CN102249850B - Method for preparing high-purity isopropanol - Google Patents

Abstract

The invention provides a novel method for preparing high-purity isopropanol. According to the method provided by the invention, energy consumption can be greatly reduced while guaranteeing the purity of the isopropanol and the pollution on the environment is small. The method for preparing the high-purity isopropanol comprises the following steps of: (1) adding set amount of isopropanol raw material into a raw material pot and adding appropriate amount of special metal complexing agent, agitating and uniformly mixing; (2) then dehydrating the material which is treated in the step (1) by utilizing a 4-angstrom molecular sieve (a common adsorbent); (3) removing residual fine mechanical impurities in the isopropanol by utilizing a 5-micron polypropylene filtering core, removing micro organic impurities through utilizing a granular active carbon filtering core, then removing micro suspended materials through utilizing a 1-micron polypropylene filtering core and finally, removing metal ion impurities by utilizing a 0.0001-micron reverse osmosis membrane; (4) sampling and analyzing the material which is treated by the step (3); and (5) putting the finished products into a storage.

Description

The production method of high purity Virahol

Technical field

The present invention relates to the industrial chemicals processing technique field, be specially the production method of high purity Virahol.

Background technology

Existing method of producing Virahol, it comprises following processing step, and the series of steps such as rectifying, ultrafiltration, ion exchange resin are purified, and this technique is not only complicated, and the energy consumption that rectifying need to be a large amount of, simultaneously can be to environment.

Summary of the invention

For the problems referred to above, the invention provides a kind of production method of new high purity Virahol, it,, when guaranteeing Virahol purity, can significantly reduce energy consumption, and pollution on the environment is little.

Its technical scheme is such, it is characterized in that: it comprises the following steps,

(1), the Virahol raw material of set amount is added to head tank, and add appropriate special-purpose metal complexing agent, stir, mix;

(2) the material that, will (1) process through step 4A molecular sieve dehydration;

(3) the material that, will (2) process through step is removed tiny mechanical impurity residual in Virahol with 5 microns polypropylene filter cores, remove atomic organic impurity by the grain active carbon filter core again, then remove atomic suspended substance with 1 micron polypropylene filter core, finally with the reverse osmosis membrane of 0.0001 micron, remove impurity metal ion;

(4), will be through step material sampling analysis (3)

(5), finished product warehouse-in.

It is further characterized in that: the Virahol after (2) step dewaters is filtered by 800 order double-layer nylon cloth, remove the molecular sieve fine particle; Described special-purpose metal complexing agent is disodium ethylene diamine tetraacetate.

In above-mentioned technique of the present invention, adopted complexing agent and complexing of metal ion, improved the effect of reverse osmosis.Compare with traditional rectificating method, saved a large amount of energy, be easy to the totally-enclosed and automatic production of whole production line, the production cycle shortens dramatically, and the security of production is improved, and the pollution level of environment also is effectively controlled.

The accompanying drawing explanation

Fig. 1 is schema of the present invention.

Embodiment

Below in conjunction with Fig. 1, the present invention is further described:

(1), the Virahol raw material of set amount is added to head tank, and add appropriate disodium ethylene diamine tetraacetate, stir, mix;

(2) the material that, will (1) process through step 4A molecular sieve dehydration; Then filter by 800 order double-layer nylon cloth, remove the molecular sieve fine particle;

(3) the material that, will (2) process through step is removed in Virahol residual thin with 5 microns polypropylene filter cores

Widget impurity, then remove atomic organic impurity by the grain active carbon filter core, then with 1 micron polypropylene filter core, remove atomic suspended substance, finally with the reverse osmosis membrane of 0.0001 micron, remove impurity metal ion;

(6), will be through step material sampling analysis (3)

(7), finished product warehouse-in.

Claims (2)

1. high purity Virahol production method, it is characterized in that: it comprises the following steps,

(1), the Virahol raw material of set amount is added to head tank, and add appropriate special-purpose metal complexing agent, stir, mix;

(2) the general sorbent material dehydration of 4A molecular sieve for the material that, then will (1) process through step;

(3) material that, will process through step (2) is removed tiny mechanical impurity residual in Virahol with 5 microns polypropylene filter cores, remove atomic organic impurity by the grain active carbon filter core again, then remove atomic suspended substance with 1 micron polypropylene filter core again, finally with the reverse osmosis membrane of 0.0001 micron, remove impurity metal ion;

(4), will be through the material sampling analysis of step (3);

(5), finished product warehouse-in;

Described special-purpose metal complexing agent is disodium ethylene diamine tetraacetate.

2. high purity Virahol production method according to claim 1, is characterized in that: the Virahol after (2) step dewaters is filtered by 800 order double-layer nylon cloth, remove the molecular sieve fine particle.

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