sorbierite cracking process to prepare C2-C4 diatomic alcohol and polyol, and is especially the process of preparing sorbierite with corn material and hydrocracking sorbierite to prepare C2-C4 diatomic alcohol and polyol. The process includes hydrocracking sorbierite to prepare the mixture of C2-C4 diatomic alcohol and polyol at high temperature and high pressure in the presence of cracking sodium hydroxide and nickel/ruthenium catalyst, separation and refining to obtain single product. The production process of the present invention has the advantages of novel production path, unique technological condition, simultaneous production of several kinds of alcohol and high product quality. In addition, using grains, such as corn, as material to replace non-regenerable resource is significant.

Description

technical field [0001] The invention relates to a method for producing dibasic alcohols and polyalcohols by sorbitol water phase cracking, especially to produce ethylene glycol, propylene glycol, glycerol, Method for diols and polyols such as butanediol. Background technique [0002] The production methods of dibasic alcohols and polyols currently on the market all use petroleum as raw materials. For example, ethylene glycol is produced from ethylene oxide, and propylene glycol is produced from propylene oxide. The market applications of these alcohols are very large. For example, the annual consumption of ethylene glycol in the world is 15.65 million tons, and a large amount of petroleum raw materials are consumed every year. Based on factors such as the current oil shortage and rising prices, people are looking for a renewable resource to replace petroleum raw materials, which will have more development prospects. With the development of agricultural technology, the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C29/00C07C29/128C07C31/20C07C31/22
CPCC07C29/00C07B2200/07
Inventor 徐周文
Owner 王宗国
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