Ultralow-temperature urea solution for automobile and preparation method thereof

A vehicle urea, ultra-low temperature technology, applied in mechanical equipment, muffler devices, engine components, etc., can solve problems such as increased failure rate, inconvenient storage, carrying and filling, and increased vehicle costs, and achieves easy storage and widen use. range effect

Inactive Publication Date: 2018-01-16
锦西天然气化工有限责任公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

Ultraviolet rays from sunlight hitting on an extremely low temperatures car's urethane solution will cause it break down into small molecules called gases (ammonia) with very little remaining when stored at room temperature due to their volatility. These tiny gas bubbles are then released during injection into engines causing them to become frostier than usual even if they don’t have added chemicals like ethanol beforehand. By replacing some part of uric acid instead of releasing nitrogen oxide NOx, this technology helps prevent damage caused by these harmful substances found inside cars over time.

Problems solved by technology

This patents discusses various aspects related to emissions control systems: technologies like selectively removing nitrogen from combustion gases during internal combustions processes without harmful substances being released into atmosphere pollution. These new techniques aim to improve air quality while minimizing environmental impacts associated therewith. Additionally, these improvements require lower temperatures than current methods due to increasing demand for more efficient clean gasoline engines.

Method used

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  • Ultralow-temperature urea solution for automobile and preparation method thereof
  • Ultralow-temperature urea solution for automobile and preparation method thereof

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preparation example Construction

[0022] The preparation method of the above-mentioned ultra-low temperature vehicle urea solution, the specific preparation steps are as follows:

[0023] Mix urea, ammonium and high-purity water in proportion, stir until completely dissolved at room temperature, and filter with a filter element with a filtration accuracy of 5 μm to obtain the finished product.

[0024] specific experiment

[0025] The present invention will be further explained below in conjunction with specific experimental data.

[0026] 1. Mix urea, ammonium acetate and high-purity water according to the following ratio, and measure the freezing point temperature, see Table 1 for details.

[0027] Table 1:

[0028] Urea (g)

[0029] It can be seen from the experiment that after adding ammonium acetate, the freezing point of the urea solution is generally within -20°C when the urea concentration is maintained at 32.5%, and the water content of the solution decreases as the ammonium acetate increa...

Embodiment 1

[0045] Select 21 parts of high-purity urea, 10 parts of analytically pure ammonium formate, 15 parts of analytically pure ammonium acetate, and 54 parts of high-purity water; stir at room temperature until fully dissolved, and filter under pressure with a filter element with a filtration accuracy of 5 μm to obtain a mixture solution.

[0046] After measurement, the freezing point of the mixed solution is -35°C, odorless, clear and transparent in appearance, the content of impurity elements meets the requirements of the standard, and the compatibility of plastics meets the requirements; after 4 weeks of storage at room temperature, there is no perceptible change in appearance and odor, performance indicators All tests passed. In the technical center laboratory of Chaochai Power Co., Ltd., the ESC working condition test and the WHTC working condition test were carried out on the diesel engine bench with a displacement of 8.6 liters. The reducing agent was processed by the SCR pos...

Embodiment 2

[0048] Select 27 parts of high-purity urea, 8.4 parts of analytically pure ammonium formate, 12.6 parts of analytically pure ammonium acetate, and 45 parts of high-purity water; stir at room temperature until completely dissolved, and filter under pressure using a filter element with a filtration accuracy of 5 μm to obtain a mixture solution.

[0049] After measurement, the freezing point of the mixed solution is -30.5°C, odorless, the appearance is clear and transparent, the content of impurity elements meets the requirements of the standard, and the compatibility of plastics meets the requirements; after 4 weeks of storage at room temperature, there is no perceptible change in the appearance and smell, and the performance index All tests passed. In the technical center laboratory of Chaochai Power Co., Ltd., the ESC working condition test and the WHTC working condition test were carried out on the diesel engine bench with a displacement of 8.6 liters. The reducing agent was p...

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Abstract

The invention discloses an ultralow-temperature urea solution for an automobile and a preparation method thereof. The urea solution for the automobile is prepared from, by weight, 21-27 parts of urea,21-34 parts of ammonium salt and 45-60 parts of high purity water. The preparation method comprises the steps that urea, ammonium salt and high purity water are mixed in proportion, the mixture is stirred until completely dissolved in the condition of room temperature, then a filter element with the filtration precision 5 micrometers is adopted for filtration, and a finished product is obtained.According to the urea solution for the automobile, the freezing point of the urea solution for the automobile can be effectively reduced through addition of the ammonium salt component, so that the freezing point is lowered to 30 DEG C or below, it is unnecessary to additionally arrange any thermal insulation or heating part on the automobile to apply the urea solution to an automobile in the northern region, the urea solution has the advantages of wide application range and the like, and convenience is brought to storage, carrying and loading in the northern cold region.

Description

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Claims

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Application Information

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Owner 锦西天然气化工有限责任公司
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