TH5083B

TH5083B - Propylene preparation

Info

Publication number: TH5083B
Application number: TH8901001355A
Authority: TH
Inventors: อิซากะ นายโตชิยูกิ; อารากิ นายชินทาโร; มัทสุนากะ นายฟูจิฮิซะ; ยาสุฮาระ นายมิชึกิ; ฟูกุฮาระ นายฮิโรชิ
Original assignee: นายเดชอุดม ไกรฤทธิ์
Filing date: 1989-12-20
Publication date: 1996-01-25

Abstract

เตรียมโพรพิลีนออกมาได้ในปริมาณสูงและมีความจำเพาะเจาะจงสูงด้วย โดยการดีไฮเดรทติ้งไอโซโพรพานอลโดยมีแคทาลิสท์ ช-อะลูมินาที่มีค่าเฉลี่ยของเส้นผ่าศูนย์กลางของรูจาก 30 - 150 A0 โดยมีส่วนเบี่ยงเบนมาตรฐาน ( n) จาก 10 - 40 A0 เมื่อคิดจากการคำนวณทางสถิติจากเส้นผ่าศูนย์กลางและปริมาตร ของรู High yield and high specificity of polypropylene can also be prepared. by dehydrating isopropanol with catalyst G-alumina with mean hole diameter from 30 - 150 A0 with standard deviation ( n) from 10 - 40 A0 when statistically calculated from hole diameter and volume.

Claims

1. Process of propylene preparation consists of dehydrating isopropanol. With a catalist G - Alumina, which It is low alkali G-Alumina, at least 90% by weight of sh-alumina, less than 10% by weight of silica, and up to 0.5% by weight of alkali catalyst oxide. Such-alumina is Sh-Alumina that is Weak acids with pKa ranges from +3.3 to 6.8 when measured with a Hammett meter and the acid content integra is up to 0.5 meg / g in dry weight. And have the mean of the diameter The center of the hole ranges from 3 to 15 nm (30 degrees to 150 degrees) with standard deviation (6n) in the range from 1 to 4 nm (10 to 40 A0) when calculated by statistical calculations from the line. Diameter and volume of holes

2. Proceeding of claim 1 where such ch-alumina is used in the form of catalyst and isopropanol classes in The gas state has passed through the aforementioned catalyst layer in a possible direction According to the following equation (chemical formula), where M is the number of moles of isopropanol fed per hour in moles / h, R is the gas constant equal to 0.082 liter atmosphere / Degree mole, T is the temperature of the aforementioned catalyst in decalines, P is the reaction pressure in atmosphere, H is the circular ratio of 3.14, and R is the radius of the catalyst along the cross-section which is Cross with isopropanol flow direction in centimeters

3. The movement according to claim 1 or 2 in which the catalist Such-alumina has a minimum hole volume of 0.4 m3 / g in dry weight.

4. Any of the preceding claims processes where such isopropanol is prepared. By reacting benzene and Propylene is obtained as phenol and acetone by the Cumene process and Converting such acetone to isopropanol And use polypropylene Prepared from the aforementioned isopropanol as a starting point for Next queue process (4 claims, 2 pages, 2 pictures)