RU2015143652A - Способ улучшения низкотемпературных свойств и увеличения выхода среднедистиллятного исходного сырья через полностью жидкостную гидроочистку и депарафинизацию - Google Patents

Способ улучшения низкотемпературных свойств и увеличения выхода среднедистиллятного исходного сырья через полностью жидкостную гидроочистку и депарафинизацию Download PDF

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RU2015143652A
RU2015143652A RU2015143652A RU2015143652A RU2015143652A RU 2015143652 A RU2015143652 A RU 2015143652A RU 2015143652 A RU2015143652 A RU 2015143652A RU 2015143652 A RU2015143652 A RU 2015143652A RU 2015143652 A RU2015143652 A RU 2015143652A
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middle distillate
feedstock
effluent
reaction zone
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RU2649389C2 (ru
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Хасан ДИНДИ
Сандип ПАЛИТ
Алан Говард ПУЛЛИ
Луис Эдуардо МУРИЛЬО
Тхань Зя ТА
Брайан БОУГЕР
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Е.И.Дюпон Де Немур Энд Компани
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Claims (22)

1. Полностью жидкостный способ гидрообработки исходного сырья среднедистиллятного топлива, включающий
(a) введение в контакт исходного сырья с (i) разбавителем и (ii) водородом с получением смеси исходного сырья/разбавителя/водорода, где водород растворяют в смеси для получения жидкого сырья;
(b) введение в контакт смеси исходного сырья/разбавителя/водорода с катализатором гидрообработки в первой реакционной зоне, с получением первого эффлюента продукта и
(c) введение в контакт первого эффлюента продукта с катализатором депарафинизации во второй реакционной зоне, с получением второго эффлюента продукта, содержащего лигроин и среднедистиллятный продукт;
где среднедистиллятный продукт имеет по меньшей мере одно улучшенное низкотемпературное свойство по сравнению с исходным сырьем среднедистиллятного топлива и имеет выход по меньшей мере 85 мас.%.
2. Способ по п. 1, где исходное сырье среднедистиллятного топлива имеет содержание азота по меньшей мере 200 wppm (массовых частей на миллион), и среднедистиллятный продукт имеет температуру помутнения, по меньшей мере на 15°C более низкую по сравнению с исходным сырьем среднедистиллятного топлива.
3. Способ по п. 1, где исходное сырье среднедистиллятного топлива имеет содержание азота по меньшей мере 200 wppm, и среднедистиллятный продукт характеризуется увеличением соотношения изо- и н-парафинов по меньшей мере 1,5 по сравнению с исходным сырьем среднедистиллятного топлива.
4. Способ по п. 1, где исходное сырье среднедистиллятного топлива имеет содержание азота по меньшей мере 90 wppm, и среднедистиллятный продукт имеет температуру помутнения, по меньшей мере на 25°C более низкую по сравнению с исходным сырьем среднедистиллятного топлива.
5. Способ по п. 1, где исходное сырье среднедистиллятного топлива имеет содержание азота по меньшей мере 90 wppm, и среднедистиллятный продукт характеризуется увеличением соотношения изо- и н-парафинов по меньшей мере 18 по сравнению с исходным сырьем среднедистиллятного топлива.
6. Способ по п. 1, где стадии (b) и (c) проводят в одном реакторе, содержащем один или более слоев катализатора.
7. Способ по п. 1, где стадии (b) и (c) проводят в отдельных реакторах, при этом каждый из реакторов содержит один или более слоев катализатора.
8. Способ по п. 1, где первый эффлюент продукта содержит растворенные в нем H2S и NH3 и подается непосредственно во вторую реакционную зону.
9. Способ по п. 1, где первая реакционная зона имеет температуру в пределах диапазона от приблизительно 225°C до приблизительно 425°C и давление в пределах диапазона от приблизительно 3,0 МПа до приблизительно 17,5 МПа.
10. Способ по п. 1, где вторая реакционная зона имеет температуру в пределах диапазона от приблизительно 225°C до приблизительно 425°C и давление в пределах диапазона от приблизительно 3,0 МПа до приблизительно 17,5 МПа.
11. Способ по п. 1, где и исходное сырье среднедистиллятного топлива, и среднедистиллятный продукт являются дизельными топливами.
12. Способ по п. 1, где катализатор депарафинизации содержит кристаллическую, микропористую структуру оксида.
13. Способ по п. 1, где катализатор депарафинизации содержит цеолит.
14. Способ по п. 13, где цеолит имеет 8-членную кольцевую структуру, 10-членную кольцевую структуру или 12-членную кольцевую структуру.
15. Способ по п. 1, где катализатор депарафинизации содержит цеолит, не имеющий удерживаемого на нем металла.
16. Способ по п. 1, дополнительно включающий введение в контакт второго эффлюента продукта с катализатором гидрообработки в третьей реакционной зоне с получением третьего эффлюента продукта.
17. Способ по п. 1, дополнительно включающий выделение второго эффлюента продукта.
18. Способ по п. 1, дополнительно включающий рециркуляцию части второго эффлюента продукта для применения в качестве всего разбавителя или его части.
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