Middle coalite tar processing and treating method

Middle coalite tar processing and treating method

  • CN 103,695,036 B
  • Filed: 12/31/2013
  • Issued: 10/28/2015
  • Est. Priority Date: 12/31/2013
  • Status: Active Grant
First Claim
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1. a coalite tar processing and treating method in, is characterized in that:

  • comprise the following steps;

    (1) middle coalite tar is removed solid residue, be 25um-100um by the solids removal in coal tar to diameter, then carry out pre-treatment;

    (2) after step (1) process, carry out fractionation again, obtain carbolic oil, water and heavy oil;

    (3) carbolic oil that step (2) obtains is carried out proposing phenol process, obtain smart phenolic product and dephenolize oil;

    (4) the dephenolize oil obtained in the heavy oil obtained in step (2) and step (3) is mixed into ebullated bed reactor and carries out hydrogenation reaction, obtain upgrading heavy oil and sulfur-bearing, ammonia-containing gas byproduct;

    (5) by the upgrading heavy oil that step (4) obtains, carry out hydrofining and hydrocracking reaction, obtain dry gas, liquefied gas, petroleum naphtha, diesel product and tail oil product;

    Hydrofining described in step (5) and hydrocracking reaction are;

    hydrofining reaction product is before entering hydrocracking reactor, be introduced into separation column, hydrotreated product is obtained naphtha fraction by fractionation, diesel oil distillate, dry gas, liquefied gas and tail oil fraction, naphtha fraction and the direct carrying device of diesel oil distillate, tail oil fraction mixes with the unconverted oil produced after hydrocracking reaction carries out hydrocracking reaction, isocrackate is obtained naphtha fraction by fractionation, diesel oil distillate, dry gas, liquefied gas, unconverted oil and tail oil, get rid of outside tail oil part,When the catalyst is added, set up catalyzer and add/draw off tank with pressure difference between reactor at 0-2.0MPa, utilize oil product to carry and with pressure difference, catalyzer is added in reactor;

    When catalyzer draws off, set up catalyzer and add/draw off tank with pressure difference between reactor at-2.0-0MPa, utilize oil product to carry, with pressure difference, the catalyzer in reactor is discharged to catalyzer and add/draw off tank.

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