Unlock instant, AI-driven research and patent intelligence for your innovation.

Catalyst for preparing isobutene through isomerizing n-butene, preparation method and application of catalyst

A technology of n-butene and catalysts, applied in the field of catalysts, can solve the problems that the production of isobutene cannot meet the needs of the production of etherification units and the increase in demand, and achieve the effect of suppressing by-products

Active Publication Date: 2014-02-19
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE) show high octane number, low vapor pressure and good performance in gasoline distillate hydrocarbons in reformulated gasoline and oxygenated gasoline Solubility makes it an excellent gasoline additive, and the demand is increasing rapidly, so that the output of isobutene obtained by traditional petroleum catalytic cracking and thermal processing is far from meeting the needs of etherification unit production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Catalyst for preparing isobutene through isomerizing n-butene, preparation method and application of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 152g of pseudo-boehmite (containing 67% by weight Al 2 o 3 , Shandong Aluminum Works) mixed with 400mL deionized water, then added 144g silica sol (containing 25% by weight SiO 2 ), stir evenly, add 101g di-n-propylamine, 230g phosphoric acid (85%) and 300mL deionized water successively, and stir evenly again. The resulting mixture was transferred to an autoclave and crystallized at 190 °C for 48 hours under autogenous pressure. The crystallized product was filtered, washed, dried at 120° C., and calcined at 550° C. for 4 hours to obtain SAPO-11 molecular sieve.

[0048] The obtained SAPO-11 molecular sieve and pseudo-boehmite were dry-mixed at a weight ratio of 1:1, then a small amount of dilute nitric acid solution was added dropwise, and kneaded into a material that could be extruded, and extruded to obtain a 2 mm diameter bar The shape was dried at 120°C for 4 hours, and fired at 540°C for 4 hours to obtain SAPO-11 molded body 1 (abbreviated as Z1).

[0049] Imm...

Embodiment 2

[0051] Immerse 20g of Z1 in 17mL of 0.1mol / L ethyl orthosilicate cyclohexane solution at room temperature for 6 hours, dry the impregnated Z1 at 120°C for 4 hours, and then calcinate it in air atmosphere at 500°C for 6 hours. Hours, modified SAPO-11 catalyst 3 (abbreviated as Z3) was obtained, wherein the content of silicon dioxide based on the weight of Z1 was 0.5% by weight, and the content of SAPO-11 molecular sieve based on the weight of Z3 was 49.8% by weight.

Embodiment 3

[0053] Immerse 20g of Z1 in 13mL of 0.05mol / L simethicone cyclohexane solution at 50°C for 6 hours, dry the impregnated Z1 at 120°C for 4 hours, and bake in air atmosphere at 500°C for 6 hours , to obtain modified SAPO-11 catalyst 4 (abbreviated as Z4), wherein the content of silicon dioxide based on the weight of Z1 is 0.2% by weight, and the content of SAPO-11 molecular sieve based on the weight of Z4 is 49.9% by weight.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a catalyst for preparing isobutene through isomerizing n-butene, comprising an SAPO-11 (Silicoaluminophosphate) molded body and silicon dioxide loaded on the SAPO-11 molded body, wherein the SAPO-11 molded body comprises an SAPO-11 molecular sieve, the content of silicon dioxide is 0.05-2 wt% of the weight of the SAPO-11 molded body, and the content of the SAPO-11 molecular sieve is 10-80 wt% of the weight of the catalyst. The invention further relates to a method for preparing the catalyst and a method for preparing isobutene through isomerizing n-butene by using the catalyst. In the invention, isobutene can be generated in a highly selectable way through isomerizing the n-butene by using the modified SAPO-11 catalyst, and by-products like C8 generated by dimerization of butene are inhibited to a great extent.

Description

technical field [0001] The invention relates to a catalyst for isomerizing n-butene to prepare isobutene, a method for preparing the catalyst and an application of the catalyst in isomerizing n-butene to prepare isobutene. Background technique [0002] Since methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE) show high octane number, low vapor pressure and good performance in gasoline distillate hydrocarbons in reformulated gasoline and oxygenated gasoline Solubility makes it an excellent gasoline additive, and the demand is increasing rapidly, so that the output of isobutene obtained by traditional petroleum catalytic cracking and thermal processing is far from meeting the needs of etherification unit production. After the separation of methanol and ether, the outlet material of the etherification unit for producing MTBE contains 40-100% by weight of n-butene, so the skeletal isomerization of this n-butene-rich material to produce isobutene can achieve the prod...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85B01J37/02C07C5/27C07C11/09
Inventor 任行涛栗同林赵岚张利霞杨光裴庆君刘艳惠伦志红
Owner CHINA PETROLEUM & CHEM CORP