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Process for deeply treating rubber accelerator DCBS mother liquor wastewater and recovering BT

A rubber accelerator and advanced treatment technology, which is applied in water/sewage treatment, water/sewage multi-stage treatment, chilled water/sewage treatment, etc., can solve the problems of high operating cost, difficulty in long-term stable operation, and large investment in equipment. To achieve the effect of high biological toxicity

Pending Publication Date: 2022-04-29
KEMAI CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, looking at many treatment schemes, although the current short-term emission problem can be solved, there are still many problems such as large equipment investment, high operating cost, and difficulty in long-term stable operation of the treatment process.

Method used

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  • Process for deeply treating rubber accelerator DCBS mother liquor wastewater and recovering BT
  • Process for deeply treating rubber accelerator DCBS mother liquor wastewater and recovering BT
  • Process for deeply treating rubber accelerator DCBS mother liquor wastewater and recovering BT

Examples

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Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: This example provides a method for treating rubber accelerator wastewater. The method includes the following steps: (1) Under low-temperature sedimentation conditions, the rubber accelerator DCBS mother liquor wastewater (COD>50000mg / L) can be effectively removed COD, and reduce the salt content; Table 1 shows the treatment effect under cooling and sedimentation. The waste water can effectively remove the sodium sulfonate salt by cooling down, and at the same time reduce the COD, which can effectively reduce the difficulty of catalytic oxidation;

[0033] Table 1

[0034]

[0035] (2) Add approximately 5wt‰ copper-based catalyst copper sulfate to the wastewater (COD≈50000mg / L) to catalyze the oxidation degradation of organic matter (COD<5000mg / L) at a temperature of 250°C;

[0036] Investigate the oxidation effect under the conditions of 2MPa / 3MPa / 4MPa / 5MPa respectively; Table 2 shows the oxidation effect under different pressure conditions;

[0037] Tab...

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Abstract

The invention belongs to the field of wastewater treatment, and particularly relates to a process for deeply treating rubber accelerator DCBS mother liquor wastewater and recycling BT. Comprising the following steps: 1) cooling rubber auxiliary DCBS mother liquor wastewater at-10 DEG C to remove a part of salt and organic matters; 2) carrying out catalytic oxidation to separate out most organic matters, and then reducing COD (Chemical Oxygen Demand) to 5000mg / L or below; 3) performing MVR evaporation concentration on the filtrate, and returning mother liquor to a raw water system for retreatment; the condensed water is adsorbed by activated carbon and returns to a production system for recycling; 4, the BT raw material can be recycled after the saturated activated carbon is subjected to steam backwashing. Four process schemes are effectively combined, the problem of water treatment in the past is solved, the treatment process is economical and feasible, and the environmental protection risk of an original treatment means is reduced.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a BT process for advanced treatment and recovery of waste water from rubber accelerator DCBS mother liquor. Background technique [0002] During the synthesis of rubber accelerator DCBS, some by-products will be produced. These by-products are heterocyclic compounds with relatively stable chemical composition and structure, and are difficult to degrade. These by-products are dissolved in water, resulting in complex wastewater components, difficult to degrade, and biological toxicity. Large, which seriously inhibits the degradation of biochemical organic matter by microorganisms. After the waste water is evaporated and concentrated, the mother liquor is more difficult to treat. The main reason is that the waste water has a high salt content. It is also difficult to biochemically remove organic matter after treatment, and the requirements for bacteria are relatively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/30
CPCC02F9/00C02F1/22C02F1/725C02F1/041C02F1/283C02F2303/16C02F2101/30
Inventor 李霞陆平魏伟涛刘海良何秀萍
Owner KEMAI CHEM
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