# US 11,111,205 B2 · Process for preparing alkanediol and dialkyl carbonate

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,111,205 B2
- Document ID: US11111205B2
- Status: Granted
- Kind: B2
- Application number: 16/631,945
- Filed: 2018-07-16
- Published: 2020-06-04
- Granted: 2021-09-07
- Earliest claimed: 2017-07-18
- Assignees: Shell Oil Company
- Applicants: Shell Oil Company
- Inventors: Henri Preising; Frederik Hendrik Van Der Steen; Garo Garbis Vaporciyan; Wolfgang Dirk Lose; Silke Eva Sabine Leonhardt
- Web page: https://patentgrep.com/patent/US11111205B2

## CPC

- C07C 29/128: by alcoholysis
- C07C 68/065: from alkylene carbonates
- B01J 27/1802: {Salts or mixtures of anhydrides with compounds of other metals than V, Nb, Ta, Cr, Mo, W, Mn, Tc, Re, e.g. phosphates, thiophosphates}
- B01J 37/031: {Precipitation}
- B01J 37/04: Mixing {(B01J37/0009, B01J37/0018 take precedence)}
- B01J 37/08: Heat treatment {(B01J37/0009, B01J37/0018 take precedence)}
- C01B 25/36: Aluminium phosphates
- C07C 29/48: by oxidation reactions with formation of hydroxy groups
- Y02P 20/52: using catalysts, e.g. selective catalysts
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The invention relates to a process for the preparation of an alkanediol and a dialkyl carbonate comprising reacting an alkylene carbonate and an alkanol in the presence of a catalyst, wherein the catalyst is aluminum phosphate.

## Claims

### Claim 1

A process for the preparation of an alkanediol and a dialkyl carbonate comprising reacting an alkylene carbonate and an alkanol in the presence of a catalyst, wherein the catalyst is aluminum phosphate.

### Claim 2 (depends on 1)

The process according to claim 1, wherein the aluminum phosphate catalyst is amorphous.

### Claim 3 (depends on 2)

The process according to claim 2, wherein more than 90% of the catalyst is amorphous.

### Claim 4 (depends on 1)

The process according to claim 1, wherein the aluminum phosphate catalyst has a molar (or atomic) ratio [Al]/[P] of from 0.1:1 to 20:1.

### Claim 5 (depends on 1)

The process according to claim 1, wherein the aluminum phosphate is synthesized aluminum phosphate.

### Claim 6 (depends on 5)

The process according to claim 5, wherein the aluminum phosphate catalyst is a catalyst obtained by a process for preparing an aluminum phosphate catalyst, which comprises:
(a) mixing an aluminum containing salt with phosphoric acid in a molar ratio [Al]/[P] of from 0.1:1 to 20:1;
(b) mixing a base with the mixture resulting from step (a), resulting in the formation of an aluminum phosphate precipitate;
(c) optionally heating the precipitate containing mixture; and
(d) recovering the precipitate.

### Claim 7 (depends on 1)

The process according to claim 1, wherein the alkylene carbonate is a C2-C6 alkylene carbonate.

### Claim 8 (depends on 7)

The process according to claim 7, wherein the alkylene carbonate is ethylene carbonate or propylene carbonate.

### Claim 9 (depends on 1)

The process according to claim 1, wherein the alkanol is a C1-C4 alkanol.

### Claim 10 (depends on 9)

The process according to claim 9, wherein the alkanol is methanol, ethanol or isopropanol.