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1,3-urylene di (dithioformate) and its preparation method and application as deoil agent

A technology of dithiocarbamate and ureido dithiocarbamate, applied in 1 field, can solve the problem of high cost of dithiocarbamate, and achieve the effects of easy availability of production raw materials, elimination of pollution, and simple production process

Active Publication Date: 2007-02-14
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to overcome the deficiencies in the prior art, solve the problem of high cost of dithiocarbamate, provide a kind of 1,3-ureidene bis(dithiocarbamate) and its preparation method and as a Application of oil

Method used

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  • 1,3-urylene di (dithioformate) and its preparation method and application as deoil agent
  • 1,3-urylene di (dithioformate) and its preparation method and application as deoil agent
  • 1,3-urylene di (dithioformate) and its preparation method and application as deoil agent

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Embodiment 1

[0048] Embodiment 1: the concrete steps of this embodiment are as follows:

[0049] 1. The raw materials and formula (unit-kilogram) of the present embodiment:

[0050] Urea: 100.0 kg

[0051] Carbon disulfide: 238.0 kg

[0052] Sodium hydroxide solution (mass fraction is 50%): 275.0 kilograms

[0053] Sodium gluconate: 1.0 kg

[0054] Water: 386.0 kg

[0055] 2. Process steps and process parameters

[0056] The preparation of the present invention is carried out under normal pressure:

[0057] That is, first add 100.0 kg of urea, 1.0 kg of sodium gluconate and 386.0 kg of water into the reactor. After stirring and dissolving, slowly add 275.0 kg of sodium hydroxide solution at 15°C and dropwise add 238.0 kg of carbon disulfide. After 4.0 hours of reaction, Raise the temperature to 50°C, continue the reaction for 2.0 hours, cool down and discharge the material. The prepared product is a brown-red liquid, or the brown-red liquid is concentrated by vacuum distillation, fil...

Embodiment 2

[0058] Embodiment 2: the concrete steps of this embodiment are as follows:

[0059] 1. The raw materials and formula (unit-kilogram) of the present embodiment:

[0060] Urea: 74.5 kg

[0061] Carbon disulfide: 180.0 kg

[0062] Sodium hydroxide solution (mass fraction is 40%): 248.5 kilograms

[0063] Sodium aluminate: 50 kg

[0064] Water: 447.0 kg

[0065] 2. Process steps and process parameters

[0066] The preparation of the present invention is carried out under normal pressure:

[0067] That is, first add the above-mentioned calculated amount of urea, sodium aluminate and water into the reactor, stir and dissolve, then slowly add sodium hydroxide solution at 20°C while adding carbon disulfide dropwise, after 2.0 hours of reaction, raise the temperature to 70°C, continue After reacting for 1.5h, the temperature was lowered and the material was discharged. The prepared product was a brownish-red liquid.

Embodiment 3

[0068] Embodiment 3: the concrete steps of this embodiment are as follows:

[0069] 1. The raw materials and formula (unit-kilogram) of the present embodiment:

[0070] Urea: 66.7 kg

[0071] Carbon disulfide: 160.0 kg

[0072] Sodium hydroxide solution (mass fraction is 50%): 166.7 kilograms

[0073] Sodium metaaluminate: 65 kg

[0074] Water: 541.6 kg

[0075] 2. Process steps and process parameters

[0076] The preparation of the present invention is carried out under normal pressure:

[0077] That is, first add the above-mentioned calculated amount of urea, sodium metaaluminate and water into the reactor, stir and dissolve, then slowly add sodium hydroxide solution at 25°C and drop carbon disulfide at the same time, after reacting for 5.0 hours, raise the temperature to 55°C, Continue to react for 2.0h, cool down and discharge the material, the prepared product is a brownish red liquid.

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Abstract

The present invention discloses one kind of 1, 3-dicarbamido bis(dithio formate) and its preparation process and application as deoiling agent. The preparation process includes the first dissolving urea and addivie in water through stirring in a reactor, adding alkali solution of mass fraction 8.0-40.0 % slowly at 0-25 deg.c while dropping CS2 of mass fraction 10.0-25.0 % and reacting for 2.0-5.0 h, heating to 40-75 deg.c and further reacting for 1.0-4.0 hr, cooling and discharging. The product may be reddish brown liquid or faint yellow powder and has the general expression as shown. The product has high quality, and the preparation process is one clean environment friendly process.

Description

Technical field: [0001] The invention belongs to the field of fine chemicals, and in particular relates to a 1,3-ureidene bis(dithioformate) for treating oily waste water, a preparation method thereof and an application as a degreasing agent. Background technique: [0002] Oily wastewater has a wide range of sources, such as oil extraction, oil refining, oil storage and transportation in the petroleum industry, and oily wastewater in the petrochemical industry, tanker ballast water, tank washing water, cooling lubricants in the machinery industry, steel rolling water, and food industry and Wastewater from restaurants and other industries contains a large amount of oil. If oily wastewater is discharged arbitrarily without treatment, it will bring great harm to the ecological environment. Therefore, the treatment and standard discharge of oily wastewater has become an important issue of environmental protection today. However, for some oily wastewater, such as oilfield produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C333/26C09K3/32
Inventor 刘明华余敏叶莉
Owner FUZHOU UNIV
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