Method for preparing liquid paraffin by hydrogenating waste animal and plant oil

A technology of discarded animals and plants and liquid paraffin, which is applied in the field of hydrogenation of waste animal and vegetable oils to prepare liquid paraffin, which can solve the problems of poor fluidity at low temperature and cannot be used in areas with low temperature, and achieves the effect of a wide range of applications
CN110499178AInactive Publication Date: 2019-11-26易高生物化工科技(张家港)有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
易高生物化工科技(张家港)有限公司
Publication Date
2019-11-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing liquid paraffin by hydrogenating waste animal and plant oil. The method comprises the following steps: a) uniformly mixing the waste animal and plant oilwith the liquid paraffin to obtain a mixture; b) mixing the mixture with hydrogen, feeding the mixture and hydrogen into a hydrofining reactor, and carrying out a hydrofining reaction; c) feeding a material generated by the reaction into a hydrodewaxing reactor, and then carrying out a hydrodewaxing reaction; d) feeding the obtained material into a high-pressure separator, and performing separation to obtain a gas, product oil and product water; and e) feeding the product oil into a stripping tower, desulfurizing the product oil, then feeding the desulfurized product oil into a normal-pressure fractionating tower, and performing fractionation to obtain light liquid paraffin at the upper part of the normal-pressure fractionating tower and liquid paraffin at the bottom of the normal-pressure fractionating tower. The hydrodewaxing process is added, a proper hydrodewaxing catalyst is selected, and the hydrodewaxing process parameters are adjusted to produce the liquid paraffin with a condensation point of -30 DEG C without changing the hydrofining process parameters.
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Description

technical field

[0001] The invention belongs to the field of energy and chemical industry, and in particular relates to a method for preparing liquid paraffin by hydrogenating waste animal and vegetable oils. Background technique

[0002] The amount of waste oil produced in my country every year is very large. Using the waste oil and catering waste oil recycled in large and medium-sized cities to prepare biodiesel can not only reduce the production cost of biodiesel, but also comprehensively utilize industrial waste oil and other waste oils. Turn waste oil into treasure, so as to realize the coordinated development of economy and environmental protection.

[0003] At present, waste bio-oil can be converted into long-chain saturated n-alkanes through hydrogenation process, that is, second-generation biodiesel. However, the cold filter point of biodiesel produced by this process is generally 10-20°C, and its low-temperature fluidity is poor, so it cannot Use in areas with low ...

Claims

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