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Process for deoxidizing and dehydrating tetrachloroethylene and equipment for process

A tetrachloroethylene and process technology, applied in the field of tetrachloroethylene treatment, can solve the problems of unreachable, low purity, poor chromaticity, etc., and achieve the effects of good chromaticity and simple operation

Active Publication Date: 2012-07-11
李通
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the production process of tetrachlorethylene cleaning agent, deoxygenation and dehydration treatment is a problem that plagues the tetrachlorethylene cleaning agent industry. The volume fractions of the main components in the raw materials for tetrachlorethylene production are, respectively, dichloroethane 0.00001%, trichloro Ethylene 0.00114%, trichloroethane 0.00003%, tetrachloroethane 0.00005%, pentachloroethane 0.00002, tetrachloroethylene 99.99%, moisture 0.0045%, acidity 0.0005%, PH=4.5, although the main content of tetrachloroethylene is very high , but under the premise of no treatment, it is configured as a cleaning agent with a purity of tetrachlorethylene greater than 99.9%, a pH of 8.5, and a water content of less than 0.003%. Agent ZBG16008-89 standard requirements

Method used

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  • Process for deoxidizing and dehydrating tetrachloroethylene and equipment for process
  • Process for deoxidizing and dehydrating tetrachloroethylene and equipment for process
  • Process for deoxidizing and dehydrating tetrachloroethylene and equipment for process

Examples

Experimental program
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Effect test

Embodiment 1

[0043] A perchlorethylene deoxygenation and dehydration process comprises the following steps:

[0044] (1) Send the perchlorethylene to be prepared into the raw material tank V101, and the detection and laboratory indicators include chromaticity, purity, moisture, and pH value;

[0045] (2) According to the test results, use 5A molecular sieve when the moisture is 70-80 ppm, use 4A molecular sieve when the moisture is 60-70ppm, and use 3A molecular sieve when the moisture is 50-60ppm; when the pH value is 2-3, use about 3mm alkaline carbon to deoxidize When the pH value is 3-4, use about 4mm alkaline carbon oxygen scavenger, and when the pH value is 4-5, use about 5mm alkaline carbon oxygen scavenger; if the moisture is 70-80ppm, when the pH is 2-3, The mass ratio of oxygen scavenger to molecular sieve is 1: 9.5; in other cases, the mass ratio of oxygen scavenger to molecular sieve is 1: 10;

[0046] (3) Start the feed pump P101A, send tetrachlorethylene into the deoxygenation...

Embodiment 2

[0055] Such as figure 1 and 2 Shown, a kind of equipment that is used for the perchlorethylene deoxygenation drying process of above-mentioned embodiment 1, comprises the feed pump 101 that communicates successively, deoxygenation drying tower 102, filter 103 and finished product tank 104;

[0056] Described deoxygenation drying tower comprises tower body 13, and the upper and lower ends of described tower body 13 are respectively provided with upper head 4 and lower head 16; Described tower body 13 is divided into upper, middle and lower three sections, each Sections were filled with basic filler basic carbon and molecular sieve Al 2 o 3 , layered in a ratio of 4:3; the bottom and middle of the tower body 13 are respectively provided with filler support grids, and the upper tower body 6 is provided with an alkaline filler baffle 7 and a molecular sieve filler baffle 8, and the upper layer Fill the basic packing, and the molecular sieve packing in the lower layer; the packi...

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Abstract

The invention discloses a process for deoxidizing and dehydrating tetrachloroethylene and equipment for the process. According to the process, a charging pump conveys the preliminarily produced tetrachloroethylene product to a deoxidizing and drying tower through a pipeline provided with a filter, liquid enters the deoxidizing and drying tower through a feeding hole via a buffer plate, flow baffle plates change the flowing direction of the liquid flowing through the wall of the equipment to make the liquid fully contacted with filler layers, and the qualified tetrachloroethylene liquid treated by the filler layers enters a high-quality tetrachloroethylene storage tank through a discharge hole of a deaerator. The equipment comprises the charging pump, the deoxidizing and drying tower, the filter and a finished product tank which are communicated in turn. The invention has the advantages that: the water content in the tetrachloroethylene is reduced, the pH value of the tetrachloroethylene is improved, the purity of the tetrachloroethylene is not influenced and the color of the tetrachloroethylene is good; and enclosed circulation is adopted in a system, waste residue and wastewater cannot be generated, and the operation is simple, safe and reliable.

Description

technical field [0001] The invention relates to a deoxygenation and dehydration process, in particular to a perchlorethylene deoxygenation and dehydration process and equipment thereof, belonging to the field of perchlorethylene treatment. Background technique [0002] In the production process of tetrachlorethylene cleaning agent, deoxygenation and dehydration treatment is a problem that plagues the tetrachlorethylene cleaning agent industry. The volume fractions of the main components in the raw materials for tetrachlorethylene production are, respectively, dichloroethane 0.00001%, trichloro Ethylene 0.00114%, trichloroethane 0.00003%, tetrachloroethane 0.00005%, pentachloroethane 0.00002, tetrachloroethylene 99.99%, moisture 0.0045%, acidity 0.0005%, PH=4.5, although the main content of tetrachloroethylene is very high , but under the premise of no treatment, it is configured as a cleaning agent with a purity of tetrachlorethylene greater than 99.9%, a pH of 8.5, and a wa...

Claims

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Application Information

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IPC IPC(8): C07C21/12C07C17/38C07C17/389
Inventor 李通杨秀玲苗乃芬常炳恩
Owner 李通
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