Method for recovering suspended solid in terephthalic acid refining mother liquid
A technology for terephthalic acid and suspended solids, which is applied in the field of recovery of suspended solids in terephthalic acid refining mother liquor, can solve the problems of increasing waste water treatment load, waste of resources, etc. Significant economic benefits
Inactive Publication Date: 2012-08-01
TREKINTAL CHEM PROD & EQUIP KUSN
View PDF3 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to provide a method for recovering suspended solids in terephthalic acid refining mother liquor, to solve the problem that the existing treatment method of terephthalic acid refining mother liquor increases the waste water treatment load and causes waste of resources
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0032] The present invention filters the suspended solid particles in the terephthalic acid refining mother liquor, so that the filter cake is formed on the outside of the filter element and realizes recovery, which improves the recovery rate of solid suspended matter, reduces the discharge of organic pollutants, and reduces the Raw material consumption and sewage treatment load.
[0033] The present invention is specifically described below in conjunction with accompanying drawing, please refer to figure 1 , which is a flow chart of an embodiment of the method for recovering suspended solids in terephthalic acid refining mother liquor of the present invention, which includes the following steps:
[0034] S11, sending the refined mother liquor to the filter. Under a certain pressure, the refined mother liquor is sent to the filter, and the flow is controlled according to the opening of the filter mother liquor inlet regulating valve.
[0035] S12, filtering the refined mothe...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a method for recovering suspended solid in terephthalic acid refining mother liquid. The method comprises the following steps that: a, refining mother liquid is fed into a filter; b, the refining mother liquid is filtered through a filter core arranged in the filter in a mode from the outside to the inside, and in addition, a filter cake is formed outside the filter core; c, mother liquid and filtered liquid in the filter are discharged, and in addition, the filter cake is dried; d, acetic acid is conveyed into the filter, and in addition, pulse back flushing is carried out, so the filter cake and the filter core are disconnected; and e, the filter cake is discharged to a pulping tank. The method has the advantages that the filtering effect is good, the recovery rate is high, the organic contaminant discharge is reduced, the sewage treatment load is reduced, and the economic benefits are obvious.
Description
technical field [0001] The invention relates to a solid-liquid separation method, in particular to a method for recovering solid suspended matter in a terephthalic acid refining mother liquor. Background technique [0002] The production of purified terephthalic acid (PTA) is generally based on p-xylene (PX) as raw material, cobalt acetate and manganese acetate as catalyst, hydrobromic acid as cocatalyst, acetic acid as solvent, under certain temperature and pressure, Terephthalic acid is obtained by continuous air oxidation, and then crystallized, separated, and dried to obtain crude terephthalic acid (CTA). The crude terephthalic acid can be obtained by hydrogenation, crystallization, separation, and drying. Purified terephthalic acid (PTA) for the production of polyester. [0003] In the process of preparing purified terephthalic acid (PTA) from crude terephthalic acid (CTA), the separated acetic acid solvent rich in catalysts, other organic by-products and inorganic imp...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): C07C63/26C07C51/42
Inventor 俞国平崔柏艳陈明裕梁涛
Owner TREKINTAL CHEM PROD & EQUIP KUSN